**PROTIP** Be sure to read [Migrating from 3.x to 4.x](https://github.com/visionmedia/express/wiki/Migrating-from-3.x-to-4.x) as well as [New features in 4.x](https://github.com/visionmedia/express/wiki/New-features-in-4.x).
**PROTIP** Be sure to read [Migrating from 3.x to 4.x](https://github.com/visionmedia/express/wiki/Migrating-from-3.x-to-4.x) as well as [New features in 4.x](https://github.com/visionmedia/express/wiki/New-features-in-4.x).
## Installation
### Installation
$ npm install express
```bash
$ npm install express
```
## Quick Start
The quickest way to get started with express is to utilize the executable [`express(1)`](http://github.com/expressjs/generator) to generate an application as shown below:
Install the executable. The executable's major version will match Express's:
$ npm install -g express-generator@3
The quickest way to get started with express is to utilize the executable [`express(1)`](https://github.com/expressjs/generator) to generate an application as shown below:
Install the executable. The executable's major version will match Express's:
Create the app:
```bash
$ npm install-g express-generator@4
```
$ express /tmp/foo && cd /tmp/foo
Create the app:
```bash
$ express /tmp/foo &&cd /tmp/foo
```
Install dependencies:
Install dependencies:
$ npm install
```bash
$ npm install
```
Start the server:
Start the server:
$ npm start
```bash
$ npm start
```
## Features
...
...
@@ -61,53 +71,57 @@ app.listen(3000);
HTTP APIs.
Express does not force you to use any specific ORM or template engine. With support for over
14 template engines via [Consolidate.js](http://github.com/visionmedia/consolidate.js),
14 template engines via [Consolidate.js](https://github.com/visionmedia/consolidate.js),
you can quickly craft your perfect framework.
## More Information
*[Website and Documentation](http://expressjs.com/)stored at [visionmedia/expressjs.com](https://github.com/visionmedia/expressjs.com)
*Join #express on freenode
*[Google Group](http://groups.google.com/group/express-js) for discussion
*Follow [tjholowaychuk](http://twitter.com/tjholowaychuk) and [defunctzombie](https://twitter.com/defunctzombie) on twitter for updates
*Visit the [Wiki](http://github.com/visionmedia/express/wiki)
*[Website and Documentation](http://expressjs.com/)- [[website repo](https://github.com/visionmedia/expressjs.com)]
*[Github Organization](https://github.com/expressjs) for Official Middleware & Modules
*[#express](https://webchat.freenode.net/?channels=express) on freenode IRC
*Visit the [Wiki](https://github.com/visionmedia/express/wiki)
*[Google Group](https://groups.google.com/group/express-js) for discussion
"readme":"# finalhandler\n\n[](https://badge.fury.io/js/finalhandler)\n[](https://travis-ci.org/expressjs/finalhandler)\n[](https://coveralls.io/r/expressjs/finalhandler)\n\nNode.js function to invoke as the final step to respond to HTTP request.\n\n## Installation\n\n```sh\n$ npm install finalhandler\n```\n\n## API\n\n```js\nvar finalhandler = require('finalhandler')\n```\n\n### finalhandler(req, res, [options])\n\nReturns function to be invoked as the final step for the given `req` and `res`.\nThis function is to be invoked as `fn(err)`. If `err` is falsy, the handler will\nwrite out a 404 response to the `res`. If it is truthy, an error response will\nbe written out to the `res`, and `res.statusCode` is set from `err.status`.\n\n#### options.env\n\nBy default, the environment is determined by `NODE_ENV` variable, but it can be\noverridden by this option.\n\n#### options.onerror\n\nProvide a function to be called with the `err` when it exists. Can be used for\nwriting errors to a central location without excessive function generation. Called\nas `onerror(err, req, res)`.