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# raw-body
[![NPM Version][npm-image]][npm-url]
[![NPM Downloads][downloads-image]][downloads-url]
[![Node.js Version][node-version-image]][node-version-url]
[![Build status][travis-image]][travis-url]
[![Test coverage][coveralls-image]][coveralls-url]
Gets the entire buffer of a stream either as a `Buffer` or a string.
Validates the stream's length against an expected length and maximum limit.
Ideal for parsing request bodies.
## API
```js
var getRawBody = require('raw-body')
```
### getRawBody(stream, [options], [callback])
**Returns a promise if no callback specified and global `Promise` exists.**
Options:
- `length` - The length of the stream.
If the contents of the stream do not add up to this length,
an `400` error code is returned.
- `limit` - The byte limit of the body.
If the body ends up being larger than this limit,
a `413` error code is returned.
- `encoding` - The requested encoding.
By default, a `Buffer` instance will be returned.
Most likely, you want `utf8`.
You can use any type of encoding supported by [iconv-lite](https://www.npmjs.org/package/iconv-lite#readme).
You can also pass a string in place of options to just specify the encoding.
`callback(err, res)`:
- `err` - the following attributes will be defined if applicable:
- `limit` - the limit in bytes
- `length` and `expected` - the expected length of the stream
- `received` - the received bytes
- `encoding` - the invalid encoding
- `status` and `statusCode` - the corresponding status code for the error
- `type` - either `entity.too.large`, `request.aborted`, `request.size.invalid`, `stream.encoding.set`, or `encoding.unsupported`
- `res` - the result, either as a `String` if an encoding was set or a `Buffer` otherwise.
If an error occurs, the stream will be paused, everything unpiped,
and you are responsible for correctly disposing the stream.
For HTTP requests, no handling is required if you send a response.
For streams that use file descriptors, you should `stream.destroy()` or `stream.close()` to prevent leaks.
## Examples
### Simple Express example
```js
var getRawBody = require('raw-body')
var typer = require('media-typer')
app.use(function (req, res, next) {
getRawBody(req, {
length: req.headers['content-length'],
limit: '1mb',
encoding: typer.parse(req.headers['content-type']).parameters.charset
}, function (err, string) {
if (err) return next(err)
req.text = string
next()
})
})
```
### Simple Koa example
```js
app.use(function* (next) {
var string = yield getRawBody(this.req, {
length: this.length,
limit: '1mb',
encoding: this.charset
})
})
```
### Using as a promise
To use this library as a promise, simply omit the `callback` and a promise is
returned, provided that a global `Promise` is defined.
```js
var getRawBody = require('raw-body')
var http = require('http')
var server = http.createServer(function (req, res) {
getRawBody(req)
.then(function (buf) {
res.statusCode = 200
res.end(buf.length + ' bytes submitted')
})
.catch(function (err) {
res.statusCode = 500
res.end(err.message)
})
})
server.listen(3000)
```
## License
[MIT](LICENSE)
[npm-image]: https://img.shields.io/npm/v/raw-body.svg
[npm-url]: https://npmjs.org/package/raw-body
[node-version-image]: https://img.shields.io/node/v/raw-body.svg
[node-version-url]: http://nodejs.org/download/
[travis-image]: https://img.shields.io/travis/stream-utils/raw-body/master.svg
[travis-url]: https://travis-ci.org/stream-utils/raw-body
[coveralls-image]: https://img.shields.io/coveralls/stream-utils/raw-body/master.svg
[coveralls-url]: https://coveralls.io/r/stream-utils/raw-body?branch=master
[downloads-image]: https://img.shields.io/npm/dm/raw-body.svg
[downloads-url]: https://npmjs.org/package/raw-body
|
