httpAsyncClientGet

const char HTTPSERVER_GET_REQUEST_TEMPLATE[] PROGMEM = 
    "GET %s HTTP/1.1\r\n"
    "Host: %s\r\n"
    "User-Agent: KIOTDevice\r\n"
    "Connection: keep-alive\r\n"
    "Content-Type: application/json\r\n"
    "\r\n";

void _httpGetRaw(String path) {
    if (_http_client == NULL) {
        _http_client = new AsyncClient();
    }

    _http_client->onDisconnect([](void *s, AsyncClient *c) {
        DEBUG_MSG_P(PSTR("[HTTPSERVER] Disconnected\n"));
        if(NULL != _http_client){
            _http_client->free();
            delete _http_client;
            _http_client = NULL;
        }
    }, 0);

    _http_client->onTimeout([](void *s, AsyncClient *c, uint32_t time) {
        if(NULL != _http_client){
            _http_client->close(true);
        }
    }, 0);

    _http_client->onData([](void * arg, AsyncClient * c, void * response, size_t len) {
        char * b = (char *) response;
        b[len] = 0;
        char * p = strstr((char *)response, "\r\n\r\n");
        unsigned int code = (p != NULL) ? atoi(&p[4]) : 0;
        Serial.println((char *)response);
        DEBUG_MSG_P(PSTR("[HTTPSERVER] Response value: %d\n"), code);
        if(NULL != _http_client){
            _http_client->close(true);
        }
    }, NULL);

    _http_client->onConnect([](void * arg, AsyncClient * client) {
        char buffer[strlen_P(HTTPSERVER_GET_REQUEST_TEMPLATE) + strlen(HTTPSERVER_URL) + strlen(HTTPSERVER_HOST) ];
        snprintf_P(buffer, sizeof(buffer),
            HTTPSERVER_GET_REQUEST_TEMPLATE,
            HTTPSERVER_URL,
            HTTPSERVER_HOST
        );
        Serial.println(buffer);

        client->write(buffer);

    }, NULL);


    bool connected = _http_client->connect(HTTPSERVER_HOST, HTTPSERVER_PORT);

    if (!connected) {
        DEBUG_MSG_P(PSTR("[HTTPSERVER] Connection failed\n"));
        _http_client->close(true);
    }

}