/raw-body

Get and validate the raw body of a readable stream

Primary LanguageJavaScript

Raw Body Build Status

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

var getRawBody = require('raw-body')

app.use(function (req, res, next) {
  getRawBody(req, {
    length: req.headers['content-length'],
    limit: '1mb',
    encoding: 'utf8'
  }, function (err, string) {
    if (err)
      return next(err)

    req.text = string
    next()
  })
})

or in a Koa generator:

app.use(function* (next) {
  var string = yield getRawBody(this.req, {
    length: this.length,
    limit: '1mb',
    encoding: 'utf8'
  })
})

getRawBody(stream, [options], [callback])

Returns a thunk for yielding with generators.

Options:

  • length - The length 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 StringDecoder. You can also pass true which sets it to the default utf8

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
    • status and statusCode - the corresponding status code for the error
    • type - either entity.too.large, request.size.invalid, or stream.encoding.set

  • 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, 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.

License

The MIT License (MIT)

Copyright (c) 2013 Jonathan Ong me@jongleberry.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.