update examples

tutorials/http/device-dashboard/net.c

@@ -156,10 +156,10 @@ static void handle_settings_set(struct mg_connection *c, struct mg_str body) {
   settings.log_level = (int) mg_json_get_long(body, "$.log_level", 0);
   settings.brightness = mg_json_get_long(body, "$.brightness", 0);
   if (s && strlen(s) < MAX_DEVICE_NAME) {
-    free(settings.device_name);
+    mg_free(settings.device_name);
     settings.device_name = s;
   } else {
-    free(s);
+    mg_free(s);
   }
   s_settings = settings;  // Save to the device flash
   mg_http_reply(c, 200, s_json_header,

tutorials/http/uart-bridge/esp32/main/main.c

@@ -26,9 +26,9 @@ void app_main(void) {
     char *ssid = mg_json_get_str(json, "$.ssid");
     char *pass = mg_json_get_str(json, "$.pass");
     while (!wifi_init(ssid, pass)) (void) 0;
-    free(ssid);
-    free(pass);
-    free((void *) json.buf);
+    mg_free(ssid);
+    mg_free(pass);
+    mg_free((void *) json.buf);
   } else {
     // If WiFi is not configured, run CLI until configured
     MG_INFO(("WiFi is not configured, running CLI. Press enter"));

tutorials/http/uart-bridge/net.c

@@ -157,7 +157,7 @@ static void timer_fn(void *param) {
 static void update_string(struct mg_str json, const char *path, char **value) {
   char *jval;
   if ((jval = mg_json_get_str(json, path)) != NULL) {
-    free(*value);
+    mg_free(*value);
     *value = strdup(jval);
   }
 }
@@ -189,7 +189,7 @@ void uart_bridge_fn(struct mg_connection *c, int ev, void *ev_data) {
   if (ev == MG_EV_OPEN && c->is_listening) {
     struct mg_str config = mg_file_read(&mg_fs_posix, "config.json");
     if (config.buf != NULL) config_apply(config);
-    free(config.buf);
+    mg_free(config.buf);
     s_state.tcp.url = strdup(DEFAULT_TCP);
     s_state.websocket.url = strdup(DEFAULT_WEBSOCKET);
     s_state.mqtt.url = strdup(DEFAULT_MQTT);

tutorials/http/video-stream/main.c

@@ -44,7 +44,7 @@ static void broadcast_mjpeg_frame(struct mg_mgr *mgr) {
     mg_send(c, data.buf, data.len);
     mg_send(c, "\r\n", 2);
   }
-  free((void *) data.buf);
+  mg_free((void *) data.buf);
 }
 
 static void timer_callback(void *arg) {