Ajax: Drop the json to jsonp auto-promotion logic #4754
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Is this something the migrate plugin could feasilby detect, fix, and warn about without false positives? |
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@Krinkle I think it should be possible to detect and warn about this. |
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Previously, `jQuery.ajax` with `dataType: 'json'` with a provided callback was automatically converted to a jsonp request unless one also specified `jsonp: false`. Today the preferred way of interacting with a cross-domain backend is CORS which works in all browsers jQuery 4 will support. Auto-promoting JSON requests to JSONP ones introduces a security issue as the developer may be unaware they're not just downloading data but executing code from a remote domain. This commit disables the auto-promoting logic. BREAKING CHANGE: to trigger a JSONP request, it's now required to specify `dataType: "jsonp"`; previously some requests with `dataType: "json"` were auto-promoted to JSONP. Fixes jquerygh-1799 Fixes jquerygh-3376
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I added tests for issue #1799 since the logic will now be skipped for regular JSON requests. |
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I've also just submitted a Migrate PR: jquery/jquery-migrate#376. |
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This aligns the Node.js server with the previous PHP one in accepting `mock.php` as a callback which is triggered by a recently added test. This prevents the request crashing on that Node.js server and printing a JS error: ``` TypeError: Cannot read property '1' of null ``` Ref jquerygh-4754
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This aligns the Node.js server with the previous PHP one in accepting `mock.php` as a callback which is triggered by a recently added test. This prevents the request crashing on that Node.js server and printing a JS error: ``` TypeError: Cannot read property '1' of null ``` Ref jquerygh-4754
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This aligns the Node.js server with the previous PHP one in sending `mock.php` as a callback if there's no `callback` parameter in the query string which is triggered by a recently added test. This prevents the request crashing on that Node.js server and printing a JS error: ``` TypeError: Cannot read property '1' of null ``` Closes gh-4764 Ref gh-4754
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This aligns the Node.js server with the previous PHP one in sending `mock.php` as a callback if there's no `callback` parameter in the query string which is triggered by a recently added test. This prevents the request crashing on that Node.js server and printing a JS error: ``` TypeError: Cannot read property '1' of null ``` Closes jquerygh-4764 Ref jquerygh-4754 (cherry picked from commit df6858d)
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Summary
Previously,
jQuery.ajaxwithdataType: 'json'with a provided callback wasautomatically converted to a jsonp request unless one also specified
jsonp: false. Today the preferred way of interacting with a cross-domainbackend is CORS which works in all browsers jQuery 4 will support.
Auto-promoting JSON requests to JSONP ones introduces a security issue as the
developer may be unaware they're not just downloading data but executing code
from a remote domain.
This commit disables the auto-promoting logic.
BREAKING CHANGE: to trigger a JSONP request, it's now required to specify
dataType: "jsonp"; previously some requests withdataType: "json"wereauto-promoted to JSONP.
Fixes gh-1799
Fixes gh-3376
Checklist