mirror of
https://github.com/cesanta/mongoose.git
synced 2026-10-14 10:20:01 +00:00
3233 lines
103 KiB
C
3233 lines
103 KiB
C
#include "internal.h"
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// Return number of bytes left to read for this connection
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static int64_t left_to_read(const struct mg_connection *conn) {
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return conn->content_len + conn->request_len - conn->num_bytes_read;
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}
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static int call_user(int type, struct mg_connection *conn, void *p) {
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if (conn != NULL && conn->ctx != NULL) {
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conn->event.user_data = conn->ctx->user_data;
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conn->event.type = type;
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conn->event.event_param = p;
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conn->event.request_info = &conn->request_info;
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conn->event.conn = conn;
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}
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return conn == NULL || conn->ctx == NULL || conn->ctx->event_handler == NULL ?
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0 : conn->ctx->event_handler(&conn->event);
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}
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static FILE *mg_fopen(const char *path, const char *mode) {
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#ifdef _WIN32
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wchar_t wbuf[PATH_MAX], wmode[20];
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to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
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MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
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return _wfopen(wbuf, wmode);
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#else
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return fopen(path, mode);
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#endif
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}
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static void sockaddr_to_string(char *buf, size_t len,
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const union usa *usa) {
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buf[0] = '\0';
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#if defined(USE_IPV6)
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inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ?
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(void *) &usa->sin.sin_addr :
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(void *) &usa->sin6.sin6_addr, buf, len);
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#elif defined(_WIN32)
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// Only Windoze Vista (and newer) have inet_ntop()
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strncpy(buf, inet_ntoa(usa->sin.sin_addr), len);
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#else
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inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len);
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#endif
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}
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// Print error message to the opened error log stream.
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static void cry(struct mg_connection *conn, const char *fmt, ...) {
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char buf[MG_BUF_LEN], src_addr[IP_ADDR_STR_LEN];
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va_list ap;
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FILE *fp;
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time_t timestamp;
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va_start(ap, fmt);
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(void) vsnprintf(buf, sizeof(buf), fmt, ap);
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va_end(ap);
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// Do not lock when getting the callback value, here and below.
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// I suppose this is fine, since function cannot disappear in the
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// same way string option can.
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if (call_user(MG_EVENT_LOG, conn, buf) == 0) {
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fp = conn->ctx == NULL || conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
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fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
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if (fp != NULL) {
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flockfile(fp);
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timestamp = time(NULL);
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sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
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fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp,
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src_addr);
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if (conn->request_info.request_method != NULL) {
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fprintf(fp, "%s %s: ", conn->request_info.request_method,
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conn->request_info.uri);
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}
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fprintf(fp, "%s", buf);
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fputc('\n', fp);
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funlockfile(fp);
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fclose(fp);
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}
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}
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}
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const char *mg_version(void) {
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return MONGOOSE_VERSION;
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}
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// HTTP 1.1 assumes keep alive if "Connection:" header is not set
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// This function must tolerate situations when connection info is not
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// set up, for example if request parsing failed.
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static int should_keep_alive(const struct mg_connection *conn) {
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const char *http_version = conn->request_info.http_version;
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const char *header = mg_get_header(conn, "Connection");
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if (conn->must_close ||
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conn->status_code == 401 ||
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mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 ||
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(header != NULL && mg_strcasecmp(header, "keep-alive") != 0) ||
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(header == NULL && http_version && strcmp(http_version, "1.1"))) {
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return 0;
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}
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return 1;
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}
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static const char *suggest_connection_header(const struct mg_connection *conn) {
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return should_keep_alive(conn) ? "keep-alive" : "close";
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}
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static void send_http_error(struct mg_connection *conn, int status,
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const char *reason, const char *fmt, ...) {
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char buf[MG_BUF_LEN];
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va_list ap;
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int len = 0;
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conn->status_code = status;
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buf[0] = '\0';
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// Errors 1xx, 204 and 304 MUST NOT send a body
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if (status > 199 && status != 204 && status != 304) {
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len = mg_snprintf(buf, sizeof(buf), "Error %d: %s", status, reason);
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buf[len++] = '\n';
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va_start(ap, fmt);
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len += mg_vsnprintf(buf + len, sizeof(buf) - len, fmt, ap);
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va_end(ap);
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}
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DEBUG_TRACE(("[%s]", buf));
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mg_printf(conn, "HTTP/1.1 %d %s\r\n"
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"Content-Length: %d\r\n"
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"Connection: %s\r\n\r\n", status, reason, len,
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suggest_connection_header(conn));
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conn->num_bytes_sent += mg_printf(conn, "%s", buf);
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}
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// Write data to the IO channel - opened file descriptor, socket or SSL
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// descriptor. Return number of bytes written.
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static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
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int64_t len) {
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int64_t sent;
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int n, k;
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(void) ssl; // Get rid of warning
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sent = 0;
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while (sent < len) {
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// How many bytes we send in this iteration
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k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
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if (ssl != NULL) {
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n = SSL_write(ssl, buf + sent, k);
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} else if (fp != NULL) {
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n = (int) fwrite(buf + sent, 1, (size_t) k, fp);
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if (ferror(fp))
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n = -1;
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} else {
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n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL);
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}
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if (n <= 0)
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break;
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sent += n;
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}
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return sent;
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}
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// Read from IO channel - opened file descriptor, socket, or SSL descriptor.
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// Return negative value on error, or number of bytes read on success.
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static int pull(FILE *fp, struct mg_connection *conn, char *buf, int len) {
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int nread;
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if (len <= 0) return 0;
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if (fp != NULL) {
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// Use read() instead of fread(), because if we're reading from the CGI
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// pipe, fread() may block until IO buffer is filled up. We cannot afford
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// to block and must pass all read bytes immediately to the client.
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nread = read(fileno(fp), buf, (size_t) len);
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#ifndef NO_SSL
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} else if (conn->ssl != NULL) {
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nread = SSL_read(conn->ssl, buf, len);
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#endif
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} else {
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nread = recv(conn->client.sock, buf, (size_t) len, 0);
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}
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if (nread > 0) {
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conn->num_bytes_read += nread;
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}
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return conn->ctx->stop_flag ? -1 : nread;
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}
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static int pull_all(FILE *fp, struct mg_connection *conn, char *buf, int len) {
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int n, nread = 0;
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while (len > 0 && conn->ctx->stop_flag == 0) {
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n = pull(fp, conn, buf + nread, len);
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if (n < 0) {
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nread = n; // Propagate the error
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break;
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} else if (n == 0) {
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break; // No more data to read
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} else {
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nread += n;
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len -= n;
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}
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}
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return nread;
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}
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int mg_read(struct mg_connection *conn, void *buf, int len) {
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int n, buffered_len, nread = 0;
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int64_t left;
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if (conn->content_len <= 0) {
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return 0;
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}
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// conn->buf body
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// |=================|==========|===============|
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// |<--request_len-->| |
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// |<-----------data_len------->| conn->buf + conn->buf_size
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// First, check for data buffered in conn->buf by read_request().
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if (len > 0 && (buffered_len = conn->data_len - conn->request_len) > 0) {
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char *body = conn->buf + conn->request_len;
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if (buffered_len > len) buffered_len = len;
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if (buffered_len > conn->content_len) buffered_len = (int)conn->content_len;
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memcpy(buf, body, (size_t) buffered_len);
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memmove(body, body + buffered_len,
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&conn->buf[conn->data_len] - &body[buffered_len]);
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len -= buffered_len;
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conn->data_len -= buffered_len;
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nread += buffered_len;
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}
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// Read data from the socket.
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if (len > 0 && (left = left_to_read(conn)) > 0) {
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if (left < len) {
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len = (int) left;
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}
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n = pull_all(NULL, conn, (char *) buf + nread, (int) len);
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nread = n >= 0 ? nread + n : n;
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}
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return nread;
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}
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int mg_write(struct mg_connection *conn, const void *buf, int len) {
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time_t now;
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int64_t n, total, allowed;
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if (conn->throttle > 0) {
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if ((now = time(NULL)) != conn->last_throttle_time) {
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conn->last_throttle_time = now;
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conn->last_throttle_bytes = 0;
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}
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allowed = conn->throttle - conn->last_throttle_bytes;
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if (allowed > (int64_t) len) {
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allowed = len;
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}
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if ((total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
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(int64_t) allowed)) == allowed) {
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buf = (char *) buf + total;
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conn->last_throttle_bytes += total;
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while (total < (int64_t) len && conn->ctx->stop_flag == 0) {
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allowed = conn->throttle > (int64_t) len - total ?
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(int64_t) len - total : conn->throttle;
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if ((n = push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
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(int64_t) allowed)) != allowed) {
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break;
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}
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sleep(1);
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conn->last_throttle_bytes = allowed;
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conn->last_throttle_time = time(NULL);
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buf = (char *) buf + n;
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total += n;
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}
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}
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} else {
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total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
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(int64_t) len);
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}
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return (int) total;
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}
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int mg_url_decode(const char *src, int src_len, char *dst,
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int dst_len, int is_form_url_encoded) {
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int i, j, a, b;
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#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
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for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
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if (src[i] == '%' && i < src_len - 2 &&
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isxdigit(* (const unsigned char *) (src + i + 1)) &&
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isxdigit(* (const unsigned char *) (src + i + 2))) {
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a = tolower(* (const unsigned char *) (src + i + 1));
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b = tolower(* (const unsigned char *) (src + i + 2));
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dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
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i += 2;
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} else if (is_form_url_encoded && src[i] == '+') {
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dst[j] = ' ';
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} else {
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dst[j] = src[i];
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}
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}
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dst[j] = '\0'; // Null-terminate the destination
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return i >= src_len ? j : -1;
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}
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int mg_get_var(const char *data, size_t data_len, const char *name,
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char *dst, size_t dst_len) {
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const char *p, *e, *s;
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size_t name_len;
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int len;
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if (dst == NULL || dst_len == 0) {
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len = -2;
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} else if (data == NULL || name == NULL || data_len == 0) {
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len = -1;
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dst[0] = '\0';
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} else {
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name_len = strlen(name);
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e = data + data_len;
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len = -1;
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dst[0] = '\0';
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// data is "var1=val1&var2=val2...". Find variable first
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for (p = data; p + name_len < e; p++) {
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if ((p == data || p[-1] == '&') && p[name_len] == '=' &&
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!mg_strncasecmp(name, p, name_len)) {
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// Point p to variable value
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p += name_len + 1;
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// Point s to the end of the value
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s = (const char *) memchr(p, '&', (size_t)(e - p));
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if (s == NULL) {
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s = e;
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}
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assert(s >= p);
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// Decode variable into destination buffer
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len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
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// Redirect error code from -1 to -2 (destination buffer too small).
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if (len == -1) {
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len = -2;
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}
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break;
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}
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}
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}
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return len;
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}
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int mg_get_cookie(const char *cookie_header, const char *var_name,
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char *dst, size_t dst_size) {
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const char *s, *p, *end;
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int name_len, len = -1;
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if (dst == NULL || dst_size == 0) {
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len = -2;
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} else if (var_name == NULL || (s = cookie_header) == NULL) {
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len = -1;
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dst[0] = '\0';
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} else {
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name_len = (int) strlen(var_name);
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end = s + strlen(s);
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dst[0] = '\0';
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for (; (s = mg_strcasestr(s, var_name)) != NULL; s += name_len) {
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if (s[name_len] == '=') {
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s += name_len + 1;
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if ((p = strchr(s, ' ')) == NULL)
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p = end;
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if (p[-1] == ';')
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p--;
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if (*s == '"' && p[-1] == '"' && p > s + 1) {
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s++;
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p--;
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}
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if ((size_t) (p - s) < dst_size) {
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len = p - s;
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mg_strlcpy(dst, s, (size_t) len + 1);
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} else {
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len = -3;
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}
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break;
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}
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}
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}
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return len;
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}
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// Return 1 if real file has been found, 0 otherwise
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static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
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size_t buf_len, struct file *filep) {
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struct vec a, b;
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const char *rewrite, *uri = conn->request_info.uri,
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*root = conn->ctx->config[DOCUMENT_ROOT];
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char *p;
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int match_len;
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char gz_path[PATH_MAX];
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char const* accept_encoding;
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// No filesystem access
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if (root == NULL) {
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return 0;
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}
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// Using buf_len - 1 because memmove() for PATH_INFO may shift part
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// of the path one byte on the right.
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// If document_root is NULL, leave the file empty.
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mg_snprintf(buf, buf_len - 1, "%s%s", root, uri);
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rewrite = conn->ctx->config[REWRITE];
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while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
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if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
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mg_snprintf(buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr,
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uri + match_len);
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break;
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}
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}
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if (mg_stat(buf, filep)) {
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return 1;
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}
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// if we can't find the actual file, look for the file
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// with the same name but a .gz extension. If we find it,
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// use that and set the gzipped flag in the file struct
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// to indicate that the response need to have the content-
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// encoding: gzip header
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// we can only do this if the browser declares support
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if ((accept_encoding = mg_get_header(conn, "Accept-Encoding")) != NULL) {
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if (strstr(accept_encoding,"gzip") != NULL) {
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snprintf(gz_path, sizeof(gz_path), "%s.gz", buf);
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if (mg_stat(gz_path, filep)) {
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filep->gzipped = 1;
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return 1;
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}
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}
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}
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// Support PATH_INFO for CGI scripts.
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for (p = buf + strlen(root == NULL ? "" : root); *p != '\0'; p++) {
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if (*p == '/') {
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*p = '\0';
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if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
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strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 &&
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mg_stat(buf, filep)) {
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// Shift PATH_INFO block one character right, e.g.
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// "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00"
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// conn->path_info is pointing to the local variable "path" declared
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// in handle_request(), so PATH_INFO is not valid after
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// handle_request returns.
