What I am wanting to achieve I think can be done with Fiddler Core, but I am not really a developer, I know enough to modify code and compile it but not to start from scratch.

This is what I want to achieve, I want to listen for a specific URL and POST value, then change the response (which I can do in Fiddler no problem), I want to then compile these settings into a standalone exe with no user interface or options, so i can simply doubel click and have it work on any pc. Since this would seem like a fairly standard use of Fiddlercore, is there a sample project I can download to start me off?

Slightly off topic to the above, rather than wait for the response from the server, can I just respond automatically (maybe add some latency first) and drop the real response if/when it comes?

 

thanks!

 

 

Hi,

 

I'm trying to use Fiddler Everywhere on macOS Mojave (10.14.4) and the proxy does not appear to enable after clicking the Capture button.  When I initially installed Fiddler and opened it, I was prompted for my password (but it still did not appear to be capturing any networking traffic).  I also got the password prompt the first time I closed the app.

 

I have since re-opened the app a few times and tried to click the Capture button, but nothing happens.  I also no longer ever get any password prompts (either on app open/close/capture button click).  I've tried to uninstall + reinstall the app as well with no change in behavior.

 

I also tried to run the app using sudo (using the following command):
sudo /Applications/Progress\ Telerik\ Fiddler.app/Contents/MacOS/Progress\ Telerik\ Fiddler

 

Please find the logs (electon.log and netcore.log) attached.

 

Any idea what might be going wrong?

Thanks

I'd like to be able to decode/inspect websocket messages (messages are 20-byte binary) so that each message can appear in a human readable way.  We basically just want to extend/add a custom websocket inspector which will show the selected message after it's been custom "decoded".  I have purchased Debugging with Fiddler Second Edition, but don't see any guidance for implementing a custom Websockets inspector.

Any guidance would be greatly appreciated!

Thanks!

Jim

When connecting my phone to fiddler, I am able to receive traffic. However, which host do I select to filter so fiddler only shows traffic from my phone? Both AppleDeviceService and YourPhone did not work for me.

Reinstalling without keeping settings did not help. I'm guessing I have something really huge/corrupted in the Composer history. Which file / registry key should I delete?

Thanks!

Hi, i have one problem, i use fiddler every day, and now i have this problem, viz picture, https://ctrlv.cz/qHTh i have this locks, and internet say me your connection is not private, can you help me please? A use for Gaming, I'm desperate

I installed the Fiddler on the Mac.

Following the instructions, when I enter

mono Fiddler.exe

I get the following error message:

-bash: mono: command not found

 

Any ideas?

Thanks,

Michael

I'm use sock from SSH Tunnel Port Forwarding and receive error.

Work basic:

https://i.imgur.com/BwvobUX.png

Don't work with Fiddler:

https://i.imgur.com/Yy6QZWx.png

 

I have a single ADFS server that is part of an Active Directory domain.  I'm having an issue with a Federated application and have turned to Fiddler to troubleshoot (as I have done in the past) and all of a sudden I'm seeing a strange issue that wasn't happening before.

I'm using fiddler on an administration desktop, so I log on with an admin account, this means when I try to use SSO for a federated app, when I hit ADFS it prompt for authentication.  Normally, great no problem, I put in my normal username / password (not the admin account I'm logged on with) it authenticates and off I go to the federated app.  This has been working fine for sometime but then recently its started to fail. It never accepts my username / password, just keeps 401, 401, 401, prompting me for username / password again and again.

I know my username / password are fine as I use them every day to log onto my desktop AND it only fails when I have fiddler open. If I close fiddler, I get prompted, enter my creds and it works fine.

It also doesn't matter what browser I use.

Does anyone know what this is? Or know how I can troubleshoot it / gather more info?

 

Patrick

 

 

 

I'm using jQuery to send cross origin ajax requests and they're working fine in IE11, Chrome and Firefox but they fail in Edge with the following error:

SCRIPT7002: XMLHttpRequest: Network Error 0x80070005, Access is denied.

What's interesting is that I used Fiddler to try to figure out what was going on and when Fiddler is running and capturing requests everything works fine. As soon as I close Fiddler or pause capture it fails again.

I always thought that Fiddler was essentially transparent, with no side effects on client or server, but I guess something different in terms of what the browser receives while Fiddler is running.