You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
224 lines
6.4 KiB
224 lines
6.4 KiB
3 years ago
|
# 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][github-actions-ci-image]][github-actions-ci-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.
|
||
|
|
||
|
## Install
|
||
|
|
||
|
This is a [Node.js](https://nodejs.org/en/) module available through the
|
||
|
[npm registry](https://www.npmjs.com/). Installation is done using the
|
||
|
[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
|
||
|
|
||
|
```sh
|
||
|
$ npm install raw-body
|
||
|
```
|
||
|
|
||
|
### TypeScript
|
||
|
|
||
|
This module includes a [TypeScript](https://www.typescriptlang.org/)
|
||
|
declaration file to enable auto complete in compatible editors and type
|
||
|
information for TypeScript projects. This module depends on the Node.js
|
||
|
types, so install `@types/node`:
|
||
|
|
||
|
```sh
|
||
|
$ npm install @types/node
|
||
|
```
|
||
|
|
||
|
## 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.
|
||
|
This is the number of bytes or any string format supported by
|
||
|
[bytes](https://www.npmjs.com/package/bytes),
|
||
|
for example `1000`, `'500kb'` or `'3mb'`.
|
||
|
If the body ends up being larger than this limit,
|
||
|
a `413` error code is returned.
|
||
|
- `encoding` - The encoding to use to decode the body into a string.
|
||
|
By default, a `Buffer` instance will be returned when no encoding is specified.
|
||
|
Most likely, you want `utf-8`, so setting `encoding` to `true` will decode as `utf-8`.
|
||
|
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.
|
||
|
|
||
|
If an error occurs, the stream will be paused, everything unpiped,
|
||
|
and you are responsible for correctly disposing the stream.
|
||
|
For HTTP requests, you may need to finish consuming the stream if
|
||
|
you want to keep the socket open for future requests. For streams
|
||
|
that use file descriptors, you should `stream.destroy()` or
|
||
|
`stream.close()` to prevent leaks.
|
||
|
|
||
|
## Errors
|
||
|
|
||
|
This module creates errors depending on the error condition during reading.
|
||
|
The error may be an error from the underlying Node.js implementation, but is
|
||
|
otherwise an error created by this module, which has the following attributes:
|
||
|
|
||
|
* `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` - the error type
|
||
|
|
||
|
### Types
|
||
|
|
||
|
The errors from this module have a `type` property which allows for the programmatic
|
||
|
determination of the type of error returned.
|
||
|
|
||
|
#### encoding.unsupported
|
||
|
|
||
|
This error will occur when the `encoding` option is specified, but the value does
|
||
|
not map to an encoding supported by the [iconv-lite](https://www.npmjs.org/package/iconv-lite#readme)
|
||
|
module.
|
||
|
|
||
|
#### entity.too.large
|
||
|
|
||
|
This error will occur when the `limit` option is specified, but the stream has
|
||
|
an entity that is larger.
|
||
|
|
||
|
#### request.aborted
|
||
|
|
||
|
This error will occur when the request stream is aborted by the client before
|
||
|
reading the body has finished.
|
||
|
|
||
|
#### request.size.invalid
|
||
|
|
||
|
This error will occur when the `length` option is specified, but the stream has
|
||
|
emitted more bytes.
|
||
|
|
||
|
#### stream.encoding.set
|
||
|
|
||
|
This error will occur when the given stream has an encoding set on it, making it
|
||
|
a decoded stream. The stream should not have an encoding set and is expected to
|
||
|
emit `Buffer` objects.
|
||
|
|
||
|
#### stream.not.readable
|
||
|
|
||
|
This error will occur when the given stream is not readable.
|
||
|
|
||
|
## Examples
|
||
|
|
||
|
### Simple Express example
|
||
|
|
||
|
```js
|
||
|
var contentType = require('content-type')
|
||
|
var express = require('express')
|
||
|
var getRawBody = require('raw-body')
|
||
|
|
||
|
var app = express()
|
||
|
|
||
|
app.use(function (req, res, next) {
|
||
|
getRawBody(req, {
|
||
|
length: req.headers['content-length'],
|
||
|
limit: '1mb',
|
||
|
encoding: contentType.parse(req).parameters.charset
|
||
|
}, function (err, string) {
|
||
|
if (err) return next(err)
|
||
|
req.text = string
|
||
|
next()
|
||
|
})
|
||
|
})
|
||
|
|
||
|
// now access req.text
|
||
|
```
|
||
|
|
||
|
### Simple Koa example
|
||
|
|
||
|
```js
|
||
|
var contentType = require('content-type')
|
||
|
var getRawBody = require('raw-body')
|
||
|
var koa = require('koa')
|
||
|
|
||
|
var app = koa()
|
||
|
|
||
|
app.use(function * (next) {
|
||
|
this.text = yield getRawBody(this.req, {
|
||
|
length: this.req.headers['content-length'],
|
||
|
limit: '1mb',
|
||
|
encoding: contentType.parse(this.req).parameters.charset
|
||
|
})
|
||
|
yield next
|
||
|
})
|
||
|
|
||
|
// now access this.text
|
||
|
```
|
||
|
|
||
|
### 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)
|
||
|
```
|
||
|
|
||
|
### Using with TypeScript
|
||
|
|
||
|
```ts
|
||
|
import * as getRawBody from 'raw-body';
|
||
|
import * as http from 'http';
|
||
|
|
||
|
const server = http.createServer((req, res) => {
|
||
|
getRawBody(req)
|
||
|
.then((buf) => {
|
||
|
res.statusCode = 200;
|
||
|
res.end(buf.length + ' bytes submitted');
|
||
|
})
|
||
|
.catch((err) => {
|
||
|
res.statusCode = err.statusCode;
|
||
|
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]: https://nodejs.org/en/download/
|
||
|
[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
|
||
|
[github-actions-ci-image]: https://img.shields.io/github/workflow/status/stream-utils/raw-body/ci/master?label=ci
|
||
|
[github-actions-ci-url]: https://github.com/jshttp/stream-utils/raw-body?query=workflow%3Aci
|