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conn->path_info = p + 1;
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memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0
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p[1] = '/';
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return 1;
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} else {
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*p = '/';
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}
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}
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}
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return 0;
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}
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// Check whether full request is buffered. Return:
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// -1 if request is malformed
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// 0 if request is not yet fully buffered
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// >0 actual request length, including last \r\n\r\n
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static int get_request_len(const char *buf, int buf_len) {
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int i;
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for (i = 0; i < buf_len; i++) {
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// Control characters are not allowed but >=128 is.
|
|
// Abort scan as soon as one malformed character is found;
|
|
// don't let subsequent \r\n\r\n win us over anyhow
|
|
if (!isprint(* (const unsigned char *) &buf[i]) && buf[i] != '\r' &&
|
|
buf[i] != '\n' && * (const unsigned char *) &buf[i] < 128) {
|
|
return -1;
|
|
} else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') {
|
|
return i + 2;
|
|
} else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' &&
|
|
buf[i + 2] == '\n') {
|
|
return i + 3;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Protect against directory disclosure attack by removing '..',
|
|
// excessive '/' and '\' characters
|
|
static void remove_double_dots_and_double_slashes(char *s) {
|
|
char *p = s;
|
|
|
|
while (*s != '\0') {
|
|
*p++ = *s++;
|
|
if (s[-1] == '/' || s[-1] == '\\') {
|
|
// Skip all following slashes, backslashes and double-dots
|
|
while (s[0] != '\0') {
|
|
if (s[0] == '/' || s[0] == '\\') {
|
|
s++;
|
|
} else if (s[0] == '.' && s[1] == '.') {
|
|
s += 2;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*p = '\0';
|
|
}
|
|
|
|
static const struct {
|
|
const char *extension;
|
|
size_t ext_len;
|
|
const char *mime_type;
|
|
} builtin_mime_types[] = {
|
|
{".html", 5, "text/html"},
|
|
{".htm", 4, "text/html"},
|
|
{".shtm", 5, "text/html"},
|
|
{".shtml", 6, "text/html"},
|
|
{".css", 4, "text/css"},
|
|
{".js", 3, "application/x-javascript"},
|
|
{".ico", 4, "image/x-icon"},
|
|
{".gif", 4, "image/gif"},
|
|
{".jpg", 4, "image/jpeg"},
|
|
{".jpeg", 5, "image/jpeg"},
|
|
{".png", 4, "image/png"},
|
|
{".svg", 4, "image/svg+xml"},
|
|
{".txt", 4, "text/plain"},
|
|
{".torrent", 8, "application/x-bittorrent"},
|
|
{".wav", 4, "audio/x-wav"},
|
|
{".mp3", 4, "audio/x-mp3"},
|
|
{".mid", 4, "audio/mid"},
|
|
{".m3u", 4, "audio/x-mpegurl"},
|
|
{".ogg", 4, "application/ogg"},
|
|
{".ram", 4, "audio/x-pn-realaudio"},
|
|
{".xml", 4, "text/xml"},
|
|
{".json", 5, "text/json"},
|
|
{".xslt", 5, "application/xml"},
|
|
{".xsl", 4, "application/xml"},
|
|
{".ra", 3, "audio/x-pn-realaudio"},
|
|
{".doc", 4, "application/msword"},
|
|
{".exe", 4, "application/octet-stream"},
|
|
{".zip", 4, "application/x-zip-compressed"},
|
|
{".xls", 4, "application/excel"},
|
|
{".tgz", 4, "application/x-tar-gz"},
|
|
{".tar", 4, "application/x-tar"},
|
|
{".gz", 3, "application/x-gunzip"},
|
|
{".arj", 4, "application/x-arj-compressed"},
|
|
{".rar", 4, "application/x-arj-compressed"},
|
|
{".rtf", 4, "application/rtf"},
|
|
{".pdf", 4, "application/pdf"},
|
|
{".swf", 4, "application/x-shockwave-flash"},
|
|
{".mpg", 4, "video/mpeg"},
|
|
{".webm", 5, "video/webm"},
|
|
{".mpeg", 5, "video/mpeg"},
|
|
{".mov", 4, "video/quicktime"},
|
|
{".mp4", 4, "video/mp4"},
|
|
{".m4v", 4, "video/x-m4v"},
|
|
{".asf", 4, "video/x-ms-asf"},
|
|
{".avi", 4, "video/x-msvideo"},
|
|
{".bmp", 4, "image/bmp"},
|
|
{".ttf", 4, "application/x-font-ttf"},
|
|
{NULL, 0, NULL}
|
|
};
|
|
|
|
const char *mg_get_builtin_mime_type(const char *path) {
|
|
const char *ext;
|
|
size_t i, path_len;
|
|
|
|
path_len = strlen(path);
|
|
|
|
for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
|
|
ext = path + (path_len - builtin_mime_types[i].ext_len);
|
|
if (path_len > builtin_mime_types[i].ext_len &&
|
|
mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
|
|
return builtin_mime_types[i].mime_type;
|
|
}
|
|
}
|
|
|
|
return "text/plain";
|
|
}
|
|
|
|
// Look at the "path" extension and figure what mime type it has.
|
|
// Store mime type in the vector.
|
|
static void get_mime_type(struct mg_context *ctx, const char *path,
|
|
struct vec *vec) {
|
|
struct vec ext_vec, mime_vec;
|
|
const char *list, *ext;
|
|
size_t path_len;
|
|
|
|
path_len = strlen(path);
|
|
|
|
// Scan user-defined mime types first, in case user wants to
|
|
// override default mime types.
|
|
list = ctx->config[EXTRA_MIME_TYPES];
|
|
while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
|
|
// ext now points to the path suffix
|
|
ext = path + path_len - ext_vec.len;
|
|
if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
|
|
*vec = mime_vec;
|
|
return;
|
|
}
|
|
}
|
|
|
|
vec->ptr = mg_get_builtin_mime_type(path);
|
|
vec->len = strlen(vec->ptr);
|
|
}
|
|
|
|
void mg_url_encode(const char *src, char *dst, size_t dst_len) {
|
|
static const char *dont_escape = "._-$,;~()";
|
|
static const char *hex = "0123456789abcdef";
|
|
const char *end = dst + dst_len - 1;
|
|
|
|
for (; *src != '\0' && dst < end; src++, dst++) {
|
|
if (isalnum(*(const unsigned char *) src) ||
|
|
strchr(dont_escape, * (const unsigned char *) src) != NULL) {
|
|
*dst = *src;
|
|
} else if (dst + 2 < end) {
|
|
dst[0] = '%';
|
|
dst[1] = hex[(* (const unsigned char *) src) >> 4];
|
|
dst[2] = hex[(* (const unsigned char *) src) & 0xf];
|
|
dst += 2;
|
|
}
|
|
}
|
|
|
|
*dst = '\0';
|
|
}
|
|
|
|
static void print_dir_entry(const struct de *de) {
|
|
char size[64], mod[64], href[PATH_MAX * 3];
|
|
const char *slash = de->file.is_directory ? "/" : "";
|
|
|
|
if (de->file.is_directory) {
|
|
mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]");
|
|
} else {
|
|
// We use (signed) cast below because MSVC 6 compiler cannot
|
|
// convert unsigned __int64 to double. Sigh.
|
|
if (de->file.size < 1024) {
|
|
mg_snprintf(size, sizeof(size), "%d", (int) de->file.size);
|
|
} else if (de->file.size < 0x100000) {
|
|
mg_snprintf(size, sizeof(size),
|
|
"%.1fk", (double) de->file.size / 1024.0);
|
|
} else if (de->file.size < 0x40000000) {
|
|
mg_snprintf(size, sizeof(size),
|
|
"%.1fM", (double) de->file.size / 1048576);
|
|
} else {
|
|
mg_snprintf(size, sizeof(size),
|
|
"%.1fG", (double) de->file.size / 1073741824);
|
|
}
|
|
}
|
|
strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M",
|
|
localtime(&de->file.modification_time));
|
|
mg_url_encode(de->file_name, href, sizeof(href));
|
|
de->conn->num_bytes_sent += mg_chunked_printf(de->conn,
|
|
"<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
|
|
"<td> %s</td><td> %s</td></tr>\n",
|
|
de->conn->request_info.uri, href, slash, de->file_name, slash, mod, size);
|
|
}
|
|
|
|
// This function is called from send_directory() and used for
|
|
// sorting directory entries by size, or name, or modification time.
|
|
// On windows, __cdecl specification is needed in case if project is built
|
|
// with __stdcall convention. qsort always requires __cdels callback.
|
|
static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
|
|
const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
|
|
const char *query_string = a->conn->request_info.query_string;
|
|
int cmp_result = 0;
|
|
|
|
if (query_string == NULL) {
|
|
query_string = "na";
|
|
}
|
|
|
|
if (a->file.is_directory && !b->file.is_directory) {
|
|
return -1; // Always put directories on top
|
|
} else if (!a->file.is_directory && b->file.is_directory) {
|
|
return 1; // Always put directories on top
|
|
} else if (*query_string == 'n') {
|
|
cmp_result = strcmp(a->file_name, b->file_name);
|
|
} else if (*query_string == 's') {
|
|
cmp_result = a->file.size == b->file.size ? 0 :
|
|
a->file.size > b->file.size ? 1 : -1;
|
|
} else if (*query_string == 'd') {
|
|
cmp_result = a->file.modification_time == b->file.modification_time ? 0 :
|
|
a->file.modification_time > b->file.modification_time ? 1 : -1;
|
|
}
|
|
|
|
return query_string[1] == 'd' ? -cmp_result : cmp_result;
|
|
}
|
|
|
|
static int must_hide_file(struct mg_connection *conn, const char *path) {
|
|
const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$";
|
|
const char *pattern = conn->ctx->config[HIDE_FILES];
|
|
return match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 ||
|
|
(pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0);
|
|
}
|
|
|
|
static int scan_directory(struct mg_connection *conn, const char *dir,
|
|
void *data, void (*cb)(struct de *, void *)) {
|
|
char path[PATH_MAX];
|
|
struct dirent *dp;
|
|
DIR *dirp;
|
|
struct de de;
|
|
|
|
if ((dirp = opendir(dir)) == NULL) {
|
|
return 0;
|
|
} else {
|
|
de.conn = conn;
|
|
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
// Do not show current dir and hidden files
|
|
if (!strcmp(dp->d_name, ".") ||
|
|
!strcmp(dp->d_name, "..") ||
|
|
must_hide_file(conn, dp->d_name)) {
|
|
continue;
|
|
}
|
|
|
|
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
|
|
|
|
// If we don't memset stat structure to zero, mtime will have
|
|
// garbage and strftime() will segfault later on in
|
|
// print_dir_entry(). memset is required only if mg_stat()
|
|
// fails. For more details, see
|
|
// http://code.google.com/p/mongoose/issues/detail?id=79
|
|
memset(&de.file, 0, sizeof(de.file));
|
|
mg_stat(path, &de.file);
|
|
|
|
de.file_name = dp->d_name;
|
|
cb(&de, data);
|
|
}
|
|
(void) closedir(dirp);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int remove_directory(struct mg_connection *conn, const char *dir) {
|
|
char path[PATH_MAX];
|
|
struct dirent *dp;
|
|
DIR *dirp;
|
|
struct de de;
|
|
|
|
if ((dirp = opendir(dir)) == NULL) {
|
|
return 0;
|
|
} else {
|
|
de.conn = conn;
|
|
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
// Do not show current dir, but show hidden files
|
|
if (!strcmp(dp->d_name, ".") ||
|
|
!strcmp(dp->d_name, "..")) {
|
|
continue;
|
|
}
|
|
|
|
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
|
|
|
|
// If we don't memset stat structure to zero, mtime will have
|
|
// garbage and strftime() will segfault later on in
|
|
// print_dir_entry(). memset is required only if mg_stat()
|
|
// fails. For more details, see
|
|
// http://code.google.com/p/mongoose/issues/detail?id=79
|
|
memset(&de.file, 0, sizeof(de.file));
|
|
mg_stat(path, &de.file);
|
|
if(de.file.modification_time) {
|
|
if(de.file.is_directory) {
|
|
remove_directory(conn, path);
|
|
} else {
|
|
mg_remove(path);
|
|
}
|
|
}
|
|
|
|
}
|
|
(void) closedir(dirp);
|
|
|
|
rmdir(dir);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
struct dir_scan_data {
|
|
struct de *entries;
|
|
int num_entries;
|
|
int arr_size;
|
|
};
|
|
|
|
// Behaves like realloc(), but frees original pointer on failure
|
|
static void *realloc2(void *ptr, size_t size) {
|
|
void *new_ptr = realloc(ptr, size);
|
|
if (new_ptr == NULL) {
|
|
free(ptr);
|
|
}
|
|
return new_ptr;
|
|
}
|
|
|
|
static void dir_scan_callback(struct de *de, void *data) {
|
|
struct dir_scan_data *dsd = (struct dir_scan_data *) data;
|
|
|
|
if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) {
|
|
dsd->arr_size *= 2;
|
|
dsd->entries = (struct de *) realloc2(dsd->entries, dsd->arr_size *
|
|
sizeof(dsd->entries[0]));
|
|
}
|
|
if (dsd->entries == NULL) {
|
|
// TODO(lsm): propagate an error to the caller
|
|
dsd->num_entries = 0;
|
|
} else {
|
|
dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
|
|
dsd->entries[dsd->num_entries].file = de->file;
|
|
dsd->entries[dsd->num_entries].conn = de->conn;
|
|
dsd->num_entries++;
|
|
}
|
|
}
|
|
|
|
static void handle_directory_request(struct mg_connection *conn,
|
|
const char *dir) {
|
|
int i, sort_direction;
|
|
struct dir_scan_data data = { NULL, 0, 128 };
|
|
|
|
if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
|
|
send_http_error(conn, 500, "Cannot open directory",
|
|
"Error: opendir(%s): %s", dir, strerror(ERRNO));
|
|
return;
|
|
}
|
|
|
|
sort_direction = conn->request_info.query_string != NULL &&
|
|
conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
|
|
|
|
conn->must_close = 1;
|
|
mg_printf(conn, "%s",
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Transfer-Encoding: Chunked\r\n"
|
|
"Content-Type: text/html; charset=utf-8\r\n\r\n");
|
|
|
|
conn->num_bytes_sent += mg_chunked_printf(conn,
|
|
"<html><head><title>Index of %s</title>"
|
|
"<style>th {text-align: left;}</style></head>"
|
|
"<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
|
|
"<tr><th><a href=\"?n%c\">Name</a></th>"
|
|
"<th><a href=\"?d%c\">Modified</a></th>"
|
|
"<th><a href=\"?s%c\">Size</a></th></tr>"
|
|
"<tr><td colspan=\"3\"><hr></td></tr>",
|
|
conn->request_info.uri, conn->request_info.uri,
|
|
sort_direction, sort_direction, sort_direction);
|
|
|
|
// Print first entry - link to a parent directory
|
|
conn->num_bytes_sent += mg_chunked_printf(conn,
|
|
"<tr><td><a href=\"%s%s\">%s</a></td>"
|
|
"<td> %s</td><td> %s</td></tr>\n",
|
|
conn->request_info.uri, "..", "Parent directory", "-", "-");
|
|
|
|
// Sort and print directory entries
|
|
qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
|
|
compare_dir_entries);
|
|
for (i = 0; i < data.num_entries; i++) {
|
|
print_dir_entry(&data.entries[i]);
|
|
free(data.entries[i].file_name);
|
|
}
|
|
free(data.entries);
|
|
|
|
conn->num_bytes_sent += mg_chunked_printf(conn, "%s",
|
|
"</table></body></html>");
|
|
conn->num_bytes_sent += mg_write(conn, "0\r\n\r\n", 5);
|
|
conn->status_code = 200;
|
|
}
|
|
|
|
// Send len bytes from the opened file to the client.
