/*
*
*
*/
public static HTTPRedirect getInstance()
{
if (cInstance == null)
cInstance = new HTTPRedirect();
return (cInstance);
}
/*
*
*
*/
public static HTTPRedirect getInstance()
{
if (cInstance == null)
{
cInstance = new HTTPRedirect();
}
return(cInstance);
}
/*
*
*
*/
public void HandleClientRequest(RequestObj pRequestObj)
{
String lHTTPRequestString = pRequestObj.ClientStreamReader.ReadLine();
if (String.IsNullOrEmpty(lHTTPRequestString))
{
throw new Exception("Client request stream corrupted.");
}
// Read the request headers from the client and copy them to the request settings
// Set values : METHOD scheme://host/Path
Logging.LogMessage(String.Format("HTTPClientRequest.HandleClientRequest() : HTTP Request string: \"{0}\"", lHTTPRequestString), Logging.Level.DEBUG, pRequestObj.Counter);
pRequestObj.parseRequestString(lHTTPRequestString);
this.ReadRequestHeadersFromClient(pRequestObj);
pRequestObj.Host = pRequestObj.ClientRequestHeaders["host"].ToString();
pRequestObj.Scheme = "http";
/*
* Verify if request parameters are correct.
*/
if (!Regex.Match(pRequestObj.Method.ToLower(), @"^\s*(get|put|post|head|delete|trace|options|connect)\s*$").Success)
{
throw new WebException("Client request contains an unsupproted request method");
}
String lRequestedURL = String.Format("{0}://{1}{2}", pRequestObj.Scheme, pRequestObj.Host, pRequestObj.Path);
/*
* If HTTP request was redirected to an other URL in a previous request
* replace current request with the redirect location
*/
if (RedirectCache.Instance.NeedsRequestBeMapped(lRequestedURL))
{
Logging.LogMessage(String.Format("HTTPClientRequest.HandleClientRequest() : REDIRECT(301/302) from \"{0}\" to \"{1}\"", lRequestedURL, RedirectCache.Instance.GetElement(lRequestedURL).URL), Logging.Level.INFO, pRequestObj.Counter);
// DO SSL STRIPPING THINGS HERE !!!!
// Replace the URL by the URL saved in the cache ...
RedirectHost lTmpHost = RedirectCache.Instance.GetElement(pRequestObj.getRequestedURL());
pRequestObj.Method = "GET";
pRequestObj.Scheme = lTmpHost.Scheme;
pRequestObj.Host = lTmpHost.Host;
pRequestObj.Path = lTmpHost.Path;
lTmpHost.IncCounter();
} // if (RedirectCac...
/*
* If HTTP request was answered with an HSTS server response header
* conduct an HTTPS request instead of HTTP
*/
else if (HSTSCache.Instance.GetElement(pRequestObj.Host) != null)
{
Logging.LogMessage(String.Format("HTTPClientRequest.HandleClientRequest() : HSTS protocol replacement : http://{0} -> https://{0} \n", pRequestObj.Host), Logging.Level.DEBUG, pRequestObj.Counter);
pRequestObj.Scheme = "https";
} // if (HSTSCache...
try
{
/*
* Forward request according to the URL defined
* in the command line parameter.
*/
if (!String.IsNullOrEmpty(Config.RedirectToURL) && pRequestObj.Method.ToLower() == "get")
{
HTTPRedirect.getInstance().processRequest(pRequestObj.ClientStream, Config.RedirectToURL, pRequestObj.ClientRequestHeaders);
}
else
{
this.DoHttpProcessing(pRequestObj);
}
}
catch (WebException lEx)
{
/*
* 1. Sending server response
*/
var lResponse = lEx.Response as HttpWebResponse;
if (lResponse != null && lResponse.StatusCode != HttpStatusCode.OK)
{
String ErrorCode = String.Format("HTTP/{0} {1} {2}\n", lResponse.ProtocolVersion, (int)lResponse.StatusCode, lResponse.StatusDescription);
pRequestObj.ClientStream.Write(Encoding.ASCII.GetBytes(ErrorCode), 0, ErrorCode.Length);
}
else
{
String ErrorCode = String.Format("HTTP/1.1 500 Internal server error\n");
pRequestObj.ClientStream.Write(Encoding.ASCII.GetBytes(ErrorCode), 0, ErrorCode.Length);
} // if (lRespon...
/*
* 2. Sending server response headers
*/
if (lEx.Response != null && lEx.Response.Headers != null && lEx.Response.Headers.Count > 0)
{
foreach (String la in lEx.Response.Headers.AllKeys)
{
String lResp = String.Format("{0}: {1}\n", la, lEx.Response.Headers[la]);
pRequestObj.ClientStream.Write(Encoding.ASCII.GetBytes(lResp), 0, lResp.Length);
} // foreach (Stri...
