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Allow custom proxies in development (#1790)
* Change proxy handling to allow multiple proxies to be specified in package.json. * Up webpack-dev-server to 2.4.2 Webpack Dev Server version 2.4.2 handles the external websocket upgrade for all proxies * Fix the listen() call * Switch to correct default host * Remove promises and extract to react-dev-utils * oops
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,185 @@ | ||
| // @remove-on-eject-begin | ||
| /** | ||
| * Copyright (c) 2015-present, Facebook, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This source code is licensed under the BSD-style license found in the | ||
| * LICENSE file in the root directory of this source tree. An additional grant | ||
| * of patent rights can be found in the PATENTS file in the same directory. | ||
| */ | ||
| // @remove-on-eject-end | ||
| 'use strict'; | ||
|
|
||
| const address = require('address'); | ||
| const chalk = require('chalk'); | ||
| const url = require('url'); | ||
|
|
||
| function resolveLoopback(proxy) { | ||
| const o = url.parse(proxy); | ||
| o.host = undefined; | ||
| if (o.hostname !== 'localhost') { | ||
| return proxy; | ||
| } | ||
| try { | ||
| o.hostname = address.ipv6() ? '::1' : '127.0.0.1'; | ||
| } catch (_ignored) { | ||
| o.hostname = '127.0.0.1'; | ||
| } | ||
| return url.format(o); | ||
| } | ||
|
|
||
| // We need to provide a custom onError function for httpProxyMiddleware. | ||
| // It allows us to log custom error messages on the console. | ||
| function onProxyError(proxy) { | ||
| return (err, req, res) => { | ||
| const host = req.headers && req.headers.host; | ||
| console.log( | ||
| chalk.red('Proxy error:') + | ||
| ' Could not proxy request ' + | ||
| chalk.cyan(req.url) + | ||
| ' from ' + | ||
| chalk.cyan(host) + | ||
| ' to ' + | ||
| chalk.cyan(proxy) + | ||
| '.' | ||
| ); | ||
| console.log( | ||
| 'See https://nodejs.org/api/errors.html#errors_common_system_errors for more information (' + | ||
| chalk.cyan(err.code) + | ||
| ').' | ||
| ); | ||
| console.log(); | ||
|
|
||
| // And immediately send the proper error response to the client. | ||
| // Otherwise, the request will eventually timeout with ERR_EMPTY_RESPONSE on the client side. | ||
| if (res.writeHead && !res.headersSent) { | ||
| res.writeHead(500); | ||
| } | ||
| res.end( | ||
| 'Proxy error: Could not proxy request ' + | ||
| req.url + | ||
| ' from ' + | ||
| host + | ||
| ' to ' + | ||
| proxy + | ||
| ' (' + | ||
| err.code + | ||
| ').' | ||
| ); | ||
| }; | ||
| } | ||
|
|
||
| module.exports = function prepareProxy(proxy) { | ||
| // `proxy` lets you specify alternate servers for specific requests. | ||
| // It can either be a string or an object conforming to the Webpack dev server proxy configuration | ||
| // https://webpack.github.io/docs/webpack-dev-server.html | ||
| if (!proxy) return undefined; | ||
| if (typeof proxy !== 'object' && typeof proxy !== 'string') { | ||
| console.log( | ||
| chalk.red( | ||
| 'When specified, "proxy" in package.json must be a string or an object.' | ||
| ) | ||
| ); | ||
| console.log( | ||
| chalk.red('Instead, the type of "proxy" was "' + typeof proxy + '".') | ||
| ); | ||
| console.log( | ||
| chalk.red( | ||
| 'Either remove "proxy" from package.json, or make it an object.' | ||
| ) | ||
| ); | ||
| process.exit(1); | ||
| } | ||
|
|
||
| // Otherwise, if proxy is specified, we will let it handle any request. | ||
| // There are a few exceptions which we won't send to the proxy: | ||
| // - /index.html (served as HTML5 history API fallback) | ||
| // - /*.hot-update.json (WebpackDevServer uses this too for hot reloading) | ||
| // - /sockjs-node/* (WebpackDevServer uses this for hot reloading) | ||
| // Tip: use https://jex.im/regulex/ to visualize the regex | ||
| const mayProxy = /^(?!\/(index\.html$|.*\.hot-update\.json$|sockjs-node\/)).*$/; | ||
|
|
||
| // Support proxy as a string for those who are using the simple proxy option | ||
| if (typeof proxy === 'string') { | ||
| if (!/^http(s)?:\/\//.test(proxy)) { | ||
| console.log( | ||
| chalk.red( | ||
| 'When "proxy" is specified in package.json it must start with either http:// or https://' | ||
| ) | ||
| ); | ||
| process.exit(1); | ||
| } | ||
|
|
||
| let target; | ||
| if (process.platform === 'win32') { | ||
| target = resolveLoopback(proxy); | ||
| } else { | ||
| target = proxy; | ||
| } | ||
| return [ | ||
| { | ||
| target, | ||
| logLevel: 'silent', | ||
| // For single page apps, we generally want to fallback to /index.html. | ||
| // However we also want to respect `proxy` for API calls. | ||
| // So if `proxy` is specified as a string, we need to decide which fallback to use. | ||
| // We use a heuristic: if request `accept`s text/html, we pick /index.html. | ||
| // Modern browsers include text/html into `accept` header when navigating. | ||
| // However API calls like `fetch()` won’t generally accept text/html. | ||
| // If this heuristic doesn’t work well for you, use a custom `proxy` object. | ||
| context: function(pathname, req) { | ||
| return mayProxy.test(pathname) && | ||
| req.headers.accept && | ||
| req.headers.accept.indexOf('text/html') === -1; | ||
| }, | ||
| onProxyReq: proxyReq => { | ||
| // Browers may send Origin headers even with same-origin | ||
| // requests. To prevent CORS issues, we have to change | ||
| // the Origin to match the target URL. | ||
| if (proxyReq.getHeader('origin')) { | ||
| proxyReq.setHeader('origin', target); | ||
| } | ||
| }, | ||
| onError: onProxyError(target), | ||
| secure: false, | ||
| changeOrigin: true, | ||
| ws: true, | ||
| xfwd: true, | ||
| }, | ||
| ]; | ||
| } | ||
|
|
||
| // Otherwise, proxy is an object so create an array of proxies to pass to webpackDevServer | ||
| return Object.keys(proxy).map(function(context) { | ||
| if (!proxy[context].hasOwnProperty('target')) { | ||
| console.log( | ||
| chalk.red( | ||
| 'When `proxy` in package.json is as an object, each `context` object must have a ' + | ||
| '`target` property specified as a url string' | ||
| ) | ||
| ); | ||
| process.exit(1); | ||
| } | ||
| let target; | ||
| if (process.platform === 'win32') { | ||
| target = resolveLoopback(proxy[context].target); | ||
| } else { | ||
| target = proxy[context].target; | ||
| } | ||
| return Object.assign({}, proxy[context], { | ||
| context: function(pathname) { | ||
| return mayProxy.test(pathname) && pathname.match(context); | ||
| }, | ||
| onProxyReq: proxyReq => { | ||
| // Browers may send Origin headers even with same-origin | ||
| // requests. To prevent CORS issues, we have to change | ||
| // the Origin to match the target URL. | ||
| if (proxyReq.getHeader('origin')) { | ||
| proxyReq.setHeader('origin', target); | ||
| } | ||
| }, | ||
| target, | ||
| onError: onProxyError(target), | ||
| }); | ||
| }); | ||
| }; |
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