From 7ff74dd81ccfa76d65001d4120b32ba9f2d2446f Mon Sep 17 00:00:00 2001
From: Nic Bellamy 
Date: Wed, 9 Jun 2010 13:06:38 +1200
Subject: [PATCH] Fix jQuery.ajax() success function being called when HTTP connection refused.

Fix a bug introduced in commit c3c94823f27ee1e935586d46fd86f055f3a3d97d whereby
an AJAX request that was refused by the server at the TCP level (ie. connection
refused) would call the success function with null data.

Opera returns 0 when HTTP status is 304 _or_ when the connection to the server
is refused. Other browsers return 0 when the connection to the server is
refused, and return 304 status correctly.
---
 jquery-1.4.2.js |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/jquery-1.4.2.js b/jquery-1.4.2.js
index fff6776..3cf7f59 100644
--- a/jquery-1.4.2.js
+++ b/jquery-1.4.2.js
@@ -5320,7 +5320,13 @@ jQuery.extend({
 			return !xhr.status && location.protocol === "file:" ||
 				// Opera returns 0 when status is 304
 				( xhr.status >= 200 && xhr.status < 300 ) ||
-				xhr.status === 304 || xhr.status === 1223 || xhr.status === 0;
+				xhr.status === 304 || xhr.status === 1223 ||
+				// Opera returns 0 when HTTP status is 304 _or_
+				// when the connection to the server is
+				// refused. Other browsers return 0 when the
+				// connection to the server is refused, and
+				// return 304 status correctly.
+				(jQuery.browser.opera && xhr.status === 0);
 		} catch(e) {}
 
 		return false;
@@ -5340,7 +5346,10 @@ jQuery.extend({
 		}
 
 		// Opera returns 0 when status is 304
-		return xhr.status === 304 || xhr.status === 0;
+		return xhr.status === 304 ||
+			// Opera returns 0 when HTTP status is 304 _or_ when
+			// the connection to the server is refused.
+			(jQuery.browser.opera && xhr.status === 0);
 	},
 
 	httpData: function( xhr, type, s ) {
-- 
1.7.1