whistle/biz/webui/cgi-bin/composer.js

HTTP, HTTPS, Websocket debugging proxy

var http = require('http');
var url = require('url');
var config = require('../lib/config');
var util = require('../lib/util');

function parseHeaders(headers, rawHeaderNames) {
  if (!headers || typeof headers != 'string') {
    return {};
  }

  try {
    return util.lowerCaseify(JSON.parse(headers), rawHeaderNames);
  } catch(e) {}

  return util.parseHeaders(headers, rawHeaderNames);
}

module.exports = function(req, res) {
  var _url = req.body.url;

  if (_url && typeof _url == 'string') {
    _url = util.encodeNonAsciiChar(_url.replace(/#.*$/, ''));
    var options = url.parse(util.setProtocol(_url));
    var rawHeaderNames = {};
    var headers = parseHeaders(req.body.headers, rawHeaderNames);
    if (!headers['user-agent']) {
      headers['user-agent'] = 'whistle/' + config.version;
    }

    if (options.protocol == 'https:') {
      headers[config.HTTPS_FIELD] = 1;
      if (options.port == 443) {
        options.port = '';
      }
    } else if (options.port == 80) {
      options.port = '';
    }

    headers.host = options.hostname;
    if (options.port) {
      headers.host += ':' + options.port;
    }
    options.protocol = null;
    options.hostname = null;
    options.method = req.body.method;
    options.host = '127.0.0.1';
    options.port = config.port;
    if (headers['content-length'] != null) {
      req.body.body = util.toBuffer(req.body.body || '');
      headers['content-length'] = req.body.body.length;
    }

    headers[config.CLIENT_IP_HEAD] = util.getClientIp(req);
    options.headers = util.formatHeaders(headers, rawHeaderNames);
    http.request(options, function(res) {
      res.on('error', util.noop);
      util.drain(res);
    })
.on('error', util.noop)
.end(req.body.body);
  }

  res.json({ec: 0, em: 'success'});
};