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Ajax: Execute JSONP error script responses

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Issue gh-4379 was meant to be a bug fix but the JSONP case is a bit special:
under the hood it's a script but it simulates JSON responses in an environment
without a CORS setup and sending JSON payloads on error responses is quite
typical there.

This commit makes JSONP error responses still execute the payload. The regular
script error responses continue to be skipped.

Fixes gh-4771
Closes gh-4773

(cherry picked from commit a1e619b03a)
This commit is contained in:
Dallas Fraser 2020-08-25 15:41:06 -04:00 committed by Michał Gołębiowski-Owczarek
parent beea433d33
commit 3bae54aa50
2 changed files with 17 additions and 2 deletions
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6
src/ajax.js
View File

@ -745,8 +745,10 @@ jQuery.extend( {
response = ajaxHandleResponses( s, jqXHR, responses );
}
// Use a noop converter for missing script
if ( !isSuccess && jQuery.inArray( "script", s.dataTypes ) > -1 ) {
// Use a noop converter for missing script but not if jsonp
if ( !isSuccess &&
jQuery.inArray( "script", s.dataTypes ) > -1 &&
jQuery.inArray( "json", s.dataTypes ) < 0 ) {
s.converters[ "text script" ] = function() {};
}

13
test/unit/ajax.js
View File

@ -837,6 +837,19 @@ QUnit.module( "ajax", {
};
} );
ajaxTest( "jQuery.ajax() - do execute scripts if JSONP from unsuccessful responses", 1, function( assert ) {
var testMsg = "Unsuccessful JSONP requests should have a JSON body";
return {
dataType: "jsonp",
url: url( "mock.php?action=errorWithScript" ),
// error is the significant assertion
error: function( xhr ) {
var expected = { "status": 404, "msg": "Not Found" };
assert.deepEqual( xhr.responseJSON, expected, testMsg );
}
};
} );
ajaxTest( "jQuery.ajax() - do not execute scripts from unsuccessful responses (gh-4250)", 11, function( assert ) {
var globalEval = jQuery.globalEval;