\n\n## Examples\n\n### always 404\n\n```js\nvar finalhandler = require('finalhandler')\nvar http = require('http')\n\nvar server = http.createServer(function (req, res) {\n var done = finalhandler(req, res)\n done()\n})\n\nserver.listen(3000)\n```\n\n### perform simple action\n\n```js\nvar finalhandler = require('finalhandler')\nvar fs = require('fs')\nvar http = require('http')\n\nvar server = http.createServer(function (req, res) {\n var done = finalhandler(req, res)\n\n fs.readFile('index.html', function (err, buf) {\n if (err) return done(err)\n res.setHeader('Content-Type', 'text/html')\n res.end(buf)\n })\n})\n\nserver.listen(3000)\n```\n\n### use with middleware-style functions\n\n```js\nvar finalhandler = require('finalhandler')\nvar http = require('http')\nvar serveStatic = require('serve-static')\n\nvar serve = serveStatic('public')\n\nvar server = http.createServer(function (req, res) {\n var done = finalhandler(req, res)\n serve(req, res, done)\n})\n\nserver.listen(3000)\n```\n\n### keep log of all errors\n\n```js\nvar finalhandler = require('finalhandler')\nvar fs = require('fs')\nvar http = require('http')\n\nvar server = http.createServer(function (req, res) {\n var done = finalhandler(req, res, {onerror: logerror})\n\n fs.readFile('index.html', function (err, buf) {\n if (err) return done(err)\n res.setHeader('Content-Type', 'text/html')\n res.end(buf)\n })\n})\n\nserver.listen(3000)\n\nfunction logerror(err) {\n console.error(err.stack || err.toString())\n}\n```\n\n## License\n\nThe MIT License (MIT)\n\nCopyright (c) 2014 Douglas Christopher Wilson\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in\nall copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\nTHE SOFTWARE.\n",
"readme":"# media-typer\n\n[](https://badge.fury.io/js/media-typer)\n[](https://travis-ci.org/expressjs/media-typer)\n[](https://coveralls.io/r/expressjs/media-typer)\n\nSimple RFC 6838 media type parser\n\n## Installation\n\n```sh\n$ npm install media-typer\n```\n\n## API\n\n```js\nvar typer = require('media-typer')\n```\n\n### typer.parse(string)\n\n```js\nvar obj = typer.parse('image/svg+xml; charset=utf-8')\n```\n\nParse a media type string. This will return an object with the following\nproperties (examples are shown for the string `'image/svg+xml; charset=utf-8'`):\n\n - `type`: The type of the media type (always lower case). Example: `'image'`\n\n - `subtype`: The subtype of the media type (always lower case). Example: `'svg'`\n\n - `suffix`: The suffix of the media type (always lower case). Example: `'xml'`\n\n - `parameters`: An object of the parameters in the media type (name of parameter always lower case). Example: `{charset: 'utf-8'}`\n\n### typer.parse(req)\n\n```js\nvar obj = typer.parse(req)\n```\n\nParse the `content-type` header from the given `req`. Short-cut for\n`typer.parse(req.headers['content-type'])`.\n\n### typer.parse(res)\n\n```js\nvar obj = typer.parse(req)\n```\n\nParse the `content-type` header set on the given `res`. Short-cut for\n`typer.parse(res.getHeader('content-type'))`.\n\n### typer.format(obj)\n\n```js\nvar obj = typer.format({type: 'image', subtype: 'svg', suffix: 'xml'})\n```\n\nFormat an object into a media type string. This will return a string of the\nmime type for the given object. For the properties of the object, see the\ndocumentation for `typer.parse(string)`.\n\n## License\n\nThe MIT License (MIT)\n\nCopyright (c) 2014 Douglas Christopher Wilson\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in\nall copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\nTHE SOFTWARE.\n",
