#!/usr/bin/env node
var argv, http, url;
argv = require("optimist").default("port", 1337).alias("p", "port").argv;
http = require("http");
url = require("url");
http.createServer(function (req, res) {
    var parsedUrl, proxyUrl;
    // Enable Cross-Origin Resource Sharing (CORS).
    res.setHeader("Access-Control-Allow-Origin", "*");
    res.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
    // According to the spec, the headers have to be ASCII lowercase.
    res.setHeader("Access-Control-Allow-Headers", "content-type");
    res.setHeader("Access-Control-Max-Age", "2520");
    // Answer preflight requests.
    if (req.method === "OPTIONS") {
        res.writeHead(200);
        res.end();
    } else {
        parsedUrl = url.parse(req.url, true);
        if (parsedUrl.query.hasOwnProperty("url")) {
            proxyUrl = url.parse(parsedUrl.query.url);
            var proxyOptions = {
                "host": proxyUrl.host,
                "port": proxyUrl.port || 80,
                "path": proxyUrl.pathname,
                "method": req.method,
                "headers": {}
            };
            // Copy some useful HTTP headers.
            if (req.headers.hasOwnProperty("accept")) proxyOptions.headers["Accept"] = req.headers["accept"];
            if (req.headers.hasOwnProperty("content-type")) proxyOptions.headers["Content-Type"] = req.headers["content-type"];
            // url.parse does not parse localhost correctly.
            if (proxyOptions.host.indexOf("localhost") !== -1) {
                proxyOptions.host = proxyOptions.host.split(":")[0];
            }
            // url.parse does not parse complex pathnames correctly.
            proxyOptions.path += req.url.split(proxyOptions.path)[1];
            var proxyReq = http.request(proxyOptions, function (proxyRes) {
                var resHeaders;
                resHeaders = {};
                if (proxyRes.headers.hasOwnProperty("content-type")) resHeaders["Content-Type"] = proxyRes.headers["content-type"];
                res.writeHead(200, resHeaders);
                proxyRes.on("data", function (chunk) {
                    res.write(chunk);
                });
                proxyRes.on("end", function () {
                    res.end();
                });
            });
            proxyReq.on("error", function (e) {
                res.writeHead(500);
                res.end("Captain, we crashed: " + e.code + "\n");
            });
            // I tried to use pipes here, but sometimes they had a hiccup.
            req.on("data", function (chunk) {
                proxyReq.write(chunk);
            });
            req.on("end", function () {
                proxyReq.end();
            });
        } else {
            res.writeHead(400);
            res.end("\"url\", did you pass it?\n");
        }
    }
}).listen(argv.port);
console.log("Server running at http://127.0.0.1:" + argv.port + "/");