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(The MIT License)
Copyright (c) 2009-2014 TJ Holowaychuk <tj@vision-media.ca>
Copyright (c) 2013-2014 Roman Shtylman <shtylman+expressjs@gmail.com>
Copyright (c) 2014-2015 Douglas Christopher Wilson <doug@somethingdoug.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.

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[![Express Logo](https://i.cloudup.com/zfY6lL7eFa-3000x3000.png)](http://expressjs.com/)
Fast, unopinionated, minimalist web framework for [node](http://nodejs.org).
[![NPM Version][npm-image]][npm-url]
[![NPM Downloads][downloads-image]][downloads-url]
[![Linux Build][travis-image]][travis-url]
[![Windows Build][appveyor-image]][appveyor-url]
[![Test Coverage][coveralls-image]][coveralls-url]
```js
const express = require('express')
const app = express()
app.get('/', function (req, res) {
res.send('Hello World')
})
app.listen(3000)
```
## Installation
This is a [Node.js](https://nodejs.org/en/) module available through the
[npm registry](https://www.npmjs.com/).
Before installing, [download and install Node.js](https://nodejs.org/en/download/).
Node.js 0.10 or higher is required.
Installation is done using the
[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
```bash
$ npm install express
```
Follow [our installing guide](http://expressjs.com/en/starter/installing.html)
for more information.
## Features
* Robust routing
* Focus on high performance
* Super-high test coverage
* HTTP helpers (redirection, caching, etc)
* View system supporting 14+ template engines
* Content negotiation
* Executable for generating applications quickly
## Docs & Community
* [Website and Documentation](http://expressjs.com/) - [[website repo](https://github.com/expressjs/expressjs.com)]
* [#express](https://webchat.freenode.net/?channels=express) on freenode IRC
* [GitHub Organization](https://github.com/expressjs) for Official Middleware & Modules
* Visit the [Wiki](https://github.com/expressjs/express/wiki)
* [Google Group](https://groups.google.com/group/express-js) for discussion
* [Gitter](https://gitter.im/expressjs/express) for support and discussion
**PROTIP** Be sure to read [Migrating from 3.x to 4.x](https://github.com/expressjs/express/wiki/Migrating-from-3.x-to-4.x) as well as [New features in 4.x](https://github.com/expressjs/express/wiki/New-features-in-4.x).
### Security Issues
If you discover a security vulnerability in Express, please see [Security Policies and Procedures](Security.md).
## Quick Start
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:
```bash
$ npm install -g express-generator@4
```
Create the app:
```bash
$ express /tmp/foo && cd /tmp/foo
```
Install dependencies:
```bash
$ npm install
```
Start the server:
```bash
$ npm start
```
View the website at: http://localhost:3000
## Philosophy
The Express philosophy is to provide small, robust tooling for HTTP servers, making
it a great solution for single page applications, web sites, hybrids, or public
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](https://github.com/tj/consolidate.js),
you can quickly craft your perfect framework.
## Examples
To view the examples, clone the Express repo and install the dependencies:
```bash
$ git clone git://github.com/expressjs/express.git --depth 1
$ cd express
$ npm install
```
Then run whichever example you want:
```bash
$ node examples/content-negotiation
```
## Tests
To run the test suite, first install the dependencies, then run `npm test`:
```bash
$ npm install
$ npm test
```
## Contributing
[Contributing Guide](Contributing.md)
## People
The original author of Express is [TJ Holowaychuk](https://github.com/tj)
The current lead maintainer is [Douglas Christopher Wilson](https://github.com/dougwilson)
[List of all contributors](https://github.com/expressjs/express/graphs/contributors)
## License
[MIT](LICENSE)
[npm-image]: https://img.shields.io/npm/v/express.svg
[npm-url]: https://npmjs.org/package/express
[downloads-image]: https://img.shields.io/npm/dm/express.svg
[downloads-url]: https://npmjs.org/package/express
[travis-image]: https://img.shields.io/travis/expressjs/express/master.svg?label=linux
[travis-url]: https://travis-ci.org/expressjs/express
[appveyor-image]: https://img.shields.io/appveyor/ci/dougwilson/express/master.svg?label=windows
[appveyor-url]: https://ci.appveyor.com/project/dougwilson/express
[coveralls-image]: https://img.shields.io/coveralls/expressjs/express/master.svg
[coveralls-url]: https://coveralls.io/r/expressjs/express?branch=master

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
module.exports = require('./lib/express');

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @private
*/
var finalhandler = require('finalhandler');
var Router = require('./router');
var methods = require('methods');
var middleware = require('./middleware/init');
var query = require('./middleware/query');
var debug = require('debug')('express:application');
var View = require('./view');
var http = require('http');
var compileETag = require('./utils').compileETag;
var compileQueryParser = require('./utils').compileQueryParser;
var compileTrust = require('./utils').compileTrust;
var deprecate = require('depd')('express');
var flatten = require('array-flatten');
var merge = require('utils-merge');
var resolve = require('path').resolve;
var setPrototypeOf = require('setprototypeof')
var slice = Array.prototype.slice;
/**
* Application prototype.
*/
var app = exports = module.exports = {};
/**
* Variable for trust proxy inheritance back-compat
* @private
*/
var trustProxyDefaultSymbol = '@@symbol:trust_proxy_default';
/**
* Initialize the server.
*
* - setup default configuration
* - setup default middleware
* - setup route reflection methods
*
* @private
*/
app.init = function init() {
this.cache = {};
this.engines = {};
this.settings = {};
this.defaultConfiguration();
};
/**
* Initialize application configuration.
* @private
*/
app.defaultConfiguration = function defaultConfiguration() {
var env = process.env.NODE_ENV || 'development';
// default settings
this.enable('x-powered-by');
this.set('etag', 'weak');
this.set('env', env);
this.set('query parser', 'extended');
this.set('subdomain offset', 2);
this.set('trust proxy', false);
// trust proxy inherit back-compat
Object.defineProperty(this.settings, trustProxyDefaultSymbol, {
configurable: true,
value: true
});
debug('booting in %s mode', env);
this.on('mount', function onmount(parent) {
// inherit trust proxy
if (this.settings[trustProxyDefaultSymbol] === true
&& typeof parent.settings['trust proxy fn'] === 'function') {
delete this.settings['trust proxy'];
delete this.settings['trust proxy fn'];
}
// inherit protos
setPrototypeOf(this.request, parent.request)
setPrototypeOf(this.response, parent.response)
setPrototypeOf(this.engines, parent.engines)
setPrototypeOf(this.settings, parent.settings)
});
// setup locals
this.locals = Object.create(null);
// top-most app is mounted at /
this.mountpath = '/';
// default locals
this.locals.settings = this.settings;
// default configuration
this.set('view', View);
this.set('views', resolve('views'));
this.set('jsonp callback name', 'callback');
if (env === 'production') {
this.enable('view cache');
}
Object.defineProperty(this, 'router', {
get: function() {
throw new Error('\'app.router\' is deprecated!\nPlease see the 3.x to 4.x migration guide for details on how to update your app.');
}
});
};
/**
* lazily adds the base router if it has not yet been added.
*
* We cannot add the base router in the defaultConfiguration because
* it reads app settings which might be set after that has run.
*
* @private
*/
app.lazyrouter = function lazyrouter() {
if (!this._router) {
this._router = new Router({
caseSensitive: this.enabled('case sensitive routing'),
strict: this.enabled('strict routing')
});
this._router.use(query(this.get('query parser fn')));
this._router.use(middleware.init(this));
}
};
/**
* Dispatch a req, res pair into the application. Starts pipeline processing.
*
* If no callback is provided, then default error handlers will respond
* in the event of an error bubbling through the stack.
*
* @private
*/
app.handle = function handle(req, res, callback) {
var router = this._router;
// final handler
var done = callback || finalhandler(req, res, {
env: this.get('env'),
onerror: logerror.bind(this)
});
// no routes
if (!router) {
debug('no routes defined on app');
done();
return;
}
router.handle(req, res, done);
};
/**
* Proxy `Router#use()` to add middleware to the app router.
