Serve thumbnails of Twitch profile images. Thumbs are generated on-demand and cached.

Clone the repo, give write access to your server/php-fpm on the generated folder and you're good to go.

It's better to have clean URLs to work well with all kinds of proxies. You can turn the default ?src=profileimage.png into a cleaner /profileimage.png.

An Apache .htaccess file is already there, it does some surface validation to just 404 on invalid URLs.

For Lighttpd you can use the following:

url.rewrite-once = (
  "^/([a-zA-Z0-9%\-_\.]+.(jpg|jpeg|png))$" => "/index.php?src=$1"
)

You can just edit the top of index.php to change the path to the folder where generated thumbs are put and to change the size of the thumbnail.

Simply pass the filename of the profile image and you'll get a raw thumbnail back.

For instance:

<img src="http://twitchthumbs/nicktron-profile_image-ef3f5b4d21b16f4d-300x300.jpeg">

Exception: users with a defaut profile image use xarth/404_user_300x300.png, don't just pass 404_user_300x300.png, you need to urlencode the full string.

if we didn't cache this thumbnail:
  make 100% sure the request is for a Twitch profile image (to avoid any sort of exploit)
  load the image from Twitch
  generate a local thumbnail

if the browser already has the thumbnail:
  tell him to use that, thumbs never expire

return the raw thumbnail

TwitchThumbs, a simple script to generate thumbnails of Twitch profile images. Copyright (C) 2015 Benjamin Maisonnas

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License version 3 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/gpl-3.0.en.html.