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