From 8c5b4fb2980e8ea4427a6b0238e552c0539be0a6 Mon Sep 17 00:00:00 2001
From: Thong Nguyen <tumtumtum@gmail.com>
Date: Wed, 12 Feb 2014 19:53:21 +0000
Subject: [PATCH] Fixed openForSeek on STKHTTPDataSource potentially handling
 old URLs if URL provider is async

---
 StreamingKit/StreamingKit/STKHTTPDataSource.m | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/StreamingKit/StreamingKit/STKHTTPDataSource.m b/StreamingKit/StreamingKit/STKHTTPDataSource.m
index 2c9d97b..862ab64 100644
--- a/StreamingKit/StreamingKit/STKHTTPDataSource.m
+++ b/StreamingKit/StreamingKit/STKHTTPDataSource.m
@@ -42,6 +42,8 @@
     long long relativePosition;
     long long fileLength;
     int discontinuous;
+	int requestSerialNumber;
+
     NSURL* currentUrl;
     STKAsyncURLProvider asyncUrlProvider;
     NSDictionary* httpHeaders;
@@ -262,8 +264,18 @@
 
 -(void) openForSeek:(BOOL)forSeek
 {
+	int localRequestSerialNumber;
+	
+	requestSerialNumber++;
+	localRequestSerialNumber = requestSerialNumber;
+	
     asyncUrlProvider(self, forSeek, ^(NSURL* url)
     {
+		if (localRequestSerialNumber != self->requestSerialNumber)
+		{
+			return;
+		}
+		
         self->currentUrl = url;
 
         if (url == nil)