* See Router#use() documentation for details.
*
* If the _fn_ parameter is an express app, then it will be
* mounted at the _route_ specified.
*
* @public
*/
app.use = function use(fn) {
var offset = 0;
var path = '/';
// default path to '/'
// disambiguate app.use([fn])
if (typeof fn !== 'function') {
var arg = fn;
while (Array.isArray(arg) && arg.length !== 0) {
arg = arg[0];
}
// first arg is the path
if (typeof arg !== 'function') {
offset = 1;
path = fn;
}
}
var fns = flatten(slice.call(arguments, offset));
if (fns.length === 0) {
throw new TypeError('app.use() requires a middleware function')
}
// setup router
this.lazyrouter();
var router = this._router;
fns.forEach(function (fn) {
// non-express app
if (!fn || !fn.handle || !fn.set) {
return router.use(path, fn);
}
debug('.use app under %s', path);
fn.mountpath = path;
fn.parent = this;
// restore .app property on req and res
router.use(path, function mounted_app(req, res, next) {
var orig = req.app;
fn.handle(req, res, function (err) {
setPrototypeOf(req, orig.request)
setPrototypeOf(res, orig.response)
next(err);
});
});
// mounted an app
fn.emit('mount', this);
}, this);
return this;
};
/**
* Proxy to the app `Router#route()`
* Returns a new `Route` instance for the _path_.
*
* Routes are isolated middleware stacks for specific paths.
* See the Route api docs for details.
*
* @public
*/
app.route = function route(path) {
this.lazyrouter();
return this._router.route(path);
};
/**
* Register the given template engine callback `fn`
* as `ext`.
*
* By default will `require()` the engine based on the
* file extension. For example if you try to render
* a "foo.ejs" file Express will invoke the following internally:
*
* app.engine('ejs', require('ejs').__express);
*
* For engines that do not provide `.__express` out of the box,
* or if you wish to "map" a different extension to the template engine
* you may use this method. For example mapping the EJS template engine to
* ".html" files:
*
* app.engine('html', require('ejs').renderFile);
*
* In this case EJS provides a `.renderFile()` method with
* the same signature that Express expects: `(path, options, callback)`,
* though note that it aliases this method as `ejs.__express` internally
* so if you're using ".ejs" extensions you dont need to do anything.
*
* Some template engines do not follow this convention, the
* [Consolidate.js](https://github.com/tj/consolidate.js)
* library was created to map all of node's popular template
* engines to follow this convention, thus allowing them to
* work seamlessly within Express.
*
* @param {String} ext
* @param {Function} fn
* @return {app} for chaining
* @public
*/
app.engine = function engine(ext, fn) {
if (typeof fn !== 'function') {
throw new Error('callback function required');
}
// get file extension
var extension = ext[0] !== '.'
? '.' + ext
: ext;
// store engine
this.engines[extension] = fn;
return this;
};
/**
* Proxy to `Router#param()` with one added api feature. The _name_ parameter
* can be an array of names.
*
* See the Router#param() docs for more details.
*
* @param {String|Array} name
* @param {Function} fn
* @return {app} for chaining
* @public
*/
app.param = function param(name, fn) {
this.lazyrouter();
if (Array.isArray(name)) {
for (var i = 0; i < name.length; i++) {
this.param(name[i], fn);
}
return this;
}
this._router.param(name, fn);
return this;
};
/**
* Assign `setting` to `val`, or return `setting`'s value.
*
* app.set('foo', 'bar');
* app.set('foo');
* // => "bar"
*
* Mounted servers inherit their parent server's settings.
*
* @param {String} setting
* @param {*} [val]
* @return {Server} for chaining
* @public
*/
app.set = function set(setting, val) {
if (arguments.length === 1) {
// app.get(setting)
return this.settings[setting];
}
debug('set "%s" to %o', setting, val);
// set value
this.settings[setting] = val;
// trigger matched settings
switch (setting) {
case 'etag':
this.set('etag fn', compileETag(val));
break;
case 'query parser':
this.set('query parser fn', compileQueryParser(val));
break;
case 'trust proxy':
this.set('trust proxy fn', compileTrust(val));
// trust proxy inherit back-compat
Object.defineProperty(this.settings, trustProxyDefaultSymbol, {
configurable: true,
value: false
});
break;
}
return this;
};
/**
* Return the app's absolute pathname
* based on the parent(s) that have
* mounted it.
*
* For example if the application was
* mounted as "/admin", which itself
* was mounted as "/blog" then the
* return value would be "/blog/admin".
*
* @return {String}
* @private
*/
app.path = function path() {
return this.parent
? this.parent.path() + this.mountpath
: '';
};
/**
* Check if `setting` is enabled (truthy).
*
* app.enabled('foo')
* // => false
*
* app.enable('foo')
* app.enabled('foo')
* // => true
*
* @param {String} setting
* @return {Boolean}
* @public
*/
app.enabled = function enabled(setting) {
return Boolean(this.set(setting));
};
/**
* Check if `setting` is disabled.
*
* app.disabled('foo')
* // => true
*
* app.enable('foo')
* app.disabled('foo')
* // => false
*
* @param {String} setting
* @return {Boolean}
* @public
*/
app.disabled = function disabled(setting) {
return !this.set(setting);
};
/**
* Enable `setting`.
*
* @param {String} setting
* @return {app} for chaining
* @public
*/
app.enable = function enable(setting) {
return this.set(setting, true);
};
/**
* Disable `setting`.
*
* @param {String} setting
* @return {app} for chaining
* @public
*/
app.disable = function disable(setting) {
return this.set(setting, false);
};
/**
* Delegate `.VERB(...)` calls to `router.VERB(...)`.
*/
methods.forEach(function(method){
app[method] = function(path){
if (method === 'get' && arguments.length === 1) {
// app.get(setting)
return this.set(path);
}
this.lazyrouter();
var route = this._router.route(path);
route[method].apply(route, slice.call(arguments, 1));
return this;
};
});
/**
* Special-cased "all" method, applying the given route `path`,
* middleware, and callback to _every_ HTTP method.
*
* @param {String} path
* @param {Function} ...
* @return {app} for chaining
* @public
*/
app.all = function all(path) {
this.lazyrouter();
var route = this._router.route(path);
var args = slice.call(arguments, 1);
for (var i = 0; i < methods.length; i++) {
route[methods[i]].apply(route, args);
}
return this;
};
// del -> delete alias
app.del = deprecate.function(app.delete, 'app.del: Use app.delete instead');
/**
* Render the given view `name` name with `options`
* and a callback accepting an error and the
* rendered template string.
*
* Example:
*
* app.render('email', { name: 'Tobi' }, function(err, html){
* // ...
* })
*
* @param {String} name
* @param {Object|Function} options or fn
* @param {Function} callback
* @public
*/
app.render = function render(name, options, callback) {
var cache = this.cache;
var done = callback;
var engines = this.engines;
var opts = options;
var renderOptions = {};
var view;
// support callback function as second arg
if (typeof options === 'function') {
done = options;
opts = {};
}
// merge app.locals
merge(renderOptions, this.locals);
// merge options._locals
if (opts._locals) {
merge(renderOptions, opts._locals);
}
// merge options
merge(renderOptions, opts);
// set .cache unless explicitly provided
if (renderOptions.cache == null) {
renderOptions.cache = this.enabled('view cache');
}
// primed cache
if (renderOptions.cache) {
view = cache[name];
}
// view
if (!view) {
var View = this.get('view');
view = new View(name, {
defaultEngine: this.get('view engine'),
root: this.get('views'),
engines: engines
});
if (!view.path) {
var dirs = Array.isArray(view.root) && view.root.length > 1
? 'directories "' + view.root.slice(0, -1).join('", "') + '" or "' + view.root[view.root.length - 1] + '"'
: 'directory "' + view.root + '"'
var err = new Error('Failed to lookup view "' + name + '" in views ' + dirs);
err.view = view;
return done(err);
}
// prime the cache
if (renderOptions.cache) {
cache[name] = view;
}
}
// render
tryRender(view, renderOptions, done);
};
/**
* Listen for connections.
