Node.js Express Service Adds Early Image Size Limits to Block Oversized Uploads

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A technical guide recommends implementing early size checks for image uploads in Node.js Express applications. The method involves reading image metadata before full processing to compare dimensions against set limits. This prevents expensive decoding of oversized files, such as identity documents in fintech services. The approach uses two separate limits: one for file size during transfer and another for pixel dimensions during processing. Early rejection reduces server load and provides clear feedback when uploads exceed configured thresholds.

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