"readme":"# parseurl\n\nParse a URL with memoization.\n\n## API\n\n### var pathname = parseurl(req)\n\n`pathname` can then be passed to a router or something.\n\n## LICENSE\n\n(The MIT License)\n\nCopyright (c) 2014 Jonathan Ong <me@jongleberry.com>\n\nPermission is hereby granted, free of charge, to any person obtaining\na copy of this software and associated documentation files (the\n'Software'), to deal in the Software without restriction, including\nwithout limitation the rights to use, copy, modify, merge, publish,\ndistribute, sublicense, and/or sell copies of the Software, and to\npermit persons to whom the Software is furnished to do so, subject to\nthe following conditions:\n\nThe above copyright notice and this permission notice shall be\nincluded in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\nMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.\nIN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,\nTORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE\nSOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.",
"readme":"# ms.js: miliseconds conversion utility\n\n```js\nms('1d') // 86400000\nms('10h') // 36000000\nms('2h') // 7200000\nms('1m') // 60000\nms('5s') // 5000\nms('100') // 100\n```\n\n```js\nms(60000) // \"1m\"\nms(2 * 60000) // \"2m\"\nms(ms('10 hours')) // \"10h\"\n```\n\n```js\nms(60000, { long: true }) // \"1 minute\"\nms(2 * 60000, { long: true }) // \"2 minutes\"\nms(ms('10 hours', { long: true })) // \"10 hours\"\n```\n\n- Node/Browser compatible. Published as `ms` in NPM.\n- If a number is supplied to `ms`, a string with a unit is returned.\n- If a string that contains the number is supplied, it returns it as\na number (e.g: it returns `100` for `'100'`).\n- If you pass a string with a number and a valid unit, the number of\nequivalent ms is returned.\n\n## License\n\nMIT",
"readme":"# serve-static\n\n[](http://badge.fury.io/js/serve-static)\n[](https://travis-ci.org/expressjs/serve-static)\n[](https://coveralls.io/r/expressjs/serve-static)\n\nPreviously `connect.static()`.\n\n## Install\n\n```sh\n$ npm install serve-static\n```\n\n## API\n\n```js\nvar serveStatic = require('serve-static')\n```\n\n### serveStatic(root, options)\n\nCreate a new middleware function to serve files from within a given root\ndirectory. The file to serve will be determined by combining `req.url`\nwith the provided root directory.\n\nOptions:\n\n- `hidden` Allow transfer of hidden files. defaults to `false`\n- `index` Default file name, defaults to `'index.html'`\n- `maxAge` Browser cache maxAge in milliseconds. defaults to `0`\n- `redirect` Redirect to trailing \"/\" when the pathname is a dir. defaults to `true`\n\n## Examples\n\n### Serve files with vanilla node.js http server\n\n```js\nvar finalhandler = require('finalhandler')\nvar http = require('http')\nvar serveStatic = require('serve-static')\n\n// Serve up public/ftp folder\nvar serve = serveStatic('public/ftp', {'index': ['index.html', 'index.htm']})\n\n// Create server\nvar server = http.createServer(function(req, res){\n var done = finalhandler(req, res)\n serve(req, res, done)\n})\n\n// Listen\nserver.listen(3000)\n```\n\n### Serve all files from ftp folder\n\n```js\nvar connect = require('connect')\nvar serveStatic = require('serve-static')\n\nvar app = connect()\n\napp.use(serveStatic('public/ftp', {'index': ['default.html', 'default.htm']}))\napp.listen(3000)\n```\n\n## License\n\nThe MIT License (MIT)\n\nCopyright (c) 2014 Douglas Christopher Wilson\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in\nall copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\nTHE SOFTWARE.\n",
@@ -8,10 +9,10 @@ The ultimate javascript content-type utility.
$ npm install mime-types
```
#### Similar to [mime](https://github.com/broofa/node-mime) except:
#### Similar to [node-mime](https://github.com/broofa/node-mime), except:
- __No fallbacks.__ Instead of naively returning the first available type, `mime-types` simply returns `false`, so do `var type = mime.lookup('unrecognized') || 'application/octet-stream'`.
- No `new Mime()` business, so you could do `var lookup = require('mime-types').lookup`.
- No fallbacks, so do `var type = mime.lookup('unrecognized') || 'application/octet-stream'`.
- Additional mime types are added such as jade and stylus. Feel free to add more!
- Browser support via Browserify and Component by converting lists to JSON files.
