From 9af7460f2bf4fe10c84afa6e37f93f49e444bf08 Mon Sep 17 00:00:00 2001
From: Greg Hazel <ghazel@gmail.com>
Date: Sat, 6 Dec 2014 13:06:29 -0800
Subject: [PATCH] append the original path extension to the hash filename.
 closes #967

---
 SDWebImage/SDImageCache.m | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/SDWebImage/SDImageCache.m b/SDWebImage/SDImageCache.m
index 36bb751a..37979676 100644
--- a/SDWebImage/SDImageCache.m
+++ b/SDWebImage/SDImageCache.m
@@ -134,8 +134,9 @@ BOOL ImageDataHasPNGPreffix(NSData *data) {
     }
     unsigned char r[CC_MD5_DIGEST_LENGTH];
     CC_MD5(str, (CC_LONG)strlen(str), r);
-    NSString *filename = [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
-                                                    r[0], r[1], r[2], r[3], r[4], r[5], r[6], r[7], r[8], r[9], r[10], r[11], r[12], r[13], r[14], r[15]];
+    NSString *filename = [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x.%@",
+                                                    r[0], r[1], r[2], r[3], r[4], r[5], r[6], r[7], r[8], r[9], r[10], r[11], r[12], r[13], r[14], r[15],
+                                                    [key pathExtension]];
 
     return filename;
 }