|
|
static void send_file_data(struct mg_connection *conn, FILE *fp,
|
|
int64_t offset, int64_t len) {
|
|
char buf[MG_BUF_LEN];
|
|
int num_read, num_written, to_read;
|
|
|
|
// If offset is beyond file boundaries, don't send anything
|
|
if (offset > 0 && fseeko(fp, offset, SEEK_SET) != 0) {
|
|
return;
|
|
}
|
|
|
|
while (len > 0) {
|
|
// Calculate how much to read from the file in the buffer
|
|
to_read = sizeof(buf);
|
|
if ((int64_t) to_read > len) {
|
|
to_read = (int) len;
|
|
}
|
|
|
|
// Read from file, exit the loop on error
|
|
if ((num_read = fread(buf, 1, (size_t) to_read, fp)) <= 0) {
|
|
break;
|
|
}
|
|
|
|
// Send read bytes to the client, exit the loop on error
|
|
if ((num_written = mg_write(conn, buf, (size_t) num_read)) != num_read) {
|
|
break;
|
|
}
|
|
|
|
// Both read and were successful, adjust counters
|
|
conn->num_bytes_sent += num_written;
|
|
len -= num_written;
|
|
}
|
|
}
|
|
|
|
static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
|
|
return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
|
|
}
|
|
|
|
static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
|
|
strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
|
|
}
|
|
|
|
static void construct_etag(char *buf, size_t buf_len,
|
|
const struct file *filep) {
|
|
snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"",
|
|
(unsigned long) filep->modification_time, filep->size);
|
|
}
|
|
|
|
static void fclose_on_exec(FILE *fp) {
|
|
if (fp != NULL) {
|
|
#ifndef _WIN32
|
|
fcntl(fileno(fp), F_SETFD, FD_CLOEXEC);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void handle_file_request(struct mg_connection *conn, const char *path,
|
|
struct file *filep) {
|
|
char date[64], lm[64], etag[64], range[64];
|
|
const char *msg = "OK", *hdr;
|
|
time_t curtime = time(NULL);
|
|
int64_t cl, r1, r2;
|
|
struct vec mime_vec;
|
|
int n;
|
|
char gz_path[PATH_MAX];
|
|
char const* encoding = "";
|
|
FILE *fp;
|
|
|
|
get_mime_type(conn->ctx, path, &mime_vec);
|
|
cl = filep->size;
|
|
conn->status_code = 200;
|
|
range[0] = '\0';
|
|
|
|
// if this file is in fact a pre-gzipped file, rewrite its filename
|
|
// it's important to rewrite the filename after resolving
|
|
// the mime type from it, to preserve the actual file's type
|
|
if (filep->gzipped) {
|
|
snprintf(gz_path, sizeof(gz_path), "%s.gz", path);
|
|
path = gz_path;
|
|
encoding = "Content-Encoding: gzip\r\n";
|
|
}
|
|
|
|
if ((fp = mg_fopen(path, "rb")) == NULL) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"fopen(%s): %s", path, strerror(ERRNO));
|
|
return;
|
|
}
|
|
|
|
fclose_on_exec(fp);
|
|
|
|
// If Range: header specified, act accordingly
|
|
r1 = r2 = 0;
|
|
hdr = mg_get_header(conn, "Range");
|
|
if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 &&
|
|
r1 >= 0 && r2 >= 0) {
|
|
// actually, range requests don't play well with a pre-gzipped
|
|
// file (since the range is specified in the uncmpressed space)
|
|
if (filep->gzipped) {
|
|
send_http_error(conn, 501, "Not Implemented",
|
|
"range requests in gzipped files are not supported");
|
|
return;
|
|
}
|
|
conn->status_code = 206;
|
|
cl = n == 2 ? (r2 > cl ? cl : r2) - r1 + 1: cl - r1;
|
|
mg_snprintf(range, sizeof(range),
|
|
"Content-Range: bytes "
|
|
"%" INT64_FMT "-%"
|
|
INT64_FMT "/%" INT64_FMT "\r\n",
|
|
r1, r1 + cl - 1, filep->size);
|
|
msg = "Partial Content";
|
|
}
|
|
|
|
// Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
|
|
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
|
|
gmt_time_string(date, sizeof(date), &curtime);
|
|
gmt_time_string(lm, sizeof(lm), &filep->modification_time);
|
|
construct_etag(etag, sizeof(etag), filep);
|
|
|
|
(void) mg_printf(conn,
|
|
"HTTP/1.1 %d %s\r\n"
|
|
"Date: %s\r\n"
|
|
"Last-Modified: %s\r\n"
|
|
"Etag: %s\r\n"
|
|
"Content-Type: %.*s\r\n"
|
|
"Content-Length: %" INT64_FMT "\r\n"
|
|
"Connection: %s\r\n"
|
|
"Accept-Ranges: bytes\r\n"
|
|
"%s%s%s\r\n",
|
|
conn->status_code, msg, date, lm, etag, (int) mime_vec.len,
|
|
mime_vec.ptr, cl, suggest_connection_header(conn), range, encoding,
|
|
EXTRA_HTTP_HEADERS);
|
|
|
|
if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
|
|
send_file_data(conn, fp, r1, cl);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
|
|
void mg_send_file(struct mg_connection *conn, const char *path) {
|
|
struct file file = STRUCT_FILE_INITIALIZER;
|
|
if (mg_stat(path, &file)) {
|
|
handle_file_request(conn, path, &file);
|
|
} else {
|
|
send_http_error(conn, 404, "Not Found", "%s", "File not found");
|
|
}
|
|
}
|
|
|
|
|
|
// Parse HTTP headers from the given buffer, advance buffer to the point
|
|
// where parsing stopped.
|
|
static void parse_http_headers(char **buf, struct mg_request_info *ri) {
|
|
int i;
|
|
|
|
for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
|
|
ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
|
|
ri->http_headers[i].value = skip(buf, "\r\n");
|
|
if (ri->http_headers[i].name[0] == '\0')
|
|
break;
|
|
ri->num_headers = i + 1;
|
|
}
|
|
}
|
|
|
|
static int is_valid_http_method(const char *method) {
|
|
return !strcmp(method, "GET") || !strcmp(method, "POST") ||
|
|
!strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
|
|
!strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
|
|
!strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND")
|
|
|| !strcmp(method, "MKCOL")
|
|
;
|
|
}
|
|
|
|
// Parse HTTP request, fill in mg_request_info structure.
|
|
// This function modifies the buffer by NUL-terminating
|
|
// HTTP request components, header names and header values.
|
|
static int parse_http_message(char *buf, int len, struct mg_request_info *ri) {
|
|
int is_request, request_length = get_request_len(buf, len);
|
|
if (request_length > 0) {
|
|
// Reset attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
|
|
ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL;
|
|
ri->num_headers = 0;
|
|
|
|
buf[request_length - 1] = '\0';
|
|
|
|
// RFC says that all initial whitespaces should be ingored
|
|
while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
|
|
buf++;
|
|
}
|
|
ri->request_method = skip(&buf, " ");
|
|
ri->uri = skip(&buf, " ");
|
|
ri->http_version = skip(&buf, "\r\n");
|
|
|
|
// HTTP message could be either HTTP request or HTTP response, e.g.
|
|
// "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..."
|
|
is_request = is_valid_http_method(ri->request_method);
|
|
if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) ||
|
|
(!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) {
|
|
request_length = -1;
|
|
} else {
|
|
if (is_request) {
|
|
ri->http_version += 5;
|
|
}
|
|
parse_http_headers(&buf, ri);
|
|
}
|
|
}
|
|
return request_length;
|
|
}
|
|
|
|
// Keep reading the input (either opened file descriptor fd, or socket sock,
|
|
// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
|
|
// buffer (which marks the end of HTTP request). Buffer buf may already
|
|
// have some data. The length of the data is stored in nread.
|
|
// Upon every read operation, increase nread by the number of bytes read.
|
|
static int read_request(FILE *fp, struct mg_connection *conn,
|
|
char *buf, int bufsiz, int *nread) {
|
|
int request_len, n = 0;
|
|
|
|
request_len = get_request_len(buf, *nread);
|
|
while (conn->ctx->stop_flag == 0 &&
|
|
*nread < bufsiz &&
|
|
request_len == 0 &&
|
|
(n = pull(fp, conn, buf + *nread, bufsiz - *nread)) > 0) {
|
|
*nread += n;
|
|
assert(*nread <= bufsiz);
|
|
request_len = get_request_len(buf, *nread);
|
|
}
|
|
|
|
return request_len <= 0 && n <= 0 ? -1 : request_len;
|
|
}
|
|
|
|
// For given directory path, substitute it to valid index file.
|
|
// Return 0 if index file has been found, -1 if not found.
|
|
// If the file is found, it's stats is returned in stp.
|
|
static int substitute_index_file(struct mg_connection *conn, char *path,
|
|
size_t path_len, struct file *filep) {
|
|
const char *list = conn->ctx->config[INDEX_FILES];
|
|
struct file file = STRUCT_FILE_INITIALIZER;
|
|
struct vec filename_vec;
|
|
size_t n = strlen(path);
|
|
int found = 0;
|
|
|
|
// The 'path' given to us points to the directory. Remove all trailing
|
|
// directory separator characters from the end of the path, and
|
|
// then append single directory separator character.
|
|
while (n > 0 && path[n - 1] == '/') {
|
|
n--;
|
|
}
|
|
path[n] = '/';
|
|
|
|
// Traverse index files list. For each entry, append it to the given
|
|
// path and see if the file exists. If it exists, break the loop
|
|
while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
|
|
|
|
// Ignore too long entries that may overflow path buffer
|
|
if (filename_vec.len > path_len - (n + 2))
|
|
continue;
|
|
|
|
// Prepare full path to the index file
|
|
mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
|
|
|
|
// Does it exist?
|
|
if (mg_stat(path, &file)) {
|
|
// Yes it does, break the loop
|
|
*filep = file;
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If no index file exists, restore directory path
|
|
if (!found) {
|
|
path[n] = '\0';
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
// Return True if we should reply 304 Not Modified.
|
|
static int is_not_modified(const struct mg_connection *conn,
|
|
const struct file *filep) {
|
|
char etag[64];
|
|
const char *ims = mg_get_header(conn, "If-Modified-Since");
|
|
const char *inm = mg_get_header(conn, "If-None-Match");
|
|
construct_etag(etag, sizeof(etag), filep);
|
|
return (inm != NULL && !mg_strcasecmp(etag, inm)) ||
|
|
(ims != NULL && filep->modification_time <= parse_date_string(ims));
|
|
}
|
|
|
|
static int forward_body_data(struct mg_connection *conn, FILE *fp,
|
|
SOCKET sock, SSL *ssl) {
|
|
const char *expect, *body;
|
|
char buf[MG_BUF_LEN];
|
|
int nread, buffered_len, success = 0;
|
|
int64_t left;
|
|
|
|
expect = mg_get_header(conn, "Expect");
|
|
assert(fp != NULL);
|
|
|
|
if (conn->content_len == INT64_MAX) {
|
|
send_http_error(conn, 411, "Length Required", "%s", "");
|
|
} else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
|
|
send_http_error(conn, 417, "Expectation Failed", "%s", "");
|
|
} else {
|
|
if (expect != NULL) {
|
|
(void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
|
|
}
|
|
|
|
buffered_len = conn->data_len - conn->request_len;
|
|
body = conn->buf + conn->request_len;
|
|
assert(buffered_len >= 0);
|
|
|
|
if (buffered_len > 0) {
|
|
if ((int64_t) buffered_len > conn->content_len) {
|
|
buffered_len = (int) conn->content_len;
|
|
}
|
|
push(fp, sock, ssl, body, (int64_t) buffered_len);
|
|
memmove((char *) body, body + buffered_len, buffered_len);
|
|
conn->data_len -= buffered_len;
|
|
}
|
|
|
|
nread = 0;
|
|
while (conn->num_bytes_read < conn->content_len + conn->request_len) {
|
|
left = left_to_read(conn);
|
|
if (left > (int64_t) sizeof(buf)) {
|
|
left = sizeof(buf);
|
|
}
|
|
nread = pull(NULL, conn, buf, (int) left);
|
|
if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (left_to_read(conn) == 0) {
|
|
success = nread >= 0;
|
|
}
|
|
|
|
// Each error code path in this function must send an error
|
|
if (!success) {
|
|
send_http_error(conn, 577, http_500_error, "%s", "");
|
|
}
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
#if !defined(NO_CGI)
|
|
// This structure helps to create an environment for the spawned CGI program.
|
|
// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
|
|
// last element must be NULL.
|
|
// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
|
|
// strings must reside in a contiguous buffer. The end of the buffer is
|
|
// marked by two '\0' characters.
|
|
// We satisfy both worlds: we create an envp array (which is vars), all
|
|
// entries are actually pointers inside buf.
|
|
struct cgi_env_block {
|
|
struct mg_connection *conn;
|
|
char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
|
|
int len; // Space taken
|
|
char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
|
|
int nvars; // Number of variables
|
|
};
|
|
|
|
static char *addenv(struct cgi_env_block *block,
|
|
PRINTF_FORMAT_STRING(const char *fmt), ...)
|
|
PRINTF_ARGS(2, 3);
|
|
|
|
// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
|
|
// pointer into the vars array.
