When my wireless  router is down, Fiddler displays this:

[Fiddler] DNS Lookup for "www.google.com" failed. The system reports that no network connection is available. System.Net.Sockets.SocketException No such host is known

I do NOT want that message to be displayed. I want browser's default message" connection failed " . Any ideas?

Thank you

Is there some sort of way we can package a Fiddler replacement rule into a standalone .dll and place it in the program's folder to have the same effect as Fiddler changing it without having Fiddler installed on a computer?

Is there an automatic tool for removing the Fiddler certs when I'm done working with them? That would save me from having to go into settings and going over the different tabs to remove all of them.

Thanks,
Ram.

Eric - I have used Fiddler as an everyday part of my job for about 5 years now. I am proficient with it. Rarely need to use rule editor - but have done some. 

Ok, so I have to capture many different websites with Fiddler. Many of them are SSL sites. And I don't think I have ever had this issue.
When I go to the site https://www.ote.gr/web/guest (its in Greece) it's not very fast and takes a while to load, but with fiddler it is taking longer and I wonder if it is somehow creating the 502's I am seeing. If you go to the site and see how it loads, then use the latest Fiddler (as of today Feb 11 2014 ver v4.4.9.9) you should see the same thing. I tried an old 2.4 fiddler on a different network and different machine too just to see.. no difference. Many of the connections will be ok.. but then you get a bunch of 502s on http to ssl tunnels... then... you'll see that the page doesn't render properly.

But.. if you were to go to say capture https://www.bankofamerica.com no problem.

I tried the:
 static function OnBeforeRequest(oSession: Session) {
if (oSession.HTTPMethodIs("CONNECT") && oSession.HostnameIs("www.ote.com")) 
{ 
  oSession["x-OverrideSslProtocols"] = "ssl3"; 
  FiddlerApplication.Log.LogString("Legacy compat applied for inbound request to BuggySite.com"); 
}

As you can guess, it didn't help. So I am here looking for a hand. Let me know if you need anything else to help me with this.

I tried attaching a saz with the 502s for your review but the forum tool wouldn't let me. Maybe too large. I did give you a snap shot of the page render with and without fiddler runnning.

My hope is you can tell me some timeout parameter to change so that it won't time out or a way to speed up the tunnel connections in case their server infrastructure is what is deciding it's taking too long and drops the connection. Let me know and thanks.

Hi Eric,

      BeforeRequest event not raised when fiddler using with selenium(chrome webdriver).

     Coded as follows


               CONFIG.bCaptureCONNECT = true;
            CONFIG.IgnoreServerCertErrors = true;
            CONFIG.bMITM_HTTPS = true;
           
            FiddlerApplication.BeforeRequest += delegate(Session oSession)
            {
                Console.WriteLine("Request URL {0}", oSession.fullUrl);            
            };
            var cert = InstallCertificate();
            int proxyPort = StartProxy(0);
            OpenQA.Selenium.Proxy proxy = new OpenQA.Selenium.Proxy();
            proxy.HttpProxy = string.Format("127.0.0.1:{0}", proxyPort);
            ChromeOptions options = new ChromeOptions();
            options.Proxy = proxy;

IWebDriver Driver = new ChromeDriver(@"C:\chromedriver_win32", options);
          
            Console.WriteLine("Certificate {0}", cert);
            Driver.Navigate().GoToUrl(<url>);
         
 public static bool InstallCertificate()
        {

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

                if (!Fiddler.CertMaker.trustRootCert())
                    return false;
                X509Store certStore = new X509Store(StoreName.Root, StoreLocation.LocalMachine);
                certStore.Open(OpenFlags.ReadWrite);
                try
                {
                    certStore.Add(Fiddler.CertMaker.GetRootCertificate());
                }
                finally
                {
                    certStore.Close();
                }
            }

            return true;
        }

private static int StartProxy(int desiredPort)
        {   
           FiddlerCoreStartupFlags flags = FiddlerCoreStartupFlags.DecryptSSL & FiddlerCoreStartupFlags.AllowRemoteClients & FiddlerCoreStartupFlags.CaptureFTP & FiddlerCoreStartupFlags.ChainToUpstreamGateway & FiddlerCoreStartupFlags.MonitorAllConnections & FiddlerCoreStartupFlags.CaptureLocalhostTraffic;
           FiddlerApplication.Startup(desiredPort, flags);       
           return FiddlerApplication.oProxy.ListenPort;
        }

Thank you,

Regards,
Avinash.

Hi,

I was wondering if documentation exists for Fiddler's installation exit codes. I am running silent installs on Windows 7-based VDI machines via PowerShell and I'm getting an exit code of 15 intermittently.

If anyone can pass this documentation along, or tell me what exit code 15 signifies, that would be great.
 
Thanks!
Jerry

Hi - I believe I understand how sequential replay works in Fiddler, but what I'm looking for is serial replay.  The case is that I have a single-url API request I'd like to repeat 100 (or 500, etc.) times but not start each request before the previous one's response is complete.  I've found that bulk replay (SHIFT) tends to skew the numbers if I'm testing against a specific server, as it gets busy and slows down requests in later part of bulk load...so initially requests take 100ms, say, but near end of group take many times that number.  This is good to know, but not useful for my purpose in this case.  If there is not a way to do this currently, please make it a feature request.  Thanks!

I want to make a c# console application for intercepting the https connection to a server and return a local xml file as responcemy code is Fiddler.FiddlerApplication.BeforeRequest += delegate(Fiddler.Session oS)
{
if (oS.url.Contains("test.com"))
{
oS.bBufferResponse = true;
oS.utilCreateResponseAndBypassServer();
}
};

Fiddler.FiddlerApplication.BeforeResponse += delegate(Fiddler.Session oS)
{
oS.utilDecodeResponse();
oS.LoadResponseFromFile("file.xml");
};
But it doesn't seem to work, I get connection error. Any ideas?

When there are plenty of requests to the fiddlercore, and i change fullurl to a slow https address, the follow-up requests will block,and BeforeRequest not call.
other HttpClient.SendAsync throw TaskCancelException too.

 I use ilasm open fiddlercore4.dll , find a Socket.Listen(50) in Proxy.Start method, Is the cause of the problem? I export to fiddlercore4.il and change 50 to 99999, but still problem, please help me , thank you .

Can I use the HtmlAgilityPack.dll by treating it as a library as mentioned in the link below ?

     http://docs.telerik.com/fiddler/Extend-Fiddler/UseDotNetInFiddlerScript

I tried following the steps in the link above, but was unable to access the library file.

Any help is appreciated.