} // if (lEx.Resp ...
pRequestObj.ClientStream.Write(Encoding.ASCII.GetBytes("\n"), 0, 1);
/*
* 3. Sending server response body
*/
try
{
var resp = new StreamReader(lEx.Response.GetResponseStream()).ReadToEnd();
pRequestObj.ClientStream.Write(Encoding.ASCII.GetBytes(resp), 0, resp.Length);
}
catch (Exception lEx2)
{
Logging.LogMessage(String.Format("HTTPClientRequest.DoHttpProcessing(EXCEPTION2) : {0} -> {1} \n{2}", pRequestObj.getRequestedURL(), lEx.Message, lEx.StackTrace), Logging.Level.ERROR, pRequestObj.Counter);
}
}
catch (Exception lEx)
{
Logging.LogMessage(String.Format("HTTPClientRequest.DoHttpProcessing(EXCEPTION) : {0} -> {1} \n{2}", pRequestObj.getRequestedURL(), lEx.Message, lEx.StackTrace), Logging.Level.ERROR, pRequestObj.Counter);
}
finally
{
if (pRequestObj.ClientStreamReader != null)
{
pRequestObj.ClientStreamReader.Close();
}
if (pRequestObj.ClientStream != null)
{
pRequestObj.ClientStream.Close();
}
if (pRequestObj.ServerWebResponse != null)
{
pRequestObj.ServerWebResponse.Close();
}
}
}
/*
*
*
*/
private static void DoHttpProcessing(String pSrcMAC, String pSrcIP, String pSrcPort, TcpClient pClient)
{
Stream lClientStream = pClient.GetStream();
Stream lOutStream = lClientStream;
StreamReader lClientStreamReader = new StreamReader(lClientStream);
String[] lReqSplitBuffer;
String lMethod = String.Empty;
String lRemoteURI = String.Empty;
String lURL = String.Empty;
Version lVersion = new Version(1, 0);
int lContentLen = 0;
String lHTTPData = String.Empty;
String lHTTPCommand = String.Empty;
String lLine = String.Empty;
String lPOSTData = String.Empty;
Hashtable lHeaders = new Hashtable();
try
{
// Read the first line HTTP command
lHTTPCommand = lClientStreamReader.ReadLine();
/*
* Header corrupted. Stop thread execution.
*/
if (String.IsNullOrEmpty(lHTTPCommand))
{
lClientStreamReader.Close();
lClientStream.Close();
return;
}
/*
* Break up the line into three components
*/
lReqSplitBuffer = lHTTPCommand.Split(lSpaceSplit, 3);
lMethod = lReqSplitBuffer[0];
lRemoteURI = lReqSplitBuffer[1];
lURL = String.Empty;
// Read the request headers from the client and copy them to our request
lContentLen = ReadRequestHeaders(lClientStreamReader, ref lHeaders);
// Build the URI
if (lHeaders != null && lHeaders.ContainsKey("host") && lHeaders["host"].ToString().Length > 0)
{
lURL = string.Format("http://{0}:{1}{2}", lHeaders["host"].ToString(), cRemotePort, lRemoteURI);
}
else
{
lURL = string.Format("http://{0}:{1}{2}", cRemoteHost, cRemotePort, lRemoteURI);
}
if (Program.cDebuggingOn)
{
Console.WriteLine("{0} URL : \"{1}\"", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), lURL);
}
/*
* Redirect URL
*/
if (!String.IsNullOrEmpty(cRedirectURL) && lMethod.ToLower() == "get")
{
HTTPRedirect.getInstance().processRequest(lOutStream, cRedirectURL, lHeaders);
/*
* Process HTTP request
*/
}
else
{
// StreamReader pClientStreamReader, Stream pOutStream, String pMethod, String pURL, Hashtable pHeaders, int pContentLen, String pHTTPCommand, String pPOSTData
HTTPProxy.getInstance().processRequest(lClientStreamReader, lOutStream, lMethod, lURL, lHeaders, lContentLen, lHTTPCommand, out lHTTPData);
String lPipeData = String.Format("TCP||{0}||{1}||{2}||{3}||{4}||{5}\r\n", pSrcMAC, pSrcIP, pSrcPort, cRemoteIP, cRemotePort, lHTTPData);
Program.WriteToPipe(lPipeData);
if (Program.cDebuggingOn)
{
Console.WriteLine(lPipeData.TrimEnd());
}
} // if (!String.IsNullOrEmpty(cR...
}
catch (Exception ex)
{
if (Program.cDebuggingOn)
{
Console.WriteLine(ex.Message);
}
}
finally
{
if (lClientStreamReader != null)
{
lClientStreamReader.Close();
}
if (lClientStream != null)
{
lClientStream.Close();
}
if (lOutStream != null)
{
lOutStream.Close();
}
}
}
