mirror of
https://github.com/http-party/node-http-proxy.git
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136 lines
3.3 KiB
JavaScript
136 lines
3.3 KiB
JavaScript
var http = require('http'),
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https = require('https'),
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common = require('../common'),
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passes = exports;
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/*!
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* Array of passes.
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*
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* A `pass` is just a function that is executed on `req, socket, options`
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* so that you can easily add new checks while still keeping the base
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* flexible.
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*/
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/*
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* Websockets Passes
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*
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*/
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var passes = exports;
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[
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/**
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* WebSocket requests must have the `GET` method and
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* the `upgrade:websocket` header
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*
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* @param {ClientRequest} Req Request object
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* @param {Socket} Websocket
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*
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* @api private
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*/
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function checkMethodAndHeader (req, socket) {
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if (req.method !== 'GET' || !req.headers.upgrade) {
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socket.destroy();
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return true;
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}
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if (req.headers.upgrade.toLowerCase() !== 'websocket') {
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socket.destroy();
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return true;
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}
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},
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/**
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* Set the proper configuration for sockets,
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* set no delay and set keep alive, also set
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* the timeout to 0.
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*
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* @param {ClientRequest} Req Request object
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* @param {Socket} Websocket
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*
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* @api private
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*/
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function setupSocket(req, socket) {
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socket.setTimeout(0);
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socket.setNoDelay(true);
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socket.setKeepAlive(true, 0);
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},
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/**
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* Sets `x-forwarded-*` headers if specified in config.
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*
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* @param {ClientRequest} Req Request object
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* @param {Socket} Websocket
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* @param {Object} Options Config object passed to the proxy
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*
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* @api private
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*/
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function XHeaders(req, socket, options) {
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if(!options.xfwd) return;
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var values = {
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for : req.connection.remoteAddress || req.socket.remoteAddress,
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port : req.connection.remotePort || req.socket.remotePort,
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proto: req.connection.pair ? 'wss' : 'ws'
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};
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['for', 'port', 'proto'].forEach(function(header) {
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req.headers['x-forwarded-' + header] =
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(req.headers['x-forwarded-' + header] || '') +
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(req.headers['x-forwarded-' + header] ? ',' : '') +
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values[header];
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});
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},
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/**
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* Does the actual proxying. Make the request and upgrade it
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* send the Switching Protocols request and pipe the sockets.
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*
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* @param {ClientRequest} Req Request object
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* @param {Socket} Websocket
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* @param {Object} Options Config object passed to the proxy
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*
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* @api private
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*/
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function stream(req, socket, options, server, head, clb) {
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common.setupSocket(socket);
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if (head && head.length) socket.unshift(head);
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var proxyReq = (~['https:', 'wss:'].indexOf(options.target.protocol) ? https : http).request(
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common.setupOutgoing(options.ssl || {}, options, req)
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);
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// Error Handler
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proxyReq.on('error', function(err){
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if (clb) {
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clb(err);
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} else {
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server.emit('error', err, req, res);
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}
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});
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proxyReq.on('upgrade', function(proxyRes, proxySocket, proxyHead) {
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common.setupSocket(proxySocket);
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if (proxyHead && proxyHead.length) proxySocket.unshift(proxyHead);
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socket.write('HTTP/1.1 101 Switching Protocols\r\n');
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socket.write(Object.keys(proxyRes.headers).map(function(i) {
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return i + ": " + proxyRes.headers[i];
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}).join('\r\n') + '\r\n\r\n');
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proxySocket.pipe(socket).pipe(proxySocket);
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});
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proxyReq.end(); // XXX: CHECK IF THIS IS THIS CORRECT
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}
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] // <--
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.forEach(function(func) {
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passes[func.name] = func;
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});
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