Merge branch 'feature/support_ws_handshake_callback' into 'master'

example: Identify the callback whether is hanshake or frame-receive by req->method

Closes IDFGH-4796 and IDFCI-488

See merge request espressif/esp-idf!12634

examples/protocols/http_server/ws_echo_server/main/ws_echo_server.c

@@ -67,6 +67,10 @@ static esp_err_t trigger_async_send(httpd_handle_t handle, httpd_req_t *req)
  */
 static esp_err_t echo_handler(httpd_req_t *req)
 {
+    if (req->method == HTTP_GET) {
+        ESP_LOGI(TAG, "Handshake done, the new connection was opened");
+        return ESP_OK;
+    }
     httpd_ws_frame_t ws_pkt;
     memset(&ws_pkt, 0, sizeof(httpd_ws_frame_t));
     ws_pkt.type = HTTPD_WS_TYPE_TEXT;

examples/protocols/https_server/wss_server/main/wss_server_example.c

@@ -33,6 +33,10 @@ static const size_t max_clients = 4;
 
 static esp_err_t ws_handler(httpd_req_t *req)
 {
+    if (req->method == HTTP_GET) {
+        ESP_LOGI(TAG, "Handshake done, the new connection was opened");
+        return ESP_OK;
+    }
     httpd_ws_frame_t ws_pkt;
     memset(&ws_pkt, 0, sizeof(httpd_ws_frame_t));