*
* A node `http.Server` is returned, with this
* application (which is a `Function`) as its
* callback. If you wish to create both an HTTP
* and HTTPS server you may do so with the "http"
* and "https" modules as shown here:
*
* var http = require('http')
* , https = require('https')
* , express = require('express')
* , app = express();
*
* http.createServer(app).listen(80);
* https.createServer({ ... }, app).listen(443);
*
* @return {http.Server}
* @public
*/
app.listen = function listen() {
var server = http.createServer(this);
return server.listen.apply(server, arguments);
};
/**
* Log error using console.error.
*
* @param {Error} err
* @private
*/
function logerror(err) {
/* istanbul ignore next */
if (this.get('env') !== 'test') console.error(err.stack || err.toString());
}
/**
* Try rendering a view.
* @private
*/
function tryRender(view, options, callback) {
try {
view.render(options, callback);
} catch (err) {
callback(err);
}
}

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
*/
var bodyParser = require('body-parser')
var EventEmitter = require('events').EventEmitter;
var mixin = require('merge-descriptors');
var proto = require('./application');
var Route = require('./router/route');
var Router = require('./router');
var req = require('./request');
var res = require('./response');
/**
* Expose `createApplication()`.
*/
exports = module.exports = createApplication;
/**
* Create an express application.
*
* @return {Function}
* @api public
*/
function createApplication() {
var app = function(req, res, next) {
app.handle(req, res, next);
};
mixin(app, EventEmitter.prototype, false);
mixin(app, proto, false);
// expose the prototype that will get set on requests
app.request = Object.create(req, {
app: { configurable: true, enumerable: true, writable: true, value: app }
})
// expose the prototype that will get set on responses
app.response = Object.create(res, {
app: { configurable: true, enumerable: true, writable: true, value: app }
})
app.init();
return app;
}
/**
* Expose the prototypes.
*/
exports.application = proto;
exports.request = req;
exports.response = res;
/**
* Expose constructors.
*/
exports.Route = Route;
exports.Router = Router;
/**
* Expose middleware
*/
exports.json = bodyParser.json
exports.query = require('./middleware/query');
exports.raw = bodyParser.raw
exports.static = require('serve-static');
exports.text = bodyParser.text
exports.urlencoded = bodyParser.urlencoded
/**
* Replace removed middleware with an appropriate error message.
*/
var removedMiddlewares = [
'bodyParser',
'compress',
'cookieSession',
'session',
'logger',
'cookieParser',
'favicon',
'responseTime',
'errorHandler',
'timeout',
'methodOverride',
'vhost',
'csrf',
'directory',
'limit',
'multipart',
'staticCache'
]
removedMiddlewares.forEach(function (name) {
Object.defineProperty(exports, name, {
get: function () {
throw new Error('Most middleware (like ' + name + ') is no longer bundled with Express and must be installed separately. Please see https://github.com/senchalabs/connect#middleware.');
},
configurable: true
});
});

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @private
*/
var setPrototypeOf = require('setprototypeof')
/**
* Initialization middleware, exposing the
* request and response to each other, as well
* as defaulting the X-Powered-By header field.
*
* @param {Function} app
* @return {Function}
* @api private
*/
exports.init = function(app){
return function expressInit(req, res, next){
if (app.enabled('x-powered-by')) res.setHeader('X-Powered-By', 'Express');
req.res = res;
res.req = req;
req.next = next;
setPrototypeOf(req, app.request)
setPrototypeOf(res, app.response)
res.locals = res.locals || Object.create(null);
next();
};
};

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
*/
var merge = require('utils-merge')
var parseUrl = require('parseurl');
var qs = require('qs');
/**
* @param {Object} options
* @return {Function}
* @api public
*/
module.exports = function query(options) {
var opts = merge({}, options)
var queryparse = qs.parse;
if (typeof options === 'function') {
queryparse = options;
opts = undefined;
}
if (opts !== undefined && opts.allowPrototypes === undefined) {
// back-compat for qs module
opts.allowPrototypes = true;
}
return function query(req, res, next){
if (!req.query) {
var val = parseUrl(req).query;
req.query = queryparse(val, opts);
}
next();
};
};

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @private
*/
var accepts = require('accepts');
var deprecate = require('depd')('express');
var isIP = require('net').isIP;
var typeis = require('type-is');
var http = require('http');
var fresh = require('fresh');
var parseRange = require('range-parser');
var parse = require('parseurl');
var proxyaddr = require('proxy-addr');
/**
* Request prototype.
* @public
*/
var req = Object.create(http.IncomingMessage.prototype)
/**
* Module exports.
* @public
*/
module.exports = req
/**
* Return request header.
*
* The `Referrer` header field is special-cased,
* both `Referrer` and `Referer` are interchangeable.
*
* Examples:
*
* req.get('Content-Type');
* // => "text/plain"
*
* req.get('content-type');
* // => "text/plain"
*
* req.get('Something');
* // => undefined
*
* Aliased as `req.header()`.
*
* @param {String} name
* @return {String}
* @public
*/
req.get =
req.header = function header(name) {
if (!name) {
throw new TypeError('name argument is required to req.get');
}
if (typeof name !== 'string') {
throw new TypeError('name must be a string to req.get');
}
var lc = name.toLowerCase();
switch (lc) {
case 'referer':
case 'referrer':
return this.headers.referrer
|| this.headers.referer;
default:
return this.headers[lc];
}
};
/**
* To do: update docs.
*
* Check if the given `type(s)` is acceptable, returning
* the best match when true, otherwise `undefined`, in which
* case you should respond with 406 "Not Acceptable".
*
* The `type` value may be a single MIME type string
* such as "application/json", an extension name
* such as "json", a comma-delimited list such as "json, html, text/plain",
* an argument list such as `"json", "html", "text/plain"`,
* or an array `["json", "html", "text/plain"]`. When a list
* or array is given, the _best_ match, if any is returned.
*
* Examples:
*
* // Accept: text/html
* req.accepts('html');
* // => "html"
*
* // Accept: text/*, application/json
* req.accepts('html');
* // => "html"
* req.accepts('text/html');
* // => "text/html"
* req.accepts('json, text');
* // => "json"
* req.accepts('application/json');
* // => "application/json"
*
* // Accept: text/*, application/json
* req.accepts('image/png');
* req.accepts('png');
* // => undefined
*
* // Accept: text/*;q=.5, application/json
* req.accepts(['html', 'json']);
* req.accepts('html', 'json');
* req.accepts('html, json');
* // => "json"
*
* @param {String|Array} type(s)
* @return {String|Array|Boolean}
* @public
*/
req.accepts = function(){
var accept = accepts(this);
return accept.types.apply(accept, arguments);
};
/**
* Check if the given `encoding`s are accepted.
*
* @param {String} ...encoding
* @return {String|Array}
* @public
*/
req.acceptsEncodings = function(){
var accept = accepts(this);
return accept.encodings.apply(accept, arguments);
};
req.acceptsEncoding = deprecate.function(req.acceptsEncodings,
'req.acceptsEncoding: Use acceptsEncodings instead');
/**
* Check if the given `charset`s are acceptable,
* otherwise you should respond with 406 "Not Acceptable".
*
* @param {String} ...charset
* @return {String|Array}
* @public
*/
req.acceptsCharsets = function(){
var accept = accepts(this);
return accept.charsets.apply(accept, arguments);
};
req.acceptsCharset = deprecate.function(req.acceptsCharsets,
'req.acceptsCharset: Use acceptsCharsets instead');
/**
* Check if the given `lang`s are acceptable,
* otherwise you should respond with 406 "Not Acceptable".
*
* @param {String} ...lang
* @return {String|Array}
* @public
*/
req.acceptsLanguages = function(){
var accept = accepts(this);
return accept.languages.apply(accept, arguments);
};
req.acceptsLanguage = deprecate.function(req.acceptsLanguages,
'req.acceptsLanguage: Use acceptsLanguages instead');
/**
* Parse Range header field, capping to the given `size`.
