fetch implementation does not support streams from the spec - needs implementation in React Native core
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Description
React Native has not implemented fetch on top of native APIs, and the fetch polyfill built on top of XHR does not support streams where response.body is a getter for a ReadableStream.
React Native version:
0.61.4
Steps To Reproduce
Use fetch and see that response.body is undefined rather than a getter for a ReadableStream according the the fetch spec.
Describe what you expected to happen:
I expected for response.body to be defined.
Related issues
https://github.com/facebook/react-native/issues/9629
https://github.com/facebook/react-native/issues/12912
https://github.com/github/fetch/issues/746#issuecomment-573251497 (cc @MattiasBuelens)
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the fetch polyfill and its XHR-based response handling, then compare response.body with the Fetch specification and related issues #9629 and #12912. Done means fetch responses expose response.body as a ReadableStream, with coverage for the reported behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- react-native
- Domain
- mobile
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100