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[Palchhi8]

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[Palchhi8]

@CodiumAI-Agent /review

[CodiumAI-Agent]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 4 🔵🔵🔵🔵⚪

🧪 No relevant tests

🔒 Security concerns File upload vulnerabilities: The upload flow trusts client-provided MIME types and manual content-length checks, both of which can be spoofed. Additionally, serving the entire uploads directory statically may expose unintended files. Ensure file signature validation, enforce strict size limits via multer, and restrict served file paths.

⚡ Recommended focus areas for review Redundant File Size Check The manual content-length header check in the fileFilter is unreliable and redundant since multer enforces file size limits. Removing it can simplify the logic and avoid mismatches. const maxSize = MAX_FILE_SIZES[fileType as keyof typeof MAX_FILE_SIZES]; if (req.headers['content-length'] && parseInt(req.headers['content-length']) > maxSize) { return cb(new ApiError(400, `File too large. Maximum size for ${fileType} is ${maxSize / (1024 * 1024)}MB`)); } Trusting MIME Types Validation relies solely on the client-provided MIME type, which can be spoofed. Consider verifying file signatures or using additional validation to ensure file integrity. const getFileType = (mimetype: string): string | null => { for (const [type, mimeTypes] of Object.entries(ALLOWED_FILE_TYPES)) { if (mimeTypes.includes(mimetype)) { return type; } } return null; }; Fragile URL Generation Splitting filePath on "uploads" to derive the URL is brittle and may break if the path contains additional "uploads" segments. Use path.relative or a more robust URL builder. export const getFileUrl = (req: Request, filePath: string): string => { const baseUrl = `${req.protocol}://${req.get('host')}`; const relativePath = filePath.split('uploads')[1].replace(/\\/g, '/'); return `${baseUrl}/uploads${relativePath}`; };