Contact emails
[email protected]

Specification
https://fetch.spec.whatwg.org


Summary
An AbortController can be passed into fetch to allow a request to be aborted; 
this is already supported see https://chromestatus.com/feature/5631483679080448 
When calling abort, you can optionally pass in an "abort reason", and the 
original fetch promise if it hasn't resolved should be rejected with that 
reason. This is already working as intended. *However*, if the fetch promise 
*has* resolved (after reading the header), but the body has not yet been fully 
read, this is also intended to propagate the abort reason to the Response 
methods such as Response.blob(), as well as the ReadableStream Response.body. 
This part is not currently working; the relevant Promises instead are rejected 
with generic AbortErrors. Firefox at least is compliant here but 
chromium/Edge/Safari are not.


Blink component
Blink>Network>FetchAPI


Web Feature ID
abortable-fetch


Motivation
No information provided


Initial public proposal
No information provided


TAG review
No information provided


TAG review status
Not applicable


Goals for experimentation
None


Risks




Interoperability and Compatibility
No information provided

Gecko: Shipped/Shipping

WebKit: No signal

Web developers: No signals

Other signals:


WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it 
has potentially high risk for Android WebView-based applications?
No information provided



Debuggability
No information provided


Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, 
ChromeOS, Android, and Android WebView)?
Yes


Is this feature fully tested by web-platform-tests?
Yes
https://wpt.fyi/results/fetch/api/abort/general.any.html Specifically the 
tests: * response.arrayBuffer() rejects with abort reason if already aborted 
(and other response methods such as body()) * Stream errors once aborted with 
abort reason. Underlying connection closed.


Flag name on about://flags
No information provided


Finch feature name
ForwardReasonToFetchBodyAbort


Rollout plan
(RARE) Experiment users ramp up over time


Requires code in //chrome?
False


Tracking bug
https://issues.chromium.org/issues/502133195


Estimated milestones


Shipping on desktop 153

Shipping on Android 153

Shipping on WebView 153

Shipping on iOS 153




Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop 
issues. Please list open issues (eg links to known github issues in the project 
for the feature specification) whose resolution may introduce web 
compat/interop risk (eg, changing to naming or structure of the API in a 
non-backward-compatible way).
No information provided


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5158507786665984?gate=6176253840326656


This intent message was generated by Chrome Platform Status.

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