将CefSharp与Owin TestServer一起使用

Question

Due to potential firewall limitations and the need to have many instances of my app that cannot be competing for ports, I would like to use the Microsoft.Owin.Testing.TestServer class to create an in-memory web server that will serve requests to an embedded CefSharp browser (either WPF or Winforms is fine).

I can create the TestServer with no issues. How can I configure the CefSharp WebBrowser control to use that Test Server rather than using the standard OS network stack?

If I was forming my own requests, I would either use the HttpClient provided by the TestServer or create a new HttpClient using the TestServer's handler. Is there any equivalent functionality in CefSharp WebBrowser?

Answer 1

You can intercept requests and fulfill them yourself. If you implement IResourceHandlerFactory then subsequently IResourceHandler (Just return a new instance of your custom IResourceHandler in IResourceHandlerFactory.GetResourceHandler )

https://github.com/cefsharp/CefSharp/blob/cefsharp/45/CefSharp/IResourceHandlerFactory.cs#L22

A new instance of your custom ResourceHandler will be instantiated for every request. It's relatively simple to process the request in an async fashion, just invoke your request in ProcessRequestAsync , when it's complete fill a local stream with the data execute callback.Continue() , return the stream and populate the response in GetResponse . I like to wrap callback in a using statement as it wraps a managed resource and should be explicitly disposed of.

You can see a basic example at https://github.com/cefsharp/CefSharp/blob/cefsharp/45/CefSharp.Example/CefSharpSchemeHandler.cs#L92 (Doesn't make network requests, the principal is the same though)