initial commit

README.md

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 # pixelfed-imgproxy-apache2
 
-Media proxy project for pixelfed. This project makes images, videos from remote pixelfed instances URLs proxied through the homeserver.
+Media proxy project for pixelfed. This project makes images, 
+videos from remote pixelfed instances URLs proxied through the homeserver.
+
+
+## Installation (standalone)
+
+Copy the code to your pixelfed installation
+```bash
+cp -a imgproxy /var/www/public/imgproxy
+```
+
+Add the following lines in your apache Virtualhost configuration 
+(replace pixel.nogafam.es to your instance URL)
+```apache2
+AddOutputFilterByType SUBSTITUTE application/json
+Substitute "s@(?<=\")https:\\\/\\\/[^\"]+\.(png|jpg|jpeg)@https:\\\/\\\/pixel.nogafam.es\\\/imgproxy\\\/?url=$0@i"
+Substitute "s@(?<=\")https://[^\"]+\.(png|jpg|jpeg)@https://pixel.nogafam.es/imgproxy/?url=$0@i"
+```
+
+Enable `mod_substitute` on Apache
+```bash
+a2enmod substitute
+```
+
+

imgproxy/index.php

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+<?php
+
+$url = trim($_GET['url']);
+
+# check url matches a https://domain/storage/whatever.jpeg url for images
+if (preg_match('/^https:\/\/[^\/]+\/storage\/[^\s\%]+\.(png|jpg|jpeg)(\?v=[^\&])?$/', $url)) {
+	if (preg_match('/^.*\.png(\?v=[^\&])?$/', $url))
+		header('Content-Type: image/png');
+	else if (preg_match('/^.*\.(jpg|jpeg)(\?v=[^\&])?$/', $url))
+		header('Content-Type: image/jpeg');
+	echo file_get_contents($url);
+}
+
+?>