Extensible man in the middle HTTP proxy with SSL support. It was written because I need a way to monitor and possibly stub some browser request in selenium tests. It also available as NuGet Package

Setup HTTP proxy:

  var httpProxyServer = new HttpProxyServer("localhost", new HttpProxy());
  httpProxyServer.Start().WaitOne();
  
  // do stuff
  
  httpProxyServer.stop();

Setup SSL proxy:

  var certificate = new X509Certificate2("path_to_sertificate", "password");
  var sslProxyServer = new HttpProxyServer("localhost", new SslProxy(certificate));
  sslProxyServer.start();
  
  // do ssl stuff
  
  sslProxyServer.stop();

Request are processed in 5 stages:

• receive request from client
• connect to destination server
• send request to server and receive response
• send response back to client
• complete processing and close connections

It is possible to add additional behavior to any stage with delegates:

  var httpProxy = new HttpProxy(){
    OnRequestReceived = context => {},
    OnServerConnected = context => {},
    OnResponseReceived = context => {},
    OnResponseSent = context => {},
    OnProcessingComplete = context => {}
  };

Context stores request information during processing single request. What you can possibly do with it ?

• modify request and response headers
• modify request and response body
• respond by yourself on behalf of destination server
• ...or something in between

Take a look at console app and tests for usage example.