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Fixes #2994. Not finding a transport now fires the error callbacks and doesn't make ajax return false. Had to revise how jsonp and script prefilters & transports work (better separation of concerns). Also took the opportunity to revise jXHR getRequestHeader and abort methods and enabled early transport garbage collection when the request completes.

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This commit is contained in:
jaubourg 2011-01-16 02:57:39 +01:00
parent d9cb69873c
commit 8ab23aec2c
4 changed files with 129 additions and 128 deletions
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154
src/ajax.js
View file

@ -306,30 +306,35 @@ jQuery.extend({
// (match is used internally)
getResponseHeader: function( key , match ) {
if ( state !== 2 ) {
return null;
}
if ( state === 2 ) {
if ( responseHeaders === undefined ) {
if ( responseHeaders === undefined ) {
responseHeaders = {};
responseHeaders = {};
if ( typeof responseHeadersString === "string" ) {
if ( typeof responseHeadersString === "string" ) {
while( ( match = rheaders.exec( responseHeadersString ) ) ) {
responseHeaders[ match[ 1 ].toLowerCase() ] = match[ 2 ];
while( ( match = rheaders.exec( responseHeadersString ) ) ) {
responseHeaders[ match[ 1 ].toLowerCase() ] = match[ 2 ];
}
}
}
match = responseHeaders[ key.toLowerCase() ];
} else {
match = null;
}
return responseHeaders[ key.toLowerCase() ];
return match;
},
// Cancel the request
abort: function( statusText ) {
if ( transport && state !== 2 ) {
if ( transport ) {
transport.abort( statusText || "abort" );
done( 0 , statusText );
}
done( 0 , statusText );
return this;
}
};
@ -347,6 +352,10 @@ jQuery.extend({
// State is "done" now
state = 2;
// Dereference transport for early garbage collection
// (no matter how long the jXHR transport will be used
transport = 0;
// Set readyState
jXHR.readyState = status ? 4 : 0;
@ -599,84 +608,87 @@ jQuery.extend({
s.data = jQuery.param( s.data , s.traditional );
}
// Get transport
transport = jQuery.ajaxPrefilter( s , options ).ajaxTransport( s );
// Apply prefilters
jQuery.ajaxPrefilter( s , options );
// Watch for a new set of requests
if ( s.global && jQuery.active++ === 0 ) {
jQuery.event.trigger( "ajaxStart" );
}
// If no transport, we auto-abort
if ( ! transport ) {
// More options handling for requests with no content
if ( ! s.hasContent ) {
done( 0 , "transport not found" );
jXHR = false;
// If data is available, append data to url
if ( s.data ) {
s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.data;
}
// Add anti-cache in url if needed
if ( s.cache === false ) {
var ts = jQuery.now(),
// try replacing _= if it is there
ret = s.url.replace( rts , "$1_=" + ts );
// if nothing was replaced, add timestamp to the end
s.url = ret + ( (ret == s.url ) ? ( rquery.test( s.url ) ? "&" : "?" ) + "_=" + ts : "");
}
}
// Set the correct header, if data is being sent
if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