|
|
static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
|
|
int n, space;
|
|
char *added;
|
|
va_list ap;
|
|
|
|
// Calculate how much space is left in the buffer
|
|
space = sizeof(block->buf) - block->len - 2;
|
|
assert(space >= 0);
|
|
|
|
// Make a pointer to the free space int the buffer
|
|
added = block->buf + block->len;
|
|
|
|
// Copy VARIABLE=VALUE\0 string into the free space
|
|
va_start(ap, fmt);
|
|
n = mg_vsnprintf(added, (size_t) space, fmt, ap);
|
|
va_end(ap);
|
|
|
|
// Make sure we do not overflow buffer and the envp array
|
|
if (n > 0 && n + 1 < space &&
|
|
block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
|
|
// Append a pointer to the added string into the envp array
|
|
block->vars[block->nvars++] = added;
|
|
// Bump up used length counter. Include \0 terminator
|
|
block->len += n + 1;
|
|
} else {
|
|
cry(block->conn, "%s: CGI env buffer truncated for [%s]", __func__, fmt);
|
|
}
|
|
|
|
return added;
|
|
}
|
|
|
|
static void prepare_cgi_environment(struct mg_connection *conn,
|
|
const char *prog,
|
|
struct cgi_env_block *blk) {
|
|
const struct mg_request_info *ri = &conn->request_info;
|
|
const char *s, *slash;
|
|
struct vec var_vec;
|
|
char *p, src_addr[IP_ADDR_STR_LEN];
|
|
int i;
|
|
|
|
blk->len = blk->nvars = 0;
|
|
blk->conn = conn;
|
|
sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
|
|
|
|
addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
|
|
addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
|
|
addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
|
|
addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", mg_version());
|
|
|
|
// Prepare the environment block
|
|
addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
|
|
addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
|
|
addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
|
|
|
|
// TODO(lsm): fix this for IPv6 case
|
|
addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port));
|
|
|
|
addenv(blk, "REQUEST_METHOD=%s", ri->request_method);
|
|
addenv(blk, "REMOTE_ADDR=%s", src_addr);
|
|
addenv(blk, "REMOTE_PORT=%d", ri->remote_port);
|
|
addenv(blk, "REQUEST_URI=%s%s%s", ri->uri,
|
|
ri->query_string == NULL ? "" : "?",
|
|
ri->query_string == NULL ? "" : ri->query_string);
|
|
|
|
// SCRIPT_NAME
|
|
if (conn->path_info != NULL) {
|
|
addenv(blk, "SCRIPT_NAME=%.*s",
|
|
(int) (strlen(ri->uri) - strlen(conn->path_info)), ri->uri);
|
|
addenv(blk, "PATH_INFO=%s", conn->path_info);
|
|
} else {
|
|
s = strrchr(prog, '/');
|
|
slash = strrchr(ri->uri, '/');
|
|
addenv(blk, "SCRIPT_NAME=%.*s%s",
|
|
slash == NULL ? 0 : (int) (slash - ri->uri), ri->uri,
|
|
s == NULL ? prog : s);
|
|
}
|
|
|
|
addenv(blk, "SCRIPT_FILENAME=%s", prog);
|
|
addenv(blk, "PATH_TRANSLATED=%s", prog);
|
|
addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
|
|
|
|
if ((s = mg_get_header(conn, "Content-Type")) != NULL)
|
|
addenv(blk, "CONTENT_TYPE=%s", s);
|
|
|
|
if (ri->query_string != NULL) {
|
|
addenv(blk, "QUERY_STRING=%s", ri->query_string);
|
|
}
|
|
|
|
if ((s = mg_get_header(conn, "Content-Length")) != NULL)
|
|
addenv(blk, "CONTENT_LENGTH=%s", s);
|
|
|
|
if ((s = getenv("PATH")) != NULL)
|
|
addenv(blk, "PATH=%s", s);
|
|
|
|
#if defined(_WIN32)
|
|
if ((s = getenv("COMSPEC")) != NULL) {
|
|
addenv(blk, "COMSPEC=%s", s);
|
|
}
|
|
if ((s = getenv("SYSTEMROOT")) != NULL) {
|
|
addenv(blk, "SYSTEMROOT=%s", s);
|
|
}
|
|
if ((s = getenv("SystemDrive")) != NULL) {
|
|
addenv(blk, "SystemDrive=%s", s);
|
|
}
|
|
if ((s = getenv("ProgramFiles")) != NULL) {
|
|
addenv(blk, "ProgramFiles=%s", s);
|
|
}
|
|
if ((s = getenv("ProgramFiles(x86)")) != NULL) {
|
|
addenv(blk, "ProgramFiles(x86)=%s", s);
|
|
}
|
|
if ((s = getenv("CommonProgramFiles(x86)")) != NULL) {
|
|
addenv(blk, "CommonProgramFiles(x86)=%s", s);
|
|
}
|
|
#else
|
|
if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
|
|
addenv(blk, "LD_LIBRARY_PATH=%s", s);
|
|
#endif // _WIN32
|
|
|
|
if ((s = getenv("PERLLIB")) != NULL)
|
|
addenv(blk, "PERLLIB=%s", s);
|
|
|
|
if (ri->remote_user != NULL) {
|
|
addenv(blk, "REMOTE_USER=%s", ri->remote_user);
|
|
addenv(blk, "%s", "AUTH_TYPE=Digest");
|
|
}
|
|
|
|
// Add all headers as HTTP_* variables
|
|
for (i = 0; i < ri->num_headers; i++) {
|
|
p = addenv(blk, "HTTP_%s=%s",
|
|
ri->http_headers[i].name, ri->http_headers[i].value);
|
|
|
|
// Convert variable name into uppercase, and change - to _
|
|
for (; *p != '=' && *p != '\0'; p++) {
|
|
if (*p == '-')
|
|
*p = '_';
|
|
*p = (char) toupper(* (unsigned char *) p);
|
|
}
|
|
}
|
|
|
|
// Add user-specified variables
|
|
s = conn->ctx->config[CGI_ENVIRONMENT];
|
|
while ((s = next_option(s, &var_vec, NULL)) != NULL) {
|
|
addenv(blk, "%.*s", (int) var_vec.len, var_vec.ptr);
|
|
}
|
|
|
|
blk->vars[blk->nvars++] = NULL;
|
|
blk->buf[blk->len++] = '\0';
|
|
|
|
assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
|
|
assert(blk->len > 0);
|
|
assert(blk->len < (int) sizeof(blk->buf));
|
|
}
|
|
|
|
static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
|
|
int headers_len, data_len, i, fdin[2], fdout[2];
|
|
const char *status, *status_text;
|
|
char buf[16384], *pbuf, dir[PATH_MAX], *p;
|
|
struct mg_request_info ri;
|
|
struct cgi_env_block blk;
|
|
FILE *in = NULL, *out = NULL;
|
|
pid_t pid = (pid_t) -1;
|
|
|
|
prepare_cgi_environment(conn, prog, &blk);
|
|
|
|
// CGI must be executed in its own directory. 'dir' must point to the
|
|
// directory containing executable program, 'p' must point to the
|
|
// executable program name relative to 'dir'.
|
|
(void) mg_snprintf(dir, sizeof(dir), "%s", prog);
|
|
if ((p = strrchr(dir, '/')) != NULL) {
|
|
*p++ = '\0';
|
|
} else {
|
|
dir[0] = '.', dir[1] = '\0';
|
|
p = (char *) prog;
|
|
}
|
|
|
|
if (pipe(fdin) != 0 || pipe(fdout) != 0) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"Cannot create CGI pipe: %s", strerror(ERRNO));
|
|
goto done;
|
|
}
|
|
|
|
pid = spawn_process(conn, p, blk.buf, blk.vars, fdin[0], fdout[1], dir);
|
|
if (pid == (pid_t) -1) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"Cannot spawn CGI process [%s]: %s", prog, strerror(ERRNO));
|
|
goto done;
|
|
}
|
|
|
|
// Make sure child closes all pipe descriptors. It must dup them to 0,1
|
|
set_close_on_exec(fdin[0]);
|
|
set_close_on_exec(fdin[1]);
|
|
set_close_on_exec(fdout[0]);
|
|
set_close_on_exec(fdout[1]);
|
|
|
|
// Parent closes only one side of the pipes.
|
|
// If we don't mark them as closed, close() attempt before
|
|
// return from this function throws an exception on Windows.
|
|
// Windows does not like when closed descriptor is closed again.
|
|
(void) close(fdin[0]);
|
|
(void) close(fdout[1]);
|
|
fdin[0] = fdout[1] = -1;
|
|
|
|
|
|
if ((in = fdopen(fdin[1], "wb")) == NULL ||
|
|
(out = fdopen(fdout[0], "rb")) == NULL) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"fopen: %s", strerror(ERRNO));
|
|
goto done;
|
|
}
|
|
|
|
setbuf(in, NULL);
|
|
setbuf(out, NULL);
|
|
|
|
// Send POST data to the CGI process if needed
|
|
if (!strcmp(conn->request_info.request_method, "POST") &&
|
|
!forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
|
|
goto done;
|
|
}
|
|
|
|
// Close so child gets an EOF.
|
|
fclose(in);
|
|
in = NULL;
|
|
fdin[1] = -1;
|
|
|
|
// Now read CGI reply into a buffer. We need to set correct
|
|
// status code, thus we need to see all HTTP headers first.
|
|
// Do not send anything back to client, until we buffer in all
|
|
// HTTP headers.
|
|
data_len = 0;
|
|
headers_len = read_request(out, conn, buf, sizeof(buf), &data_len);
|
|
if (headers_len <= 0) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"CGI program sent malformed or too big (>%u bytes) "
|
|
"HTTP headers: [%.*s]",
|
|
(unsigned) sizeof(buf), data_len, buf);
|
|
goto done;
|
|
}
|
|
pbuf = buf;
|
|
buf[headers_len - 1] = '\0';
|
|
parse_http_headers(&pbuf, &ri);
|
|
|
|
// Make up and send the status line
|
|
status_text = "OK";
|
|
if ((status = get_header(&ri, "Status")) != NULL) {
|
|
conn->status_code = atoi(status);
|
|
status_text = status;
|
|
while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') {
|
|
status_text++;
|
|
}
|
|
} else if (get_header(&ri, "Location") != NULL) {
|
|
conn->status_code = 302;
|
|
} else {
|
|
conn->status_code = 200;
|
|
}
|
|
if (get_header(&ri, "Connection") != NULL &&
|
|
!mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) {
|
|
conn->must_close = 1;
|
|
}
|
|
(void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->status_code,
|
|
status_text);
|
|
|
|
// Send headers
|
|
for (i = 0; i < ri.num_headers; i++) {
|
|
mg_printf(conn, "%s: %s\r\n",
|
|
ri.http_headers[i].name, ri.http_headers[i].value);
|
|
}
|
|
mg_write(conn, "\r\n", 2);
|
|
|
|
// Send chunk of data that may have been read after the headers
|
|
conn->num_bytes_sent += mg_write(conn, buf + headers_len,
|
|
(size_t)(data_len - headers_len));
|
|
|
|
// Read the rest of CGI output and send to the client
|
|
send_file_data(conn, out, 0, INT64_MAX);
|
|
|
|
done:
|
|
if (pid != (pid_t) -1) {
|
|
kill(pid, SIGKILL);
|
|
}
|
|
if (fdin[0] != -1) {
|
|
close(fdin[0]);
|
|
}
|
|
if (fdout[1] != -1) {
|
|
close(fdout[1]);
|
|
}
|
|
|
|
if (in != NULL) {
|
|
fclose(in);
|
|
} else if (fdin[1] != -1) {
|
|
close(fdin[1]);
|
|
}
|
|
|
|
if (out != NULL) {
|
|
fclose(out);
|
|
} else if (fdout[0] != -1) {
|
|
close(fdout[0]);
|
|
}
|
|
}
|
|
#endif // !NO_CGI
|
|
|
|
// For a given PUT path, create all intermediate subdirectories
|
|
// for given path. Return 0 if the path itself is a directory,
|
|
// or -1 on error, 1 if OK.
|
|
static int put_dir(const char *path) {
|
|
char buf[PATH_MAX];
|
|
const char *s, *p;
|
|
struct file file = STRUCT_FILE_INITIALIZER;
|
|
int len, res = 1;
|
|
|
|
for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) {
|
|
len = p - path;
|
|
if (len >= (int) sizeof(buf)) {
|
|
res = -1;
|
|
break;
|
|
}
|
|
memcpy(buf, path, len);
|
|
buf[len] = '\0';
|
|
|
|
// Try to create intermediate directory
|
|
DEBUG_TRACE(("mkdir(%s)", buf));
|
|
if (!mg_stat(buf, &file) && mg_mkdir(buf, 0755) != 0) {
|
|
res = -1;
|
|
break;
|
|
}
|
|
|
|
// Is path itself a directory?
