Fixes #7465. Reworked the regexp and associated test for cross-domain...

Fixes #7465. Reworked the regexp and associated test for cross-domain detection so that it now includes ports. Added cross-domain detection tests for protocol, hostname and port.

src/ajax.js

@@ -10,7 +10,7 @@ var r20 = /%20/g,
 	rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
 	rselectTextarea = /^(?:select|textarea)/i,
 	rts = /([?&])_=[^&]*/,
-	rurl = /^(\w+:)?\/\/([^\/?#]+)/,
+	rurl = /^(\w+:)?\/\/([^\/?#:]+)(?::(\d+))?/,
 
 	// Slice function
 	sliceFunc = Array.prototype.slice,
@@ -520,7 +520,12 @@ jQuery.extend({
 		// Determine if a cross-domain request is in order
 		var parts = rurl.exec( s.url.toLowerCase() ),
 			loc = location;
-		s.crossDomain = !!( parts && ( parts[ 1 ] && parts[ 1 ] != loc.protocol || parts[ 2 ] != loc.host ) );
+		s.crossDomain = !!(
+				parts &&
+				( parts[ 1 ] && parts[ 1 ] != loc.protocol ||
+					parts[ 2 ] != loc.hostname ||
+					( parts[ 3 ] || 80 ) != ( loc.port || 80 ) )
+		);
 
 		// Convert data if not already a string
 		if ( s.data && s.processData && typeof s.data != "string" ) {

test/unit/ajax.js

@@ -358,6 +358,58 @@ test(".ajax() - hash", function() {
 	});
 });
 
+test("jQuery ajax - cross-domain detection", function() {
+
+	expect( 3 );
+
+	var loc = document.location,
+		otherPort = loc.port === 666 ? 667 : 666,
+		otherProtocol = loc.protocol === "http:" ? "https:" : "http:",
+		protocolFlag,
+		hostFlag,
+		portFlag;
+
+	if ( jQuery.ajax({
+		url: otherProtocol + "//" + loc.host,
+		beforeSend: function( _ , s ) {
+			protocolFlag = 1;
+			ok( s.crossDomain , "Test different protocols are detected as cross-domain" );
+			return false;
+		}
+	}) === false ) {
+		if ( ! protocolFlag ) {
+			ok( ! jQuery.support.cors , "Test different protocols are detected as cross-domain (no transport)" );
+		}
+	}
+
+	if ( jQuery.ajax({
+		url: loc.protocol + '//somewebsitethatdoesnotexist-656329477541.com:' + ( loc.port || 80 ),
+		beforeSend: function( _ , s ) {
+			hostFlag = 1;
+			ok( s.crossDomain , "Test different hostnames are detected as cross-domain" );
+			return false;
+		}
+	}) === false ) {
+		if ( ! hostFlag ) {
+			ok( ! jQuery.support.cors , "Test different hostnames are detected as cross-domain (no transport)" );
+		}
+	}
+
+	if ( jQuery.ajax({
+		url: loc.protocol + "//" + loc.hostname + ":" + otherPort,
+		beforeSend: function( _ , s ) {
+			portFlag = 1;
+			ok( s.crossDomain , "Test different ports are detected as cross-domain" );
+			return false;
+		}
+	}) === false ) {
+		if ( ! portFlag ) {
+			ok( ! jQuery.support.cors , "Test different ports are detected as cross-domain (no transport)" );
+		}
+	}
+
+});
+
 test(".ajax() - 304", function() {
 	expect( 1 );
 	stop();