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?

Is there a keyboard shortcut to scroll the session list to the currently selected/open session you're working on?

This would be very useful to not have to scroll the session list manually looking for the highlighted session you're on, particularly if you've lost track of whether you're above or below that session as you jump around investigating surrounding/later/earlier sessions for context.

Thanks!

I look fiddlercore demo ,there some code I don't understand , why when FiddlerApplication.Startup after , and also CreateProxyEndpoint ?

 

I test it ,if don't CreateProxyEndpoint ,the fiddler can still work

Hello, I'm a new user.

I've been using the hostname replacement using fiddler.

I was trying to update my Qt installation but the maintenance tool was defaulting downloads from slow mirrors. I was changing the hostname to faster mirrors.
The hostname replacement was working and the download speeds are improved (task manager shows Fiddler maxing the download speeds).

The problem is fiddler keeps spamming the link (see first attached picture) and even if one of them finishes downloading, it says that the session was aborted so the qt maintenance tool doesn't get the requested file and it gets stuck in a loop.

This only happens when it's downloading a big file. Small files (<10MB) gets confirmed to be downloaded in the qt maintenance tool.

I think it is because since the smaller files downloads right away, it gets registered as a response on the qt maintenance tool before it requests for another but since the bigger files are slower to download, the tool doesn't get a response right away so it spams requests, when the earlier requests finish downloading, the tool doesn't accept it. So the result is Fiddler keeps spamming requests even if the earlier request finish downloading.

How do I fix this?