Contact emailsyhir...@chromium.org

Explainerhttps://bit.ly/2SVvKbR

Specificationhttps://fetch.spec.whatwg.org/#concept-body-stream

Design docs
http://bit.ly/3asqra2

Summary

Fetch upload streaming lets web developers make a fetch with a
ReadableStream body. Fetch provides a generic definition of Request and
Response objects (and other things involved with network requests).


Blink componentBlink>Network>FetchAPI
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ENetwork%3EFetchAPI>

TAG reviewhttps://github.com/w3ctag/design-reviews/issues/434

TAG review statusIssues open

Risks


Interoperability and Compatibility

TBD


*Gecko*: No signal (
https://github.com/mozilla/standards-positions/issues/207) No signals on
the standards-position ticket. Annevk has been active on the standards
discussions. Positive at TPAC 2019 [1].

*WebKit*: No signal (https://github.com/WebKit/standards-positions/issues/24)
No signals on the standards-position ticket. Positive at TPAC 2019 [1]. [1]
https://docs.google.com/document/d/1q090ovJ4gd8wSfVtvuoZLMZ51YkiFDsEZ0Jiqi41Iys/edit#heading=h.85gziabhajhg

*Web developers*: Positive
https://github.com/whatwg/fetch/issues/1438#issuecomment-1150755587
https://github.com/whatwg/fetch/issues/1438#issuecomment-1167984830

*Other signals*:

Security

- Only 'cors' and 'same-origin' requests allow streaming upload. You can't
use streaming upload with 'navigate' and 'no-cors' requests. - This feature
cannot be used with HTTP/1.x. If the server doesn't support HTTP/2 or
HTTP/3, the request fails. This is for some compatibility concerns. See
whatwg/fetch#966 for the past discussions.


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


Debuggability

Same as usual fetch()


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

Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?Yes

Flag name

Requires code in //chrome?False

Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=688906

Non-OSS dependencies

Does the feature depend on any code or APIs outside the Chromium open
source repository and its open-source dependencies to function?
No

Estimated milestones
OriginTrial desktop last 94
OriginTrial desktop first 85
OriginTrial Android last 94
OriginTrial Android first 85

Anticipated spec changes

Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github issues
in the project for the feature specification) whose resolution may
introduce web compat/interop risk (e.g., changing to naming or structure of
the API in a non-backward-compatible way).


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5274139738767360

Links to previous Intent discussionsIntent to Experiment:
https://groups.google.com/a/chromium.org/g/blink-dev/c/l7QI1bsq80Y/m/Z1TJ0nplAQAJ


This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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