*
* Unspecified ranges such as "0-" require knowledge of your resource length. In
* the case of a byte range this is of course the total number of bytes. If the
* Range header field is not given `undefined` is returned, `-1` when unsatisfiable,
* and `-2` when syntactically invalid.
*
* When ranges are returned, the array has a "type" property which is the type of
* range that is required (most commonly, "bytes"). Each array element is an object
* with a "start" and "end" property for the portion of the range.
*
* The "combine" option can be set to `true` and overlapping & adjacent ranges
* will be combined into a single range.
*
* NOTE: remember that ranges are inclusive, so for example "Range: users=0-3"
* should respond with 4 users when available, not 3.
*
* @param {number} size
* @param {object} [options]
* @param {boolean} [options.combine=false]
* @return {number|array}
* @public
*/
req.range = function range(size, options) {
var range = this.get('Range');
if (!range) return;
return parseRange(size, range, options);
};
/**
* Return the value of param `name` when present or `defaultValue`.
*
* - Checks route placeholders, ex: _/user/:id_
* - Checks body params, ex: id=12, {"id":12}
* - Checks query string params, ex: ?id=12
*
* To utilize request bodies, `req.body`
* should be an object. This can be done by using
* the `bodyParser()` middleware.
*
* @param {String} name
* @param {Mixed} [defaultValue]
* @return {String}
* @public
*/
req.param = function param(name, defaultValue) {
var params = this.params || {};
var body = this.body || {};
var query = this.query || {};
var args = arguments.length === 1
? 'name'
: 'name, default';
deprecate('req.param(' + args + '): Use req.params, req.body, or req.query instead');
if (null != params[name] && params.hasOwnProperty(name)) return params[name];
if (null != body[name]) return body[name];
if (null != query[name]) return query[name];
return defaultValue;
};
/**
* Check if the incoming request contains the "Content-Type"
* header field, and it contains the give mime `type`.
*
* Examples:
*
* // With Content-Type: text/html; charset=utf-8
* req.is('html');
* req.is('text/html');
* req.is('text/*');
* // => true
*
* // When Content-Type is application/json
* req.is('json');
* req.is('application/json');
* req.is('application/*');
* // => true
*
* req.is('html');
* // => false
*
* @param {String|Array} types...
* @return {String|false|null}
* @public
*/
req.is = function is(types) {
var arr = types;
// support flattened arguments
if (!Array.isArray(types)) {
arr = new Array(arguments.length);
for (var i = 0; i < arr.length; i++) {
arr[i] = arguments[i];
}
}
return typeis(this, arr);
};
/**
* Return the protocol string "http" or "https"
* when requested with TLS. When the "trust proxy"
* setting trusts the socket address, the
* "X-Forwarded-Proto" header field will be trusted
* and used if present.
*
* If you're running behind a reverse proxy that
* supplies https for you this may be enabled.
*
* @return {String}
* @public
*/
defineGetter(req, 'protocol', function protocol(){
var proto = this.connection.encrypted
? 'https'
: 'http';
var trust = this.app.get('trust proxy fn');
if (!trust(this.connection.remoteAddress, 0)) {
return proto;
}
// Note: X-Forwarded-Proto is normally only ever a
// single value, but this is to be safe.
var header = this.get('X-Forwarded-Proto') || proto
var index = header.indexOf(',')
return index !== -1
? header.substring(0, index).trim()
: header.trim()
});
/**
* Short-hand for:
*
* req.protocol === 'https'
*
* @return {Boolean}
* @public
*/
defineGetter(req, 'secure', function secure(){
return this.protocol === 'https';
});
/**
* Return the remote address from the trusted proxy.
*
* The is the remote address on the socket unless
* "trust proxy" is set.
*
* @return {String}
* @public
*/
defineGetter(req, 'ip', function ip(){
var trust = this.app.get('trust proxy fn');
return proxyaddr(this, trust);
});
/**
* When "trust proxy" is set, trusted proxy addresses + client.
*
* For example if the value were "client, proxy1, proxy2"
* you would receive the array `["client", "proxy1", "proxy2"]`
* where "proxy2" is the furthest down-stream and "proxy1" and
* "proxy2" were trusted.
*
* @return {Array}
* @public
*/
defineGetter(req, 'ips', function ips() {
var trust = this.app.get('trust proxy fn');
var addrs = proxyaddr.all(this, trust);
// reverse the order (to farthest -> closest)
// and remove socket address
addrs.reverse().pop()
return addrs
});
/**
* Return subdomains as an array.
*
* Subdomains are the dot-separated parts of the host before the main domain of
* the app. By default, the domain of the app is assumed to be the last two
* parts of the host. This can be changed by setting "subdomain offset".
*
* For example, if the domain is "tobi.ferrets.example.com":
* If "subdomain offset" is not set, req.subdomains is `["ferrets", "tobi"]`.
* If "subdomain offset" is 3, req.subdomains is `["tobi"]`.
*
* @return {Array}
* @public
*/
defineGetter(req, 'subdomains', function subdomains() {
var hostname = this.hostname;
if (!hostname) return [];
var offset = this.app.get('subdomain offset');
var subdomains = !isIP(hostname)
? hostname.split('.').reverse()
: [hostname];
return subdomains.slice(offset);
});
/**
* Short-hand for `url.parse(req.url).pathname`.
*
* @return {String}
* @public
*/
defineGetter(req, 'path', function path() {
return parse(this).pathname;
});
/**
* Parse the "Host" header field to a hostname.
*
* When the "trust proxy" setting trusts the socket
* address, the "X-Forwarded-Host" header field will
* be trusted.
*
* @return {String}
* @public
*/
defineGetter(req, 'hostname', function hostname(){
var trust = this.app.get('trust proxy fn');
var host = this.get('X-Forwarded-Host');
if (!host || !trust(this.connection.remoteAddress, 0)) {
host = this.get('Host');
} else if (host.indexOf(',') !== -1) {
// Note: X-Forwarded-Host is normally only ever a
// single value, but this is to be safe.
host = host.substring(0, host.indexOf(',')).trimRight()
}
if (!host) return;
// IPv6 literal support
var offset = host[0] === '['
? host.indexOf(']') + 1
: 0;
var index = host.indexOf(':', offset);
return index !== -1
? host.substring(0, index)
: host;
});
// TODO: change req.host to return host in next major
defineGetter(req, 'host', deprecate.function(function host(){
return this.hostname;
}, 'req.host: Use req.hostname instead'));
/**
* Check if the request is fresh, aka
* Last-Modified and/or the ETag
* still match.
*
* @return {Boolean}
* @public
*/
defineGetter(req, 'fresh', function(){
var method = this.method;
var res = this.res
var status = res.statusCode
// GET or HEAD for weak freshness validation only
if ('GET' !== method && 'HEAD' !== method) return false;
// 2xx or 304 as per rfc2616 14.26
if ((status >= 200 && status < 300) || 304 === status) {
return fresh(this.headers, {
'etag': res.get('ETag'),
'last-modified': res.get('Last-Modified')
})
}
return false;
});
/**
* Check if the request is stale, aka
* "Last-Modified" and / or the "ETag" for the
* resource has changed.
*
* @return {Boolean}
* @public
*/
defineGetter(req, 'stale', function stale(){
return !this.fresh;
});
/**
* Check if the request was an _XMLHttpRequest_.
*
* @return {Boolean}
* @public
*/
defineGetter(req, 'xhr', function xhr(){
var val = this.get('X-Requested-With') || '';
return val.toLowerCase() === 'xmlhttprequest';
});
/**
* Helper function for creating a getter on an object.
*
* @param {Object} obj
* @param {String} name
* @param {Function} getter
* @private
*/
function defineGetter(obj, name, getter) {
Object.defineProperty(obj, name, {
configurable: true,
enumerable: true,
get: getter
});
}

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @private
*/
var Route = require('./route');
var Layer = require('./layer');
var methods = require('methods');
var mixin = require('utils-merge');
var debug = require('debug')('express:router');
var deprecate = require('depd')('express');
var flatten = require('array-flatten');
var parseUrl = require('parseurl');
var setPrototypeOf = require('setprototypeof')
/**
* Module variables.
