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Viewing file:     fileValidate.js (2.13 KB)      -rw-r--r--

import fs from "fs";
// Allowed file type (WebP) magic bytes
const WEBP_MAGIC_BYTES = Buffer.from([0x52, 0x49, 0x46, 0x46]); // "RIFF"
const validateFiles = (req, res, next) => {
    // const files = req.files;
    const files = req.files || (req.file ? [req.file] : []); // Handle single & multiple files
    // console.log(files);

    if (!files || files.length === 0) {
        res.locals.data={"error" : "true","message":"No file is found"};
        return res.status(400).json({ error : "true",message: "Invalid Request" });
    }

    if (files.length > 5) {
        res.locals.data={ "error" : "true","message":`Maximum 5 files allowed. ${files.length} send` };
        return res.status(400).json({ error : "true",message: "Invalid Request" });

    }

    let totalSize = 0;

    for (const file of files) {
        const { size, mimetype, path, originalname } = file;
        console.log(size);
        
        // Accumulate total size
        totalSize += size;

        // // Validate MIME type (only allow WebP)
        // if (mimetype !== "image/webp") {
        //     res.locals.data={ error : "true", message: `Invalid file type: ${originalname} is not a WebP file.` };
        //     return res.status(400).json({ error : "true",message: "Invalid Request" });

        // }

        // // Validate magic bytes
        // const fileBuffer = fs.readFileSync(path);
        // if (!fileBuffer.slice(0, 4).equals(WEBP_MAGIC_BYTES)) {
        //     res.locals.data={ error : "true", message: `File ${originalname} is not a valid WebP file (invalid magic bytes).` };
        //     return res.status(400).json({ error : "true",message: "Invalid Request" });

        // }
    }

    // Check total size (max 10MB)
    if (totalSize > 15 * 1024 * 1024) {
        // return res.status(400).json({ error: "Total file size exceeds 10MB limit." });
        res.locals.data={ error : "true", message: `Total file size exceeds 10MB limit. Uploaded file size is ${totalSize/1024/1024}MB` };
        return res.status(400).json({ error : "true",message: "Invalid Request" });
    }
    next();
};

export {validateFiles} ;