esp-idf: HTTP server problem (IDFGH-3874)

Environment

Development Kit:ESP32-Wrover-Kit Kit version DevKitC Module or chip used:ESP32-WROVER-B IDF version: 4.2 Build System: idf.py Compiler version xtensa-esp32-elf-gcc (crosstool-NG esp-2020r2) 8.2.0 Operating System: macOS Using an IDE?: Visual studio code Power Supply: USB

Problem Description

I am trying to create http server with websocket. I created a few endpoints. One for websocket connection and other to test HTTP GET POST requests. But when I try to make GET or POST request it open new socket and does not close it. I have a limited amount of socket connections and and that is the problem.

Expected Behavior

GET, POST request do not open new socket.

Steps to reproduce

1. Create http server and add some endpoint (you can copy from my example)
2. Add callback functions

        httpd_config_t config = HTTPD_DEFAULT_CONFIG();
        config.uri_match_fn = httpd_uri_match_wildcard;
        config.open_fn = on_open_socket;
        config.close_fn = on_close_socket;

esp_err_t on_open_socket(httpd_handle_t hd, int sockfd)
{
    clients++;
    ESP_LOGI(TAG, "socket opened: %d", sockfd);
    ESP_LOGI(TAG, "Clients: %d", clients);
    return ESP_OK;
}

void on_close_socket(httpd_handle_t hd, int sockfd)
{
    ESP_LOGE(TAG, "socket closed: %d", sockfd);
    if (clients > 0)
    {
       clients--;
    }
    
    ESP_LOGE(TAG, "Clients: %d", clients);
}

1. Use postman to make request.

Here i make one GET request to endpoint ‘/’

I (3022) WS HTTP SERVER: Server started.
I (15732) WS HTTP SERVER: socket opened: 57
I (15732) WS HTTP SERVER: Clients: 1
I (15732) WS HTTP SERVER: URL: /

Code to reproduce this issue

https://gist.github.com/benas1989/6780d76f88d8d316b994996bc3b87f4b