"readme":"# mime-types [](https://travis-ci.org/expressjs/mime-types) [](https://badge.fury.io/js/mime-types)\n\nThe ultimate javascript content-type utility.\n\n### Install\n\n```sh\n$ npm install mime-types\n```\n\n#### Similar to [mime](https://github.com/broofa/node-mime) except:\n\n- No `new Mime()` business, so you could do `var lookup = require('mime-types').lookup`.\n- No fallbacks, so do `var type = mime.lookup('unrecognized') || 'application/octet-stream'`.\n- Additional mime types are added such as jade and stylus. Feel free to add more!\n- Browser support via Browserify and Component by converting lists to JSON files.\n\nOtherwise, the API is compatible.\n\n### Adding Types\n\nIf you'd like to add additional types,\nsimply create a PR adding the type to `custom.json` and\na reference link to the [sources](SOURCES.md).\n\nDo __NOT__ edit `mime.json` or `node.json`.\nThose are pulled using `build.js`.\nYou should only touch `custom.json`.\n\n## API\n\n```js\nvar mime = require('mime-types')\n```\n\nAll functions return `false` if input is invalid or not found.\n\n### mime.lookup(path)\n\nLookup the content-type associated with a file.\n\n```js\nmime.lookup('json') // 'application/json'\nmime.lookup('.md') // 'text/x-markdown'\nmime.lookup('file.html') // 'text/html'\nmime.lookup('folder/file.js') // 'application/javascript'\n\nmime.lookup('cats') // false\n```\n\n### mime.contentType(type)\n\nCreate a full content-type header given a content-type or extension.\n\n```js\nmime.contentType('markdown') // 'text/x-markdown; charset=utf-8'\nmime.contentType('file.json') // 'application/json; charset=utf-8'\n```\n\n### mime.extension(type)\n\nGet the default extension for a content-type.\n\n```js\nmime.extension('application/octet-stream') // 'bin'\n```\n\n### mime.charset(type)\n\nLookup the implied default charset of a content-type.\n\n```js\nmime.charset('text/x-markdown') // 'UTF-8'\n```\n\n### mime.types[extension] = type\n\nA map of content-types by extension.\n\n### mime.extensions[type] = [extensions]\n\nA map of extensions by content-type.\n\n### mime.define(types)\n\nGlobally add definitions.\n`types` must be an object of the form:\n\n```js\n{\n\"<content-type>\": [extensions...],\n\"<content-type>\": [extensions...]\n}\n```\n\nSee the `.json` files in `lib/` for examples.\n\n## License\n\n[MIT](LICENSE)\n",
"readme":"# mime-types\n[](https://badge.fury.io/js/mime-types) [](https://travis-ci.org/expressjs/mime-types)\n\nThe ultimate javascript content-type utility.\n\n### Install\n\n```sh\n$ npm install mime-types\n```\n\n#### Similar to [node-mime](https://github.com/broofa/node-mime), except:\n\n- __No fallbacks.__ Instead of naively returning the first available type, `mime-types` simply returns `false`, so do `var type = mime.lookup('unrecognized') || 'application/octet-stream'`.\n- No `new Mime()` business, so you could do `var lookup = require('mime-types').lookup`.\n- Additional mime types are added such as jade and stylus. Feel free to add more!\n- Browser support via Browserify and Component by converting lists to JSON files.\n\nOtherwise, the API is compatible.\n\n### Adding Types\n\nIf you'd like to add additional types,\nsimply create a PR adding the type to `custom.json` and\na reference link to the [sources](SOURCES.md).\n\nDo __NOT__ edit `mime.json` or `node.json`.\nThose are pulled using `build.js`.\nYou should only touch `custom.json`.\n\n## API\n\n```js\nvar mime = require('mime-types')\n```\n\nAll functions return `false` if input is invalid or not found.\n\n### mime.lookup(path)\n\nLookup the content-type associated with a file.\n\n```js\nmime.lookup('json') // 'application/json'\nmime.lookup('.md') // 'text/x-markdown'\nmime.lookup('file.html') // 'text/html'\nmime.lookup('folder/file.js') // 'application/javascript'\n\nmime.lookup('cats') // false\n```\n\n### mime.contentType(type)\n\nCreate a full content-type header given a content-type or extension.