From e077ffb083743f4a4b990f586c9d25d787e7b417 Mon Sep 17 00:00:00 2001
From: Dave Methvin <dave.methvin@gmail.com>
Date: Sun, 15 Nov 2015 21:51:18 -0500
Subject: [PATCH] Ajax: Preserve URL hash on requests

Fixes gh-1732
Closes gh-2721
---
 src/ajax.js       | 28 ++++++++++++++++------------
 test/unit/ajax.js | 22 ++++++++++++++++++----
 2 files changed, 34 insertions(+), 16 deletions(-)

diff --git a/src/ajax.js b/src/ajax.js
index 27abe375e..195a30a20 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -415,6 +415,9 @@ jQuery.extend( {
 			// Loop variable
 			i,
 
+			// uncached part of the url
+			uncached,
+
 			// Create the final options object
 			s = jQuery.ajaxSetup( {}, options ),
 
@@ -516,11 +519,10 @@ jQuery.extend( {
 		// Attach deferreds
 		deferred.promise( jqXHR );
 
-		// Remove hash character (#7531: and string promotion)
 		// Add protocol if not provided (prefilters might expect it)
 		// Handle falsy url in the settings object (#10093: consistency with old signature)
 		// We also use the url parameter if available
-		s.url = ( ( url || s.url || location.href ) + "" ).replace( rhash, "" )
+		s.url = ( ( url || s.url || location.href ) + "" )
 			.replace( rprotocol, location.protocol + "//" );
 
 		// Alias method option to type as per ticket #12004
@@ -581,30 +583,32 @@ jQuery.extend( {
 
 		// Save the URL in case we're toying with the If-Modified-Since
 		// and/or If-None-Match header later on
-		cacheURL = s.url;
+		// Remove hash to simplify url manipulation
+		cacheURL = s.url.replace( rhash, "" );
 
 		// More options handling for requests with no content
 		if ( !s.hasContent ) {
 
+			// Remember the hash so we can put it back
+			uncached = s.url.slice( cacheURL.length );
+
 			// If data is available, append data to url
 			if ( s.data ) {
-				cacheURL = ( s.url += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data );
+				cacheURL += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data;
 
 				// #9682: remove data so that it's not used in an eventual retry
 				delete s.data;
 			}
 
-			// Add anti-cache in url if needed
+			// Add anti-cache in uncached url if needed
 			if ( s.cache === false ) {
-				s.url = rts.test( cacheURL ) ?
-
-					// If there is already a '_' parameter, set its value
-					cacheURL.replace( rts, "$1_=" + nonce++ ) :
-
-					// Otherwise add one to the end
-					cacheURL + ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + nonce++;
+				cacheURL = cacheURL.replace( rts, "" );
+				uncached = ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + ( nonce++ ) + uncached;
 			}
 
+			// Put hash and anti-cache on the URL that will be requested (gh-1732)
+			s.url = cacheURL + uncached;
+
 		// Change '%20' to '+' if this is encoded form body content (gh-2658)
 		} else if ( s.data && s.processData &&
 			( s.contentType || "" ).indexOf( "application/x-www-form-urlencoded" ) === 0 ) {
diff --git a/test/unit/ajax.js b/test/unit/ajax.js
index 12bf2ab31..f468f44a8 100644
--- a/test/unit/ajax.js
+++ b/test/unit/ajax.js
@@ -328,12 +328,12 @@ QUnit.module( "ajax", {
 		};
 	} );
 
-	ajaxTest( "jQuery.ajax() - hash", 3, function( assert ) {
+	ajaxTest( "jQuery.ajax() - hash", 4, function( assert ) {
 		return [
 			{
 				url: "data/name.html#foo",
 				beforeSend: function( xhr, settings ) {
-					assert.equal( settings.url, "data/name.html", "Make sure that the URL is trimmed." );
+					assert.equal( settings.url, "data/name.html#foo", "Make sure that the URL has its hash." );
 					return false;
 				},
 				error: true
@@ -341,7 +341,7 @@ QUnit.module( "ajax", {
 			{
 				url: "data/name.html?abc#foo",
 				beforeSend: function( xhr, settings ) {
-					assert.equal( settings.url, "data/name.html?abc", "Make sure that the URL is trimmed." );
+					assert.equal( settings.url, "data/name.html?abc#foo", "Make sure that the URL has its hash." );
 					return false;
 				},
 				error: true
@@ -352,7 +352,21 @@ QUnit.module( "ajax", {
 					"test": 123
 				},
 				beforeSend: function( xhr, settings ) {
-					assert.equal( settings.url, "data/name.html?abc&test=123", "Make sure that the URL is trimmed." );
+					assert.equal( settings.url, "data/name.html?abc&test=123#foo", "Make sure that the URL has its hash." );
+					return false;
+				},
+				error: true
+			},
+			{
+				url: "data/name.html?abc#brownies",
+				data: {
+					"devo": "hat"
+				},
+				cache: false,
+				beforeSend: function( xhr, settings ) {
+					// Remove the random number, but ensure the cashe-buster param is there
+					var url = settings.url.replace( /\d+/, "" );
+					assert.equal( url, "data/name.html?abc&devo=hat&_=#brownies", "Make sure that the URL has its hash." );
 					return false;
 				},
 				error: true