adds nil bodystream check

[akshaydeo]

Summary

Added error handling for empty response streams in the Gemini provider to prevent potential nil pointer dereferences.

Changes

• Added a check to verify if the response body stream is nil before attempting to scan it
• If the stream is nil, the code now creates a Bifrost operation error, sets the stream end indicator, and sends the error through the response channel
• This prevents the application from crashing when Gemini returns an empty response

Type of change

• Bug fix
• Feature
• Refactor
• Documentation
• Chore/CI

Affected areas

• Core (Go)
• Transports (HTTP)
• Providers/Integrations
• Plugins
• UI (Next.js)
• Docs

How to test

Test the Gemini provider with a scenario that would result in an empty response:

# Core/Transports
go version
go test ./core/providers/gemini/...

# Create a test that mocks an empty response from Gemini API

Breaking changes

• Yes
• No

Related issues

Fixes potential nil pointer dereference when Gemini returns empty responses

Security considerations

Prevents potential application crashes that could be triggered by empty responses from the Gemini API.

Checklist

• I read docs/contributing/README.md and followed the guidelines
• I added/updated tests where appropriate
• I updated documentation where needed
• I verified builds succeed (Go and UI)
• I verified the CI pipeline passes locally if applicable

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Enhanced error handling for empty streaming responses to ensure proper error reporting and prevent processing interruptions.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

Walkthrough

Added nil checks for empty streaming response bodies in Gemini's chat completion and response streaming handlers. When a streaming response body is empty, the handlers now create an operation error, mark stream completion in context, transmit the error through the post-hook channel, and return early.

Changes

Cohort / File(s)	Summary
Gemini Streaming Error Handling core/providers/gemini/gemini.go	Added guard clauses in HandleGeminiChatCompletionStream and HandleGeminiResponsesStream to detect empty streaming response bodies; on detection, creates a Bifrost operation error, sets stream end indicator in context, forwards error to post-hook channel, and returns early (+11 lines)

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

A stream runs dry, now caught in time,
The rabbit checks what's mine or thine—
If empty flows shall try to play,
We catch the error right away! 🐰✨

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch 01-12-adds_nil_bodystream_check

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📜 Recent review details

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 613dfe3 and c1e5ff7.

📒 Files selected for processing (1)

• core/providers/gemini/gemini.go

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[akshaydeo]

• adds nil bodystream check #1310 👈 (View in Graphite)
• v1.4.0

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