uNetworking / uNetworking/uWebSockets

closeOnBackpressure should block all further sending

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bug WebSockets
Dominant language
C++
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Avg merge
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Merged PRs (30d)
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Description

When we reach maxBackpressure we start closing the connection (which doesn't even work on Windows!). But there is no guarantee that backpressure won't drain a bit and we then send another message still. This can cause a gap in the stream. This needs to be guaranteed that when we reach maxBackpressure and we are closing, never send anything more. To guarantee stream integrity.

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First steps

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the maxBackpressure handling and the connection send path. Confirm how backpressure can drain during connection closing, then verify that reaching maxBackpressure prevents every later send and preserves stream integrity, including on Windows.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
networking
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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