From 39eca05b91d0ca344db755dfefb590472485cbf7 Mon Sep 17 00:00:00 2001
From: Maarten Schumacher <maartenschumacher@gmail.com>
Date: Tue, 7 Jun 2016 12:00:29 -0700
Subject: [PATCH] Handle the case where redirect URL is relative
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Summary:
While trying to download an image I encountered an error:

![screen shot 2016-05-31 at 13 58 54](https://cloud.githubusercontent.com/assets/10407025/15799726/a7bcbf1c-2a5d-11e6-926a-b2f84e011258.png)

As you can see the domain name is missing from the URL. I traced it back to a method which handles redirects. It would retrieve the redirect URL from the `Location` header field, but it didn’t handle the case where `Location` contains a relative URL (which [according to the RFC spec](https://tools.ietf.org/html/rfc7231#section-7.1.2), is allowed).
Closes https://github.com/facebook/react-native/pull/7926

Differential Revision: D3399531

Pulled By: nicklockwood

fbshipit-source-id: ffbd5e9fc55b1737a8ff6a9bcc06fb1f9f19d093
---
 Libraries/Image/RCTImageLoader.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Libraries/Image/RCTImageLoader.m b/Libraries/Image/RCTImageLoader.m
index 3aefdb0c6..661f6bf11 100644
--- a/Libraries/Image/RCTImageLoader.m
+++ b/Libraries/Image/RCTImageLoader.m
@@ -397,7 +397,7 @@ static UIImage *RCTResizeImageIfNeeded(UIImage *image,
             return;
           }
 
-          NSURL *redirectURL = [NSURL URLWithString: location];
+          NSURL *redirectURL = [NSURL URLWithString: location relativeToURL: request.URL];
           request = [NSURLRequest requestWithURL:redirectURL];
           cachedResponse = [_URLCache cachedResponseForRequest:request];
           continue;