* @private
*/
var objectRegExp = /^\[object (\S+)\]$/;
var slice = Array.prototype.slice;
var toString = Object.prototype.toString;
/**
* Initialize a new `Router` with the given `options`.
*
* @param {Object} [options]
* @return {Router} which is an callable function
* @public
*/
var proto = module.exports = function(options) {
var opts = options || {};
function router(req, res, next) {
router.handle(req, res, next);
}
// mixin Router class functions
setPrototypeOf(router, proto)
router.params = {};
router._params = [];
router.caseSensitive = opts.caseSensitive;
router.mergeParams = opts.mergeParams;
router.strict = opts.strict;
router.stack = [];
return router;
};
/**
* Map the given param placeholder `name`(s) to the given callback.
*
* Parameter mapping is used to provide pre-conditions to routes
* which use normalized placeholders. For example a _:user_id_ parameter
* could automatically load a user's information from the database without
* any additional code,
*
* The callback uses the same signature as middleware, the only difference
* being that the value of the placeholder is passed, in this case the _id_
* of the user. Once the `next()` function is invoked, just like middleware
* it will continue on to execute the route, or subsequent parameter functions.
*
* Just like in middleware, you must either respond to the request or call next
* to avoid stalling the request.
*
* app.param('user_id', function(req, res, next, id){
* User.find(id, function(err, user){
* if (err) {
* return next(err);
* } else if (!user) {
* return next(new Error('failed to load user'));
* }
* req.user = user;
* next();
* });
* });
*
* @param {String} name
* @param {Function} fn
* @return {app} for chaining
* @public
*/
proto.param = function param(name, fn) {
// param logic
if (typeof name === 'function') {
deprecate('router.param(fn): Refactor to use path params');
this._params.push(name);
return;
}
// apply param functions
var params = this._params;
var len = params.length;
var ret;
if (name[0] === ':') {
deprecate('router.param(' + JSON.stringify(name) + ', fn): Use router.param(' + JSON.stringify(name.substr(1)) + ', fn) instead');
name = name.substr(1);
}
for (var i = 0; i < len; ++i) {
if (ret = params[i](name, fn)) {
fn = ret;
}
}
// ensure we end up with a
// middleware function
if ('function' !== typeof fn) {
throw new Error('invalid param() call for ' + name + ', got ' + fn);
}
(this.params[name] = this.params[name] || []).push(fn);
return this;
};
/**
* Dispatch a req, res into the router.
* @private
*/
proto.handle = function handle(req, res, out) {
var self = this;
debug('dispatching %s %s', req.method, req.url);
var idx = 0;
var protohost = getProtohost(req.url) || ''
var removed = '';
var slashAdded = false;
var paramcalled = {};
// store options for OPTIONS request
// only used if OPTIONS request
var options = [];
// middleware and routes
var stack = self.stack;
// manage inter-router variables
var parentParams = req.params;
var parentUrl = req.baseUrl || '';
var done = restore(out, req, 'baseUrl', 'next', 'params');
// setup next layer
req.next = next;
// for options requests, respond with a default if nothing else responds
if (req.method === 'OPTIONS') {
done = wrap(done, function(old, err) {
if (err || options.length === 0) return old(err);
sendOptionsResponse(res, options, old);
});
}
// setup basic req values
req.baseUrl = parentUrl;
req.originalUrl = req.originalUrl || req.url;
next();
function next(err) {
var layerError = err === 'route'
? null
: err;
// remove added slash
if (slashAdded) {
req.url = req.url.substr(1);
slashAdded = false;
}
// restore altered req.url
if (removed.length !== 0) {
req.baseUrl = parentUrl;
req.url = protohost + removed + req.url.substr(protohost.length);
removed = '';
}
// signal to exit router
if (layerError === 'router') {
setImmediate(done, null)
return
}
// no more matching layers
if (idx >= stack.length) {
setImmediate(done, layerError);
return;
}
// get pathname of request
var path = getPathname(req);
if (path == null) {
return done(layerError);
}
// find next matching layer
var layer;
var match;
var route;
while (match !== true && idx < stack.length) {
layer = stack[idx++];
match = matchLayer(layer, path);
route = layer.route;
if (typeof match !== 'boolean') {
// hold on to layerError
layerError = layerError || match;
}
if (match !== true) {
continue;
}
if (!route) {
// process non-route handlers normally
continue;
}
if (layerError) {
// routes do not match with a pending error
match = false;
continue;
}
var method = req.method;
var has_method = route._handles_method(method);
// build up automatic options response
if (!has_method && method === 'OPTIONS') {
appendMethods(options, route._options());
}
// don't even bother matching route
if (!has_method && method !== 'HEAD') {
match = false;
continue;
}
}
// no match
if (match !== true) {
return done(layerError);
}
// store route for dispatch on change
if (route) {
req.route = route;
}
// Capture one-time layer values
req.params = self.mergeParams
? mergeParams(layer.params, parentParams)
: layer.params;
var layerPath = layer.path;
// this should be done for the layer
self.process_params(layer, paramcalled, req, res, function (err) {
if (err) {
return next(layerError || err);
}
if (route) {
return layer.handle_request(req, res, next);
}
trim_prefix(layer, layerError, layerPath, path);
});
}
function trim_prefix(layer, layerError, layerPath, path) {
if (layerPath.length !== 0) {
// Validate path breaks on a path separator
var c = path[layerPath.length]
if (c && c !== '/' && c !== '.') return next(layerError)
// Trim off the part of the url that matches the route
// middleware (.use stuff) needs to have the path stripped
debug('trim prefix (%s) from url %s', layerPath, req.url);
removed = layerPath;
req.url = protohost + req.url.substr(protohost.length + removed.length);
// Ensure leading slash
if (!protohost && req.url[0] !== '/') {
req.url = '/' + req.url;
slashAdded = true;
}
// Setup base URL (no trailing slash)
req.baseUrl = parentUrl + (removed[removed.length - 1] === '/'
? removed.substring(0, removed.length - 1)
: removed);
}
debug('%s %s : %s', layer.name, layerPath, req.originalUrl);
if (layerError) {
layer.handle_error(layerError, req, res, next);
} else {
layer.handle_request(req, res, next);
}
}
};
/**
* Process any parameters for the layer.
* @private
*/
proto.process_params = function process_params(layer, called, req, res, done) {
var params = this.params;
// captured parameters from the layer, keys and values
var keys = layer.keys;
// fast track
if (!keys || keys.length === 0) {
return done();
}
var i = 0;
var name;
var paramIndex = 0;
var key;
var paramVal;
var paramCallbacks;
var paramCalled;
// process params in order
// param callbacks can be async
function param(err) {
if (err) {
return done(err);
}
if (i >= keys.length ) {
return done();
}
paramIndex = 0;
key = keys[i++];
name = key.name;
paramVal = req.params[name];
paramCallbacks = params[name];
paramCalled = called[name];
if (paramVal === undefined || !paramCallbacks) {
return param();
}
// param previously called with same value or error occurred
if (paramCalled && (paramCalled.match === paramVal
|| (paramCalled.error && paramCalled.error !== 'route'))) {
// restore value
req.params[name] = paramCalled.value;
// next param
return param(paramCalled.error);
}
called[name] = paramCalled = {
error: null,
match: paramVal,
value: paramVal
};
paramCallback();
}
// single param callbacks
function paramCallback(err) {
var fn = paramCallbacks[paramIndex++];
// store updated value
paramCalled.value = req.params[key.name];
if (err) {
// store error
paramCalled.error = err;
param(err);
return;
}
if (!fn) return param();
try {
fn(req, res, paramCallback, paramVal, key.name);
} catch (e) {
paramCallback(e);
}
}
param();
};
/**
* Use the given middleware function, with optional path, defaulting to "/".
*
* Use (like `.all`) will run for any http METHOD, but it will not add
* handlers for those methods so OPTIONS requests will not consider `.use`
* functions even if they could respond.
