From a563b61a347f7aa0ea7757fcc37f23ad77f1778d Mon Sep 17 00:00:00 2001
From: Zach Waugh <zwaugh@gmail.com>
Date: Sat, 9 Feb 2013 11:49:06 -0500
Subject: [PATCH] Ensure content type for path extension doesn't return null

---
 AFNetworking/AFHTTPClient.m | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/AFNetworking/AFHTTPClient.m b/AFNetworking/AFHTTPClient.m
index c990e13..d745143 100644
--- a/AFNetworking/AFHTTPClient.m
+++ b/AFNetworking/AFHTTPClient.m
@@ -742,7 +742,12 @@ static inline NSString * AFMultipartFormFinalBoundary() {
 static inline NSString * AFContentTypeForPathExtension(NSString *extension) {
 #ifdef __UTTYPE__
     NSString *UTI = (__bridge_transfer NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)extension, NULL);
-    return (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)UTI, kUTTagClassMIMEType);
+    NSString *contentType = (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)UTI, kUTTagClassMIMEType);
+    if (!contentType) {
+        return @"application/octet-stream";
+    } else {
+        return contentType;
+    }
 #else
     return @"application/octet-stream";
 #endif