requestHeaders[ "content-type" ] = s.contentType;
}
// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
if ( s.ifModified ) {
if ( jQuery_lastModified[ s.url ] ) {
requestHeaders[ "if-modified-since" ] = jQuery_lastModified[ s.url ];
}
if ( jQuery_etag[ s.url ] ) {
requestHeaders[ "if-none-match" ] = jQuery_etag[ s.url ];
}
}
// Set the Accepts header for the server, depending on the dataType
requestHeaders.accept = s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?
s.accepts[ s.dataTypes[ 0 ] ] + ( s.dataTypes[ 0 ] !== "*" ? ", */*; q=0.01" : "" ) :
s.accepts[ "*" ];
// Check for headers option
for ( i in s.headers ) {
requestHeaders[ i.toLowerCase() ] = s.headers[ i ];
}
// Allow custom headers/mimetypes and early abort
if ( s.beforeSend && ( s.beforeSend.call( callbackContext , jXHR , s ) === false || state === 2 ) ) {
// Abort if not done already
done( 0 , "abort" );
// Return false
jXHR = false;
} else {
// More options handling for requests with no content
if ( ! s.hasContent ) {
// If data is available, append data to url
if ( s.data ) {
s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.data;
}
// Add anti-cache in url if needed
if ( s.cache === false ) {
var ts = jQuery.now(),
// try replacing _= if it is there
ret = s.url.replace( rts , "$1_=" + ts );
// if nothing was replaced, add timestamp to the end
s.url = ret + ( (ret == s.url ) ? ( rquery.test( s.url ) ? "&" : "?" ) + "_=" + ts : "");
}
// Install callbacks on deferreds
for ( i in { success:1, error:1, complete:1 } ) {
jXHR[ i ]( s[ i ] );
}
// Set the correct header, if data is being sent
if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
requestHeaders[ "content-type" ] = s.contentType;
}
// Get transport
transport = jQuery.ajaxTransport( s );
// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
if ( s.ifModified ) {
if ( jQuery_lastModified[ s.url ] ) {
requestHeaders[ "if-modified-since" ] = jQuery_lastModified[ s.url ];
}
if ( jQuery_etag[ s.url ] ) {
requestHeaders[ "if-none-match" ] = jQuery_etag[ s.url ];
}
}
// If no transport, we auto-abort
if ( ! transport ) {
// Set the Accepts header for the server, depending on the dataType
requestHeaders.accept = s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?
s.accepts[ s.dataTypes[ 0 ] ] + ( s.dataTypes[ 0 ] !== "*" ? ", */*; q=0.01" : "" ) :
s.accepts[ "*" ];
// Check for headers option
for ( i in s.headers ) {
requestHeaders[ i.toLowerCase() ] = s.headers[ i ];
}
// Allow custom headers/mimetypes and early abort
if ( s.beforeSend && ( s.beforeSend.call( callbackContext , jXHR , s ) === false || state === 2 ) ) {
// Abort if not done already
done( 0 , "abort" );
jXHR = false;
done( 0 , "notransport" );
} else {
// Set state as sending
state = 1;
jXHR.readyState = 1;
// Install callbacks on deferreds
for ( i in { success:1, error:1, complete:1 } ) {
jXHR[ i ]( s[ i ] );
}
state = jXHR.readyState = 1;
// Send global event
if ( s.global ) {

