Unplanned
Last Updated: 14 Nov 2019 15:40 by ADMIN
Created by: Antonio
Comments: 3
Type: Bug Report
4

Fiddler crashes sometimes with this message:

No se puede obtener acceso al objeto desechado.

Nombre del objeto: 'WinHttpAutoProxy'.

Type: System.ObjectDisposedException
Source: Fiddler
   en “.Ÿœ.ƒ•(String •, String& ‘‰, String& ”) en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\FiddlerCore\PlatformExtensions\Windows\FiddlerCore.PlatformExtensions.Windows.Shared\WinHttpAutoProxy.cs:línea 52
   en .‚•.œ(String –, IPEndPoint& žœ) en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\AutoProxy.cs:línea 142
   en Fiddler.Proxy.FindGatewayForOrigin(String sURIScheme, String sHostAndPort) en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\Proxy.cs:línea 805
   en Fiddler.ServerChatter.Œ() en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\ServerChatter.cs:línea 1056
   en Fiddler.ServerChatter.‹Œ(AsyncCallback ŒŒ) en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\ServerChatter.cs:línea 932
   en Fiddler.Session.‘() en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\Session.cs:línea 3638
   en Fiddler.Session.œ™(IAsyncResult Œ) en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\Session.cs:línea 3649
   en Fiddler.ServerChatter.ŽŒ() en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\ServerChatter.cs:línea 1518
   en Fiddler.ServerChatter.Œ() en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\ServerChatter.cs:línea 1472
   en Fiddler.ServerChatter.‹Œ(AsyncCallback ŒŒ) en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\ServerChatter.cs:línea 932
   en Fiddler.Session.‘() en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\Session.cs:línea 3638
   en Fiddler.Session.(Object ) en C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\Session.cs:línea 3426

Fiddler v5.0.20173.50948 (x86 x86) [.NET 4.0.30319.42000 on Microsoft Windows NT 6.1.7601 Service Pack 1] 

Completed
Last Updated: 07 Oct 2019 10:53 by ADMIN
Created by: Eric
Comments: 6
Type: Bug Report
4

Fiddler's "Web Browsers" filter does not include msedge.exe as a web browser. This is the executable name of the new Chromium-based version of Edge that Microsoft is now working on.

This should be a one-line fix and very much appreciated by the many thousands of Fiddler+Edge users.

Pending Review
Last Updated: 11 Apr 2019 13:02 by ADMIN

This is a copy of Fiddler's new Feedback Portal not working properly submitted to the Fiddler groups forum:

I have submitted probably a dozen or two bugs to the Fiddler Feedback portal https://fiddler.ideas.aha.io/ideas . Fiddler recently changed the feedback portal software and attempted to import all existing bugs. The import was not done properly. Every bug I reported the old links do not redirect to the imported reports. If I search for a report by title only arbitrary comments of the reports are included. There are no screenshots or attachments. Also I cannot login to the portal with my yahoo account, it says "Oh, no! Something's not right, but we're sorting it out." I was able to salvage some of what I reported from screenshots of the old site but I don't remember all of what I reported. Please retry the import so what users reported remains open for discussion and fixing. One particular bug is really a nuisance and hasn't been fixed when I have one session open raw in inspector and I click on another session I have to wait a long time. I don't remember what bug I filed over it but I know I filed something.

(Since the original post I have been able to login with my yahoo account. It does not show any bugs for my e-mail and they're still broken missing content and comments as "Imported User")

 

Pending Review
Last Updated: 01 Feb 2019 16:12 by Eric
Created by: Ahsen
Comments: 2
Type: Bug Report
2

Hello,

I am getting the following error in fiddler and without Capture HTTPS CONNECTs it works, also in the Protocols I have enabled: <client>;ssl2;ssl3;tls1.0;tls1.1;tls1.2

fiddler.network.https> HTTPS handshake to <domain> (for #6) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The message received was unexpected or badly formatted

Win32 (SChannel) Native Error Code: 0x80090326

Ashen

[Edited by Telerik Staff to remove personal information and convert to bug report]

Completed
Last Updated: 03 Oct 2019 12:11 by ADMIN

 

I'm trying many times this shortcut but it's doesn't work. When i'm try to copy Single Header with CTRL + C it's work but when i'm try to copy single header's value with CTRL + SHIFT + C shortcut it's didn't work.