*
* The other difference is that _route_ path is stripped and not visible
* to the handler function. The main effect of this feature is that mounted
* handlers can operate without any code changes regardless of the "prefix"
* pathname.
*
* @public
*/
proto.use = function use(fn) {
var offset = 0;
var path = '/';
// default path to '/'
// disambiguate router.use([fn])
if (typeof fn !== 'function') {
var arg = fn;
while (Array.isArray(arg) && arg.length !== 0) {
arg = arg[0];
}
// first arg is the path
if (typeof arg !== 'function') {
offset = 1;
path = fn;
}
}
var callbacks = flatten(slice.call(arguments, offset));
if (callbacks.length === 0) {
throw new TypeError('Router.use() requires a middleware function')
}
for (var i = 0; i < callbacks.length; i++) {
var fn = callbacks[i];
if (typeof fn !== 'function') {
throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))
}
// add the middleware
debug('use %o %s', path, fn.name || '<anonymous>')
var layer = new Layer(path, {
sensitive: this.caseSensitive,
strict: false,
end: false
}, fn);
layer.route = undefined;
this.stack.push(layer);
}
return this;
};
/**
* Create a new Route for the given path.
*
* Each route contains a separate middleware stack and VERB handlers.
*
* See the Route api documentation for details on adding handlers
* and middleware to routes.
*
* @param {String} path
* @return {Route}
* @public
*/
proto.route = function route(path) {
var route = new Route(path);
var layer = new Layer(path, {
sensitive: this.caseSensitive,
strict: this.strict,
end: true
}, route.dispatch.bind(route));
layer.route = route;
this.stack.push(layer);
return route;
};
// create Router#VERB functions
methods.concat('all').forEach(function(method){
proto[method] = function(path){
var route = this.route(path)
route[method].apply(route, slice.call(arguments, 1));
return this;
};
});
// append methods to a list of methods
function appendMethods(list, addition) {
for (var i = 0; i < addition.length; i++) {
var method = addition[i];
if (list.indexOf(method) === -1) {
list.push(method);
}
}
}
// get pathname of request
function getPathname(req) {
try {
return parseUrl(req).pathname;
} catch (err) {
return undefined;
}
}
// Get get protocol + host for a URL
function getProtohost(url) {
if (typeof url !== 'string' || url.length === 0 || url[0] === '/') {
return undefined
}
var searchIndex = url.indexOf('?')
var pathLength = searchIndex !== -1
? searchIndex
: url.length
var fqdnIndex = url.substr(0, pathLength).indexOf('://')
return fqdnIndex !== -1
? url.substr(0, url.indexOf('/', 3 + fqdnIndex))
: undefined
}
// get type for error message
function gettype(obj) {
var type = typeof obj;
if (type !== 'object') {
return type;
}
// inspect [[Class]] for objects
return toString.call(obj)
.replace(objectRegExp, '$1');
}
/**
* Match path to a layer.
*
* @param {Layer} layer
* @param {string} path
* @private
*/
function matchLayer(layer, path) {
try {
return layer.match(path);
} catch (err) {
return err;
}
}
// merge params with parent params
function mergeParams(params, parent) {
if (typeof parent !== 'object' || !parent) {
return params;
}
// make copy of parent for base
var obj = mixin({}, parent);
// simple non-numeric merging
if (!(0 in params) || !(0 in parent)) {
return mixin(obj, params);
}
var i = 0;
var o = 0;
// determine numeric gaps
while (i in params) {
i++;
}
while (o in parent) {
o++;
}
// offset numeric indices in params before merge
for (i--; i >= 0; i--) {
params[i + o] = params[i];
// create holes for the merge when necessary
if (i < o) {
delete params[i];
}
}
return mixin(obj, params);
}
// restore obj props after function
function restore(fn, obj) {
var props = new Array(arguments.length - 2);
var vals = new Array(arguments.length - 2);
for (var i = 0; i < props.length; i++) {
props[i] = arguments[i + 2];
vals[i] = obj[props[i]];
}
return function () {
// restore vals
for (var i = 0; i < props.length; i++) {
obj[props[i]] = vals[i];
}
return fn.apply(this, arguments);
};
}
// send an OPTIONS response
function sendOptionsResponse(res, options, next) {
try {
var body = options.join(',');
res.set('Allow', body);
res.send(body);
} catch (err) {
next(err);
}
}
// wrap a function
function wrap(old, fn) {
return function proxy() {
var args = new Array(arguments.length + 1);
args[0] = old;
for (var i = 0, len = arguments.length; i < len; i++) {
args[i + 1] = arguments[i];
}
fn.apply(this, args);
};
}

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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @private
*/
var pathRegexp = require('path-to-regexp');
var debug = require('debug')('express:router:layer');
/**
* Module variables.
* @private
*/
var hasOwnProperty = Object.prototype.hasOwnProperty;
/**
* Module exports.
* @public
*/
module.exports = Layer;
function Layer(path, options, fn) {
if (!(this instanceof Layer)) {
return new Layer(path, options, fn);
}
debug('new %o', path)
var opts = options || {};
this.handle = fn;
this.name = fn.name || '<anonymous>';
this.params = undefined;
this.path = undefined;
this.regexp = pathRegexp(path, this.keys = [], opts);
// set fast path flags
this.regexp.fast_star = path === '*'
this.regexp.fast_slash = path === '/' && opts.end === false
}
/**
* Handle the error for the layer.
*
* @param {Error} error
* @param {Request} req
* @param {Response} res
* @param {function} next
* @api private
*/
Layer.prototype.handle_error = function handle_error(error, req, res, next) {
var fn = this.handle;
if (fn.length !== 4) {
// not a standard error handler
return next(error);
}
try {
fn(error, req, res, next);
} catch (err) {
next(err);
}
};
/**
* Handle the request for the layer.
*
* @param {Request} req
* @param {Response} res
* @param {function} next
* @api private
*/
Layer.prototype.handle_request = function handle(req, res, next) {
var fn = this.handle;
if (fn.length > 3) {
// not a standard request handler
return next();
}
try {
fn(req, res, next);
} catch (err) {
next(err);
}
};
/**
* Check if this route matches `path`, if so
* populate `.params`.
*
* @param {String} path
* @return {Boolean}
* @api private
*/
Layer.prototype.match = function match(path) {
var match
if (path != null) {
// fast path non-ending match for / (any path matches)
if (this.regexp.fast_slash) {
this.params = {}
this.path = ''
return true
}
// fast path for * (everything matched in a param)
if (this.regexp.fast_star) {
this.params = {'0': decode_param(path)}
this.path = path
return true
}
// match the path
match = this.regexp.exec(path)
}
if (!match) {
this.params = undefined;
this.path = undefined;
return false;
}
// store values
this.params = {};
this.path = match[0]
var keys = this.keys;
var params = this.params;
for (var i = 1; i < match.length; i++) {
var key = keys[i - 1];
var prop = key.name;
var val = decode_param(match[i])
if (val !== undefined || !(hasOwnProperty.call(params, prop))) {
params[prop] = val;
}
}
return true;
};
/**
* Decode param value.
*
* @param {string} val
* @return {string}
* @private
*/
function decode_param(val) {
if (typeof val !== 'string' || val.length === 0) {
return val;
}
try {
return decodeURIComponent(val);
} catch (err) {
if (err instanceof URIError) {
err.message = 'Failed to decode param \'' + val + '\'';
err.status = err.statusCode = 400;
}
throw err;
}
}

216
node_modules/express/lib/router/route.js generated vendored Normal file
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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @private
*/
var debug = require('debug')('express:router:route');
var flatten = require('array-flatten');
var Layer = require('./layer');
var methods = require('methods');
/**
* Module variables.
* @private
*/
var slice = Array.prototype.slice;
var toString = Object.prototype.toString;
/**
* Module exports.
* @public
*/
module.exports = Route;
/**
* Initialize `Route` with the given `path`,
*
* @param {String} path
* @public
*/
function Route(path) {
this.path = path;
this.stack = [];
debug('new %o', path)
// route handlers for various http methods
this.methods = {};
}
/**
* Determine if the route handles a given method.
