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fix client send stream message without set text/event-stream.

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Fixes #<issue_number_goes_here> 🦕

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Summary of Changes

Hello @ChenKangQiang, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical bug in the client's Server-Sent Events (SSE) implementation. Previously, the client failed to include the necessary text/event-stream content type when sending stream messages, leading to improper SSE communication. The fix ensures that the correct content type is set, enabling reliable streaming functionality.

Highlights

  • Bug Fix: Corrected the getAsyncSSE method in JdkA2AHttpClient.java to properly set the text/event-stream content type. This was achieved by changing the argument passed to createRequestBuilder from false to true, ensuring correct Server-Sent Events (SSE) communication.
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Code Review

The pull request fixes an issue where the Accept: text/event-stream header was not being set for Server-Sent Events (SSE) GET requests. The review points out that the same issue exists for POST requests in postAsyncSSE and should also be fixed to ensure consistent behavior for all streaming requests.

Consumer<Throwable> errorConsumer,
Runnable completeRunnable) throws IOException, InterruptedException {
HttpRequest request = createRequestBuilder(false)
HttpRequest request = createRequestBuilder(true)
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high

The Accept header is correctly set for SSE GET requests. However, a similar issue exists for POST requests. The postAsyncSSE method calls createRequestBuilder(false), preventing the Accept: text/event-stream header from being set for streaming POST requests. To ensure consistency, apply a similar fix to postAsyncSSE.

Suggested change
HttpRequest request = createRequestBuilder(true)
HttpRequest request = createRequestBuilder(true)
.build();

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@ChenKangQiang Thanks for the PR! A similar change should also be made in the postAsyncSSE method as mentioned here.

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ok. now i have fix

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@sunyuhan1998 sunyuhan1998 left a comment

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LGTM!

@fjuma
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fjuma commented Jul 14, 2025

Thanks @ChenKangQiang!

@fjuma fjuma merged commit c3e7f9e into a2aproject:main Jul 14, 2025
3 checks passed
kabir pushed a commit to kabir/a2a-java that referenced this pull request Dec 23, 2025
fix client send stream message without set text/event-stream.

# Description

Thank you for opening a Pull Request!
Before submitting your PR, there are a few things you can do to make
sure it goes smoothly:

- [ ] Follow the [`CONTRIBUTING` Guide](../CONTRIBUTING.md).
- [ ] Make your Pull Request title in the
<https://www.conventionalcommits.org/> specification.
- Important Prefixes for
[release-please](https://github.com/googleapis/release-please):
- `fix:` which represents bug fixes, and correlates to a
[SemVer](https://semver.org/) patch.
- `feat:` represents a new feature, and correlates to a SemVer minor.
- `feat!:`, or `fix!:`, `refactor!:`, etc., which represent a breaking
change (indicated by the `!`) and will result in a SemVer major.
- [ ] Ensure the tests pass
- [ ] Appropriate READMEs were updated (if necessary)

Fixes #<issue_number_goes_here> 🦕

---------

Co-authored-by: chenkangqiang <[email protected]>
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3 participants