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gofiber / contrib

🧬 Repository for third party middlewares with dependencies
https://docs.gofiber.io/contrib/
MIT License
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Otel : Don't read response body size if the content-type is text/event-stream #1120

Closed Orygin closed 2 days ago

Orygin commented 1 month ago

The default behavior of the Otel middleware is to read the response size before proceeding with the request response. This breaks Server Sent Events using Fiber's SetBodyStreamWriter as the body is never properly flushed to the client.

This change is small and explicit for SSE, but there could be a more advanced mechanism to control this behavior per request.

Summary by CodeRabbit

coderabbitai[bot] commented 1 month ago

Walkthrough

The Middleware function in the fiber.go file has been updated to conditionally calculate the responseSize based on the response body length only when the response header's "Content-Type" is not "text/event-stream". This change ensures that the responseSize calculation is skipped for server-sent events, improving performance and accuracy.

Changes

File Path Change Summary
otelfiber/fiber.go Updated the Middleware function to conditionally calculate responseSize based on response body length, excluding "text/event-stream" content type. Added a declaration for responseSize as an int64 variable.

Poem

In Fiber's code, a change was made,
For streaming events, a rule was laid.
Response size now, it skips the stream,
Efficiency gained, like a coder's dream.
🎉📊✨

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