Hello, With recent updates of fiddler it seems as if there are issues running on Windows server core. (See below for exception from the JIT.) This hasn't always been the case; I have an installer for an older version that runs just fine. Is this a known limitation? any workarounds (besides using an outdated version that I only have access to accidentally)?
Thanks!
Mike
See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.Runtime.InteropServices.COMException (0x80040154): Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
at System.Windows.Forms.UnsafeNativeMethods.CoCreateInstance(Guid& clsid, Object punkOuter, Int32 context, Guid& iid)
at System.Windows.Forms.WebBrowserBase.TransitionFromPassiveToLoaded()
at System.Windows.Forms.WebBrowserBase.TransitionUpTo(AXState state)
at System.Windows.Forms.WebBrowser.get_AxIWebBrowser2()
at System.Windows.Forms.WebBrowser.set_AllowWebBrowserDrop(Boolean value)
at . .() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Report.cs:line 449
at . ..ctor() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Report.cs:line 82
at Fiddler.frmViewer. (Object , EventArgs ) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Viewer.cs:line 9741
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at Fiddler.frmViewer.WndProc(Message& m) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Viewer.cs:line 12356
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2117.0 built by: NET47REL1LAST
CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll
----------------------------------------
Fiddler
Assembly Version: 4.6.20173.38786
Win32 Version: 4.6.20173.38786
CodeBase: file:///C:/Fiddler/Fiddler.exe
----------------------------------------
System
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2114.0 built by: NET47REL1LAST
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Core
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2117.0 built by: NET47REL1LAST
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Windows.Forms
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2114.0 built by: NET47REL1LAST
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2053.0 built by: NET47REL1
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2053.0 built by: NET47REL1
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
Assembly Version: 4.0.0.0
Win32 Version: 4.7.2102.0 built by: NET47REL1LAST
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
Xceed.Zip.v5.4
Assembly Version: 5.4.13572.13590
Win32 Version: 5.4.13572.13590
CodeBase: file:///C:/Fiddler/Xceed.Zip.v5.4.DLL
----------------------------------------
Xceed.Compression.Formats.v5.4
Assembly Version: 5.4.13572.13590
Win32 Version: 5.4.13572.13590
CodeBase: file:///C:/Fiddler/Xceed.Compression.Formats.v5.4.DLL
----------------------------------------
Xceed.FileSystem.v5.4
Assembly Version: 5.4.13572.13590
Win32 Version: 5.4.13572.13590
CodeBase: file:///C:/Fiddler/Xceed.FileSystem.v5.4.DLL
----------------------------------------
Xceed.Compression.v5.4
Assembly Version: 5.4.13572.13590
Win32 Version: 5.4.13572.13590
CodeBase: file:///C:/Fiddler/Xceed.Compression.v5.4.DLL
----------------------------------------
Telerik.Analytics
Assembly Version: 4.0.104.0
Win32 Version: 4.0.104
CodeBase: file:///C:/Fiddler/Telerik.Analytics.DLL
----------------------------------------
************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.
5 Answers, 1 is accepted
Rank 1
I also see this problem with the chocolatey package 'fiddler'.
iwr -useb https://chocolatey.org/install.ps1
choco install -y fiddler
$env:USERPROFILE\AppData\Local\Programs\Fiddler\Fiddler.exe
It worked fine with fiddler4 5.0.20173.50948
It seems that the COMException is thrown when a System.Windows.Forms.WebBrowser control is being set in the Statistics tab of Fiddler. AFAIK, WebBrowser internally is using the COM API of Internet Explorer which is not available for Windows Server Core.
Could you, please, provide me with the version number of Fiddler which works, so that I could compare what have changed.
Hello Stefan,
Could you please, check if v5.0.20173.50948 works when you open the Statistics tab of Fiddler and no sessions are selected in the Session list of Fiddler.
Regards,
Simeon
Progress Telerik
Rank 1
Hello Simeon,
I've downloaded the latest version from your site and tried it in my Vagrant box StefanScherer/windows_2016_docker which is a Server Core edition.
Even at installation time I get an error message, see first screenshot.
After starting Fiddler.exe I see another error. I don't have a chance to enter any GUI/Menus etc.
I should be very easy for you to replicate the problem using a Windows Server Core VM.
With Vagrant it is very simple.
vagrant init StefanScherer/windows_2016_docker
vagrant up
vagrant rdp
then in the cmd prompt install you latest Fiddler version.
Thanks,
Stefan
Thank you for the advice how to reproduce the problem. It was really easy with Vagrant. Both errors - after the installation and during the Fiddler startup, are due to the fact that IE is missing from Server Core and Fiddler depends on it.
If you only want to capture some traffic to inspect it, you could use FiddlerCap. It is a lightweight tool build on top of FiddlerCore, which allows you to capture web traffic, save it into Fiddler .saz file and open it in Fiddler for inspection.
Regards,
Simeon
Progress Telerik
Rank 1