I have a problem. We have app requests header that contains symbols: Ø, ø; Æ, æ; Å, å. And when Fiddler this request I see in and see this in Inspectors in Fiddler:

Header: �rdal

 

How fix it?

Hi:

     I've been through this link(https://www.telerik.com/forums/how-to-send-multiple-requests-sequentially-using-fiddler-script) to know how to send multiple  HTTP requests using fiddler script.

     I want to know, how to use the script to resend if it's the websocket message.

     And another question, Does fiddler support to intercept and modify the websocket information if I don't use the script?

Any suggestions?

Hi,

Does anybody succeed to see Apple Music requests on the Android Application ?

I have no issue with HTTPS on many apps (already installed certificate on my android test mobile) also installed Xposed Framework to trying to remove SSL pinning but nothing to do... I can't see nothing.

Help really appreciated.

Could anybody please help me with the following issues of FiddlerCore?

I'm evaluating it for our use in products and have built a C# program to test it on win7 32/64 bit and Win10 64bit. It's based on the reference code from https://github.com/RickStrahl/WestWindWebSurge/blob/master/WebSurge/FiddlerCapture.cs but simplified with just hook up to BeforeRequest and BeforeResponse.

1. Memory leak - after processing 674 HTTP/HTTPS requests, Task Manager shows that my program uses 139MB memory. VS2017's Performance Profiler shows multiple memory allocation inside FiddlerCore which seem never being released.

2. CPU spike - in a win7 64bit environment, it consistently gives 80+% CPU usage.

3. Certificate installation does not always happens. Sometimes it seems that CertMaker.rootCertExists() or other related functions do not work correctly and the pop-up dialog is not shown.

4. I call "FiddlerApplication.Startup(8888, true, true, true);" to set Fiddler as the system-wide proxy. But the FidllerCore's log complains that "AutoProxy failed. Disabling for this network." Is it an issue here?

I'm using 4.6.20172.35715 and the above issues happen on both .net 2 and .net 4 libs.

Also, is there a doc for the interfaces and parameters, especially for the troubleshooting and performance tuning? Thanks.

When I go into settings and clicks on the "Decrypt HTTPS traffic" checkbox, Fiddler freezes and nothing happens no matter what I do. I am using v4.6.20172.34691 but I've tried with the newest version too, which has the same problem. It used to work last time I used it, and before i upgraded to the newest version. And there is no crash, it just freezes.

Hi, 

I'm trying to setup fiddlercore to accept remote connections on port 80 and 443 then act as a proxy to incoming connections - without being configured as the system proxy on the client machine. Similar to how Squid can be configured in transparent mode. So far I've tried a number of variations on the below with no luck. 

                    FiddlerApplication.Startup(3145, false, false);
                    var altEndPoint = FiddlerApplication.CreateProxyEndpoint(80, true, "*");
                    altEndPoint.Attach();
                    var oSecureEndpoint = FiddlerApplication.CreateProxyEndpoint(443, true, "*");
                    oSecureEndpoint.Attach();

Is what I'm trying to do doing possible, would really appreciate any pointers!

I've started hitting a lot of Out Of Memory issues in Fiddler over the last few months.  After seeing this, I realized that my problems coincided with upgrading to the latest version (v5) when Fiddler started being a 32-bit only application.  It would be really nice if we could get a new 64-bit compatible release of Fiddler.

As a temporary workaround, I've set the 'number of sessions to keep' option really low and that has helped but that starts impacting the usability of the tool and still doesn't solve it completely.

Hi,

is it possible to capture localhost (client and server on the same box) websockets communication? I tried using what you suggested to capture local http/https traffic but it is not applicable to websockets.

 

Thanks,

Eli

Hello Telerik team,

I've downloaded a free version of FiddlerCore and run demo project just to try it. This is really cool API!

So, I plan to use it in a .net project for automation testing but I would like to clarify a couple of questions before using it:

1. Are there any limitations on a free license of FiddlerCore for using it in the automation testing project? Could automation testing project mean like an internal business application? My project is a .net project (c#) which is not distributable within my company, it is not used as a commercial product and it is not distributed to our end customers. It is used only in CI/CD pipeline but it is not an educational project.
2. Is there any difference in the functionality of FiddlerCore free and commercial licenses? Are there any limitations on the features of FiddlerCore free license?
3. As far as I understand a commercial license is per application for 1 year but on all products page, it says that license is per developer. Please confirm the correct one option.

Thank you and best regards,

Dmytro

 

Hi,

 

I have been using Fiddler for several years now and one thing has consistently bothered me.  Whenever I add a filter, say, "Show only processid X", it will filter out everything else. So far so good.  However, if something new comes in (usually visual-studio related) that wasn't on-screen prior to the filter it isn't filtered.

 

Here are some reproduction steps to see what I mean:

 

* Open Fiddler.

* Use Composer to write up a post against a local dev API endpoint.

* Wait for other items to show up (via browser, VS, etc.)

* Right-Click the Fiddler post and choose "Show only Process = x"

* Watch everything but that process filter out.

* Wait a few moments.

* In my dev environment, new things keep cropping up.

 

I have included a screenshot showing that a filter is active, with a new instance of svchost showing up after the filter was applied.  Is there some way that I can tell Fiddler to apply my filter to any future traffic in this session and not just previous traffic?