Telegram Web, preconfigured for usage in I2P.
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101 lines
3.0 KiB
101 lines
3.0 KiB
11 years ago
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var url = require('url');
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var httpProxy = require('http-proxy');
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var log = require('../logger').create('proxy');
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var parseProxyConfig = function(proxies) {
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var proxyConfig = {};
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var endsWithSlash = function(str) {
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return str.substr(-1) === '/';
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};
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if (!proxies) {
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return proxyConfig;
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}
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Object.keys(proxies).forEach(function(proxyPath) {
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var proxyUrl = proxies[proxyPath];
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var proxyDetails = url.parse(proxyUrl);
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var pathname = proxyDetails.pathname;
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// normalize the proxies config
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// should we move this to lib/config.js ?
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if (endsWithSlash(proxyPath) && !endsWithSlash(proxyUrl)) {
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log.warn('proxy "%s" normalized to "%s"', proxyUrl, proxyUrl + '/');
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proxyUrl += '/';
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}
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if (!endsWithSlash(proxyPath) && endsWithSlash(proxyUrl)) {
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log.warn('proxy "%s" normalized to "%s"', proxyPath, proxyPath + '/');
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proxyPath += '/';
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}
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if (pathname === '/' && !endsWithSlash(proxyUrl)) {
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pathname = '';
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}
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proxyConfig[proxyPath] = {
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host: proxyDetails.hostname,
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port: proxyDetails.port,
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baseProxyUrl: pathname,
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https: proxyDetails.protocol === 'https:'
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};
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if (!proxyConfig[proxyPath].port) {
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proxyConfig[proxyPath].port = proxyConfig[proxyPath].https ? '443' : '80';
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}
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});
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return proxyConfig;
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};
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/**
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* Returns a handler which understands the proxies and its redirects, along with the proxy to use
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* @param proxy A http-proxy.RoutingProxy object with the proxyRequest method
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* @param proxies a map of routes to proxy url
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* @return {Function} handler function
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*/
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var createProxyHandler = function(proxy, proxyConfig, proxyValidateSSL) {
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var proxies = parseProxyConfig(proxyConfig);
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var proxiesList = Object.keys(proxies).sort().reverse();
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if (!proxiesList.length) {
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return function(request, response, next) {
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return next();
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};
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}
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proxy.on('proxyError', function(err, req) {
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if (err.code === 'ECONNRESET' && req.socket.destroyed) {
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log.debug('failed to proxy %s (browser hung up the socket)', req.url);
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} else {
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log.warn('failed to proxy %s (%s)', req.url, err);
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}
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});
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return function(request, response, next) {
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for (var i = 0; i < proxiesList.length; i++) {
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if (request.url.indexOf(proxiesList[i]) === 0) {
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var proxiedUrl = proxies[proxiesList[i]];
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log.debug('proxying request - %s to %s:%s', request.url, proxiedUrl.host, proxiedUrl.port);
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request.url = request.url.replace(proxiesList[i], proxiedUrl.baseProxyUrl);
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proxy.proxyRequest(request, response, {
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host: proxiedUrl.host,
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port: proxiedUrl.port,
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target: { https: proxiedUrl.https, rejectUnauthorized: proxyValidateSSL }
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});
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return;
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}
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}
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return next();
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};
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};
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exports.create = function(/* config.proxies */ proxies, /* config.proxyValidateSSL */ validateSSL) {
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return createProxyHandler(new httpProxy.RoutingProxy({changeOrigin: true}), proxies, validateSSL);
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};
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