Hi, Ive used Fiddler web debugger to extract information from a website. Ive done it multiple times with success.

(note the website is FLASH)

However today it (the website) just "stops".  Fiddler seems to be going, ive checked my firewall (zonealarm) and Fiddler has the green-light to proceed.

 

if i use the website WITHOUT Fiddler - it works OK, no problems..  But when i try turning fiddler ON, the website stops going. *NO* errors, or warnings or anything..  it just stops.. - it looks like a 'waiting' sign - waiting for the server to respond..   BUT - after 5, 10 minutes, its still waiting..  

If i stop fiddler & refresh the website - It loads up within 1-2 seconds... 

 

Progress Telerik Fiddler Web Debugger

v5.0.20202.18177 for .NET 4.6.1
Built: Tuesday, April 14, 2020

64-bit AMD64, VM: 117.0mb, WS: 161.0mb
.NET 4.8 WinNT 10.0.18362.0

You've run Progress Telerik Fiddler: 122 times.

Running on: new1ab:8888
Listening to: All Adapters
Gateway: No Gateway

Copyright ©2003-2020 Progress Software Corporation. All rights reserved.

 

 

Every time Fiddler encounters a certificate error it prompts me on whether to ignore the error and proceed or not.

I know I can go into Tools --> Options --> HTTPS --> and check Ignore Server Certificate errors (unsafe) - but that is the opposite of what I want to do.

 

I want to NOT proceed for all certificate errors without being prompted. Is there a way to accomplish this?

For various reasons in our environment I encounter a lot of certificate errors and I never want to proceed on them and clicking "No" through dozens of ignore certificate error? is tiresome.

         I developed a fiddler extensions to decrypt the response,but if i changed a response when in the process of debugging,clicked the  button of "run to Completion",the app client still received the unchanged response.

         In the code ,I implemented three Interceptors, Inspector2, IResponseInspector2 and  IBaseInspector2,but I found that when I click the "run to Completion",my program still on the breakpoint and the App has received the response.

         I also fund a problem，when  i return a fixed response in the code,and debug it in fiddler  ,if i didn't change the response ,the app received the fixed return.but if I changed the response ，the APP received the original response.

         So how to catch the response before the app received it after clicked the button of "run to Completion" and make it works.hope somebody can help me,thanks very much.

Hello,

I recently installed Fiddler on my Windows 10 Machine to trace the networking requests of my ASP.Net application.
I enabled HTTPS decryption and allowed trusted certs as prompted.

 

The problem - 

It worked fine, however, Visual studio is now unable to access the internet. More specifically, I get this error [nuget.org] Unable to load the service index for source https://api.nuget.org/v3/index.json.
  The ServicePointManager does not support proxies with the https scheme.
I have tried all of the solutions posted here - https://github.com/NuGet/Home/issues/2880 and here - https://github.com/NuGet/Home/issues/5358

This is not a Visual Studio issue because it has only started to happen when I installed Fiddler.
I have spent about 3 days trying to resolve it.I have tried to undo all of the Fiddler settings, uninstalling it, even uninstalled and installed Visual Studio.
In some random patterns, when I open VS and open Fiddler then I try to restore packages it will work, but only if I open Fiddler. This however does not work majority of the time.

The feature I use and change most often is the Tools--> HOSTS... window for Host Remapping. However the popup dialog window is unfortunately very small, doesn't remember its new size when resizing, and closes itself on save. Further the ctrl-arrow-key movement prefers bigger jumps. 

Is it possible to create an extension that affects this window's default size?
Is it possible to edit/save the contents of the window from another app such as Notepad++?

I've sadly been unable to find much of anything relating to it in the extension creation documentation.

Thanks

Hello, im new here I just wanted to save a specific file with FiddlerScript but it seems not working what did I do wrong ?

 

I'm using Fiddler to analyze an Android app. It communicates with the server through HTTPS, Fiddler has no problems to decrypt the traffc when using its root certificate.But the authentification of the app works using OAuth on a Cloudflare server and it seems to detect Fiddler's root certificate (the MITM).

I need to deactivate Capture HTTPS CONNECTs to make it work - it's not enough to deactivate Decrypt HTTPS traffic.

I wrote a small FiddlerScript, but it also doesn't work, since it deactives the decrypting only, not the capturing. Is there a hack for this?

 

This only occures on some Android apps. Sometime seem to have a weaker setting in Cloudflare and let the Fiddler root certificate pass through.

Is there a way to batch/bulk select sessions that are waiting on breakpoints -- whether request or response -- and then do a bulk "resume" on all of them? Currently, as far as I can see, you have to manually click the resume on each individual session, which can quickly snowball if there are a number of requests to process.

I'm sure I must be overlooking this ability, however, so any help would be much appreciated!

Thanks,

Fiddler works well with many apps on my PC except one that gives me the following message (image attached).

I tried fixiing the errors by clearing and re-installing certificates many times. It doesn't seem to work. If I click yes to the pop-up (in the image I attached), the app internet functionnalities stop working.

 

Did any of you had something similar? How could I fix this?

 

Can we add all the new incoming requests to auto responder automatically?