Finally commit ext for purging varnish on-demand

ext/varnish/main.php

@@ -0,0 +1,38 @@
+<?php
+/*
+* Name: Varnish Purger
+* Author: Shish <webmaster@shishnet.org>
+* License: GPLv2
+* Visibility: admin
+* Description: Sends PURGE requests when a /post/view is updated
+*/
+
+class VarnishPurger extends Extension {
+	private function curl_purge($path) {
+		$url = make_http(make_link($path));
+		$ch = curl_init();
+		curl_setopt($ch, CURLOPT_URL,$url);
+		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PURGE");
+		$result = curl_exec($ch);
+		$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+		curl_close($ch);
+		return $result;
+	}
+
+	public function onCommentPosting(CommentPostingEvent $event) {
+		$this->curl_purge("post/view/{$event->image_id}");
+	}
+
+	public function onImageInfoSet(ImageInfoSetEvent $event) {
+		$this->curl_purge("post/view/{$event->image->id}");
+	}
+
+	public function onImageDeletion(ImageDeletionEvent $event) {
+		$this->curl_purge("post/view/{$event->image->id}");
+	}
+
+	/**
+	 * @return int
+	 */
+	public function get_priority() {return 99;}
+}