Bugfix/path traversal check on chatId

[HenryHengZJ]

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[gemini-code-assist]

Summary of Changes

Hello @HenryHengZJ, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a crucial security fix by extending path traversal vulnerability checks to include the chatId parameter within the file attachment creation utility. This ensures that any attempts to manipulate file paths through the chatId are detected and blocked, thereby safeguarding the server from unauthorized file system access.

Highlights

• Security Enhancement: Implemented a path traversal check for the chatId parameter to prevent malicious directory access during file attachment creation.
• Code Refinement: Reordered the declaration of chatId to improve code readability and group related variable declarations.

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[gemini-code-assist]

Code Review

This pull request adds a path traversal check for chatId, which is a good security improvement. I've added one suggestion to make this check safer against cases where chatId might be missing, to prevent potential runtime errors.