X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fajax.js;h=6414e8c2990e8e9d07a4cfce056a1b896c1b2522;hb=5b38439011799ae53156d137305d9440e0cddb0a;hp=76a2dc81236923dabd9a01073b8e932ce379429a;hpb=faa6fe32f72900d7b31000caead2794a8346f6d8;p=jquery.git

diff --git a/src/ajax.js b/src/ajax.js
index 76a2dc8..6414e8c 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