Fiddler not working with windows store apps on windows 8.1

10 posts, 0 answers
  1. Anton
    Anton avatar
    3 posts
    Member since:
    Feb 2014

    Posted 12 Feb 2014 Link to this post

    Hi. I use windows 8.1 and need to debug my traffic from winstore apps to remote server. 

    I sucessfully used fiddler for these purposes, but it unexpectedly stopped working.
     
    Now I see next situation: after running fiddler all my winstore apps unable to send data to remote server. 
    From my app I see that after submitting data simply nothing happens. After timeout expired, I get httpexception.

    Of course, I know about windows 8 restrictions for winstore apps regard local traffic. And I've used enable loopback utility for this case. 
    But recently it stopped work with strange behavior: on start app sucessfully got installed applications list, but unable to refresh it. 
    When I press "Refresh" button, I got next error:
    Unable to use NetIsoEnumAppContainers to get AppContainer list.
    Error Code: 0x5

    Attempting manual registry crawl; some information will be unavailable.

    And I unable to see any data from my or installed app. Also any installed app is unable to send and receive any data with runned fiddler. 

     I've tried to uninstall\reinstall fiddler but not helps. Do you know something about this problem? Can you help me to solve it?






  2. EricLaw
    EricLaw avatar
    67 posts
    Member since:
    Oct 2012

    Posted 12 Feb 2014 in reply to Anton Link to this post

    Error code 0x5 is "Access Denied." Are you running the tool as administrator?

    What does "I unable to see any data from my or installed app" mean?
  3. Anton
    Anton avatar
    3 posts
    Member since:
    Feb 2014

    Posted 13 Feb 2014 in reply to EricLaw Link to this post

    Hi Eric. Yes, I run tool as administrator: http://i.imgur.com/BdyB1rb.png

    In fiddler log I don't have any record about winstore apps. And any installed winstore app doesn't have access to internet with enabled traffic capturing in fiddler.
  4. EricLaw
    EricLaw avatar
    67 posts
    Member since:
    Oct 2012

    Posted 13 Feb 2014 in reply to Anton Link to this post

    When you say "don't have any record about winstore apps" I think you're saying that you don't see any rows in Fiddler's Web Sessions list that were sent by a store application? But do those requests actually *succeed* when Fiddler is open? Or do they fail as well?
  5. Anton
    Anton avatar
    3 posts
    Member since:
    Feb 2014

    Posted 13 Feb 2014 in reply to EricLaw Link to this post

    Sorry for bad english, I've learned it with movies and job internal docs :)

    Yes, you right.  Requests generally fails and doesn't appears in web sessions list. It affects only winstore apps. Web browsers works well.

  6. Adrian
    Adrian avatar
    15 posts
    Member since:
    Dec 2011

    Posted 04 Aug 2014 in reply to EricLaw Link to this post

    I am getting a similar error on Windows 8 server.

    Running as admin.

    Always get the attached errors.
  7. Eric Lawrence
    Admin
    Eric Lawrence avatar
    833 posts

    Posted 05 Aug 2014 Link to this post

    Hello, Adrian--

    Unfortunately there is no known fix if Microsoft's API fails. Falling back to the registry crawl (which is what happens after the second message) is the only workaround available. You may need to talk to Microsoft Product Support to get help with this problem in the Windows API or your machine's configuration.

    (As a hacky workaround, you can also disable the Windows Firewall Service (using Services.msc) while testing. It is the firewall service that blocks Windows Store applications from using the Loopback address.)

    Regards,
    Eric Lawrence
    Telerik
     

    Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

     
  8. Adrian
    Adrian avatar
    15 posts
    Member since:
    Dec 2011

    Posted 05 Aug 2014 in reply to Eric Lawrence Link to this post

    Thanks Eric.
  9. Steve
    Steve avatar
    1 posts
    Member since:
    Jan 2015

    Posted 22 Jan 2015 in reply to Eric Lawrence Link to this post

    I'm getting the same errors as Adrian on my new Windows 2012 R2 Azure VM.  However, when I stopped the Windows Firewall service, I lost my RDP session and had to reboot.  Within the firewall, I see an inbound rule for "FiddlerProxy" to allow Fiddler.exe to access all local and remote ports.  Is there an even broader rule I can add to make this work?

    As another possibility, how would I find the Fiddler "AppContainer'sFullName" to try c:\>CheckNetIsolation LoopbackExempt -a as described in http://blogs.msdn.com/b/fiddler/archive/2011/09/14/fiddler-and-windows-8-metro-style-applications-https-and-private-network-capabilities.aspx ?
  10. Eric Lawrence
    Admin
    Eric Lawrence avatar
    833 posts

    Posted 23 Jan 2015 Link to this post

    Hello, Steve--

    Your best bet would be to use Help > Send Feedback to send us a summary of your problem, including screenshots of whatever error messages you're encountering.

    Regards,
    Eric Lawrence
    Telerik
     

    Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

     
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