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Add chart example

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Sergey Lyubka committed 2022-05-23 15:27:19 +01:00
1 parent b3a4c12d67
commit c2d2d085cd
9 files changed
+5209 -748
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examples/device-dashboard/web.c
+17 -6
View File
@@ -70,15 +70,25 @@ static void send_notification(struct mg_mgr *mgr, const char *name,
struct mg_connection *c;
for (c = mgr->conns; c != NULL; c = c->next) {
if (c->label[0] == 'W')
mg_http_printf_chunk(c, "{\"name\": \"%s\", \"data\": \"%s\"}", name,
data == NULL ? "" : data);
mg_http_printf_chunk(c, "{\"name\": \"%s\", \"data\": %s}", name, data);
}
}
// Send simulated metrics data to the dashboard, for chart rendering
static void timer_func(void *param) {
char buf[50];
mg_snprintf(buf, sizeof(buf), "[ %lu, %d ]", (unsigned long) time(NULL),
10 + (int) ((double) rand() * 10 / RAND_MAX));
// MG_INFO(("%s", buf));
send_notification(param, "metrics", buf);
}
// HTTP request handler function
void device_dashboard_fn(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
if (ev == MG_EV_HTTP_MSG) {
if (ev == MG_EV_OPEN && c->is_listening) {
mg_timer_add(c->mgr, 1000, MG_TIMER_REPEAT, timer_func, c->mgr);
} else if (ev == MG_EV_HTTP_MSG) {
struct mg_http_message *hm = (struct mg_http_message *) ev_data;
struct user *u = getuser(hm);
// MG_INFO(("%p [%.*s] auth %s", c->fd, (int) hm->uri.len, hm->uri.ptr,
@@ -97,14 +107,15 @@ void device_dashboard_fn(struct mg_connection *c, int ev, void *ev_data,
// Admins only
if (strcmp(u->name, "admin") == 0) {
if (update_config(hm, &s_config))
send_notification(fn_data, "config", NULL);
send_notification(fn_data, "config", "null");
mg_printf(c, "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");
} else {
mg_printf(c, "%s", "HTTP/1.1 403 Denied\r\nContent-Length: 0\r\n\r\n");
}
} else if (mg_http_match_uri(hm, "/api/message/send")) {
char buf[256];
if (mg_http_get_var(&hm->body, "message", buf, sizeof(buf)) > 0) {
if (mg_http_get_var(&hm->body, "message", buf + 1, sizeof(buf) - 2) > 0) {
buf[0] = buf[strlen(buf)] = '"';
send_notification(fn_data, "message", buf);
}
mg_printf(c, "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");
@@ -118,7 +129,7 @@ void device_dashboard_fn(struct mg_connection *c, int ev, void *ev_data,
mg_http_printf_chunk(c, "");
} else {
struct mg_http_serve_opts opts = {0};
#if 1
#if 0
opts.root_dir = "/web_root";
opts.fs = &mg_fs_packed;
#else