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express-fileupload

Simple express middleware for uploading files.

Version 1.1.1 Breaking Changes

Breaking change to md5 handling:

md5 value contains md5 hash instead of a function to compute it.
md5 now can be used with useTempFiles: true.

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, returns empty buffer in case useTempFiles option was set to true.
- req.files.foo.tempFilePath: A path to the temporary file in case useTempFiles option was set to true.
- req.files.foo.truncated: A boolean that represents if the file is over the size limit
- req.files.foo.size: Uploaded size in bytes
- req.files.foo.md5: MD5 checksum of the uploaded file
Examples
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 },
}));
```

Using useTempFile Options

Use temp files instead of memory for managing the upload process.

app.use(fileUpload({
    useTempFiles : true,
    tempFileDir : '/tmp/'
}));

Available Options

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

Help Wanted

Looking for additional maintainers. Please contact richardgirges [ at ] gmail.com if you're interested. Pull Requests are welcomed!

Thanks & Credit

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

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.
responseOnLimit	`'File size limit has been reached'` (default) `String`	Response which will be send to client if file size limit exceeded when abortOnLimit set to true.
limitHandler	`false` (default) `function(req, res, next)`	User defined limit handler which will be invoked if the file is bigger than configured limits.
useTempFiles	`false` (default) `true`	Will use temporary files at the specified tempDir for managing uploads rather than using buffers in memory. This avoids memory issues when uploading large files.
tempFileDir	`String` (path)	Used with the `useTempFiles` option. Path to the directory where temp files will be stored during the upload process. Feel free to add trailing slash, but it is not necessary.
parseNested	`false` (default) `true`	By default, req.body and req.files are flattened like this: `{'name': 'John', 'hobbies[0]': 'Cinema', 'hobbies[1]': 'Bike'}` When this option is enabled they are parsed in order to be nested like this: `{'name': 'John', 'hobbies': ['Cinema', 'Bike']}`

README.md