ESP32 integration and refactoring from the ESP8266 is done. Uses XBM thumbnail rendering as a response from PHP Upload endpoint if you want to use a Board with Oled.  Please refer to this issue to see the JSON example: 

https://github.com/martinberlin/FS2/issues/2

The PHP upload endpoint is here in upload-xbm.php : https://github.com/martinberlin/php-gallery
PHP Gallery is also a small Bootstrap 4 photo uploader and mini preview that is ready to receive the WiFi upload from the camera.