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Capture Https Traffic

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FiddlerCore

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Avinash asked on 20 Feb 2015, 08:03 AM

Hi Eric,
I was a newbie to FiddlerCore.I want to capture https traffic when requested to website using Selenium and FiddlerCore in .net.Coded as below

CODE:

CONFIG.bCaptureCONNECT = true;
CONFIG.IgnoreServerCertErrors = true;
var cert = InstallCertificate();// getting true
FiddlerCoreStartupFlags flags = FiddlerCoreStartupFlags.DecryptSSL & FiddlerCoreStartupFlags.AllowRemoteClients & FiddlerCoreStartupFlags.CaptureFTP & FiddlerCoreStartupFlags.ChainToUpstreamGateway & FiddlerCoreStartupFlags.MonitorAllConnections & FiddlerCoreStartupFlags.CaptureLocalhostTraffic;
FiddlerApplication.Startup(desiredPort, flags);
FiddlerApplication.BeforeRequest += RequestDetails;

private static void RequestDetails(Session oSession)
{
Console.WriteLine("Request URL {0}", oSession.fullUrl);// getting only http traffic details

}

public static bool InstallCertificate()
{

if (!CertMaker.rootCertExists())
{
if (!CertMaker.createRootCert())
return false;

if (!CertMaker.trustRootCert())
return false;
}

return true;
}

Could you suggest me the way to capture https traffic

Thank you

Regards,
Avinash

7 Answers, 1 is accepted

answered on 26 Feb 2015, 02:46 PM

Hi, Avinash-- Please open a new ticket for new issues. This will help ensure that your issues aren't overlooked.

You didn't say what platform you're using, but the error message here suggests that you're using FiddlerCore on Mono on either Mac or Linux. The error message means exactly as it says-- it can't find the lsof executable because the value of the fiddler.config.path.lsof preference is set incorrectly.

The most likely explanation is that you could fix this by:

FiddlerApplication.Prefs.SetStringPref("fiddler.config.path.lsof", "/usr/bin/lsof");

But if that doesn't work, you'll need to find where lsof is on your system.

Only the Mono builds of Fiddler use lsof because IPHelper.dll does not exist on Mac or Linux, and hence the code described in this blog post does not run on those platforms.

answered on 28 Jun 2018, 12:20 PM

Hi Eric,

your the best problem solver please help me.

I am usinfg fiddler to capture https traffic . I used the following code please look at this
Fiddler.FiddlerApplication.Startup(iSecureEndpointPort,
FiddlerCoreStartupFlags.Default |
FiddlerCoreStartupFlags.AllowRemoteClients |
FiddlerCoreStartupFlags.DecryptSSL |
FiddlerCoreStartupFlags.MonitorAllConnections |
FiddlerCoreStartupFlags.RegisterAsSystemProxy |
FiddlerCoreStartupFlags.ChainToUpstreamGateway |
FiddlerCoreStartupFlags.CaptureLocalhostTraffic);

Fiddler.FiddlerApplication.OnNotification += delegate (object snder, NotificationEventArgs oNEA) { MessageBox.Show("** NotifyUser: " + oNEA.NotifyString); };
Fiddler.FiddlerApplication.Log.OnLogString += delegate (object snder, LogEventArgs oLEA) { MessageBox.Show("** LogString: " + oLEA.LogString); };

Fiddler.FiddlerApplication.BeforeRequest += FiddlerApplication_BeforeRequest;
//FiddlerApplication.AfterSessionComplete += new SessionStateHandler(FiddlerApplication_AfterSessionComplete);
Fiddler.FiddlerApplication.AfterSessionComplete += FiddlerApplication_AfterSessionComplete;

void FiddlerApplication_BeforeRequest(Fiddler.Session oSession)
{
try
{
oSession.bBufferResponse = false;
oSession["X-AutoAuth"] = "(default)";
}

}

public static bool InstallCertificate()
{

try
{
if (!CertMaker.rootCertExists()) // check root cert existing or not
{
if (!CertMaker.createRootCert()) //Generate root cert
{
return false;
}

if (!CertMaker.trustRootCert())
{
return false;
}

}
return true;
}

when I am running the browser from code then it's capturing session for http but not for https .
its telling "your connection is not private" . please help me.