|
|
if (p[1] == '\0') {
|
|
res = 0;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void mkcol(struct mg_connection *conn, const char *path) {
|
|
int rc, body_len;
|
|
struct de de;
|
|
|
|
memset(&de.file, 0, sizeof(de.file));
|
|
mg_stat(path, &de.file);
|
|
|
|
if (de.file.modification_time) {
|
|
send_http_error(conn, 405, "Method Not Allowed",
|
|
"mkcol(%s): %s", path, strerror(ERRNO));
|
|
return;
|
|
}
|
|
|
|
body_len = conn->data_len - conn->request_len;
|
|
if(body_len > 0) {
|
|
send_http_error(conn, 415, "Unsupported media type",
|
|
"mkcol(%s): %s", path, strerror(ERRNO));
|
|
return;
|
|
}
|
|
|
|
rc = mg_mkdir(path, 0755);
|
|
|
|
if (rc == 0) {
|
|
conn->status_code = 201;
|
|
mg_printf(conn, "HTTP/1.1 %d Created\r\n\r\n", conn->status_code);
|
|
} else if (rc == -1) {
|
|
if(errno == EEXIST)
|
|
send_http_error(conn, 405, "Method Not Allowed",
|
|
"mkcol(%s): %s", path, strerror(ERRNO));
|
|
else if(errno == EACCES)
|
|
send_http_error(conn, 403, "Forbidden",
|
|
"mkcol(%s): %s", path, strerror(ERRNO));
|
|
else if(errno == ENOENT)
|
|
send_http_error(conn, 409, "Conflict",
|
|
"mkcol(%s): %s", path, strerror(ERRNO));
|
|
else
|
|
send_http_error(conn, 500, http_500_error,
|
|
"fopen(%s): %s", path, strerror(ERRNO));
|
|
}
|
|
}
|
|
|
|
static void put_file(struct mg_connection *conn, const char *path) {
|
|
struct file file = STRUCT_FILE_INITIALIZER;
|
|
FILE *fp;
|
|
const char *range;
|
|
int64_t r1, r2;
|
|
int rc;
|
|
|
|
conn->status_code = mg_stat(path, &file) ? 200 : 201;
|
|
|
|
if ((rc = put_dir(path)) == 0) {
|
|
mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->status_code);
|
|
} else if (rc == -1) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"put_dir(%s): %s", path, strerror(ERRNO));
|
|
} else if ((fp = mg_fopen(path, "wb+")) == NULL) {
|
|
fclose(fp);
|
|
send_http_error(conn, 500, http_500_error,
|
|
"fopen(%s): %s", path, strerror(ERRNO));
|
|
} else {
|
|
fclose_on_exec(fp);
|
|
range = mg_get_header(conn, "Content-Range");
|
|
r1 = r2 = 0;
|
|
if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
|
|
conn->status_code = 206;
|
|
fseeko(fp, r1, SEEK_SET);
|
|
}
|
|
if (!forward_body_data(conn, fp, INVALID_SOCKET, NULL)) {
|
|
conn->status_code = 500;
|
|
}
|
|
mg_printf(conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n",
|
|
conn->status_code);
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
|
|
static void do_ssi_include(struct mg_connection *conn, const char *ssi,
|
|
char *tag, int include_level) {
|
|
char file_name[MG_BUF_LEN], path[PATH_MAX], *p;
|
|
FILE *fp;
|
|
|
|
// sscanf() is safe here, since send_ssi_file() also uses buffer
|
|
// of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
|
|
if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
|
|
// File name is relative to the webserver root
|
|
(void) mg_snprintf(path, sizeof(path), "%s%c%s",
|
|
conn->ctx->config[DOCUMENT_ROOT], '/', file_name);
|
|
} else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) {
|
|
// File name is relative to the webserver working directory
|
|
// or it is absolute system path
|
|
(void) mg_snprintf(path, sizeof(path), "%s", file_name);
|
|
} else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 ||
|
|
sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
|
|
// File name is relative to the currect document
|
|
(void) mg_snprintf(path, sizeof(path), "%s", ssi);
|
|
if ((p = strrchr(path, '/')) != NULL) {
|
|
p[1] = '\0';
|
|
}
|
|
(void) mg_snprintf(path + strlen(path),
|
|
sizeof(path) - strlen(path), "%s", file_name);
|
|
} else {
|
|
cry(conn, "Bad SSI #include: [%s]", tag);
|
|
return;
|
|
}
|
|
|
|
if ((fp = mg_fopen(path, "rb")) == NULL) {
|
|
cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
|
|
tag, path, strerror(ERRNO));
|
|
} else {
|
|
fclose_on_exec(fp);
|
|
if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
|
|
strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) {
|
|
send_ssi_file(conn, path, fp, include_level + 1);
|
|
} else {
|
|
send_file_data(conn, fp, 0, INT64_MAX);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
#if !defined(NO_POPEN)
|
|
static void do_ssi_exec(struct mg_connection *conn, char *tag) {
|
|
char cmd[MG_BUF_LEN];
|
|
FILE *fp;
|
|
|
|
if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
|
|
cry(conn, "Bad SSI #exec: [%s]", tag);
|
|
} else if ((fp = popen(cmd, "r")) == NULL) {
|
|
cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
|
|
} else {
|
|
send_file_data(conn, fp, 0, INT64_MAX);
|
|
pclose(fp);
|
|
}
|
|
}
|
|
#endif // !NO_POPEN
|
|
|
|
static void send_ssi_file(struct mg_connection *conn, const char *path,
|
|
FILE *fp, int include_level) {
|
|
char buf[MG_BUF_LEN];
|
|
int ch, offset, len, in_ssi_tag;
|
|
|
|
if (include_level > 10) {
|
|
cry(conn, "SSI #include level is too deep (%s)", path);
|
|
return;
|
|
}
|
|
|
|
in_ssi_tag = len = offset = 0;
|
|
while ((ch = fgetc(fp)) != EOF) {
|
|
if (in_ssi_tag && ch == '>') {
|
|
in_ssi_tag = 0;
|
|
buf[len++] = (char) ch;
|
|
buf[len] = '\0';
|
|
assert(len <= (int) sizeof(buf));
|
|
if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
|
|
// Not an SSI tag, pass it
|
|
(void) mg_write(conn, buf, (size_t) len);
|
|
} else {
|
|
if (!memcmp(buf + 5, "include", 7)) {
|
|
do_ssi_include(conn, path, buf + 12, include_level);
|
|
#if !defined(NO_POPEN)
|
|
} else if (!memcmp(buf + 5, "exec", 4)) {
|
|
do_ssi_exec(conn, buf + 9);
|
|
#endif // !NO_POPEN
|
|
} else {
|
|
cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
|
|
}
|
|
}
|
|
len = 0;
|
|
} else if (in_ssi_tag) {
|
|
if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
|
|
// Not an SSI tag
|
|
in_ssi_tag = 0;
|
|
} else if (len == (int) sizeof(buf) - 2) {
|
|
cry(conn, "%s: SSI tag is too large", path);
|
|
len = 0;
|
|
}
|
|
buf[len++] = ch & 0xff;
|
|
} else if (ch == '<') {
|
|
in_ssi_tag = 1;
|
|
if (len > 0) {
|
|
mg_write(conn, buf, (size_t) len);
|
|
}
|
|
len = 0;
|
|
buf[len++] = ch & 0xff;
|
|
} else {
|
|
buf[len++] = ch & 0xff;
|
|
if (len == (int) sizeof(buf)) {
|
|
mg_write(conn, buf, (size_t) len);
|
|
len = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Send the rest of buffered data
|
|
if (len > 0) {
|
|
mg_write(conn, buf, (size_t) len);
|
|
}
|
|
}
|
|
|
|
static void handle_ssi_file_request(struct mg_connection *conn,
|
|
const char *path) {
|
|
struct vec mime_vec;
|
|
FILE *fp;
|
|
|
|
if ((fp = mg_fopen(path, "rb")) == NULL) {
|
|
send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
|
|
strerror(ERRNO));
|
|
} else {
|
|
conn->must_close = 1;
|
|
fclose_on_exec(fp);
|
|
get_mime_type(conn->ctx, path, &mime_vec);
|
|
mg_printf(conn, "HTTP/1.1 200 OK\r\n"
|
|
"Content-Type: %.*s\r\n"
|
|
"Connection: close\r\n\r\n",
|
|
(int) mime_vec.len, mime_vec.ptr);
|
|
send_ssi_file(conn, path, fp, 0);
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
static void handle_options_request(struct mg_connection *conn) {
|
|
static const char reply[] = "HTTP/1.1 200 OK\r\n"
|
|
"Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS, PROPFIND, MKCOL\r\n"
|
|
"DAV: 1\r\n\r\n";
|
|
|
|
conn->status_code = 200;
|
|
mg_write(conn, reply, sizeof(reply) - 1);
|
|
}
|
|
|
|
// Writes PROPFIND properties for a collection element
|
|
static void print_props(struct mg_connection *conn, const char* uri,
|
|
struct file *filep) {
|
|
char mtime[64];
|
|
gmt_time_string(mtime, sizeof(mtime), &filep->modification_time);
|
|
conn->num_bytes_sent += mg_printf(conn,
|
|
"<d:response>"
|
|
"<d:href>%s</d:href>"
|
|
"<d:propstat>"
|
|
"<d:prop>"
|
|
"<d:resourcetype>%s</d:resourcetype>"
|
|
"<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
|
|
"<d:getlastmodified>%s</d:getlastmodified>"
|
|
"</d:prop>"
|
|
"<d:status>HTTP/1.1 200 OK</d:status>"
|
|
"</d:propstat>"
|
|
"</d:response>\n",
|
|
uri,
|
|
filep->is_directory ? "<d:collection/>" : "",
|
|
filep->size,
|
|
mtime);
|
|
}
|
|
|
|
static void print_dav_dir_entry(struct de *de, void *data) {
|
|
char href[PATH_MAX];
|
|
char href_encoded[PATH_MAX];
|
|
struct mg_connection *conn = (struct mg_connection *) data;
|
|
mg_snprintf(href, sizeof(href), "%s%s",
|
|
conn->request_info.uri, de->file_name);
|
|
mg_url_encode(href, href_encoded, PATH_MAX-1);
|
|
print_props(conn, href_encoded, &de->file);
|
|
}
|
|
|
|
static void handle_propfind(struct mg_connection *conn, const char *path,
|
|
struct file *filep) {
|
|
const char *depth = mg_get_header(conn, "Depth");
|
|
|
|
conn->must_close = 1;
|
|
conn->status_code = 207;
|
|
mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n"
|
|
"Connection: close\r\n"
|
|
"Content-Type: text/xml; charset=utf-8\r\n\r\n");
|
|
|
|
conn->num_bytes_sent += mg_printf(conn,
|
|
"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
|
|
"<d:multistatus xmlns:d='DAV:'>\n");
|
|
|
|
// Print properties for the requested resource itself
|
|
print_props(conn, conn->request_info.uri, filep);
|
|
|
|
// If it is a directory, print directory entries too if Depth is not 0
|
|
if (filep->is_directory &&
|
|
!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") &&
|
|
(depth == NULL || strcmp(depth, "0") != 0)) {
|
|
scan_directory(conn, path, conn, &print_dav_dir_entry);
|
|
}
|
|
|
|
conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>");
|
|
}
|
|
|
|
#if defined(USE_WEBSOCKET)
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// START OF SHA-1 code
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// Copyright(c) By Steve Reid <steve@edmweb.com>
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#define SHA1HANDSOFF
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#if defined(__sun)
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#include "solarisfixes.h"
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#endif
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union char64long16 { unsigned char c[64]; uint32_t l[16]; };
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#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
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static uint32_t blk0(union char64long16 *block, int i) {
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// Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN
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if (!is_big_endian()) {
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block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) |
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(rol(block->l[i], 8) & 0x00FF00FF);
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}
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return block->l[i];
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}
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#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
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^block->l[(i+2)&15]^block->l[i&15],1))
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#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
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#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
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#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
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typedef struct {
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uint32_t state[5];
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uint32_t count[2];
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unsigned char buffer[64];
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} SHA1_CTX;
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static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) {
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uint32_t a, b, c, d, e;
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union char64long16 block[1];
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memcpy(block, buffer, 64);
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
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R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
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R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
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R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
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R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
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R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
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R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
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R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
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R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
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R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
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R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
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R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
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R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
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R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
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R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
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R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
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R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
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R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
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R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
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R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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state[4] += e;
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a = b = c = d = e = 0;
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memset(block, '\0', sizeof(block));
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}
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static void SHA1Init(SHA1_CTX* context) {
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context->state[0] = 0x67452301;
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context->state[1] = 0xEFCDAB89;
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context->state[2] = 0x98BADCFE;
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context->state[3] = 0x10325476;
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context->state[4] = 0xC3D2E1F0;
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context->count[0] = context->count[1] = 0;
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}
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static void SHA1Update(SHA1_CTX* context, const unsigned char* data,
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uint32_t len) {
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uint32_t i, j;
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j = context->count[0];
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if ((context->count[0] += len << 3) < j)
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context->count[1]++;
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context->count[1] += (len>>29);
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j = (j >> 3) & 63;
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if ((j + len) > 63) {
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memcpy(&context->buffer[j], data, (i = 64-j));
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SHA1Transform(context->state, context->buffer);
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for ( ; i + 63 < len; i += 64) {
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SHA1Transform(context->state, &data[i]);
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}
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j = 0;
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}
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else i = 0;
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memcpy(&context->buffer[j], &data[i], len - i);
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}
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static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) {
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unsigned i;
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unsigned char finalcount[8], c;
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for (i = 0; i < 8; i++) {
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finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
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>> ((3-(i & 3)) * 8) ) & 255);
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}
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c = 0200;
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SHA1Update(context, &c, 1);
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while ((context->count[0] & 504) != 448) {
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c = 0000;
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SHA1Update(context, &c, 1);
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}
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SHA1Update(context, finalcount, 8);
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for (i = 0; i < 20; i++) {
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digest[i] = (unsigned char)
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((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
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}
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memset(context, '\0', sizeof(*context));
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memset(&finalcount, '\0', sizeof(finalcount));
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}
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// END OF SHA1 CODE
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static void base64_encode(const unsigned char *src, int src_len, char *dst) {
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static const char *b64 =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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int i, j, a, b, c;
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for (i = j = 0; i < src_len; i += 3) {
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a = src[i];
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b = i + 1 >= src_len ? 0 : src[i + 1];
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c = i + 2 >= src_len ? 0 : src[i + 2];
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dst[j++] = b64[a >> 2];
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dst[j++] = b64[((a & 3) << 4) | (b >> 4)];
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if (i + 1 < src_len) {
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dst[j++] = b64[(b & 15) << 2 | (c >> 6)];
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}
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if (i + 2 < src_len) {
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dst[j++] = b64[c & 63];
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}
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}
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while (j % 4 != 0) {
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dst[j++] = '=';
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}
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dst[j++] = '\0';
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}
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void mg_websocket_handshake(struct mg_connection *conn) {
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static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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char buf[100], sha[20], b64_sha[sizeof(sha) * 2];
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SHA1_CTX sha_ctx;
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mg_snprintf(buf, sizeof(buf), "%s%s",
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mg_get_header(conn, "Sec-WebSocket-Key"), magic);
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SHA1Init(&sha_ctx);
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SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf));
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SHA1Final((unsigned char *) sha, &sha_ctx);
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base64_encode((unsigned char *) sha, sizeof(sha), b64_sha);
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mg_printf(conn, "%s%s%s",
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"HTTP/1.1 101 Switching Protocols\r\n"
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"Upgrade: websocket\r\n"
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"Connection: Upgrade\r\n"
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"Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n");
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}
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int mg_websocket_read(struct mg_connection *conn, int *bits, char **data) {
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// Pointer to the beginning of the portion of the incoming websocket message
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// queue. The original websocket upgrade request is never removed,
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// so the queue begins after it.
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unsigned char *buf = (unsigned char *) conn->buf + conn->request_len;
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int n, stop = 0;
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size_t i, len, mask_len, data_len, header_len, body_len;
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char mask[4];
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assert(conn->content_len == 0);
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// Loop continuously, reading messages from the socket, invoking the callback,
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// and waiting repeatedly until an error occurs.
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while (!stop) {
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header_len = 0;
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// body_len is the length of the entire queue in bytes
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// len is the length of the current message
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// data_len is the length of the current message's data payload
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// header_len is the length of the current message's header
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if ((body_len = conn->data_len - conn->request_len) >= 2) {
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len = buf[1] & 127;
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mask_len = buf[1] & 128 ? 4 : 0;
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if (len < 126 && body_len >= mask_len) {
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data_len = len;
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header_len = 2 + mask_len;
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} else if (len == 126 && body_len >= 4 + mask_len) {
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header_len = 4 + mask_len;
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data_len = ((((int) buf[2]) << 8) + buf[3]);
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} else if (body_len >= 10 + mask_len) {
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header_len = 10 + mask_len;
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data_len = (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) +
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htonl(* (uint32_t *) &buf[6]);
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}
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}
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// Data layout is as follows:
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// conn->buf buf
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// v v frame1 | frame2
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// |---------------------|----------------|--------------|-------
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// | |<--header_len-->|<--data_len-->|
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// |<-conn->request_len->|<-----body_len----------->|
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// |<-------------------conn->data_len------------->|
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if (header_len > 0) {
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// Allocate space to hold websocket payload
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if ((*data = malloc(data_len)) == NULL) {
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// Allocation failed, exit the loop and then close the connection
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// TODO: notify user about the failure
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data_len = 0;
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break;
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}
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// Save mask and bits, otherwise it may be clobbered by memmove below
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*bits = buf[0];
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memcpy(mask, buf + header_len - mask_len, mask_len);
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// Read frame payload into the allocated buffer.