* @private
*/
Route.prototype._handles_method = function _handles_method(method) {
if (this.methods._all) {
return true;
}
var name = method.toLowerCase();
if (name === 'head' && !this.methods['head']) {
name = 'get';
}
return Boolean(this.methods[name]);
};
/**
* @return {Array} supported HTTP methods
* @private
*/
Route.prototype._options = function _options() {
var methods = Object.keys(this.methods);
// append automatic head
if (this.methods.get && !this.methods.head) {
methods.push('head');
}
for (var i = 0; i < methods.length; i++) {
// make upper case
methods[i] = methods[i].toUpperCase();
}
return methods;
};
/**
* dispatch req, res into this route
* @private
*/
Route.prototype.dispatch = function dispatch(req, res, done) {
var idx = 0;
var stack = this.stack;
if (stack.length === 0) {
return done();
}
var method = req.method.toLowerCase();
if (method === 'head' && !this.methods['head']) {
method = 'get';
}
req.route = this;
next();
function next(err) {
// signal to exit route
if (err && err === 'route') {
return done();
}
// signal to exit router
if (err && err === 'router') {
return done(err)
}
var layer = stack[idx++];
if (!layer) {
return done(err);
}
if (layer.method && layer.method !== method) {
return next(err);
}
if (err) {
layer.handle_error(err, req, res, next);
} else {
layer.handle_request(req, res, next);
}
}
};
/**
* Add a handler for all HTTP verbs to this route.
*
* Behaves just like middleware and can respond or call `next`
* to continue processing.
*
* You can use multiple `.all` call to add multiple handlers.
*
* function check_something(req, res, next){
* next();
* };
*
* function validate_user(req, res, next){
* next();
* };
*
* route
* .all(validate_user)
* .all(check_something)
* .get(function(req, res, next){
* res.send('hello world');
* });
*
* @param {function} handler
* @return {Route} for chaining
* @api public
*/
Route.prototype.all = function all() {
var handles = flatten(slice.call(arguments));
for (var i = 0; i < handles.length; i++) {
var handle = handles[i];
if (typeof handle !== 'function') {
var type = toString.call(handle);
var msg = 'Route.all() requires a callback function but got a ' + type
throw new TypeError(msg);
}
var layer = Layer('/', {}, handle);
layer.method = undefined;
this.methods._all = true;
this.stack.push(layer);
}
return this;
};
methods.forEach(function(method){
Route.prototype[method] = function(){
var handles = flatten(slice.call(arguments));
for (var i = 0; i < handles.length; i++) {
var handle = handles[i];
if (typeof handle !== 'function') {
var type = toString.call(handle);
var msg = 'Route.' + method + '() requires a callback function but got a ' + type
throw new Error(msg);
}
debug('%s %o', method, this.path)
var layer = Layer('/', {}, handle);
layer.method = method;
this.methods[method] = true;
this.stack.push(layer);
}
return this;
};
});

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node_modules/express/lib/utils.js generated vendored Normal file
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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @api private
*/
var Buffer = require('safe-buffer').Buffer
var contentDisposition = require('content-disposition');
var contentType = require('content-type');
var deprecate = require('depd')('express');
var flatten = require('array-flatten');
var mime = require('send').mime;
var etag = require('etag');
var proxyaddr = require('proxy-addr');
var qs = require('qs');
var querystring = require('querystring');
/**
* Return strong ETag for `body`.
*
* @param {String|Buffer} body
* @param {String} [encoding]
* @return {String}
* @api private
*/
exports.etag = createETagGenerator({ weak: false })
/**
* Return weak ETag for `body`.
*
* @param {String|Buffer} body
* @param {String} [encoding]
* @return {String}
* @api private
*/
exports.wetag = createETagGenerator({ weak: true })
/**
* Check if `path` looks absolute.
*
* @param {String} path
* @return {Boolean}
* @api private
*/
exports.isAbsolute = function(path){
if ('/' === path[0]) return true;
if (':' === path[1] && ('\\' === path[2] || '/' === path[2])) return true; // Windows device path
if ('\\\\' === path.substring(0, 2)) return true; // Microsoft Azure absolute path
};
/**
* Flatten the given `arr`.
*
* @param {Array} arr
* @return {Array}
* @api private
*/
exports.flatten = deprecate.function(flatten,
'utils.flatten: use array-flatten npm module instead');
/**
* Normalize the given `type`, for example "html" becomes "text/html".
*
* @param {String} type
* @return {Object}
* @api private
*/
exports.normalizeType = function(type){
return ~type.indexOf('/')
? acceptParams(type)
: { value: mime.lookup(type), params: {} };
};
/**
* Normalize `types`, for example "html" becomes "text/html".
*
* @param {Array} types
* @return {Array}
* @api private
*/
exports.normalizeTypes = function(types){
var ret = [];
for (var i = 0; i < types.length; ++i) {
ret.push(exports.normalizeType(types[i]));
}
return ret;
};
/**
* Generate Content-Disposition header appropriate for the filename.
* non-ascii filenames are urlencoded and a filename* parameter is added
*
* @param {String} filename
* @return {String}
* @api private
*/
exports.contentDisposition = deprecate.function(contentDisposition,
'utils.contentDisposition: use content-disposition npm module instead');
/**
* Parse accept params `str` returning an
* object with `.value`, `.quality` and `.params`.
* also includes `.originalIndex` for stable sorting
*
* @param {String} str
* @return {Object}
* @api private
*/
function acceptParams(str, index) {
var parts = str.split(/ *; */);
var ret = { value: parts[0], quality: 1, params: {}, originalIndex: index };
for (var i = 1; i < parts.length; ++i) {
var pms = parts[i].split(/ *= */);
if ('q' === pms[0]) {
ret.quality = parseFloat(pms[1]);
} else {
ret.params[pms[0]] = pms[1];
}
}
return ret;
}
/**
* Compile "etag" value to function.
*
* @param {Boolean|String|Function} val
* @return {Function}
* @api private
*/
exports.compileETag = function(val) {
var fn;
if (typeof val === 'function') {
return val;
}
switch (val) {
case true:
fn = exports.wetag;
break;
case false:
break;
case 'strong':
fn = exports.etag;
break;
case 'weak':
fn = exports.wetag;
break;
default:
throw new TypeError('unknown value for etag function: ' + val);
}
return fn;
}
/**
* Compile "query parser" value to function.
*
* @param {String|Function} val
* @return {Function}
* @api private
*/
exports.compileQueryParser = function compileQueryParser(val) {
var fn;
if (typeof val === 'function') {
return val;
}
switch (val) {
case true:
fn = querystring.parse;
break;
case false:
fn = newObject;
break;
case 'extended':
fn = parseExtendedQueryString;
break;
case 'simple':
fn = querystring.parse;
break;
default:
throw new TypeError('unknown value for query parser function: ' + val);
}
return fn;
}
/**
* Compile "proxy trust" value to function.
*
* @param {Boolean|String|Number|Array|Function} val
* @return {Function}
* @api private
*/
exports.compileTrust = function(val) {
if (typeof val === 'function') return val;
if (val === true) {
// Support plain true/false
return function(){ return true };
}
if (typeof val === 'number') {
// Support trusting hop count
return function(a, i){ return i < val };
}
if (typeof val === 'string') {
// Support comma-separated values
val = val.split(/ *, */);
}
return proxyaddr.compile(val || []);
}
/**
* Set the charset in a given Content-Type string.
*
* @param {String} type
* @param {String} charset
* @return {String}
* @api private
*/
exports.setCharset = function setCharset(type, charset) {
if (!type || !charset) {
return type;
}
// parse type
var parsed = contentType.parse(type);
// set charset
parsed.parameters.charset = charset;
// format type
return contentType.format(parsed);
};
/**
* Create an ETag generator function, generating ETags with
* the given options.
*
* @param {object} options
* @return {function}
* @private
*/
function createETagGenerator (options) {
return function generateETag (body, encoding) {
var buf = !Buffer.isBuffer(body)
? Buffer.from(body, encoding)
: body
return etag(buf, options)
}
}
/**
* Parse an extended query string with qs.
