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Core
DOM
P5
normal
RESOLVED DUPLICATE of bug 1128959
4 years ago
a year ago

People

(Reporter: tOkeshu, Unassigned)

Tracking

(Blocks: 2 bugs)

Trunk
Points:
---
Dependency tree / graph

Firefox Tracking Flags

(Not tracked)

Details

(Reporter)

Description

4 years ago
The W3C has a Working Draft for the Streams API.

http://www.w3.org/TR/streams-api/

It would be really useful to see that implemented in Firefox for applications that require the processing of large files with JavaScript.

Example use cases:

- End-to-end client side encryption
- Large file processing
- Piping files download/upload between 2 different sources
- Large file sharing in the context of WebRTC

My main use case is the last one. For now, to download a file sent via WebRTC DataChannels we have to load the whole file in memory to create a blob url. This reduce our ability to share large files (see https://github.com/Peer5/ShareFest/issues/21 for this kind of issue).

The Streams API should solve this problem via it's URL extensions.

Here is a few applications that could take advantage of these API:

https://github.com/mozilla/talkilla
https://github.com/Peer5/ShareFest
https://github.com/ShareIt-project/ShareIt
Stream API as such isn't quite what we want. See the discussion on the webapps wg mailing list.

Gecko-only XHR responseTypes moz-chunked-text and moz-chunked-arraybuffer are closer to what is needed.
Flags: needinfo?(annevk)

Comment 2

4 years ago
Yes, Streams API is going to change. We should not implement that draft.
Flags: needinfo?(annevk)
I think we could do a prototype implementation of the API drafted here though:

http://lists.w3.org/Archives/Public/public-webapps/2013AprJun/0727.html

This also has support for the "chunked" mode.

I believe google is working on a spec draft based off of that. IIRC that draft has some small changes compared to the email above, but they are largely the same.

Anne, do you have a link to that draft?

Comment 4

4 years ago
http://htmlpreview.github.io/?https://github.com/tyoshino/stream/blob/master/streams.html
Blocks: 907468
Keywords: dev-doc-needed

Comment 5

3 years ago
Marcos asked me to give an update on the streams spec's progress. For those not aware, we have moved development to https://github.com/whatwg/streams. See also https://whatwg.github.io/streams/ (temporary URL) which contains more of the explanatory text and examples, and will eventually contain the algorithms currently prototyped at the former URL.

Since this now part of my full-time job, we have made great progress on nailing down the spec and the accompanying polyfill and test suite. The remaining outstanding pieces are:

- Finishing the work on transform streams. This is being prototyped in a branch at [1], see e.g. [2] and [3].
- Building a quick-and-dirty performance-testing suite, and using the gathered data to decide if we can simplify some APIs which are currently potentially-overengineered in the name of performance. This is being done in a branch at [4].

The second point is the most interesting, as it could change the API surface in various ways: some subtle, some more complicated. That is why I am rushing to get it done as soon as possible---probably within the next week or two. The first is close to done; I started it to see how hard it would be, and have found that it's not very hard, so I am putting it on the backburner while I finish the perf test and related potential simplifications.

I know that tentative steps have started toward an implementation in Chrome, see [5] and especially the recently-filed [6], plus related discussions at [7].

In terms of spec-readiness timeline, my goal is for it to be completely finished, including a prototype and test suite, by end of Q3. If there are things that you guys would like sooner let me know and I can do my best to accommodate.

[1]: https://github.com/whatwg/streams/tree/transform
[2]: https://github.com/whatwg/streams/blob/394bb5e7e19c3455ce0803e227d2ee05e2f5831f/reference-implementation/lib/transform-stream.js
[3]: https://github.com/whatwg/streams/blob/394bb5e7e19c3455ce0803e227d2ee05e2f5831f/reference-implementation/test/transform-stream.js
[4]: https://github.com/whatwg/streams/tree/perf-test-suite/reference-implementation
[5]: https://code.google.com/p/chromium/issues/detail?id=240603
[6]: https://code.google.com/p/chromium/issues/detail?id=393911
[7]: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/GoFbe0yLO50
Blocks: 1056444
Priority: -- → P5
Superseded by bug 1128959 and the WHATWG Streams spec.
Status: NEW → RESOLVED
Last Resolved: a year ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1128959
Keywords: dev-doc-needed

Updated

a year ago
Blocks: 1247634

Updated

a year ago
No longer blocks: 1247634
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