\n\n```js\nmime.contentType('markdown') // 'text/x-markdown; charset=utf-8'\nmime.contentType('file.json') // 'application/json; charset=utf-8'\n```\n\n### mime.extension(type)\n\nGet the default extension for a content-type.\n\n```js\nmime.extension('application/octet-stream') // 'bin'\n```\n\n### mime.charset(type)\n\nLookup the implied default charset of a content-type.\n\n```js\nmime.charset('text/x-markdown') // 'UTF-8'\n```\n\n### mime.types[extension] = type\n\nA map of content-types by extension.\n\n### mime.extensions[type] = [extensions]\n\nA map of extensions by content-type.\n\n### mime.define(types)\n\nGlobally add definitions.\n`types` must be an object of the form:\n\n```js\n{\n\"<content-type>\": [extensions...],\n\"<content-type>\": [extensions...]\n}\n```\n\nSee the `.json` files in `lib/` for examples.\n\n## License\n\n[MIT](LICENSE)\n",
"readme":"# type-is [](https://travis-ci.org/expressjs/type-is) [](https://badge.fury.io/js/type-is)\n\nInfer the content-type of a request.\n\n### Install\n\n```sh\n$ npm install type-is\n```\n\n## API\n\n```js\nvar http = require('http')\nvar is = require('type-is')\n\nhttp.createServer(function (req, res) {\n is(req, ['text/*'])\n})\n```\n\n### type = is(request, types)\n\n`request` is the node HTTP request. `types` is an array of types.\n\n```js\n// req.headers.content-type = 'application/json'\n\nis(req, ['json']) // 'json'\nis(req, ['html', 'json']) // 'json'\nis(req, ['application/*']) // 'application/json'\nis(req, ['application/json']) // 'application/json'\n\nis(req, ['html']) // false\n```\n\n#### Each type can be:\n\n- An extension name such as `json`. This name will be returned if matched.\n- A mime type such as `application/json`.\n- A mime type with a wildcard such as `*/json` or `application/*`. The full mime type will be returned if matched\n- A suffix such as `+json`. This can be combined with a wildcard such as `*/vnd+json` or `application/*+json`. The full mime type will be returned if matched.\n\n`false` will be returned if no type matches.\n\n## Examples\n\n#### Example body parser\n\n```js\nvar is = require('type-is');\nvar parse = require('body');\nvar busboy = require('busboy');\n\nfunction bodyParser(req, res, next) {\n var hasRequestBody = 'content-type' in req.headers\n || 'transfer-encoding' in req.headers;\n if (!hasRequestBody) return next();\n\n switch (is(req, ['urlencoded', 'json', 'multipart'])) {\n case 'urlencoded':\n // parse urlencoded body\n break\n case 'json':\n // parse json body\n break\n case 'multipart':\n // parse multipart body\n break\n default:\n // 415 error code\n }\n}\n```\n\n## License\n\nThe MIT License (MIT)\n\nCopyright (c) 2013 Jonathan Ong me@jongleberry.com\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in\nall copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\nTHE SOFTWARE.\n",
"readme":"# type-is\n\n[](https://badge.fury.io/js/type-is)\n[](https://travis-ci.org/expressjs/type-is)\n[](https://coveralls.io/r/expressjs/type-is)\n\nInfer the content-type of a request.\n\n### Install\n\n```sh\n$ npm install type-is\n```\n\n## API\n\n```js\nvar http = require('http')\nvar is = require('type-is')\n\nhttp.createServer(function (req, res) {\n var istext = is(req, ['text/*'])\n res.end('you ' + (istext ? 'sent' : 'did not send') + ' me text')\n})\n```\n\n### type = is(request, types)\n\n`request` is the node HTTP request. `types` is an array of types.\n\n```js\n// req.headers.content-type = 'application/json'\n\nis(req, ['json']) // 'json'\nis(req, ['html', 'json']) // 'json'\nis(req, ['application/*']) // 'application/json'\nis(req, ['application/json']) // 'application/json'\n\nis(req, ['html']) // false\n```\n\n#### Each type can be:\n\n- An extension name such as `json`. This name will be returned if matched.\n- A mime type such as `application/json`.\n- A mime type with a wildcard such as `*/json` or `application/*`. The full mime type will be returned if matched\n- A suffix such as `+json`. This can be combined with a wildcard such as `*/vnd+json` or `application/*+json`. The full mime type will be returned if matched.\n\n`false` will be returned if no type matches.