From 5b38439011799ae53156d137305d9440e0cddb0a Mon Sep 17 00:00:00 2001
From: jaubourg <j@ubourg.net>
Date: Thu, 17 Feb 2011 17:03:09 +0100
Subject: Fixes #8297. Makes sure response headers with empty values are
 handled properly and do not prevent proper parsing of the entire response
 headers string. Unit test amended.

---
 src/ajax.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/ajax.js')

diff --git a/src/ajax.js b/src/ajax.js
index 76a2dc812..6414e8c29 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -4,7 +4,7 @@ var r20 = /%20/g,
 	rbracket = /\[\]$/,
 	rCRLF = /\r?\n/g,
 	rhash = /#.*$/,
-	rheaders = /^(.*?):\s*(.*?)\r?$/mg, // IE leaves an \r character at EOL
+	rheaders = /^(.*?):[ \t]*([^\r\n]*)\r?$/mg, // IE leaves an \r character at EOL
 	rinput = /^(?:color|date|datetime|email|hidden|month|number|password|range|search|tel|text|time|url|week)$/i,
 	// #7653, #8125, #8152: local protocol detection
 	rlocalProtocol = /(?:^file|^widget|\-extension):$/,
@@ -439,7 +439,7 @@ jQuery.extend({
 						}
 						match = responseHeaders[ key.toLowerCase() ];
 					}
-					return match || null;
+					return match === undefined ? null : match;
 				},
 
 				// Overrides response content-type header
-- 
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