Unplanned
Last Updated: 03 Dec 2019 21:23 by Wojciech Rajchel
Created by: Wojciech Rajchel
Comments: 2
Type: Bug Report
2

Describe the bug
After following the steps in the Capture All IIS Traffic on the Web Server Forum Post Fiddler goes into an endless loop.

image

To Reproduce
Steps to reproduce the behavior:

  1. Disable the firewall on the IIS Web Server

  2. Edit machine.config proxy settings to point to 127.0.0.1:8888

    <system.net>
        <defaultProxy>
            <proxy autoDetect="false" bypassonlocal="false" proxyaddress="http://127.0.0.1:8888" usesystemdefault="false" />
        </defaultProxy>
    </system.net>
  3. Set the WinHTTP Proxy Settings to point to 127.0.0.1:8888
    netsh winhttp set proxy 127.0.0.1:8888

  4. Change the IIS Site Bindings to an alternate Port. In this example, it is 8080
    IIS Bindings

  5. In Fiddler, execute !listen 80 in QuickExec
    Fiddler QuickExec

  6. Add Custom Rule to Forward Requests Received to WinHTTP Port. In this case, 8080

    static function OnBeforeRequest(oSession: Session) {
        
        // ...Code removed for brevity...
        if(oSession.host == "[INSERT_HOST_NAME_HERE].com:80")
        {
            oSession.host = "[INSERT_HOST_NAME_HERE].com:8080"  /// This is the Fiddler Port
        }
        
        // ...Code removed for brevity...    
    }

Expected behavior
Fiddler should capture all traffic to and from the web server. This configuration should configure Fiddler as both the normal proxy and reverse proxy simultaneously.

Desktop (please complete the following information):

  • OS: Windows Server 2012 R2
  • Browser: Any
  • Version: Any
Unplanned
Last Updated: 16 Jul 2019 07:40 by ADMIN

Repro steps:

1. Inspect a websocket connections traffic

2. Expand the preview column so that the message body should show more than 65 characters.

3. Observe that even though the column is wide enough to support more than 65 characters, only 65 characters are displayed.

Unplanned
Last Updated: 10 Dec 2019 07:27 by ADMIN

When HTTPS decryption is enabled in Fiddler, Fiddler parses the ClientHello and ServerHello HTTPS messages to determine the supported ciphers and other information, including TLS Extensions.

Unfortunately, Fiddler's HTTPSMessages parsers have a bug whereby if the extensions are larger than the available data on the stream/pipe, reading of the extensions is skipped and misleading text suggesting that no extensions were sent is shown in the Inspectors. For instance, the current version of Chrome Canary sends ~1308 bytes of TLS extensions in the ClientHello, but only 908 bytes are available at the time that the message is read. Fiddler claims that the ClientHello contained no extensions. 

Instead of performing a single .Read() call and ignoring the result if the size is less than expected, Fiddler should continue to read the stream until the promised number of bytes have been read.

 

[This issue is similar to https://crbug.com/1028602#c2, although the implementation is obviously unrelated).

Pending Review
Last Updated: 16 Dec 2019 19:51 by Eric

 

 

 

(Some blocking rules are not shown)

 

When I use the "filter now" function, it does not filter properly.

It goes like this:

Prior to this, I used the "Filters" feature, but there was always a link that was not blocked.(this url: https://watson.telemetry.microsoft.com/Telemetry.Request  )

With the "Filters" function turned on, I used the "Filter now" function several times to block this link, but the result was only blocked at that time, and then came out again.

Now I turn off the "Filters" function, and then use "Filter now" to block that link. As a result, the blocking rule is not displayed in the lower left corner. Other blocking rules can be displayed normally.

 

 

Declined
Last Updated: 11 Nov 2019 07:12 by ADMIN
Unplanned
Last Updated: 06 Nov 2019 01:28 by S
Scheduled for Fiddler for Windows vNext

Once a program has been "Filter now"ed via the context menu, if that filter is later deleted from down bottom, that program can no longer be "Filter Now"ed again; nothing happens.

It's as if program filtering is only given one opportunity to be "Filter Now"ed. Once that's happened, even if they filter gets deleted, the program isn't given another opportunity to be Filter Now'ed.

Declined
Last Updated: 18 Nov 2019 08:37 by ADMIN

I'm using Fiddler [Oct-03-19] v5.0.20194.41348 on Windows 7 Enterprise. There's no way to disable the 'Get Started' panel on startup. 'Show on startup' is not checked but it still shows. Also it doesn't look very good. Also it downloads javascript and other stuff via http unencrypted from fiddler.com, and I'd like to stop that.

 

Pending Review
Last Updated: 22 May 2019 20:35 by Jonathan
Created by: Jonathan
Comments: 3
Type: Bug Report
1

Hi,

My windows DPI scaling is set to 200%, as my resolutions to 2000x3000.

