Add mg_remove_double_dots(), hide mg_http_upload()

src/http.c

@@ -621,26 +621,6 @@ static void listdir(struct mg_connection *c, struct mg_http_message *hm,
   memcpy(c->send.buf + off - 12, tmp, n);  // Set content length
 }
 
-static void remove_double_dots(char *s) {
-  char *p = s;
-  while (*s != '\0') {
-    *p++ = *s++;
-    if (s[-1] == '/' || s[-1] == '\\') {
-      while (s[0] != '\0') {
-        if (s[0] == '/' || s[0] == '\\') {
-          s++;
-        } else if (s[0] == '.' && s[1] == '.' &&
-                   (s[2] == '/' || s[2] == '\\')) {
-          s += 2;
-        } else {
-          break;
-        }
-      }
-    }
-  }
-  *p = '\0';
-}
-
 // Resolve requested file into `path` and return its fs->st() result
 static int uri_to_path2(struct mg_connection *c, struct mg_http_message *hm,
                         struct mg_fs *fs, struct mg_str url, struct mg_str dir,
@@ -654,7 +634,7 @@ static int uri_to_path2(struct mg_connection *c, struct mg_http_message *hm,
   mg_url_decode(hm->uri.ptr + url.len, hm->uri.len - url.len, path + n,
                 path_size - n, 0);
   path[path_size - 1] = '\0';  // Double-check
-  remove_double_dots(path);
+  mg_remove_double_dots(path);
   n = strlen(path);
   while (n > 1 && path[n - 1] == '/') path[--n] = 0;  // Trim trailing slashes
   flags = mg_vcmp(&hm->uri, "/") == 0 ? MG_FS_DIR : fs->st(path, NULL, NULL);
@@ -873,7 +853,7 @@ int mg_http_upload(struct mg_connection *c, struct mg_http_message *hm,
     struct mg_fd *fd;
     long oft = strtol(offset, NULL, 0);
     mg_snprintf(path, sizeof(path), "%s%c%s", dir, MG_DIRSEP, name);
-    remove_double_dots(path);
+    mg_remove_double_dots(path);
     MG_DEBUG(("%d bytes @ %ld [%s]", (int) hm->body.len, oft, path));
     if (oft == 0) fs->rm(path);
     if ((fd = mg_fs_open(fs, path, MG_FS_WRITE)) == NULL) {