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assert(body_len >= header_len);
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if (data_len + header_len > body_len) {
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len = body_len - header_len;
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memcpy(*data, buf + header_len, len);
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// TODO: handle pull error
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pull_all(NULL, conn, *data + len, data_len - len);
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conn->data_len = conn->request_len;
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} else {
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len = data_len + header_len;
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memcpy(*data, buf + header_len, data_len);
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memmove(buf, buf + len, body_len - len);
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conn->data_len -= len;
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}
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// Apply mask if necessary
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if (mask_len > 0) {
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for (i = 0; i < data_len; i++) {
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(*data)[i] ^= mask[i % 4];
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}
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}
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return data_len;
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} else {
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// Buffering websocket request
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if ((n = pull(NULL, conn, conn->buf + conn->data_len,
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conn->buf_size - conn->data_len)) <= 0) {
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break;
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}
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conn->data_len += n;
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}
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}
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return 0;
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}
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int mg_websocket_write(struct mg_connection* conn, int opcode,
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const char *data, size_t data_len) {
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unsigned char *copy;
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size_t copy_len = 0;
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int retval = -1;
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if ((copy = (unsigned char *) malloc(data_len + 10)) == NULL) {
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return -1;
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}
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copy[0] = 0x80 + (opcode & 0x0f);
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// Frame format: http://tools.ietf.org/html/rfc6455#section-5.2
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if (data_len < 126) {
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// Inline 7-bit length field
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copy[1] = data_len;
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memcpy(copy + 2, data, data_len);
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copy_len = 2 + data_len;
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} else if (data_len <= 0xFFFF) {
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// 16-bit length field
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copy[1] = 126;
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* (uint16_t *) (copy + 2) = htons(data_len);
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memcpy(copy + 4, data, data_len);
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copy_len = 4 + data_len;
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} else {
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// 64-bit length field
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copy[1] = 127;
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* (uint32_t *) (copy + 2) = htonl((uint64_t) data_len >> 32);
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* (uint32_t *) (copy + 6) = htonl(data_len & 0xffffffff);
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memcpy(copy + 10, data, data_len);
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copy_len = 10 + data_len;
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}
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// Not thread safe
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if (copy_len > 0) {
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retval = mg_write(conn, copy, copy_len);
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}
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free(copy);
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return retval;
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}
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#endif // !USE_WEBSOCKET
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static int isbyte(int n) {
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return n >= 0 && n <= 255;
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}
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static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) {
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int n, a, b, c, d, slash = 32, len = 0;
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if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 ||
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sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) &&
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isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) &&
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slash >= 0 && slash < 33) {
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len = n;
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*net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d;
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*mask = slash ? 0xffffffffU << (32 - slash) : 0;
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}
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return len;
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}
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static int set_throttle(const char *spec, uint32_t remote_ip, const char *uri) {
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int throttle = 0;
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struct vec vec, val;
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uint32_t net, mask;
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char mult;
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double v;
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while ((spec = next_option(spec, &vec, &val)) != NULL) {
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mult = ',';
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if (sscanf(val.ptr, "%lf%c", &v, &mult) < 1 || v < 0 ||
|
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(lowercase(&mult) != 'k' && lowercase(&mult) != 'm' && mult != ',')) {
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continue;
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}
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v *= lowercase(&mult) == 'k' ? 1024 : lowercase(&mult) == 'm' ? 1048576 : 1;
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if (vec.len == 1 && vec.ptr[0] == '*') {
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throttle = (int) v;
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} else if (parse_net(vec.ptr, &net, &mask) > 0) {
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if ((remote_ip & mask) == net) {
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throttle = (int) v;
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}
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} else if (match_prefix(vec.ptr, vec.len, uri) > 0) {
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throttle = (int) v;
|
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}
|
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}
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return throttle;
|
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}
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|
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static uint32_t get_remote_ip(const struct mg_connection *conn) {
|
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return ntohl(* (uint32_t *) &conn->client.rsa.sin.sin_addr);
|
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}
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|
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FILE *mg_upload(struct mg_connection *conn, const char *destination_dir,
|
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char *path, int path_len) {
|
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const char *content_type_header, *boundary_start;
|
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char *buf, fname[1024], boundary[100], *s;
|
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int bl, n, i, j, headers_len, boundary_len, eof, buf_len, to_read, len = 0;
|
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FILE *fp;
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|
|
// Request looks like this:
|
|
//
|
|
// POST /upload HTTP/1.1
|
|
// Host: 127.0.0.1:8080
|
|
// Content-Length: 244894
|
|
// Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryRVr
|
|
//
|
|
// ------WebKitFormBoundaryRVr
|
|
// Content-Disposition: form-data; name="file"; filename="accum.png"
|
|
// Content-Type: image/png
|
|
//
|
|
// <89>PNG
|
|
// <PNG DATA>
|
|
// ------WebKitFormBoundaryRVr
|
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|
|
// Extract boundary string from the Content-Type header
|
|
if ((content_type_header = mg_get_header(conn, "Content-Type")) == NULL ||
|
|
(boundary_start = mg_strcasestr(content_type_header,
|
|
"boundary=")) == NULL ||
|
|
(sscanf(boundary_start, "boundary=\"%99[^\"]\"", boundary) == 0 &&
|
|
sscanf(boundary_start, "boundary=%99s", boundary) == 0) ||
|
|
boundary[0] == '\0') {
|
|
return NULL;
|
|
}
|
|
|
|
boundary_len = strlen(boundary);
|
|
bl = boundary_len + 4; // \r\n--<boundary>
|
|
|
|
// buf
|
|
// conn->buf |<--------- buf_len ------>|
|
|
// |=================|==========|===============|
|
|
// |<--request_len-->|<--len--->| |
|
|
// |<-----------data_len------->| conn->buf + conn->buf_size
|
|
|
|
buf = conn->buf + conn->request_len;
|
|
buf_len = conn->buf_size - conn->request_len;
|
|
len = conn->data_len - conn->request_len;
|
|
|
|
for (;;) {
|
|
// Pull in headers
|
|
assert(len >= 0 && len <= buf_len);
|
|
to_read = buf_len - len;
|
|
if (to_read > left_to_read(conn)) {
|
|
to_read = (int) left_to_read(conn);
|
|
}
|
|
while (len < buf_len &&
|
|
(n = pull(NULL, conn, buf + len, to_read)) > 0) {
|
|
len += n;
|
|
}
|
|
if ((headers_len = get_request_len(buf, len)) <= 0) {
|
|
break;
|
|
}
|
|
|
|
// Fetch file name.
|
|
fname[0] = '\0';
|
|
for (i = j = 0; i < headers_len; i++) {
|
|
if (buf[i] == '\r' && buf[i + 1] == '\n') {
|
|
buf[i] = buf[i + 1] = '\0';
|
|
// TODO(lsm): don't expect filename to be the 3rd field,
|
|
// parse the header properly instead.
|
|
sscanf(&buf[j], "Content-Disposition: %*s %*s filename=\"%1023[^\"]",
|
|
fname);
|
|
j = i + 2;
|
|
}
|
|
}
|
|
|
|
// Give up if the headers are not what we expect
|
|
if (fname[0] == '\0') {
|
|
break;
|
|
}
|
|
|
|
// Move data to the beginning of the buffer
|
|
assert(len >= headers_len);
|
|
memmove(buf, &buf[headers_len], len - headers_len);
|
|
len -= headers_len;
|
|
conn->data_len = conn->request_len + len;
|
|
|
|
// We open the file with exclusive lock held. This guarantee us
|
|
// there is no other thread can save into the same file simultaneously.
|
|
fp = NULL;
|
|
|
|
// Construct destination file name. Do not allow paths to have slashes.
|
|
if ((s = strrchr(fname, '/')) == NULL &&
|
|
(s = strrchr(fname, '\\')) == NULL) {
|
|
s = fname;
|
|
}
|
|
|
|
// Open file in binary mode. TODO: set an exclusive lock.
|
|
snprintf(path, path_len, "%s/%s", destination_dir, s);
|
|
if ((fp = fopen(path, "wb")) == NULL) {
|
|
break;
|
|
}
|
|
|
|
// Read POST data, write into file until boundary is found.
|
|
eof = n = 0;
|
|
do {
|
|
len += n;
|
|
for (i = 0; i < len - bl; i++) {
|
|
if (!memcmp(&buf[i], "\r\n--", 4) &&
|
|
!memcmp(&buf[i + 4], boundary, boundary_len)) {
|
|
// Found boundary, that's the end of file data.
|
|
fwrite(buf, 1, i, fp);
|
|
eof = 1;
|
|
memmove(buf, &buf[i + bl], len - (i + bl));
|
|
len -= i + bl;
|
|
break;
|
|
}
|
|
}
|
|
if (!eof && len > bl) {
|
|
fwrite(buf, 1, len - bl, fp);
|
|
memmove(buf, &buf[len - bl], bl);
|
|
len = bl;
|
|
}
|
|
to_read = buf_len - len;
|
|
if (to_read > left_to_read(conn)) {
|
|
to_read = (int) left_to_read(conn);
|
|
}
|
|
} while (!eof && (n = pull(NULL, conn, buf + len, to_read)) > 0);
|
|
conn->data_len = conn->request_len + len;
|
|
|
|
if (eof) {
|
|
rewind(fp);
|
|
return fp;
|
|
} else {
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int is_put_or_delete_request(const struct mg_connection *conn) {
|
|
const char *s = conn->request_info.request_method;
|
|
return s != NULL && (!strcmp(s, "PUT") ||
|
|
!strcmp(s, "DELETE") ||
|
|
!strcmp(s, "MKCOL"));
|
|
}
|
|
|
|
static int get_first_ssl_listener_index(const struct mg_context *ctx) {
|
|
int i, index = -1;
|
|
for (i = 0; index == -1 && i < ctx->num_listening_sockets; i++) {
|
|
index = ctx->listening_sockets[i].is_ssl ? i : -1;
|
|
}
|
|
return index;
|
|
}
|
|
|
|
static void redirect_to_https_port(struct mg_connection *conn, int ssl_index) {
|
|
char host[1025];
|
|
const char *host_header;
|
|
|
|
if ((host_header = mg_get_header(conn, "Host")) == NULL ||
|
|
sscanf(host_header, "%1024[^:]", host) == 0) {
|
|
// Cannot get host from the Host: header. Fallback to our IP address.
|
|
sockaddr_to_string(host, sizeof(host), &conn->client.lsa);
|
|
}
|
|
|
|
mg_printf(conn, "HTTP/1.1 302 Found\r\nLocation: https://%s:%d%s\r\n\r\n",
|
|
host, (int) ntohs(conn->ctx->listening_sockets[ssl_index].
|
|
lsa.sin.sin_port), conn->request_info.uri);
|
|
}
|
|
|
|
static void handle_delete_request(struct mg_connection *conn,
|
|
const char *path) {
|
|
struct file file = STRUCT_FILE_INITIALIZER;
|
|
|
|
if (!mg_stat(path, &file)) {
|
|
send_http_error(conn, 404, "Not Found", "%s", "File not found");
|
|
} else if (!file.modification_time) {
|
|
send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
|
|
strerror(ERRNO));
|
|
} else if (file.is_directory) {
|
|
remove_directory(conn, path);
|
|
send_http_error(conn, 204, "No Content", "%s", "");
|
|
} else if (mg_remove(path) == 0) {
|
|
send_http_error(conn, 204, "No Content", "%s", "");
|
|
} else {
|
|
send_http_error(conn, 423, "Locked", "remove(%s): %s", path,
|
|
strerror(ERRNO));
|
|
}
|
|
}
|
|
|
|
// This is the heart of the Mongoose's logic.
|
|
// This function is called when the request is read, parsed and validated,
|
|
// and Mongoose must decide what action to take: serve a file, or
|
|
// a directory, or call embedded function, etcetera.
|
|
static void handle_request(struct mg_connection *conn) {
|
|
struct mg_request_info *ri = &conn->request_info;
|
|
char path[PATH_MAX];
|
|
int uri_len, ssl_index;
|
|
struct file file = STRUCT_FILE_INITIALIZER;
|
|
|
|
if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
|
|
* ((char *) conn->request_info.query_string++) = '\0';
|
|
}
|
|
uri_len = (int) strlen(ri->uri);
|
|
mg_url_decode(ri->uri, uri_len, (char *) ri->uri, uri_len + 1, 0);
|
|
remove_double_dots_and_double_slashes((char *) ri->uri);
|
|
conn->throttle = set_throttle(conn->ctx->config[THROTTLE],
|
|
get_remote_ip(conn), ri->uri);
|
|
path[0] = '\0';
|
|
convert_uri_to_file_name(conn, path, sizeof(path), &file);
|
|
|
|
// Perform redirect and auth checks before calling begin_request() handler.
|
|
// Otherwise, begin_request() would need to perform auth checks and redirects.
|
|
if (!conn->client.is_ssl && conn->client.ssl_redir &&
|
|
(ssl_index = get_first_ssl_listener_index(conn->ctx)) > -1) {
|
|
redirect_to_https_port(conn, ssl_index);
|
|
} else if (!is_put_or_delete_request(conn) &&
|
|
!check_authorization(conn, path)) {
|
|
send_authorization_request(conn);
|
|
} else if (call_user(MG_REQUEST_BEGIN, conn, (void *) ri->uri) == 1) {
|
|
// Do nothing, callback has served the request
|
|
} else if (!strcmp(ri->request_method, "OPTIONS")) {
|
|
handle_options_request(conn);
|
|
} else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
|
|
send_http_error(conn, 404, "Not Found", "Not Found");
|
|
} else if (is_put_or_delete_request(conn) &&
|
|
(is_authorized_for_put(conn) != 1)) {
|
|
send_authorization_request(conn);
|
|
} else if (!strcmp(ri->request_method, "PUT")) {
|
|
put_file(conn, path);
|
|
} else if (!strcmp(ri->request_method, "MKCOL")) {
|
|
mkcol(conn, path);
|
|
} else if (!strcmp(ri->request_method, "DELETE")) {
|
|
handle_delete_request(conn, path);
|
|
} else if (file.modification_time == (time_t) 0 ||
|
|
must_hide_file(conn, path)) {
|
|
send_http_error(conn, 404, "Not Found", "%s", "File not found");
|
|
} else if (file.is_directory && ri->uri[uri_len - 1] != '/') {
|
|
mg_printf(conn, "HTTP/1.1 301 Moved Permanently\r\n"
|
|
"Location: %s/\r\n\r\n", ri->uri);
|
|
} else if (!strcmp(ri->request_method, "PROPFIND")) {
|
|
handle_propfind(conn, path, &file);
|
|
} else if (file.is_directory &&
|
|
!substitute_index_file(conn, path, sizeof(path), &file)) {
|
|
if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
|
|
handle_directory_request(conn, path);
|
|
} else {
|
|
send_http_error(conn, 403, "Directory Listing Denied",
|
|
"Directory listing denied");
|
|
}
|
|
#ifdef USE_LUA
|
|
} else if (match_prefix("**.lp$", 6, path) > 0) {
|
|
handle_lsp_request(conn, path, &file, NULL);
|
|
#endif
|
|
#if !defined(NO_CGI)
|
|
} else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
|
|
strlen(conn->ctx->config[CGI_EXTENSIONS]),
|
|
path) > 0) {
|
|
if (strcmp(ri->request_method, "POST") &&
|
|
strcmp(ri->request_method, "HEAD") &&
|
|
strcmp(ri->request_method, "GET")) {
|
|
send_http_error(conn, 501, "Not Implemented",
|
|
"Method %s is not implemented", ri->request_method);
|
|
} else {
|
|
handle_cgi_request(conn, path);
|
|
}
|
|
#endif // !NO_CGI
|
|
} else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
|
|
strlen(conn->ctx->config[SSI_EXTENSIONS]),
|
|
path) > 0) {
|
|
handle_ssi_file_request(conn, path);
|
|
} else if (is_not_modified(conn, &file)) {
|
|
send_http_error(conn, 304, "Not Modified", "%s", "");
|
|
} else {
|
|
handle_file_request(conn, path, &file);
|
|
}
|
|
}
|
|
|
|
static void close_all_listening_sockets(struct mg_context *ctx) {
|
|
int i;
|
|
for (i = 0; i < ctx->num_listening_sockets; i++) {
|
|
closesocket(ctx->listening_sockets[i].sock);
|
|
}
|
|
free(ctx->listening_sockets);
|
|
}
|
|
|
|
static int is_valid_port(unsigned int port) {
|
|
return port > 0 && port < 0xffff;
|
|
}
|
|
|
|
// Valid listening port specification is: [ip_address:]port[s]
|
|
// Examples: 80, 443s, 127.0.0.1:3128, 1.2.3.4:8080s
|
|
// TODO(lsm): add parsing of the IPv6 address
|
|
static int parse_port_string(const struct vec *vec, struct socket *so) {
|
|
unsigned int a, b, c, d, ch, port;
|
|
int len;
|
|
#if defined(USE_IPV6)
|
|
char buf[100];
|
|
#endif
|
|
|
|
// MacOS needs that. If we do not zero it, subsequent bind() will fail.
