ndoejs解析req，伪造http请求

require("./m3m4")

var http = require('http');

var server = http.createServer();
server.listen(100, function () {
    var port = server.address().port;
    console.log('HTTP(s) proxy server listening on port %d', port);
});
var fs=require("fs")

var request = require('request');

function eachHeader (obj, fn) {
    if (Array.isArray(obj.rawHeaders)) {
        // ideal scenario... >= node v0.11.x
        // every even entry is a "key", every odd entry is a "value"
        var key = null;
        obj.rawHeaders.forEach(function (v) {
            if (key === null) {
                key = v;
            } else {
                fn(key, v);
                key = null;
            }
        });
    } else {
        // otherwise we can *only* proxy the header names as lowercase'd
        var headers = obj.headers;
        if (!headers) return;
        Object.keys(headers).forEach(function (key) {
            var value = headers[key];
            if (Array.isArray(value)) {
                // set-cookie
                value.forEach(function (val) {
                    fn(key, val);
                });
            } else {
                fn(key, value);
            }
        });
    }
}
var hopByHopHeaders = [
    'Connection',
    'Keep-Alive',
    'Proxy-Authenticate',
    'Proxy-Authorization',
    'TE',
    'Trailers',
    'Transfer-Encoding',
    'Upgrade'
];

// create a case-insensitive RegExp to match "hop by hop" headers
var isHopByHop = new RegExp('^(' + hopByHopHeaders.join('|') + ')$', 'i');
//伪造http
function parse (req, server) {

    var parsed = require("url").parse(req.url);

    parsed.uri=parsed.href;
    // proxy the request HTTP method
    parsed.method = req.method;

    // setup outbound proxy request HTTP headers
    var headers = {};

    parsed.headers = headers;
    eachHeader(req, function (key, value) {
        var keyLower = key.toLowerCase();

        if (isHopByHop.test(key)) {
        } else {
            var v = headers[key];
            if (Array.isArray(v)) {
                v.push(value);
            } else if (null != v) {
                headers[key] = [ v, value ];
            } else {
                headers[key] = value;
            }
        }
    });

    if (null == parsed.port) {
        // default the port number if not specified, for >= node v0.11.6...
        // https://github.com/joyent/node/issues/6199
        parsed.port = 80;
    }
    return parsed
}

server.on('request', function (req, res) {

    var url=req.url

    var parsed=parse(req)
//    console.log(parsed)
    if(url.Test("reduce_bd-logo1_oper.png")){

        request(parsed,function(err,resp,body){
            res.writeHeader(200)
            fs.createReadStream("a.png").pipe(res)
        }).pipe(fs.createWriteStream("a.png"))
    }else{
        request(parsed,function(err,resp,body){
        }).pipe(res)
    }

})