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Fixes #8135. Makes sure any exception thrown by Firefox when trying t… 

…o access an XMLHttpRequest property when a network error occured is caught and notified as an error. Added test/networkerror.html to test the behavior.
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@jaubourg
jaubourg committed Feb 2, 2011
1 parent 462bb1f commit b90369e8cb2b6f3cc0afa34d815958ff0b605874
Unified Split
Showing with 183 additions and 65 deletions.
  1. +82 −65 src/ajax/xhr.js
  2. +101 −0 test/networkerror.html
147 src/ajax/xhr.js
View file
@@ -115,76 +115,93 @@ if ( jQuery.support.ajax ) {
// Listener
callback = function( _, isAbort ) {

// Was never called and is aborted or complete
if ( callback && ( isAbort || xhr.readyState === 4 ) ) {

// Only called once
callback = 0;

// Do not keep as active anymore
if ( handle ) {
xhr.onreadystatechange = jQuery.noop;
delete xhrs[ handle ];
}

// If it's an abort
if ( isAbort ) {
// Abort it manually if needed
if ( xhr.readyState !== 4 ) {
xhr.abort();
var status,
statusText,
responseHeaders,
responses,
xml;

// Firefox throws exceptions when accessing properties
// of an xhr when a network error occured
// http://helpful.knobs-dials.com/index.php/Component_returned_failure_code:_0x80040111_(NS_ERROR_NOT_AVAILABLE)
try {

// Was never called and is aborted or complete
if ( callback && ( isAbort || xhr.readyState === 4 ) ) {

// Only called once
callback = undefined;

// Do not keep as active anymore
if ( handle ) {
xhr.onreadystatechange = jQuery.noop;
delete xhrs[ handle ];
}
} else {
// Get info
var status = xhr.status,
statusText,
responseHeaders = xhr.getAllResponseHeaders(),
responses = {},
xml = xhr.responseXML;

// Construct response list
if ( xml && xml.documentElement /* #4958 */ ) {
responses.xml = xml;
}
responses.text = xhr.responseText;

// Firefox throws an exception when accessing
// statusText for faulty cross-domain requests
try {
statusText = xhr.statusText;
} catch( e ) {
// We normalize with Webkit giving an empty statusText
statusText = "";
}
// If it's an abort
if ( isAbort ) {
// Abort it manually if needed
if ( xhr.readyState !== 4 ) {
xhr.abort();
}
} else {
// Get info
status = xhr.status;
responseHeaders = xhr.getAllResponseHeaders();
responses = {};
xml = xhr.responseXML;

// Filter status for non standard behaviors
status =
// Most browsers return 0 when it should be 200 for local files
// Opera returns 0 when it should be 304
// Webkit returns 0 for failing cross-domain no matter the real status
!status ?
// All: for local files, 0 is a success
( location.protocol === "file:" ? 200 : (
// Webkit, Firefox: filter out faulty cross-domain requests
!s.crossDomain || statusText ?
// Construct response list
if ( xml && xml.documentElement /* #4958 */ ) {
responses.xml = xml;
}
responses.text = xhr.responseText;

// Firefox throws an exception when accessing
// statusText for faulty cross-domain requests
try {
statusText = xhr.statusText;
} catch( e ) {
// We normalize with Webkit giving an empty statusText
statusText = "";
}

// Filter status for non standard behaviors
status =
// Most browsers return 0 when it should be 200 for local files
// Opera returns 0 when it should be 304
// Webkit returns 0 for failing cross-domain no matter the real status
!status ?
// All: for local files, 0 is a success
( location.protocol === "file:" ? 200 : (
// Webkit, Firefox: filter out faulty cross-domain requests
!s.crossDomain || statusText ?
(
// Opera: filter out real aborts #6060
responseHeaders ?
304 :
0
) :
// We assume 302 but could be anything cross-domain related
302
) ) :
(
// Opera: filter out real aborts #6060
responseHeaders ?
304 :
0
) :
// We assume 302 but could be anything cross-domain related
302
) ) :
(
// IE sometimes returns 1223 when it should be 204 (see #1450)
status == 1223 ?
204 :
status
);

// Call complete
complete( status, statusText, responses, responseHeaders );
// IE sometimes returns 1223 when it should be 204 (see #1450)
status == 1223 ?
204 :
status
);
}
}
} catch( firefoxAccessException ) {
if ( !isAbort ) {
complete( -1, firefoxAccessException );
}
}

// Call complete if needed
if ( responses ) {
complete( status, statusText, responses, responseHeaders );
}
};

101 test/networkerror.html
View file
@@ -0,0 +1,101 @@
<!DOCTYPE html>
<html>
<!--
Test for #8135
Thanks John Firebaugh for this test page based on his gist
https://gist.github.com/807090
Access this page through a web server, then stop said server and click the button.
-->
<head>
<title>
jQuery Network Error Test for Firefox
</title>
<style>
div { margin-top: 10px; }
</style>
<script src="../src/core.js"></script>
<script src="../src/support.js"></script>
<script src="../src/data.js"></script>
<script src="../src/queue.js"></script>
<script src="../src/attributes.js"></script>
<script src="../src/event.js"></script>
<script src="../src/sizzle/sizzle.js"></script>
<script src="../src/sizzle-jquery.js"></script>
<script src="../src/traversing.js"></script>
<script src="../src/manipulation.js"></script>
<script src="../src/css.js"></script>
<script src="../src/ajax.js"></script>
<script src="../src/ajax/jsonp.js"></script>
<script src="../src/ajax/script.js"></script>
<script src="../src/ajax/xhr.js"></script>
<script src="../src/effects.js"></script>
<script src="../src/offset.js"></script>
<script src="../src/dimensions.js"></script>
<script type="text/javascript">
$('button').live('click', function () {
$.ajax({
url: '/',
error: function() {
console.log( "abort", arguments );
}
}).abort();
$.ajax({
url: '/',
error: function() {
console.log( "complete", arguments );
}
});
return false;
})
</script>
</head>
<body>
<h1>
jQuery Network Error Test for Firefox
</h1>
<div>
This is a test page for
<a href="http://bugs.jquery.com/ticket/8135">
#8135
</a>
which was reported in Firefox when accessing properties
of an XMLHttpRequest object after a network error occured.
</div>
<div>Take the following steps:</div>
<ol>
<li>
make sure you accessed this page through a web server,
</li>
<li>
stop the web server,
</li>
<li>
open the console,
</li>
<li>
click this
<button>button</button>
,
</li>
<li>
wait for both requests to fail.
</li>
</ol>
<div>
Test passes if you get two log lines:
<ul>
<li>
the first starting with "abort",
</li>
<li>
the second starting with "complete",
</li>
</ul>
</div>
<div>
Test fails if the browser notifies an exception.
</div>
</body>
</html>

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