From ee3a9988a29a02b2ea9c29920c7a578b19ebbfba Mon Sep 17 00:00:00 2001
From: Les De Ridder <les@lesderid.net>
Date: Thu, 5 May 2016 17:14:33 +0200
Subject: [PATCH] Fix Pixiv support

---
 background.js | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/background.js b/background.js
index 5d4e88f..9a29514 100644
--- a/background.js
+++ b/background.js
@@ -124,15 +124,25 @@ function getBetterUrl(url, callback) {
 
 			var match = regex.exec(pageRequest.responseText);
 
-			var imageUrl = 'http://i3.pixiv.net/img-original/' + match[1] + match[2];
+			var imageUrl = 'http://i3.pixiv.net/img-original/' + match[1];
 
-			var imageRequest = new XMLHttpRequest();
-			imageRequest.open('GET', imageUrl, true); 
-			imageRequest.setRequestHeader('X-Pixiv-Referer', url);
-			imageRequest.onload = function () {
-				callback(imageUrl);		
+			var onload = function (imageRequest, extension) {
+				if(imageRequest.status == 404 && extension == "jpg") {
+					makerequest("png");
+				} else {
+					callback(imageUrl + "." + extension);
+				}
 			};
-			imageRequest.send();
+
+			var makerequest = function(extension) {
+				var imageRequest = new XMLHttpRequest();
+				imageRequest.open('GET', imageUrl + "." + extension, true); 
+				imageRequest.setRequestHeader('X-Pixiv-Referer', url);
+				imageRequest.onload = function() { onload(imageRequest, extension); };				
+				imageRequest.send();
+			};
+
+			makerequest("jpg");
 		};
 		pageRequest.send();
 	} else {