|
|
// Also, all-zeroes in the socket address means binding to all addresses
|
|
// for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
|
|
memset(so, 0, sizeof(*so));
|
|
so->lsa.sin.sin_family = AF_INET;
|
|
|
|
if (sscanf(vec->ptr, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) {
|
|
// Bind to a specific IPv4 address, e.g. 192.168.1.5:8080
|
|
so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
|
|
so->lsa.sin.sin_port = htons((uint16_t) port);
|
|
#if defined(USE_IPV6)
|
|
|
|
} else if (sscanf(vec->ptr, "[%49[^]]]:%d%n", buf, &port, &len) == 2 &&
|
|
inet_pton(AF_INET6, buf, &so->lsa.sin6.sin6_addr)) {
|
|
// IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080
|
|
so->lsa.sin6.sin6_family = AF_INET6;
|
|
so->lsa.sin6.sin6_port = htons((uint16_t) port);
|
|
#endif
|
|
} else if (sscanf(vec->ptr, "%u%n", &port, &len) == 1) {
|
|
// If only port is specified, bind to IPv4, INADDR_ANY
|
|
so->lsa.sin.sin_port = htons((uint16_t) port);
|
|
} else {
|
|
port = len = 0; // Parsing failure. Make port invalid.
|
|
}
|
|
|
|
ch = vec->ptr[len]; // Next character after the port number
|
|
so->is_ssl = ch == 's';
|
|
so->ssl_redir = ch == 'r';
|
|
|
|
// Make sure the port is valid and vector ends with 's', 'r' or ','
|
|
return is_valid_port(port) &&
|
|
(ch == '\0' || ch == 's' || ch == 'r' || ch == ',');
|
|
}
|
|
|
|
static int set_ports_option(struct mg_context *ctx) {
|
|
const char *list = ctx->config[LISTENING_PORTS];
|
|
int on = 1, success = 1;
|
|
#if defined(USE_IPV6)
|
|
int off = 0;
|
|
#endif
|
|
struct vec vec;
|
|
struct socket so, *ptr;
|
|
|
|
while (success && (list = next_option(list, &vec, NULL)) != NULL) {
|
|
if (!parse_port_string(&vec, &so)) {
|
|
cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
|
|
__func__, (int) vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|r]");
|
|
success = 0;
|
|
} else if (so.is_ssl && ctx->ssl_ctx == NULL) {
|
|
cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?");
|
|
success = 0;
|
|
} else if ((so.sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) ==
|
|
INVALID_SOCKET ||
|
|
// On Windows, SO_REUSEADDR is recommended only for
|
|
// broadcast UDP sockets
|
|
setsockopt(so.sock, SOL_SOCKET, SO_REUSEADDR,
|
|
(void *) &on, sizeof(on)) != 0 ||
|
|
#if defined(USE_IPV6)
|
|
(so.lsa.sa.sa_family == AF_INET6 &&
|
|
setsockopt(so.sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *) &off,
|
|
sizeof(off)) != 0) ||
|
|
#endif
|
|
bind(so.sock, &so.lsa.sa, so.lsa.sa.sa_family == AF_INET ?
|
|
sizeof(so.lsa.sin) : sizeof(so.lsa)) != 0 ||
|
|
listen(so.sock, SOMAXCONN) != 0) {
|
|
cry(fc(ctx), "%s: cannot bind to %.*s: %d (%s)", __func__,
|
|
(int) vec.len, vec.ptr, ERRNO, strerror(errno));
|
|
closesocket(so.sock);
|
|
success = 0;
|
|
} else if ((ptr = (struct socket *) realloc(ctx->listening_sockets,
|
|
(ctx->num_listening_sockets + 1) *
|
|
sizeof(ctx->listening_sockets[0]))) == NULL) {
|
|
closesocket(so.sock);
|
|
success = 0;
|
|
} else {
|
|
set_close_on_exec(so.sock);
|
|
ctx->listening_sockets = ptr;
|
|
ctx->listening_sockets[ctx->num_listening_sockets] = so;
|
|
ctx->num_listening_sockets++;
|
|
}
|
|
}
|
|
|
|
if (!success) {
|
|
close_all_listening_sockets(ctx);
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
static void log_header(const struct mg_connection *conn, const char *header,
|
|
FILE *fp) {
|
|
const char *header_value;
|
|
|
|
if ((header_value = mg_get_header(conn, header)) == NULL) {
|
|
(void) fprintf(fp, "%s", " -");
|
|
} else {
|
|
(void) fprintf(fp, " \"%s\"", header_value);
|
|
}
|
|
}
|
|
|
|
static void log_access(const struct mg_connection *conn) {
|
|
const struct mg_request_info *ri;
|
|
FILE *fp;
|
|
char date[64], src_addr[IP_ADDR_STR_LEN];
|
|
|
|
fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL :
|
|
fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
|
|
|
|
if (fp == NULL)
|
|
return;
|
|
|
|
strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
|
|
localtime(&conn->birth_time));
|
|
|
|
ri = &conn->request_info;
|
|
flockfile(fp);
|
|
|
|
sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
|
|
fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
|
|
src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date,
|
|
ri->request_method ? ri->request_method : "-",
|
|
ri->uri ? ri->uri : "-", ri->http_version,
|
|
conn->status_code, conn->num_bytes_sent);
|
|
log_header(conn, "Referer", fp);
|
|
log_header(conn, "User-Agent", fp);
|
|
fputc('\n', fp);
|
|
fflush(fp);
|
|
|
|
funlockfile(fp);
|
|
fclose(fp);
|
|
}
|
|
|
|
// Verify given socket address against the ACL.
|
|
// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
|
|
static int check_acl(struct mg_context *ctx, uint32_t remote_ip) {
|
|
int allowed, flag;
|
|
uint32_t net, mask;
|
|
struct vec vec;
|
|
const char *list = ctx->config[ACCESS_CONTROL_LIST];
|
|
|
|
// If any ACL is set, deny by default
|
|
allowed = list == NULL ? '+' : '-';
|
|
|
|
while ((list = next_option(list, &vec, NULL)) != NULL) {
|
|
flag = vec.ptr[0];
|
|
if ((flag != '+' && flag != '-') ||
|
|
parse_net(&vec.ptr[1], &net, &mask) == 0) {
|
|
cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
|
|
return -1;
|
|
}
|
|
|
|
if (net == (remote_ip & mask)) {
|
|
allowed = flag;
|
|
}
|
|
}
|
|
|
|
return allowed == '+';
|
|
}
|
|
|
|
#if !defined(_WIN32)
|
|
static int set_uid_option(struct mg_context *ctx) {
|
|
struct passwd *pw;
|
|
const char *uid = ctx->config[RUN_AS_USER];
|
|
int success = 0;
|
|
|
|
if (uid == NULL) {
|
|
success = 1;
|
|
} else {
|
|
if ((pw = getpwnam(uid)) == NULL) {
|
|
cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
|
|
} else if (setgid(pw->pw_gid) == -1) {
|
|
cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
|
|
} else if (setuid(pw->pw_uid) == -1) {
|
|
cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
|
|
} else {
|
|
success = 1;
|
|
}
|
|
}
|
|
|
|
return success;
|
|
}
|
|
#endif // !_WIN32
|
|
|
|
static int set_gpass_option(struct mg_context *ctx) {
|
|
struct file file = STRUCT_FILE_INITIALIZER;
|
|
const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
|
|
if (path != NULL && !mg_stat(path, &file)) {
|
|
cry(fc(ctx), "Cannot open %s: %s", path, strerror(ERRNO));
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int set_acl_option(struct mg_context *ctx) {
|
|
return check_acl(ctx, (uint32_t) 0x7f000001UL) != -1;
|
|
}
|
|
|
|
static void reset_per_request_attributes(struct mg_connection *conn) {
|
|
conn->path_info = NULL;
|
|
conn->num_bytes_sent = conn->num_bytes_read = 0;
|
|
conn->status_code = -1;
|
|
conn->must_close = conn->request_len = conn->throttle = 0;
|
|
}
|
|
|
|
static void close_socket_gracefully(struct mg_connection *conn) {
|
|
#if defined(_WIN32)
|
|
char buf[MG_BUF_LEN];
|
|
int n;
|
|
#endif
|
|
struct linger linger;
|
|
|
|
// Set linger option to avoid socket hanging out after close. This prevent
|
|
// ephemeral port exhaust problem under high QPS.
|
|
linger.l_onoff = 1;
|
|
linger.l_linger = 1;
|
|
setsockopt(conn->client.sock, SOL_SOCKET, SO_LINGER,
|
|
(char *) &linger, sizeof(linger));
|
|
|
|
// Send FIN to the client
|
|
shutdown(conn->client.sock, SHUT_WR);
|
|
set_non_blocking_mode(conn->client.sock);
|
|
|
|
#if defined(_WIN32)
|
|
// Read and discard pending incoming data. If we do not do that and close the
|
|
// socket, the data in the send buffer may be discarded. This
|
|
// behaviour is seen on Windows, when client keeps sending data
|
|
// when server decides to close the connection; then when client
|
|
// does recv() it gets no data back.
|
|
do {
|
|
n = pull(NULL, conn, buf, sizeof(buf));
|
|
} while (n > 0);
|
|
#endif
|
|
|
|
// Now we know that our FIN is ACK-ed, safe to close
|
|
closesocket(conn->client.sock);
|
|
}
|
|
|
|
static void close_connection(struct mg_connection *conn) {
|
|
conn->must_close = 1;
|
|
|
|
#ifndef NO_SSL
|
|
if (conn->ssl != NULL) {
|
|
// Run SSL_shutdown twice to ensure completly close SSL connection
|
|
SSL_shutdown(conn->ssl);
|
|
SSL_free(conn->ssl);
|
|
conn->ssl = NULL;
|
|
}
|
|
#endif
|
|
if (conn->client.sock != INVALID_SOCKET) {
|
|
close_socket_gracefully(conn);
|
|
conn->client.sock = INVALID_SOCKET;
|
|
}
|
|
}
|
|
|
|
void mg_close_connection(struct mg_connection *conn) {
|
|
#ifndef NO_SSL
|
|
if (conn->client_ssl_ctx != NULL) {
|
|
SSL_CTX_free((SSL_CTX *) conn->client_ssl_ctx);
|
|
}
|
|
#endif
|
|
close_connection(conn);
|
|
free(conn);
|
|
}
|
|
|
|
static int is_valid_uri(const char *uri) {
|
|
// Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
|
|
// URI can be an asterisk (*) or should start with slash.
|
|
return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
|
|
}
|
|
|
|
static int getreq(struct mg_connection *conn, char *ebuf, size_t ebuf_len) {
|
|
const char *cl;
|
|
|
|
ebuf[0] = '\0';
|
|
reset_per_request_attributes(conn);
|
|
conn->request_len = read_request(NULL, conn, conn->buf, conn->buf_size,
|
|
&conn->data_len);
|
|
assert(conn->request_len < 0 || conn->data_len >= conn->request_len);
|
|
|
|
if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
|
|
snprintf(ebuf, ebuf_len, "%s", "Request Too Large");
|
|
} else if (conn->request_len <= 0) {
|
|
snprintf(ebuf, ebuf_len, "%s", "Client closed connection");
|
|
} else if (parse_http_message(conn->buf, conn->buf_size,
|
|
&conn->request_info) <= 0) {
|
|
snprintf(ebuf, ebuf_len, "Bad request: [%.*s]", conn->data_len, conn->buf);
|
|
} else {
|
|
// Request is valid. Set content_len attribute by parsing Content-Length
|
|
// If Content-Length is absent, set content_len to 0 if request is GET,
|
|
// and set it to INT64_MAX otherwise. Setting to INT64_MAX instructs
|
|
// mg_read() to read from the socket until socket is closed.
|
|
// The reason for treating GET and POST/PUT differently is that libraries
|
|
// like jquery do not set Content-Length in GET requests, and we don't
|
|
// want mg_read() to hang waiting until socket is timed out.
|
|
// See https://github.com/cesanta/mongoose/pull/121 for more.
|
|
conn->content_len = INT64_MAX;
|
|
if (!mg_strcasecmp(conn->request_info.request_method, "GET")) {
|
|
conn->content_len = 0;
|
|
}
|
|
if ((cl = get_header(&conn->request_info, "Content-Length")) != NULL) {
|
|
conn->content_len = strtoll(cl, NULL, 10);
|
|
}
|
|
conn->birth_time = time(NULL);
|
|
}
|
|
return ebuf[0] == '\0';
|
|
}
|
|
|
|
static void process_new_connection(struct mg_connection *conn) {
|
|
struct mg_request_info *ri = &conn->request_info;
|
|
int keep_alive_enabled, keep_alive, discard_len;
|
|
char ebuf[100];
|
|
|
|
keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
|
|
keep_alive = 0;
|
|
|
|
// Important: on new connection, reset the receiving buffer. Credit goes
|
|
// to crule42.
|
|
conn->data_len = 0;
|
|
do {
|
|
if (!getreq(conn, ebuf, sizeof(ebuf))) {
|
|
send_http_error(conn, 500, "Server Error", "%s", ebuf);
|
|
conn->must_close = 1;
|
|
} else if (!is_valid_uri(conn->request_info.uri)) {
|
|
snprintf(ebuf, sizeof(ebuf), "Invalid URI: [%s]", ri->uri);
|
|
send_http_error(conn, 400, "Bad Request", "%s", ebuf);
|
|
} else if (strcmp(ri->http_version, "1.0") &&
|
|
strcmp(ri->http_version, "1.1")) {
|
|
snprintf(ebuf, sizeof(ebuf), "Bad HTTP version: [%s]", ri->http_version);
|
|
send_http_error(conn, 505, "Bad HTTP version", "%s", ebuf);
|
|
}
|
|
|
|
if (ebuf[0] == '\0') {
|
|
handle_request(conn);
|
|
call_user(MG_REQUEST_END, conn, (void *) conn->status_code);
|
|
log_access(conn);
|
|
}
|
|
if (ri->remote_user != NULL) {
|
|
free((void *) ri->remote_user);
|
|
// Important! When having connections with and without auth
|
|
// would cause double free and then crash
|
|
ri->remote_user = NULL;
|
|
}
|
|
|
|
// NOTE(lsm): order is important here. should_keep_alive() call
|
|
// is using parsed request, which will be invalid after memmove's below.
