From cfe10c5532d535ffdaf703d656934c53474ab0d5 Mon Sep 17 00:00:00 2001
From: Les De Ridder <les@lesderid.net>
Date: Tue, 14 Jun 2016 05:38:20 +0200
Subject: [PATCH] Add gfycat support

---
 background.js | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/background.js b/background.js
index 409c4bf..53b2175 100644
--- a/background.js
+++ b/background.js
@@ -96,7 +96,7 @@ function getBetterUrl(url, callback) {
 		url = url.replace("gifv", "mp4");
 	}
 
-	if(isTwitterUrl(url)) {
+	if(isTwitterImageUrl(url)) {
 		if(url.indexOf(':') != url.lastIndexOf(':')) { //Match if there are occurences of ':' other than the ':' in 'https://', such as in '.jpg:large'
 			url = url.substr(0, url.lastIndexOf(':'));
 		}
@@ -154,6 +154,19 @@ function getBetterUrl(url, callback) {
 		url = url + '/imgpsh_fullsize';
 
 		callback(url);
+	} else if(isGfycatUrl(url)) {
+		var id = url.substr(url.lastIndexOf('/') + 1);
+
+		var request = new XMLHttpRequest();
+		request.open('GET', 'http://gfycat.com/cajax/get/' + id, true);
+		request.onload = function () {
+			var json = JSON.parse(request.responseText);
+
+			var webmUrl = json.gfyItem.webmUrl;
+
+			callback(webmUrl);
+		};
+		request.send();
 	} else {
 		callback(url);
 	}
@@ -194,7 +207,7 @@ function cleanExtension(url) {
 	return url;
 }
 
-function isTwitterUrl(url) {
+function isTwitterImageUrl(url) {
 	return url.indexOf('pbs.twimg.com/media/') != -1;	
 }
 
@@ -210,6 +223,10 @@ function isSkypeUrl(url) {
 	return url.indexOf('api.asm.skype.com/v1/objects/') != -1;
 }
 
+function isGfycatUrl(url) {
+	return url.indexOf('gfycat.com/') != -1;
+}
+
 function isCoolUrl(url, callback) {
 	url = url.toLowerCase();