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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | var httpProxy = module.exports,
extend = require('util')._extend,
parse_url = require('url').parse,
EE3 = require('eventemitter3'),
http = require('http'),
https = require('https'),
web = require('./passes/web-incoming'),
ws = require('./passes/ws-incoming');
httpProxy.Server = ProxyServer;
/**
* Returns a function that creates the loader for
* either `ws` or `web`'s passes.
*
* Examples:
*
* httpProxy.createRightProxy('ws')
* // => [Function]
*
* @param {String} Type Either 'ws' or 'web'
*
* @return {Function} Loader Function that when called returns an iterator for the right passes
*
* @api private
*/
function createRightProxy(type) {
return function(options) {
return function(req, res /*, [head], [opts] */) {
var passes = (type === 'ws') ? this.wsPasses : this.webPasses,
args = [].slice.call(arguments),
cntr = args.length - 1,
head, cbl;
/* optional args parse begin */
if(typeof args[cntr] === 'function') {
cbl = args[cntr];
cntr--;
}
var requestOptions = options;
if(
!(args[cntr] instanceof Buffer) &&
args[cntr] !== res
) {
//Copy global options
requestOptions = extend({}, options);
//Overwrite with request options
extend(requestOptions, args[cntr]);
cntr--;
}
if(args[cntr] instanceof Buffer) {
head = args[cntr];
}
/* optional args parse end */
['target', 'forward'].forEach(function(e) {
if (typeof requestOptions[e] === 'string')
requestOptions[e] = parse_url(requestOptions[e]);
});
if (!requestOptions.target && !requestOptions.forward) {
return this.emit('error', new Error('Must provide a proper URL as target'));
}
for(var i=0; i < passes.length; i++) {
/**
* Call of passes functions
* pass(req, res, options, head)
*
* In WebSockets case the `res` variable
* refer to the connection socket
* pass(req, socket, options, head)
*/
if(passes[i](req, res, requestOptions, head, this, cbl)) { // passes can return a truthy value to halt the loop
break;
}
}
};
};
}
httpProxy.createRightProxy = createRightProxy;
function ProxyServer(options) {
EE3.call(this);
options = options || {};
options.prependPath = options.prependPath === false ? false : true;
this.web = this.proxyRequest = createRightProxy('web')(options);
this.ws = this.proxyWebsocketRequest = createRightProxy('ws')(options);
this.options = options;
this.webPasses = Object.keys(web).map(function(pass) {
return web[pass];
});
this.wsPasses = Object.keys(ws).map(function(pass) {
return ws[pass];
});
this.on('error', this.onError, this);
}
require('util').inherits(ProxyServer, EE3);
ProxyServer.prototype.onError = function (err) {
//
// Remark: Replicate node core behavior using EE3
// so we force people to handle their own errors
//
if(this.listeners('error').length === 1) {
throw err;
}
};
ProxyServer.prototype.listen = function(port, hostname) {
var self = this,
closure = function(req, res) { self.web(req, res); };
this._server = this.options.ssl ?
https.createServer(this.options.ssl, closure) :
http.createServer(closure);
if(this.options.ws) {
this._server.on('upgrade', function(req, socket, head) { self.ws(req, socket, head); });
}
this._server.listen(port, hostname);
return this;
};
ProxyServer.prototype.close = function(callback) {
var self = this;
if (this._server) {
this._server.close(done);
}
// Wrap callback to nullify server after all open connections are closed.
function done() {
self._server = null;
if (callback) {
callback.apply(null, arguments);
}
};
};
ProxyServer.prototype.before = function(type, passName, callback) {
if (type !== 'ws' && type !== 'web') {
throw new Error('type must be `web` or `ws`');
}
var passes = (type === 'ws') ? this.wsPasses : this.webPasses,
i = false;
passes.forEach(function(v, idx) {
if(v.name === passName) i = idx;
})
if(i === false) throw new Error('No such pass');
passes.splice(i, 0, callback);
};
ProxyServer.prototype.after = function(type, passName, callback) {
if (type !== 'ws' && type !== 'web') {
throw new Error('type must be `web` or `ws`');
}
var passes = (type === 'ws') ? this.wsPasses : this.webPasses,
i = false;
passes.forEach(function(v, idx) {
if(v.name === passName) i = idx;
})
if(i === false) throw new Error('No such pass');
passes.splice(i++, 0, callback);
};
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