If I load fiddler normally, I see the following blurry text.

https://imgur.com/hloHTfe

 

 

So i saw this bug report, https://feedback.telerik.com/fiddler/1361354-hope-the-fiddler-can-support-the-high-dpi-screen which suggested to load up fiddler with -dpiaware, and now some text is better, but most of the tabs and buttons are incorrect sizes in the composer. In my opinion its more usable with the blurry text. I also tried to change the Fiddler.exe.config - EnableWindowsFormsHighDpiAutoResizing from true to false, but the only affect this had was to change the size of the mouse cursor.

https://imgur.com/qeBOZk3

 

Any ideas on something else to try, or is this a limitation of Fiddler / .Net WinForms.

Pending Review
Last Updated: 31 May 2019 11:43 by ADMIN
Created by: James
Comments: 3
Type: Bug Report
1

It's incredibly an annoying prompt that occurs every. single. time. i open up fiddler.

 

Check for updates behind the scenes if an update exists and only let me know when an update exists

Pending Review
Last Updated: 23 Aug 2019 13:15 by Gary

Hi,

I have a connectivity issue when I run Fiddler (Progress Telerik Fiddler Web Debugger). I work behind a corporate proxy server and the server IP is changed every few hours. The change in IP is normally okay, but when I am running Fiddler with the 'Automatically Authenticate' option enabled, then Fiddler shows an error every time the proxy is changed; it shows a yellow error message suggesting "The system proxy was changed. Click to reenable capturing".

Clicking on the error in Fiddler works fine and it reconnects, but I find this frustrating because if i don't realise there was an error in fiddler and don't click it immediately then it affects my connectivity and some activities on my pc start to fail without me realising.

My suggestion is that you should let Fiddler auto-reconnect when this type of proxy change happens and when the 'Automatically Authenticate' option is enabled. I know it can't try to reconnect forever because it will cause an endless cycle for other people who have other types of proxy disconnects, but in my case it would be very helpful to let fiddler at least try once to auto reconnect (for me 1 retry is usually fine and Fiddler is able to connect to the new proxy address, but perhaps you can let the number of retries be a menu option so that users can set the number of retries that they want Fiddler to do after there was a proxy change or proxy error).

 

Thanks so much for your work, I really like Fiddler!

I hope you can bug fix this or add it as a feature, it will be very helpful!

Regards,

Eugene

Unplanned
Last Updated: 17 Sep 2019 07:25 by ADMIN
Created by: Lesences
Comments: 2
Type: Bug Report
1

Hi sir,

     I am an android developer from China, I really like to use Fiddler.But today,when I try to download it, I find avery serious error that Taiwan and Hong Kong are in the 'Country' option. Everyone knows that Taiwan and Hong Kong are part of China,please  add '-China' behind them,thanks.

     Or just like Oracle ,the picture below is a screenshot of my from Oracle.

     I will follow this thing! :)

 

 

     

Pending Review
Last Updated: 01 Feb 2019 09:37 by sim

Some responses can not be shown in fiddler,for example,i am analysising the package of 植物大战僵尸2(pvz2) for ios.it shows "400 .net error response headers...",but other app like burpsuite can deal with it well...

 

so i've to set the proxy of iphone to "192.168.1.2:8080" and the gateway of fiddler to "127.0.0.1:8888" where burp listens, then fiddler works ok...but it's also too complicated.

 

thx for your reply...(may u have a try?)

Pending Review
Last Updated: 26 Dec 2018 03:30 by Eric

执行“bpu xxx”请求断点后,AutoTamperRequestBefore(Session oSession)方法里oSession.oFlags.ContainsKey("x-breakrequest")=false。

但是执行“bpa xxx”响应断点后,AutoTamperResponseBefore(Session oSession)方法里oSession.oFlags.ContainsKey("x-breakresponse")=true。

Unplanned
Last Updated: 31 Oct 2019 09:31 by ADMIN

"Target Any Process" feature no longer working with Chrome. It used to work but no longer works specifically with Chrome. Still works with other processes. Capturing still works with Chrome as long as I am not using the "Target Any Process" feature.

Pending Review
Last Updated: 26 Mar 2019 12:56 by ADMIN
Created by: Ravindhranad
Comments: 1
Type: Bug Report
0
I have Windows UWP app called HP Smart downloaded from Microsoft Store. When I enabled HP Smart application using Win Config menu and later I have enabled HTTPS traffic. After that I have started HP Smart application. But I see traffic from app as tunnel.. but app is not receiving any responses from the servers. I have exported the capture, please help me to fix this issue. Please notice packet no.2, I am not able to get any response. But if I stop fiddler then HP Smart App is able to communicate and get the data response for this request.
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