ancillary-http/spdyroot.js

A library that allows you to move incoming http request to other, unrelated processes using the module 'ancillary'

var spdy = require("spdy");
var fs = require("fs");
var net = require("net");
var anc = require("ancillary");
var anchttp = require("./index.js");
var httpjs = require("http.js");
var crypto = require("crypto");

function md5(data){
    var hash = crypto.createHash("md5");
    hash.update(data,"utf8");
    return hash.digest("hex");
}



module.exports = function(port,opts,target){   
    
    
    var serverpath = "/tmp/"+md5(__filename+":"+port);    
    
    try{
        fs.unlinkSync(serverpath);
    }catch(e){}
    
    var server = net.createServer({allowHalfOpen:true},function(c){
        anc.send(target,c);
    }).listen(serverpath);
    
    
    var s = spdy.createServer(opts,handle);
    
    
    function handle(req,res,sock){
        var c = net.connect(serverpath,function(){
            
            req.headers.connection = "Close";
            var header = req.method+" "+req.url+" HTTP/1.1\r\n";
            for(var h in req.headers){
                header += h+": "+req.headers[h]+"\r\n";
            }
            header += "\r\n";
            c.write(header);
			(sock?sock:req).pipe(c);
            
            var res2 = new httpjs.httpParser(c,false);  
			
        	var open = false;
            res2.on("open",function(){
                open = true;
                res.writeHead(res2.statusCode,res2.statusMessage,res2.headers);				
				res2.on("data",function(d){
					res.write(d);
				});
				res2.on("close",function(){
					res.end();
				});
            });
            res2.on("close",function(){
                if(!open){
					res.writeHead(404,"Not found");
                    res.end();
                }
            });
        });
    }
    
    
    s.on("upgrade",function(req,sock,data){
		var res = new httpjs.httpResponse(sock);
		handle(req,res,sock);
	});
    
    
    s.listen(port);
}