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expressjs multer file upload
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<form action="/photos/upload" enctype="multipart/form-data" method="post"> | |
<input type="file" name="photos" multiple> | |
<input type="text" name="desc"> | |
<input type="submit" value="Submit"> | |
</form> |
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const path = require("path"); | |
const express = require("express"); | |
const multer = require("multer"); | |
const upload = multer({ | |
// file size limitation in bytes | |
limits: { | |
fileSize: 1 * 1024 * 1024, | |
}, | |
// file validation | |
fileFilter: (req, file, cb) => { | |
const ext = path.extname(file.originalname); | |
if (ext !== ".jpg") { | |
cb(new Error("image must be jpg")); | |
} | |
cb(null, true); | |
}, | |
// file storage configuration | |
storage: multer.diskStorage({ | |
destination: (req, file, cb) => { | |
cb(null, path.join(__dirname, "/uploads")); | |
}, | |
filename: (req, file, cb) => { | |
let filename = | |
file.fieldname + "-" + Date.now() + path.extname(file.originalname); | |
cb(null, filename); | |
}, | |
}), | |
}); | |
const uploadTwo = upload.array("photos", 2); | |
const app = express(); | |
app.post("/photos/upload", function (req, res, next) { | |
uploadTwo(req, res, (err) => { | |
// file size multer error | |
if (err instanceof multer.MulterError) { | |
return res.end("multer: " + err); | |
} | |
// custom error from fileFilter | |
else if (err) { | |
return res.end("err: " + err); | |
} | |
// upload.single | |
// console.log(req.file); | |
// upload.fields | |
// console.log(req.files['first'][0]) | |
// upload.files | |
console.log(req.files); | |
// other form data | |
console.log(req.body); | |
return res.end("ok"); | |
}); | |
}); | |
app.get("/", function (req, res) { | |
res.sendFile(path.join(__dirname, "/index.html")); | |
}); | |
app.listen(8000); |
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