145 lines
7.4 KiB
Markdown
145 lines
7.4 KiB
Markdown
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# body-parser
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[](https://badge.fury.io/js/body-parser)
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[](https://travis-ci.org/expressjs/body-parser)
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[](https://coveralls.io/r/expressjs/body-parser)
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Node.js body parsing middleware.
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This does not handle multipart bodies, due to their complex and typically large nature. For multipart bodies, you may be interested in the following modules:
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- [busboy](https://www.npmjs.org/package/busboy#readme) and [connect-busboy](https://www.npmjs.org/package/connect-busboy#readme)
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- [multiparty](https://www.npmjs.org/package/multiparty#readme) and [connect-multiparty](https://www.npmjs.org/package/connect-multiparty#readme)
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- [formidable](https://www.npmjs.org/package/formidable#readme)
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- [multer](https://www.npmjs.org/package/multer#readme)
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Other body parsers you might be interested in:
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- [body](https://www.npmjs.org/package/body#readme)
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- [co-body](https://www.npmjs.org/package/co-body#readme)
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## Installation
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```sh
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$ npm install body-parser
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```
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## API
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```js
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var express = require('express')
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var bodyParser = require('body-parser')
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var app = express()
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// parse application/x-www-form-urlencoded
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app.use(bodyParser.urlencoded())
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// parse application/json
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app.use(bodyParser.json())
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// parse application/vnd.api+json as json
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app.use(bodyParser.json({ type: 'application/vnd.api+json' }))
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app.use(function (req, res, next) {
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console.log(req.body) // populated!
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next()
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})
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```
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### bodyParser.json(options)
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Returns middleware that only parses `json`. This parser accepts any Unicode encoding of the body and supports automatic inflation of `gzip` and `deflate` encodings.
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The options are:
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- `strict` - only parse objects and arrays. (default: `true`)
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- `inflate` - if deflated bodies will be inflated. (default: `true`)
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- `limit` - maximum request body size. (default: `<100kb>`)
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- `reviver` - passed to `JSON.parse()`
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- `type` - request content-type to parse (default: `json`)
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- `verify` - function to verify body content
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The `type` argument is passed directly to the [type-is](https://www.npmjs.org/package/type-is#readme) library. This can be an extension name (like `json`), a mime type (like `application/json`), or a mime time with a wildcard (like `*/json`).
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The `verify` argument, if supplied, is called as `verify(req, res, buf, encoding)`, where `buf` is a `Buffer` of the raw request body and `encoding` is the encoding of the request. The parsing can be aborted by throwing an error.
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The `reviver` argument is passed directly to `JSON.parse` as the second argument. You can find more information on this argument [in the MDN documentation about JSON.parse](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#Example.3A_Using_the_reviver_parameter).
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### bodyParser.raw(options)
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Returns middleware that parses all bodies as a `Buffer`. This parser supports automatic inflation of `gzip` and `deflate` encodings.
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The options are:
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- `inflate` - if deflated bodies will be inflated. (default: `true`)
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- `limit` - maximum request body size. (default: `<100kb>`)
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- `type` - request content-type to parse (default: `application/octet-stream`)
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- `verify` - function to verify body content
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The `type` argument is passed directly to the [type-is](https://www.npmjs.org/package/type-is#readme) library. This can be an extension name (like `bin`), a mime type (like `application/octet-stream`), or a mime time with a wildcard (like `application/*`).
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The `verify` argument, if supplied, is called as `verify(req, res, buf, encoding)`, where `buf` is a `Buffer` of the raw request body and `encoding` is the encoding of the request. The parsing can be aborted by throwing an error.
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### bodyParser.text(options)
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Returns middleware that parses all bodies as a string. This parser supports automatic inflation of `gzip` and `deflate` encodings.
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The options are:
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- `defaultCharset` - the default charset to parse as, if not specified in content-type. (default: `utf-8`)
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- `inflate` - if deflated bodies will be inflated. (default: `true`)
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- `limit` - maximum request body size. (default: `<100kb>`)
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- `type` - request content-type to parse (default: `text/plain`)
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- `verify` - function to verify body content
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The `type` argument is passed directly to the [type-is](https://www.npmjs.org/package/type-is#readme) library. This can be an extension name (like `txt`), a mime type (like `text/plain`), or a mime time with a wildcard (like `text/*`).
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The `verify` argument, if supplied, is called as `verify(req, res, buf, encoding)`, where `buf` is a `Buffer` of the raw request body and `encoding` is the encoding of the request. The parsing can be aborted by throwing an error.
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### bodyParser.urlencoded(options)
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Returns middleware that only parses `urlencoded` bodies. This parser accepts only UTF-8 encoding of the body and supports automatic inflation of `gzip` and `deflate` encodings.
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The options are:
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- `extended` - parse extended syntax with the [qs](https://www.npmjs.org/package/qs#readme) module. (default: `true`)
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- `inflate` - if deflated bodies will be inflated. (default: `true`)
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- `limit` - maximum request body size. (default: `<100kb>`)
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- `type` - request content-type to parse (default: `urlencoded`)
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- `verify` - function to verify body content
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The `extended` argument allows to choose between parsing the urlencoded data with the `querystring` library (when `false`) or the `qs` library (when `true`). The "extended" syntax allows for rich objects and arrays to be encoded into the urlencoded format, allowing for a JSON-like exterience with urlencoded. For more information, please [see the qs library](https://www.npmjs.org/package/qs#readme).
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The `type` argument is passed directly to the [type-is](https://www.npmjs.org/package/type-is#readme) library. This can be an extension name (like `urlencoded`), a mime type (like `application/x-www-form-urlencoded`), or a mime time with a wildcard (like `*/x-www-form-urlencoded`).
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The `verify` argument, if supplied, is called as `verify(req, res, buf, encoding)`, where `buf` is a `Buffer` of the raw request body and `encoding` is the encoding of the request. The parsing can be aborted by throwing an error.
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### req.body
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A new `body` object containing the parsed data is populated on the `request` object after the middleware.
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## License
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The MIT License (MIT)
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Copyright (c) 2014 Jonathan Ong me@jongleberry.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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