Is there a way for an HTML-based tab extension to interact with Fiddler's list of sessions?

In file CustomRules.js, I created a new tab ...

 

For those who are not familiar with the above BindUITab feature: The tab returns an HTML-formatted string, which Fiddler then displays in the new tab as if it were a web page.  In my case, the displayed content is derived from the list of selected sessions that are provided by Fiddler as the arrSess function parameter.

I would like the HTML and JavaScript in my tab to affect the sessions in Fiddler's session list.  For example, when the user clicks on a certain part of my HTML, I would like the tab's JavaScript to cause a corresponding session in Fiddler's list to be highlighted.  Is this possible?

Put another way: When the HTML of my new tab is displayed, does Fiddler provide any interface or object to the JavaScript of the tab, so that the tab can interact back to Fiddler?

I love this HTML-based custom tab capability, because it allows my team to quickly and easily customize the tab's functionality for specific situations.  I just wish the tab could talk back to Fiddler ...

I wrote a simple .net windows form program using FiddlerCore (version 4.6.20172.35715)

It has only 2 lines in Form.Load

CONFIG.bEnableIPv6 = False
FiddlerApplication.Startup(8888, 520)

 

I needed a proxy server so I can browse the internet using my home's IP anywhere.

After 3 or 5 days, or even as long as a week, the proxy server stopped responding. If I close the .net program then run it again.

The proxy server works again.

 

Is there anything I could do to prevent this interruption?

This is by far the best proxy server I could find. Please shed some light on.

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