Merge branch 'bugfix/fix_http_client_async_mode_v5.1' into 'release/v…

…5.1'

fix(esp_http_client): Fix esp_http_client async mode (v5.1)

See merge request espressif/esp-idf!27514

components/esp_http_client/esp_http_client.c

@@ -1110,7 +1110,12 @@ static int esp_http_client_get_data(esp_http_client_handle_t client)
 
     int rlen = esp_transport_read(client->transport, res_buffer->data, client->buffer_size_rx, client->timeout_ms);
     if (rlen >= 0) {
-        http_parser_execute(client->parser, client->parser_settings, res_buffer->data, rlen);
+        // When tls error is ESP_TLS_ERR_SSL_WANT_READ (-0x6900), esp_trasnport_read returns ERR_TCP_TRANSPORT_CONNECTION_TIMEOUT (0x0).
+        // We should not execute http_parser_execute() on this condition as it sets the internal state machine in an
+        // invalid state.
+        if (!(client->is_async && rlen == 0)) {
+            http_parser_execute(client->parser, client->parser_settings, res_buffer->data, rlen);
+        }
     }
     return rlen;
 }