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Capture traffic from QtWebEngine with Fiddler?

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Quoc
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Quoc asked on 24 Jul 2019, 02:30 PM

I'm using chinese software which is using QtWebEngine but Fiddler is unable to capture anything from it even i selected process to that only. Nothing shows up. HTTPS and certificate enabled and are working perfectly with browsers and other softwares

QtWebEngine is based on chromium and is open source https://wiki.qt.io/QtWebEngine. Fiddler is supossed to capture anything http/s related

The process running is qtwebengineprocess.exe

Anyone know anything about it?

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Eric R | Senior Technical Support Engineer
Telerik team
answered on 26 Jul 2019, 06:04 PM
Hi Dwight,

I am not aware of anything in particular. If I understand correctly, the software runs the QtWebEngine which is a stripped down version of Chromium? If this is the case, there could be something happening between the software and the web engine.

Could you provide more details about how Fiddler is being used in this scenario? Thank you and I look for ward to your reply.

Regards,

Eric R
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Quoc
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answered on 28 Jul 2019, 07:45 PM

Well I just try to see wether it collects sensitive data or not.

If QtWebEngine runs Chromium then fiddler should be able to capture anything from it.

But nothing captured, nor got any certificate errors. I think there is a protection or something that prevent fiddler from capturing

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Eric R | Senior Technical Support Engineer
Telerik team
answered on 29 Jul 2019, 01:08 PM
Hi Quoc,

I agree that I think there may be something blocking Fiddler from capturing any traffic. This could be something proprietary that was built into the application or the web traffic is using HTTPS

Although, in order to understand this I would need the following information. 

1. - The software being used to inspect it's traffic
2. -  The Session Archive Zip (SAZ) file and the Fiddler Log Output.

Once I receive the above information I will be able to investigate more.

Please let me know if you need any additional information. Thank you and I look forward to your reply.

Regards,

Eric R
Progress Telerik
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Eric R | Senior Technical Support Engineer
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