How to intercept HTTP request in WebView2

Question

Hello:
I want to know if I can intercept HTTP request in WebView2. As in Puppeteer, I can intercept HTTP request.
For example, I launched MS Edge browser to visit: https://www.bing.com/
And I input “microsoft” in the search input box, then click search icon, then from network Tab, I can see there are many HTTP requests.
I want to intercept HTTP request which contains the string “https://www.bing.com/search?q=microsoft”
I can’t find any good example on how to do this, or if it is possible now?
Thanks,

Answer 1

Hi @john zyd ,

I think, this JS can return the results correctly by using Fetch API, and work in dev-tools, but fail when returning the result by using ExecuteScriptAsync() function in C#.

This should be related to the encoding. As you can see the Remarks for ExecuteScriptAsync() function: “If the result is undefined, contains a reference cycle, or otherwise is not able to be encoded into JSON, the JSON null value is returned as the null string.”

I suggest you can also start a new thread(send a feedback) here: GitHub MicrosoftEdge/WebView2Feedback – Issues.

Best Regards,
Tianyu

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Answer 2

You can just use any debugging proxy like Fiddler2. AFAIK WebView2 will use whatever proxy the Chromium based Edge configured to use.

Alternatively see here on how to configure it with code (WPF version of WebView2 only, seems no way for WinForm version yet).