71
src/ajax/jsonp.js
View file

@ -11,9 +11,7 @@ jQuery.ajaxSetup({
return "jsonp" + jsc++;
}
// Normalize jsonp queries
// 1) put callback parameter in url or data
// 2) sneakily ensure transportDataType is always jsonp for jsonp requests
// Detect, normalize options and install callbacks for jsonp requests
}).ajaxPrefilter("json jsonp", function(s, originalSettings) {
if ( s.dataTypes[ 0 ] === "jsonp" ||
@ -22,8 +20,10 @@ jQuery.ajaxSetup({
jsre.test(s.url) ||
typeof(s.data) === "string" && jsre.test(s.data) ) {
var jsonpCallback = s.jsonpCallback =
var responseContainer,
jsonpCallback = s.jsonpCallback =
jQuery.isFunction( s.jsonpCallback ) ? s.jsonpCallback() : s.jsonpCallback,
previous = window[ jsonpCallback ],
url = s.url.replace(jsre, "$1" + jsonpCallback + "$2"),
data = s.url === url && typeof(s.data) === "string" ? s.data.replace(jsre, "$1" + jsonpCallback + "$2") : s.data;
@ -33,51 +33,42 @@ jQuery.ajaxSetup({
s.url = url;
s.data = data;
s.dataTypes[ 0 ] = "jsonp";
}
// Bind transport to jsonp dataType
}).ajaxTransport("jsonp", function(s) {
window [ jsonpCallback ] = function( response ) {
responseContainer = [response];
};
// Put callback in place
var responseContainer,
jsonpCallback = s.jsonpCallback,
previous = window[ jsonpCallback ];
s.complete = [function() {
window [ jsonpCallback ] = function( response ) {
responseContainer = [response];
};
// Set callback back to previous value
window[ jsonpCallback ] = previous;
s.complete = [function() {
// Set callback back to previous value
window[ jsonpCallback ] = previous;
// Call if it was a function and we have a response
if ( previous) {
if ( responseContainer && jQuery.isFunction ( previous ) ) {
window[ jsonpCallback ] ( responseContainer[0] );
// Call if it was a function and we have a response
if ( previous) {
if ( responseContainer && jQuery.isFunction ( previous ) ) {
window[ jsonpCallback ] ( responseContainer[0] );
}
} else {
// else, more memory leak avoidance
try{ delete window[ jsonpCallback ]; } catch(e){}
}
} else {
// else, more memory leak avoidance
try{ delete window[ jsonpCallback ]; } catch(e){}
}
}, s.complete ];
}, s.complete ];
// Sneakily ensure this will be handled as json
s.dataTypes[ 0 ] = "json";
// Use data converter to retrieve json after script execution
s.converters["script json"] = function() {
if ( ! responseContainer ) {
jQuery.error( jsonpCallback + " was not called" );
}
return responseContainer[ 0 ];
};
// Use data converter to retrieve json after script execution
s.converters["script json"] = function() {
if ( ! responseContainer ) {
jQuery.error( jsonpCallback + " was not called" );
}
return responseContainer[ 0 ];
};
// force json dataType
s.dataTypes[ 0 ] = "json";
// Delegate to script transport
return "script";
// Delegate to script
return "script";
}
});
})( jQuery );

16
src/ajax/script.js
View file

@ -15,18 +15,22 @@ jQuery.ajaxSetup({
"text script": jQuery.globalEval
}
// Bind script tag hack transport
}).ajaxTransport("script", function(s) {
// Handle cache's special case and global
}).ajaxPrefilter("script", function(s) {
// Handle cache special case
if ( s.cache === undefined ) {
s.cache = false;
}
// This transport only deals with cross domain get requests
if ( s.crossDomain && s.async && ( s.type === "GET" || ! s.data ) ) {
if ( s.crossDomain ) {
s.global = false;
}
// Bind script tag hack transport
}).ajaxTransport("script", function(s) {
// This transport only deals with cross domain requests
if ( s.crossDomain ) {
var script,
head = document.getElementsByTagName("head")[0] || document.documentElement;

16
test/unit/ajax.js
View file

@ -1865,25 +1865,19 @@ test("jQuery ajax - failing cross-domain", function() {
var i = 2;
if ( jQuery.ajax({
jQuery.ajax({
url: 'http://somewebsitethatdoesnotexist-67864863574657654.com',
success: function(){ ok( false , "success" ); },
error: function(xhr,_,e){ ok( true , "file not found: " + xhr.status + " => " + e ); },
complete: function() { if ( ! --i ) start(); }
}) === false ) {
ok( true , "no transport" );
if ( ! --i ) start();
}
});
if ( jQuery.ajax({
jQuery.ajax({
url: 'http://www.google.com',
success: function(){ ok( false , "success" ); },
error: function(xhr,_,e){ ok( true , "access denied: " + xhr.status + " => " + e ); },
complete: function() { if ( ! --i ) start(); }
}) === false ) {
ok( true , "no transport" );
if ( ! --i ) start();
}
});
});
@ -1937,7 +1931,7 @@ test( "jQuery.ajax - statusCode" , function() {
404: function() {
ok( ! isSuccess , name );
}
}
};
}
jQuery.each( {