getsentry / getsentry/sentry

[Replay] SSE (text/event-stream) response body not captured - 0B recorded despite successful stream

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Feature Improvement Product Area: Replays Replays
Dominant language
Python
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Description

Environment

SaaS (https://sentry.io/)

Steps to Reproduce

Replay correctly records SSE requests in the network tab (status, duration, headers), but captures 0B of response body. Individual events pushed over the stream, connection duration, event count, and close reason are all invisible.

Expected Result

Event count, connection duration, and close reason captured.
Ideally: individual SSE event payloads visible in the Replay timeline.

Actual Result

SSE request appears in the Replay network tab with status 200, but response Body Size is 0B. No stream content, individual events, event count, or close reason is recorded.

Product Area

Replays

Link

No response

DSN

No response

Version

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  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 reproducing the issue with an SSE (text/event-stream) response in Replay and trace the existing network capture path. Done means the Replay network entry records the stream's event count, connection duration, close reason, and response body size; individual event payload visibility is the stated ideal.

Written by the indexing model from the issue text.

Assessment

Domain
observability-sre
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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