\n\n## Examples\n\n#### Example body parser\n\n```js\nvar is = require('type-is');\nvar parse = require('body');\nvar busboy = require('busboy');\n\nfunction bodyParser(req, res, next) {\n if (!is.hasBody(req)) return next();\n\n switch (is(req, ['urlencoded', 'json', 'multipart'])) {\n case 'urlencoded':\n // parse urlencoded body\n break\n case 'json':\n // parse json body\n break\n case 'multipart':\n // parse multipart body\n break\n default:\n // 415 error code\n }\n}\n```\n\n## License\n\nThe MIT License (MIT)\n\nCopyright (c) 2013 Jonathan Ong me@jongleberry.com\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in\nall copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\nTHE SOFTWARE.\n",
"readme":"[](http://expressjs.com/)\n\n Fast, unopinionated, minimalist web framework for [node](http://nodejs.org).\n\n [](http://badge.fury.io/js/express)\n [](https://travis-ci.org/visionmedia/express)\n [](https://coveralls.io/r/visionmedia/express)\n [](https://www.gittip.com/visionmedia/)\n\n```js\nvar express = require('express');\nvar app = express();\n\napp.get('/', function(req, res){\n res.send('Hello World');\n});\n\napp.listen(3000);\n```\n\n**PROTIP** Be sure to read [Migrating from 3.x to 4.x](https://github.com/visionmedia/express/wiki/Migrating-from-3.x-to-4.x) as well as [New features in 4.x](https://github.com/visionmedia/express/wiki/New-features-in-4.x).\n\n## Installation\n\n $ npm install express\n\n## Quick Start\n\n The quickest way to get started with express is to utilize the executable [`express(1)`](http://github.com/expressjs/generator) to generate an application as shown below:\n\n Install the executable. The executable's major version will match Express's:\n\n $ npm install -g express-generator@3\n\n Create the app:\n\n $ express /tmp/foo && cd /tmp/foo\n\n Install dependencies:\n\n $ npm install\n\n Start the server:\n\n $ npm start\n\n## Features\n\n * Robust routing\n * HTTP helpers (redirection, caching, etc)\n * View system supporting 14+ template engines\n * Content negotiation\n * Focus on high performance\n * Executable for generating applications quickly\n * High test coverage\n\n## Philosophy\n\n The Express philosophy is to provide small, robust tooling for HTTP servers, making\n it a great solution for single page applications, web sites, hybrids, or public\n HTTP APIs.\n\n Express does not force you to use any specific ORM or template engine. With support for over\n 14 template engines via [Consolidate.js](http://github.com/visionmedia/consolidate.js),\n you can quickly craft your perfect framework.\n\n## More Information\n\n * [Website and Documentation](http://expressjs.com/) stored at [visionmedia/expressjs.com](https://github.com/visionmedia/expressjs.com)\n * Join #express on freenode\n * [Google Group](http://groups.google.com/group/express-js) for discussion\n * Follow [tjholowaychuk](http://twitter.com/tjholowaychuk) and [defunctzombie](https://twitter.com/defunctzombie) on twitter for updates\n * Visit the [Wiki](http://github.com/visionmedia/express/wiki)\n * [Русскоязычная документация](http://jsman.ru/express/)\n * Run express examples [online](https://runnable.com/express)\n\n## Viewing Examples\n\nClone the Express repo, then install the dev dependencies to install all the example / test suite dependencies:\n\n $ git clone git://github.com/visionmedia/express.git --depth 1\n $ cd express\n $ npm install\n\nThen run whichever tests you want:\n\n $ node examples/content-negotiation\n\nYou can also view live examples here:\n\n<a href=\"https://runnable.com/express\" target=\"_blank\"><img src=\"https://runnable.com/external/styles/assets/runnablebtn.png\" style=\"width:67px;height:25px;\"></a>\n\n## Running Tests\n\nTo run the test suite, first invoke the following command within the repo, installing the development dependencies:\n\n $ npm install\n\nThen run the tests:\n\n```sh\n$ npm test\n```\n\n## Contributors\n\n Author: [TJ Holowaychuk](http://github.com/visionmedia) \n Lead Maintainer: [Roman Shtylman](https://github.com/defunctzombie) \n Contributors: https://github.com/visionmedia/express/graphs/contributors \n\n## License\n\nMIT\n",
