express-fileupload

express-fileupload

Simple express middleware for uploading files.

Version 1.0.0 Breaking Changes

Breaking change to md5 handling. Read about it here.

Install

# With NPM
npm install --save express-fileupload

# With Yarn
yarn add express-fileupload

Usage

When you upload a file, the file will be accessible from req.files.

Example:

• You're uploading a file called car.jpg
• Your input's name field is foo: <input name="foo" type="file" />
• In your express server request, you can access your uploaded file from req.files.foo:

app.post('/upload', function(req, res) {
  console.log(req.files.foo); // the uploaded file object
});

The req.files.foo object will contain the following:

• req.files.foo.name: "car.jpg"
• req.files.foo.mv: A function to move the file elsewhere on your server
• req.files.foo.mimetype: The mimetype of your file
• req.files.foo.data: A buffer representation of your file
• req.files.foo.truncated: A boolean that represents if the file is over the size limit
• req.files.foo.md5: A function that returns an MD5 checksum of the uploaded file

Examples

• Example Project
• Basic File Upload
• Multi-File Upload

Using Busboy Options

Pass in Busboy options directly to the express-fileupload middleware. Check out the Busboy documentation here.

app.use(fileUpload({
  limits: { fileSize: 50 * 1024 * 1024 },
}));

Available Options

Pass in non-Busboy options directly to the middleware. These are express-fileupload specific options.

Option	Acceptable Values	Details
createParentPath	false (default) true	Automatically creates the directory path specified in .mv(filePathName)
safeFileNames	false (default) true regex	Strips characters from the upload's filename. You can use custom regex to determine what to strip. If set to true, non-alphanumeric characters except dashes and underscores will be stripped. This option is off by default. Example #1 (strip slashes from file names): app.use(fileUpload({ safeFileNames: /\\/g })) Example #2: app.use(fileUpload({ safeFileNames: true }))
preserveExtension	false (default) true Number	Preserves filename extension when using safeFileNames option. If set to true, will default to an extension length of 3. If set to Number, this will be the max allowable extension length. If an extension is smaller than the extension length, it remains untouched. If the extension is longer, it is shifted. Example #1 (true): app.use(fileUpload({ safeFileNames: true, preserveExtension: true })); myFileName.ext --> myFileName.ext Example #2 (max extension length 2, extension shifted): app.use(fileUpload({ safeFileNames: true, preserveExtension: 2 })); myFileName.ext --> myFileNamee.xt
abortOnLimit	false (default) true	Returns a HTTP 413 when the file is bigger than the size limit if true. Otherwise, it will add a truncate = true to the resulting file structure.

Help Wanted

Pull Requests are welcomed!

Thanks & Credit

Brian White for his stellar work on the Busboy Package and the connect-busboy Package