Function validate_file_path 

pub fn validate_file_path(path: &str) -> Result<PathBuf>

Validates a file path to prevent directory traversal attacks

Security Checks

• Rejects absolute paths
• Rejects paths with .. components
• Ensures path stays within current working directory
• Normalizes and canonicalizes the path

Arguments

• path - User-provided file path

Returns

• Ok(PathBuf) if path is valid and safe
• Err(io::Error) if path violates security constraints