"readme":"[](https://expressjs.com/)\n\n Fast, unopinionated, minimalist web framework for [node](https://nodejs.org).\n\n [](https://badge.fury.io/js/express)\n [](https://travis-ci.org/visionmedia/express)\n [](https://coveralls.io/r/visionmedia/express)\n [](https://www.gittip.com/visionmedia/)\n\n```js\nvar express = require('express')\nvar app = express()\n\napp.get('/', function (req, res) {\n res.send('Hello World')\n})\n\napp.listen(3000)\n```\n\n **PROTIP** Be sure to read [Migrating from 3.x to 4.x](https://github.com/visionmedia/express/wiki/Migrating-from-3.x-to-4.x) as well as [New features in 4.x](https://github.com/visionmedia/express/wiki/New-features-in-4.x).\n\n### Installation\n\n```bash\n$ npm install express\n```\n\n## Quick Start\n\n The quickest way to get started with express is to utilize the executable [`express(1)`](https://github.com/expressjs/generator) to generate an application as shown below:\n\n Install the executable. The executable's major version will match Express's:\n\n```bash\n$ npm install -g express-generator@4\n```\n\n Create the app:\n\n```bash\n$ express /tmp/foo && cd /tmp/foo\n```\n\n Install dependencies:\n\n```bash\n$ npm install\n```\n\n Start the server:\n\n```bash\n$ npm start\n```\n\n## Features\n\n * Robust routing\n * HTTP helpers (redirection, caching, etc)\n * View system supporting 14+ template engines\n * Content negotiation\n * Focus on high performance\n * Executable for generating applications quickly\n * High test coverage\n\n## Philosophy\n\n The Express philosophy is to provide small, robust tooling for HTTP servers, making\n it a great solution for single page applications, web sites, hybrids, or public\n HTTP APIs.\n\n Express does not force you to use any specific ORM or template engine. With support for over\n 14 template engines via [Consolidate.js](https://github.com/visionmedia/consolidate.js),\n you can quickly craft your perfect framework.\n\n## More Information\n\n * [Website and Documentation](http://expressjs.com/) - [[website repo](https://github.com/visionmedia/expressjs.com)]\n * [Github Organization](https://github.com/expressjs) for Official Middleware & Modules\n * [#express](https://webchat.freenode.net/?channels=express) on freenode IRC\n * Visit the [Wiki](https://github.com/visionmedia/express/wiki)\n * [Google Group](https://groups.google.com/group/express-js) for discussion\n * [Русскоязычная документация](http://jsman.ru/express/)\n * Run express examples [online](https://runnable.com/express)\n\n## Viewing Examples\n\n Clone the Express repo, then install the dev dependencies to install all the example / test suite dependencies:\n\n```bash\n$ git clone git://github.com/visionmedia/express.git --depth 1\n$ cd express\n$ npm install\n```\n\n Then run whichever example you want:\n\n $ node examples/content-negotiation\n\n You can also view live examples here:\n\n <a href=\"https://runnable.com/express\" target=\"_blank\"><img src=\"https://runnable.com/external/styles/assets/runnablebtn.png\" style=\"width:67px;height:25px;\"></a>\n\n## Running Tests\n\n To run the test suite, first invoke the following command within the repo, installing the development dependencies:\n\n```bash\n$ npm install\n```\n\n Then run the tests:\n\n```bash\n$ npm test\n```\n\n### Contributors\n\n * Author: [TJ Holowaychuk](https://github.com/visionmedia)\n * Lead Maintainer: [Douglas Christopher Wilson](https://github.com/dougwilson)\n * [All Contributors](https://github.com/visionmedia/express/graphs/contributors)\n\n### License\n\n [MIT](LICENSE)\n",
