fix: check nil case for the bytes cast

[rustatian]

Reason for This PR

closes: roadrunner-server/roadrunner#1903

Description of Changes

• Additionally, check for the nil bytes.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

Summary by CodeRabbit

• Bug Fixes
  • Improved handling of cases where request bodies are empty to prevent errors and enhance application stability.

[coderabbitai]

Walkthrough

The recent modification in the code introduces a safeguard to handle scenarios where the input body (r.body) is null. This adjustment ensures that the function gracefully handles null values, avoiding potential errors in the switch statement and enhancing the overall stability of the application.

Changes

File	Change Summary
.../request.go	Added a check to return nil if r.body is nil, improving robustness.

Poem

🐇💻
In the land of code, where the rabbits hop,
A tiny change was made, not a lot.
But oh, how it smooths the flow,
Where nulls once troubled, now they go.
Cheers to safe checks, hip hip hooray!
Onward we code, with less dismay. 🌟

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Recent Review Details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between dc955e5 and 1563bcf.

Files selected for processing (1)

• handler/request.go (1 hunks)

Additional comments not posted (1)

handler/request.go (1)

189-191: Add a nil check for r.body to prevent processing when it's nil.

This change enhances the robustness of the code by ensuring that the method returns early if r.body is nil, preventing any further processing which could lead to errors.

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