expose node.js internal http parser.

parser.js

var HTTPParser = process.binding('http_parser').HTTPParser;

exports.HTTPParser = HTTPParser;

HTTPParser.prototype.parse = function(data) {
  var buffer = this.buffer = this.buffer || "";
  var start = buffer.length;
  buffer += data;

  this.execute(new Buffer(buffer), start, data.length);
};

HTTPParser.prototype.onHeadersComplete = function(info) {
  this.info = info;
}

var data = "GET / HTTP/1.0\r\nUser-Agent: Wget/1.11.4\r\nAccept: */*\r\nHost: www.douban.com\r\nConnection: Keep-Alive\r\n\r\n"
var parser = new HTTPParser(HTTPParser.REQUEST);
// do parse
parser.parse(data);

// get it!
console.log(parser.info)