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https://github.com/http-party/node-http-proxy.git
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138 lines
3.5 KiB
JavaScript
138 lines
3.5 KiB
JavaScript
var common = exports,
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url = require('url'),
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extend = require('util')._extend;
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/**
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* Copies the right headers from `options` and `req` to
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* `outgoing` which is then used to fire the proxied
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* request.
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*
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* Examples:
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*
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* common.setupOutgoing(outgoing, options, req)
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* // => { host: ..., hostname: ...}
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*
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* @param {Object} Outgoing Base object to be filled with required properties
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* @param {Object} Options Config object passed to the proxy
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* @param {ClientRequest} Req Request Object
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* @param {String} Forward String to select forward or target
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*
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* @return {Object} Outgoing Object with all required properties set
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*
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* @api private
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*/
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common.setupOutgoing = function(outgoing, options, req, forward) {
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outgoing.port = options[forward || 'target'].port ||
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(~['https:', 'wss:'].indexOf(options[forward || 'target'].protocol) ? 443 : 80);
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['host', 'hostname', 'socketPath'].forEach(
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function(e) { outgoing[e] = options[forward || 'target'][e]; }
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);
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['method', 'headers'].forEach(
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function(e) { outgoing[e] = req[e]; }
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);
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if (options.headers){
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extend(outgoing.headers, options.headers);
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}
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if (options[forward || 'target'].protocol == 'https:') {
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outgoing.rejectUnauthorized = (typeof options.secure === "undefined") ? true : options.secure;
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}
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outgoing.agent = options.agent || false;
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outgoing.localAddress = options.localAddress;
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//
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// Remark: If we are false and not upgrading, set the connection: close. This is the right thing to do
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// as node core doesn't handle this COMPLETELY properly yet.
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//
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if (!outgoing.agent) {
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outgoing.headers = outgoing.headers || {};
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if (typeof outgoing.headers.connection !== 'string'
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|| ! /(^|,)\s*upgrade\s*($|,)/i.test(outgoing.headers.connection)
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) { outgoing.headers.connection = 'close'; }
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}
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// the final path is target path + relative path requested by user:
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var target = options[forward || 'target'];
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var targetPath = target && options.prependPath !== false
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? (target.path || '')
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: '';
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//
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// Remark: Can we somehow not use url.parse as a perf optimization?
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//
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var outgoingPath = !options.toProxy
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? url.parse(req.url).path
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: req.url;
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outgoing.path = common.urlJoin(targetPath, outgoingPath);
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return outgoing;
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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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* Examples:
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*
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* common.setupSocket(socket)
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* // => Socket
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*
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* @param {Socket} Socket instance to setup
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*
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* @return {Socket} Return the configured socket.
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*
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* @api private
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*/
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common.setupSocket = function(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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return socket;
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};
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/**
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* Get the port number from the host. Or guess it based on the connection type.
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*
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* @param {Request} req Incoming HTTP request.
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*
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* @return {String} The port number.
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*
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* @api private
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*/
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common.getPort = function(req) {
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var res = req.headers.host ? req.headers.host.match(/:(\d+)/) : '';
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return res ?
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res[1] :
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req.connection.pair ? '443' : '80';
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};
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/**
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* OS-agnostic join (doesn't break on URLs like path.join does on Windows)>
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*
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* @return {String} The generated path.
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*
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* @api private
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*/
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common.urlJoin = function() {
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var args = Array.prototype.slice.call(arguments);
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// Join all strings, but remove empty strings so we don't get extra slashes from
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// joining e.g. ['', 'am']
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return args.filter(function filter(a) {
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return !!a;
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}).join('/').replace(/\/+/g, '/');
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};
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