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https://github.com/http-party/node-http-proxy.git
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90 lines
2.8 KiB
JavaScript
90 lines
2.8 KiB
JavaScript
/*
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urls-middleware.js: Basic example of middleware in node-http-proxy
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Copyright (c) 2010 Charlie Robbins, Mikeal Rogers, Fedor Indutny, Marak Squires, & Dominic Tarr.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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var util = require('util'),
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colors = require('colors'),
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http = require('http'),
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httpProxy = require('./../lib/node-http-proxy');
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//
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// url proxying middleware example.
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//
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// this is not optimised or tested but shows the basic approch to writing a middleware.
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//
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function matcher (url, dest) {
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var r = new RegExp (url)
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return function (url) {
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var m = r(url)
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if (!m) return
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var path = url.slice(m[0].length)
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console.log('proxy:', url, '->', path)
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return {url: path, dest: dest}
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}
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}
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exports.urls = function (urls) {
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var matchers = []
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for (var url in urls) {
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matchers.push(matcher(url, urls[url]))
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}
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return function (req, res, next) {
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//
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// in nhp middlewares, `proxy` is the prototype of `next`
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// (this means nhp middlewares support both connect API (req, res, next)
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// and nhp API (req, res, proxy)
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//
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var proxy = next;
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for (var k in matchers) {
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var m;
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if (m = matchers[k](req.url)) {
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req.url = m.url;
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return proxy.proxyRequest(req,res, m.dest);
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}
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}
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}
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}
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httpProxy.createServer(
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exports.urls({'/hello': {port: 9000, host: 'localhost'}})
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).listen(8000);
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//
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// Target Http Server
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//
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http.createServer(
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function (req, res) {
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res.writeHead(200, { 'Content-Type': 'text/plain' });
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res.write('request successfully proxied to: ' + req.url + '\n' + JSON.stringify(req.headers, true, 2));
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res.end();
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}).listen(9000);
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util.puts('http proxy server'.blue + ' started '.green.bold + 'on port '.blue + '8000'.yellow);
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util.puts('http server '.blue + 'started '.green.bold + 'on port '.blue + '9000 '.yellow);
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