|
|
// Therefore, memorize should_keep_alive() result now for later use
|
|
// in loop exit condition.
|
|
keep_alive = conn->ctx->stop_flag == 0 && keep_alive_enabled &&
|
|
conn->content_len >= 0 && should_keep_alive(conn);
|
|
|
|
// Discard all buffered data for this request
|
|
discard_len = conn->content_len >= 0 && conn->request_len > 0 &&
|
|
conn->request_len + conn->content_len < (int64_t) conn->data_len ?
|
|
(int) (conn->request_len + conn->content_len) : conn->data_len;
|
|
assert(discard_len >= 0);
|
|
memmove(conn->buf, conn->buf + discard_len, conn->data_len - discard_len);
|
|
conn->data_len -= discard_len;
|
|
assert(conn->data_len >= 0);
|
|
assert(conn->data_len <= conn->buf_size);
|
|
} while (keep_alive);
|
|
}
|
|
|
|
// Worker threads take accepted socket from the queue
|
|
static int consume_socket(struct mg_context *ctx, struct socket *sp) {
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
DEBUG_TRACE(("going idle"));
|
|
|
|
// If the queue is empty, wait. We're idle at this point.
|
|
while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
|
|
pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
|
|
}
|
|
|
|
// If we're stopping, sq_head may be equal to sq_tail.
|
|
if (ctx->sq_head > ctx->sq_tail) {
|
|
// Copy socket from the queue and increment tail
|
|
*sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
|
|
ctx->sq_tail++;
|
|
DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
|
|
|
|
// Wrap pointers if needed
|
|
while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
|
|
ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
|
|
ctx->sq_head -= ARRAY_SIZE(ctx->queue);
|
|
}
|
|
}
|
|
|
|
(void) pthread_cond_signal(&ctx->sq_empty);
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
|
|
return !ctx->stop_flag;
|
|
}
|
|
|
|
static void *worker_thread(void *thread_func_param) {
|
|
struct mg_context *ctx = (struct mg_context *) thread_func_param;
|
|
struct mg_connection *conn;
|
|
|
|
conn = (struct mg_connection *) calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE);
|
|
if (conn == NULL) {
|
|
cry(fc(ctx), "%s", "Cannot create new connection struct, OOM");
|
|
} else {
|
|
conn->buf_size = MAX_REQUEST_SIZE;
|
|
conn->buf = (char *) (conn + 1);
|
|
conn->ctx = ctx;
|
|
conn->event.user_data = ctx->user_data;
|
|
|
|
call_user(MG_THREAD_BEGIN, conn, NULL);
|
|
|
|
// Call consume_socket() even when ctx->stop_flag > 0, to let it signal
|
|
// sq_empty condvar to wake up the master waiting in produce_socket()
|
|
while (consume_socket(ctx, &conn->client)) {
|
|
conn->birth_time = time(NULL);
|
|
|
|
// Fill in IP, port info early so even if SSL setup below fails,
|
|
// error handler would have the corresponding info.
|
|
// Thanks to Johannes Winkelmann for the patch.
|
|
// TODO(lsm): Fix IPv6 case
|
|
conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port);
|
|
memcpy(&conn->request_info.remote_ip,
|
|
&conn->client.rsa.sin.sin_addr.s_addr, 4);
|
|
conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
|
|
conn->request_info.is_ssl = conn->client.is_ssl;
|
|
|
|
if (!conn->client.is_ssl
|
|
#ifndef NO_SSL
|
|
|| sslize(conn, conn->ctx->ssl_ctx, SSL_accept)
|
|
#endif
|
|
) {
|
|
process_new_connection(conn);
|
|
}
|
|
|
|
close_connection(conn);
|
|
}
|
|
call_user(MG_THREAD_END, conn, NULL);
|
|
free(conn);
|
|
}
|
|
|
|
// Signal master that we're done with connection and exiting
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
ctx->num_threads--;
|
|
(void) pthread_cond_signal(&ctx->cond);
|
|
assert(ctx->num_threads >= 0);
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
|
|
DEBUG_TRACE(("exiting"));
|
|
return NULL;
|
|
}
|
|
|
|
// Master thread adds accepted socket to a queue
|
|
static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
|
|
// If the queue is full, wait
|
|
while (ctx->stop_flag == 0 &&
|
|
ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
|
|
(void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
|
|
}
|
|
|
|
if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) {
|
|
// Copy socket to the queue and increment head
|
|
ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
|
|
ctx->sq_head++;
|
|
DEBUG_TRACE(("queued socket %d", sp->sock));
|
|
}
|
|
|
|
(void) pthread_cond_signal(&ctx->sq_full);
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
}
|
|
|
|
static int set_sock_timeout(SOCKET sock, int milliseconds) {
|
|
#ifdef _WIN32
|
|
DWORD t = milliseconds;
|
|
#else
|
|
struct timeval t;
|
|
t.tv_sec = milliseconds / 1000;
|
|
t.tv_usec = (milliseconds * 1000) % 1000000;
|
|
#endif
|
|
return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *) &t, sizeof(t)) ||
|
|
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (void *) &t, sizeof(t));
|
|
}
|
|
|
|
static void accept_new_connection(const struct socket *listener,
|
|
struct mg_context *ctx) {
|
|
struct socket so;
|
|
char src_addr[IP_ADDR_STR_LEN];
|
|
socklen_t len = sizeof(so.rsa);
|
|
int on = 1;
|
|
|
|
if ((so.sock = accept(listener->sock, &so.rsa.sa, &len)) == INVALID_SOCKET) {
|
|
} else if (!check_acl(ctx, ntohl(* (uint32_t *) &so.rsa.sin.sin_addr))) {
|
|
sockaddr_to_string(src_addr, sizeof(src_addr), &so.rsa);
|
|
cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr);
|
|
closesocket(so.sock);
|
|
} else {
|
|
// Put so socket structure into the queue
|
|
DEBUG_TRACE(("Accepted socket %d", (int) so.sock));
|
|
set_close_on_exec(so.sock);
|
|
so.is_ssl = listener->is_ssl;
|
|
so.ssl_redir = listener->ssl_redir;
|
|
getsockname(so.sock, &so.lsa.sa, &len);
|
|
// Set TCP keep-alive. This is needed because if HTTP-level keep-alive
|
|
// is enabled, and client resets the connection, server won't get
|
|
// TCP FIN or RST and will keep the connection open forever. With TCP
|
|
// keep-alive, next keep-alive handshake will figure out that the client
|
|
// is down and will close the server end.
|
|
// Thanks to Igor Klopov who suggested the patch.
|
|
setsockopt(so.sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on, sizeof(on));
|
|
set_sock_timeout(so.sock, atoi(ctx->config[REQUEST_TIMEOUT]));
|
|
produce_socket(ctx, &so);
|
|
}
|
|
}
|
|
|
|
static void *master_thread(void *thread_func_param) {
|
|
struct mg_context *ctx = (struct mg_context *) thread_func_param;
|
|
struct pollfd *pfd;
|
|
int i;
|
|
|
|
// Increase priority of the master thread
|
|
#if defined(_WIN32)
|
|
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
|
|
#endif
|
|
|
|
#if defined(ISSUE_317)
|
|
struct sched_param sched_param;
|
|
sched_param.sched_priority = sched_get_priority_max(SCHED_RR);
|
|
pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param);
|
|
#endif
|
|
|
|
call_user(MG_THREAD_BEGIN, fc(ctx), NULL);
|
|
|
|
pfd = (struct pollfd *) calloc(ctx->num_listening_sockets, sizeof(pfd[0]));
|
|
while (pfd != NULL && ctx->stop_flag == 0) {
|
|
for (i = 0; i < ctx->num_listening_sockets; i++) {
|
|
pfd[i].fd = ctx->listening_sockets[i].sock;
|
|
pfd[i].events = POLLIN;
|
|
}
|
|
|
|
if (poll(pfd, ctx->num_listening_sockets, 200) > 0) {
|
|
for (i = 0; i < ctx->num_listening_sockets; i++) {
|
|
// NOTE(lsm): on QNX, poll() returns POLLRDNORM after the
|
|
// successfull poll, and POLLIN is defined as (POLLRDNORM | POLLRDBAND)
|
|
// Therefore, we're checking pfd[i].revents & POLLIN, not
|
|
// pfd[i].revents == POLLIN.
|
|
if (ctx->stop_flag == 0 && (pfd[i].revents & POLLIN)) {
|
|
accept_new_connection(&ctx->listening_sockets[i], ctx);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
free(pfd);
|
|
DEBUG_TRACE(("stopping workers"));
|
|
|
|
// Stop signal received: somebody called mg_stop. Quit.
|
|
close_all_listening_sockets(ctx);
|
|
|
|
// Wakeup workers that are waiting for connections to handle.
|
|
pthread_cond_broadcast(&ctx->sq_full);
|
|
|
|
// Wait until all threads finish
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
while (ctx->num_threads > 0) {
|
|
(void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
|
|
}
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
|
|
// All threads exited, no sync is needed. Destroy mutex and condvars
|
|
(void) pthread_mutex_destroy(&ctx->mutex);
|
|
(void) pthread_cond_destroy(&ctx->cond);
|
|
(void) pthread_cond_destroy(&ctx->sq_empty);
|
|
(void) pthread_cond_destroy(&ctx->sq_full);
|
|
|
|
#if !defined(NO_SSL)
|
|
uninitialize_ssl(ctx);
|
|
#endif
|
|
DEBUG_TRACE(("exiting"));
|
|
|
|
call_user(MG_THREAD_END, fc(ctx), NULL);
|
|
|
|
// Signal mg_stop() that we're done.
|
|
// WARNING: This must be the very last thing this
|
|
// thread does, as ctx becomes invalid after this line.
|
|
ctx->stop_flag = 2;
|
|
return NULL;
|
|
}
|
|
|
|
static void free_context(struct mg_context *ctx) {
|
|
int i;
|
|
|
|
// Deallocate config parameters
|
|
for (i = 0; i < NUM_OPTIONS; i++) {
|
|
if (ctx->config[i] != NULL)
|
|
free(ctx->config[i]);
|
|
}
|
|
|
|
#ifndef NO_SSL
|
|
// Deallocate SSL context
|
|
if (ctx->ssl_ctx != NULL) {
|
|
SSL_CTX_free(ctx->ssl_ctx);
|
|
}
|
|
if (ssl_mutexes != NULL) {
|
|
free(ssl_mutexes);
|
|
ssl_mutexes = NULL;
|
|
}
|
|
#endif // !NO_SSL
|
|
|
|
// Deallocate context itself
|
|
free(ctx);
|
|
}
|
|
|
|
void mg_stop(struct mg_context *ctx) {
|
|
ctx->stop_flag = 1;
|
|
|
|
// Wait until mg_fini() stops
|
|
while (ctx->stop_flag != 2) {
|
|
(void) mg_sleep(10);
|
|
}
|
|
free_context(ctx);
|
|
|
|
#if defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
(void) WSACleanup();
|
|
#endif // _WIN32
|
|
}
|
|
|
|
struct mg_context *mg_start(const char **options,
|
|
mg_event_handler_t func,
|
|
void *user_data) {
|
|
struct mg_context *ctx;
|
|
const char *name, *value, *default_value;
|
|
int i;
|
|
|
|
#if defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
WSADATA data;
|
|
WSAStartup(MAKEWORD(2,2), &data);
|
|
#endif // _WIN32
|
|
|
|
// Allocate context and initialize reasonable general case defaults.
|
|
// TODO(lsm): do proper error handling here.
|
|
if ((ctx = (struct mg_context *) calloc(1, sizeof(*ctx))) == NULL) {
|
|
return NULL;
|
|
}
|
|
ctx->event_handler = func;
|
|
ctx->user_data = user_data;
|
|
|
|
while (options && (name = *options++) != NULL) {
|
|
if ((i = get_option_index(name)) == -1) {
|
|
cry(fc(ctx), "Invalid option: %s", name);
|
|
free_context(ctx);
|
|
return NULL;
|
|
} else if ((value = *options++) == NULL) {
|
|
cry(fc(ctx), "%s: option value cannot be NULL", name);
|
|
free_context(ctx);
|
|
return NULL;
|
|
}
|
|
if (ctx->config[i] != NULL) {
|
|
cry(fc(ctx), "warning: %s: duplicate option", name);
|
|
free(ctx->config[i]);
|
|
}
|
|
ctx->config[i] = mg_strdup(value);
|
|
DEBUG_TRACE(("[%s] -> [%s]", name, value));
|
|
}
|
|
|
|
// Set default value if needed
|
|
for (i = 0; config_options[i * 2] != NULL; i++) {
|
|
default_value = config_options[i * 2 + 1];
|
|
if (ctx->config[i] == NULL && default_value != NULL) {
|
|
ctx->config[i] = mg_strdup(default_value);
|
|
}
|
|
}
|
|
|
|
// NOTE(lsm): order is important here. SSL certificates must
|
|
// be initialized before listening ports. UID must be set last.
|
|
if (!set_gpass_option(ctx) ||
|
|
#if !defined(NO_SSL)
|
|
!set_ssl_option(ctx) ||
|
|
#endif
|
|
!set_ports_option(ctx) ||
|
|
#if !defined(_WIN32)
|
|
!set_uid_option(ctx) ||
|
|
#endif
|
|
!set_acl_option(ctx)) {
|
|
free_context(ctx);
|
|
return NULL;
|
|
}
|
|
|
|
#if !defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
// Ignore SIGPIPE signal, so if browser cancels the request, it
|
|
// won't kill the whole process.
|
|
(void) signal(SIGPIPE, SIG_IGN);
|
|
#endif // !_WIN32
|
|
|
|
(void) pthread_mutex_init(&ctx->mutex, NULL);
|
|
(void) pthread_cond_init(&ctx->cond, NULL);
|
|
(void) pthread_cond_init(&ctx->sq_empty, NULL);
|
|
(void) pthread_cond_init(&ctx->sq_full, NULL);
|
|
|
|
// Start master (listening) thread
|
|
mg_start_thread(master_thread, ctx);
|
|
|
|
// Start worker threads
|
|
for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
|
|
if (mg_start_thread(worker_thread, ctx) != 0) {
|
|
cry(fc(ctx), "Cannot start worker thread: %ld", (long) ERRNO);
|
|
} else {
|
|
ctx->num_threads++;
|
|
}
|
|
}
|
|
|
|
return ctx;
|
|
}
|