"readme":"\n# debug\n\n tiny node.js debugging utility.\n\n## Installation\n\n```\n$ npm install debug\n```\n\n## Example\n\n This module is modelled after node core's debugging technique, allowing you to enable one or more topic-specific debugging functions, for example core does the following within many modules:\n\n```js\nvar debug;\nif (process.env.NODE_DEBUG && /cluster/.test(process.env.NODE_DEBUG)) {\n debug = function(x) {\n var prefix = process.pid + ',' +\n (process.env.NODE_WORKER_ID ? 'Worker' : 'Master');\n console.error(prefix, x);\n };\n} else {\n debug = function() { };\n}\n```\n\n This concept is extremely simple but it works well. With `debug` you simply invoke the exported function to generate your debug function, passing it a name which will determine if a noop function is returned, or a decorated `console.error`, so all of the `console` format string goodies you're used to work fine. A unique color is selected per-function for visibility.\n\nExample _app.js_:\n\n```js\nvar debug = require('debug')('http')\n , http = require('http')\n , name = 'My App';\n\n// fake app\n\ndebug('booting %s', name);\n\nhttp.createServer(function(req, res){\n debug(req.method + ' ' + req.url);\n res.end('hello\\n');\n}).listen(3000, function(){\n debug('listening');\n});\n\n// fake worker of some kind\n\nrequire('./worker');\n```\n\nExample _worker.js_:\n\n```js\nvar debug = require('debug')('worker');\n\nsetInterval(function(){\n debug('doing some work');\n}, 1000);\n```\n\n The __DEBUG__ environment variable is then used to enable these based on space or comma-delimited names. Here are some examples:\n\n \n\n \n\n## Millisecond diff\n\n When actively developing an application it can be useful to see when the time spent between one `debug()` call and the next. Suppose for example you invoke `debug()` before requesting a resource, and after as well, the \"+NNNms\" will show you how much time was spent between calls.\n\n \n\n When stdout is not a TTY, `Date#toUTCString()` is used, making it more useful for logging the debug information as shown below:\n\n \n\n## Conventions\n\n If you're using this in one or more of your libraries, you _should_ use the name of your library so that developers may toggle debugging as desired without guessing names. If you have more than one debuggers you _should_ prefix them with your library name and use \":\" to separate features. For example \"bodyParser\" from Connect would then be \"connect:bodyParser\". \n\n## Wildcards\n\n The \"*\" character may be used as a wildcard. Suppose for example your library has debuggers named \"connect:bodyParser\", \"connect:compress\", \"connect:session\", instead of listing all three with `DEBUG=connect:bodyParser,connect.compress,connect:session`, you may simply do `DEBUG=connect:*`, or to run everything using this module simply use `DEBUG=*`.\n\n You can also exclude specific debuggers by prefixing them with a \"-\" character. For example, `DEBUG=* -connect:*` would include all debuggers except those starting with \"connect:\".\n\n## Browser support\n\n Debug works in the browser as well, currently persisted by `localStorage`. For example if you have `worker:a` and `worker:b` as shown below, and wish to debug both type `debug.enable('worker:*')` in the console and refresh the page, this will remain until you disable with `debug.disable()`. \n\n```js\na = debug('worker:a');\nb = debug('worker:b');\n\nsetInterval(function(){\n a('doing some work');\n}, 1000);\n\nsetInterval(function(){\n a('doing some work');\n}, 1200);\n```\n\n## License \n\n(The MIT License)\n\nCopyright (c) 2011 TJ Holowaychuk <tj@vision-media.ca>\n\nPermission is hereby granted, free of charge, to any person obtaining\na copy of this software and associated documentation files (the\n'Software'), to deal in the Software without restriction, including\nwithout limitation the rights to use, copy, modify, merge, publish,\ndistribute, sublicense, and/or sell copies of the Software, and to\npermit persons to whom the Software is furnished to do so, subject to\nthe following conditions:\n\nThe above copyright notice and this permission notice shall be\nincluded in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\nMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.\nIN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,\nTORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE\nSOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.",