*
* @return {Object}
* @private
*/
function parseExtendedQueryString(str) {
return qs.parse(str, {
allowPrototypes: true
});
}
/**
* Return new empty object.
*
* @return {Object}
* @api private
*/
function newObject() {
return {};
}

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node_modules/express/lib/view.js generated vendored Normal file
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/*!
* express
* Copyright(c) 2009-2013 TJ Holowaychuk
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict';
/**
* Module dependencies.
* @private
*/
var debug = require('debug')('express:view');
var path = require('path');
var fs = require('fs');
/**
* Module variables.
* @private
*/
var dirname = path.dirname;
var basename = path.basename;
var extname = path.extname;
var join = path.join;
var resolve = path.resolve;
/**
* Module exports.
* @public
*/
module.exports = View;
/**
* Initialize a new `View` with the given `name`.
*
* Options:
*
* - `defaultEngine` the default template engine name
* - `engines` template engine require() cache
* - `root` root path for view lookup
*
* @param {string} name
* @param {object} options
* @public
*/
function View(name, options) {
var opts = options || {};
this.defaultEngine = opts.defaultEngine;
this.ext = extname(name);
this.name = name;
this.root = opts.root;
if (!this.ext && !this.defaultEngine) {
throw new Error('No default engine was specified and no extension was provided.');
}
var fileName = name;
if (!this.ext) {
// get extension from default engine name
this.ext = this.defaultEngine[0] !== '.'
? '.' + this.defaultEngine
: this.defaultEngine;
fileName += this.ext;
}
if (!opts.engines[this.ext]) {
// load engine
var mod = this.ext.substr(1)
debug('require "%s"', mod)
// default engine export
var fn = require(mod).__express
if (typeof fn !== 'function') {
throw new Error('Module "' + mod + '" does not provide a view engine.')
}
opts.engines[this.ext] = fn
}
// store loaded engine
this.engine = opts.engines[this.ext];
// lookup path
this.path = this.lookup(fileName);
}
/**
* Lookup view by the given `name`
*
* @param {string} name
* @private
*/
View.prototype.lookup = function lookup(name) {
var path;
var roots = [].concat(this.root);
debug('lookup "%s"', name);
for (var i = 0; i < roots.length && !path; i++) {
var root = roots[i];
// resolve the path
var loc = resolve(root, name);
var dir = dirname(loc);
var file = basename(loc);
// resolve the file
path = this.resolve(dir, file);
}
return path;
};
/**
* Render with the given options.
*
* @param {object} options
* @param {function} callback
* @private
*/
View.prototype.render = function render(options, callback) {
debug('render "%s"', this.path);
this.engine(this.path, options, callback);
};
/**
* Resolve the file within the given directory.
*
* @param {string} dir
* @param {string} file
* @private
*/
View.prototype.resolve = function resolve(dir, file) {
var ext = this.ext;
// <path>.<ext>
var path = join(dir, file);
var stat = tryStat(path);
if (stat && stat.isFile()) {
return path;
}
// <path>/index.<ext>
path = join(dir, basename(file, ext), 'index' + ext);
stat = tryStat(path);
if (stat && stat.isFile()) {
return path;
}
};
/**
* Return a stat, maybe.
*
* @param {string} path
* @return {fs.Stats}
* @private
*/
function tryStat(path) {
debug('stat "%s"', path);
try {
return fs.statSync(path);
} catch (e) {
return undefined;
}
}

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{
"_from": "express@^4.17.1",
"_id": "express@4.17.1",
"_inBundle": false,
"_integrity": "sha512-mHJ9O79RqluphRrcw2X/GTh3k9tVv8YcoyY4Kkh4WDMUYKRZUq0h1o0w2rrrxBqM7VoeUVqgb27xlEMXTnYt4g==",
"_location": "/express",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "express@^4.17.1",
"name": "express",
"escapedName": "express",
"rawSpec": "^4.17.1",
"saveSpec": null,
"fetchSpec": "^4.17.1"
},
"_requiredBy": [
"#USER",
"/"
],
"_resolved": "https://registry.npmjs.org/express/-/express-4.17.1.tgz",
"_shasum": "4491fc38605cf51f8629d39c2b5d026f98a4c134",
"_spec": "express@^4.17.1",
"_where": "D:\\Documents\\UniWork\\Year 4\\Semester 2\\SEG3125\\Labs\\Lab 6\\Survey_Analysis",
"author": {
"name": "TJ Holowaychuk",
"email": "tj@vision-media.ca"
},
"bugs": {
"url": "https://github.com/expressjs/express/issues"
},
"bundleDependencies": false,
"contributors": [
{
"name": "Aaron Heckmann",
"email": "aaron.heckmann+github@gmail.com"
},
{
"name": "Ciaran Jessup",
"email": "ciaranj@gmail.com"
},
{
"name": "Douglas Christopher Wilson",
"email": "doug@somethingdoug.com"
},
{
"name": "Guillermo Rauch",
"email": "rauchg@gmail.com"
},
{
"name": "Jonathan Ong",
"email": "me@jongleberry.com"
},
{
"name": "Roman Shtylman",
"email": "shtylman+expressjs@gmail.com"
},
{
"name": "Young Jae Sim",
"email": "hanul@hanul.me"
}
],
"dependencies": {
"accepts": "~1.3.7",
"array-flatten": "1.1.1",
"body-parser": "1.19.0",
"content-disposition": "0.5.3",
"content-type": "~1.0.4",
"cookie": "0.4.0",
"cookie-signature": "1.0.6",
"debug": "2.6.9",
"depd": "~1.1.2",
"encodeurl": "~1.0.2",
"escape-html": "~1.0.3",
"etag": "~1.8.1",
"finalhandler": "~1.1.2",
"fresh": "0.5.2",
"merge-descriptors": "1.0.1",
"methods": "~1.1.2",
"on-finished": "~2.3.0",
"parseurl": "~1.3.3",
"path-to-regexp": "0.1.7",
"proxy-addr": "~2.0.5",
"qs": "6.7.0",
"range-parser": "~1.2.1",
"safe-buffer": "5.1.2",
"send": "0.17.1",
"serve-static": "1.14.1",
"setprototypeof": "1.1.1",
"statuses": "~1.5.0",
"type-is": "~1.6.18",
"utils-merge": "1.0.1",
"vary": "~1.1.2"
},
"deprecated": false,
"description": "Fast, unopinionated, minimalist web framework",
"devDependencies": {
"after": "0.8.2",
"connect-redis": "3.4.1",
"cookie-parser": "~1.4.4",
"cookie-session": "1.3.3",
"ejs": "2.6.1",
"eslint": "2.13.1",
"express-session": "1.16.1",
"hbs": "4.0.4",
"istanbul": "0.4.5",
"marked": "0.6.2",
"method-override": "3.0.0",
"mocha": "5.2.0",
"morgan": "1.9.1",
"multiparty": "4.2.1",
"pbkdf2-password": "1.2.1",
"should": "13.2.3",
"supertest": "3.3.0",
"vhost": "~3.0.2"
},
"engines": {
"node": ">= 0.10.0"
},
"files": [
"LICENSE",
"History.md",
"Readme.md",
"index.js",
"lib/"
],
"homepage": "http://expressjs.com/",
"keywords": [
"express",
"framework",
"sinatra",
"web",
"rest",
"restful",
"router",
"app",
"api"
],
"license": "MIT",
"name": "express",
"repository": {
"type": "git",
"url": "git+https://github.com/expressjs/express.git"
},
"scripts": {
"lint": "eslint .",
"test": "mocha --require test/support/env --reporter spec --bail --check-leaks test/ test/acceptance/",
"test-ci": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --require test/support/env --reporter spec --check-leaks test/ test/acceptance/",
"test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --require test/support/env --reporter dot --check-leaks test/ test/acceptance/",
"test-tap": "mocha --require test/support/env --reporter tap --check-leaks test/ test/acceptance/"
},
"version": "4.17.1"
}