lib/agents.js
function mixinProxying(agent, proxyOpts) {
  agent.proxy = proxyOpts;

  var orig = _.pick(agent, 'createConnection', 'addRequest');

  // Make the tcp or tls connection go to the proxy, ignoring the
  // destination host:port arguments.
  agent.createConnection = function(port, host, options) {
    return orig.createConnection.call(this,
                                      this.proxy.port, this.proxy.host, options);
  };

  // tell the proxy where we really want to go by fully-qualifying the path
  // part. Force a localAddress if one was configured
  agent.addRequest = function(req, host, port, localAddress) {
    req.path = this.proxy.innerProtocol + '//' + host + ':' + port + req.path;
    if (this.proxy.localAddress) {
      localAddress = this.proxy.localAddress;
    }
    return orig.addRequest.call(this, req, host, port, localAddress);
  };
}
function mixinProxying(agent, proxyOpts) {
  agent.proxy = proxyOpts;

  var orig = _.pick(agent, 'createConnection', 'addRequest');

  // Make the tcp or tls connection go to the proxy, ignoring the
  // destination host:port arguments.
  agent.createConnection = function(port, host, options) {
    return orig.createConnection.call(this,
                                      this.proxy.port, this.proxy.host, options);
  };

  // tell the proxy where we really want to go by fully-qualifying the path
  // part. Force a localAddress if one was configured
  agent.addRequest = function(req, host, port, localAddress) {
    req.path = this.proxy.innerProtocol + '//' + host + ':' + port + req.path;
    if (this.proxy.localAddress) {
      localAddress = this.proxy.localAddress;
    }
    return orig.addRequest.call(this, req, host, port, localAddress);
  };
}
function mixinProxying ( agent , proxyOpts ) { agent . proxy = proxyOpts ; var orig = _ . pick ( agent , 'createConnection' , 'addRequest' ) ; // Make the tcp or tls connection go to the proxy, ignoring the // destination host:port arguments. agent . createConnection = function ( port , host , options ) { return orig . createConnection . call ( this , this . proxy . port , this . proxy . host , options ) ; } ; // tell the proxy where we really want to go by fully-qualifying the path // part. Force a localAddress if one was configured agent . addRequest = function ( req , host , port , localAddress ) { req . path = this . proxy . innerProtocol + '//' + host + ':' + port + req . path ; if ( this . proxy . localAddress ) { localAddress = this . proxy . localAddress ; } return orig . addRequest . call ( this , req , host , port , localAddress ) ; } ; }
Override createConnection and addRequest methods on the supplied agent.
http.Agent and https.Agent will set up createConnection in the constructor.
Override createConnection and addRequest methods on the supplied agent . http . Agent and https . Agent will set up createConnection in the constructor .