Intercept request, modify Referer

[Kumhy]

<img src="https://www.xxx.com/aaa.jpg"/> This picture link verifies Referer, I want to add Referer to the request header when loading this image. What should I do?

[mattkol]

@Kumhy

Setting referrer is not a straightforward thing to do.

I have 2 approaches that could help.

1. Using the release nuget version 5.1.86: You need to create a custom CefResourceRequestHandler and assign in custom CefRequestHandler but even at that you need to create a custom CefResourceHandler to have access to it.

https://github.com/chromelyapps/Chromely/blob/63e25aa1e46157587b855c03cc160941f5c8eac5/src/Chromely/Browser/Handlers/DefaultRequestSchemeHandler.cs#L45

    public class CustomRequestHandler : DefaultRequestHandler
    {
        public CustomRequestHandler(IChromelyConfiguration config, IChromelyCommandTaskRunner commandTaskRunner, IChromelyWindow window)
            : base(config, commandTaskRunner, window)
        {
        }

        protected override CefResourceRequestHandler GetResourceRequestHandler(CefBrowser browser, CefFrame frame, CefRequest request, bool isNavigation, bool isDownload, string requestInitiator, ref bool disableDefaultHandling)
        {
            return new CustomResourceRequestHandler();
        }
    }

    public class CustomResourceRequestHandler : CefResourceRequestHandler
    {
        protected override CefCookieAccessFilter GetCookieAccessFilter(CefBrowser browser, CefFrame frame, CefRequest request)
        {
            return null;
        }

        protected override CefReturnValue OnBeforeResourceLoad(CefBrowser browser, CefFrame frame, CefRequest request, CefRequestCallback callback)
        {
            request.SetReferrer("http://google.com", CefReferrerPolicy.Default);
            return CefReturnValue.Continue;
        }
    }

    public class DemoApp : ChromelyBasicApp
    {
        public override void ConfigureServices(IServiceCollection services)
        {
            base.ConfigureServices(services);
               -----
           services.AddSingleton<CefRequestHandler, CustomRequestHandler>();
        }
    }

2. I made it a bit simpler with what is in the master branch. a. Create a custom CefResourceRequestHandler

   public class CustomResourceRequestHandler : CefResourceRequestHandler
   {
       protected override CefCookieAccessFilter GetCookieAccessFilter(CefBrowser browser, CefFrame frame, CefRequest request)
       {
           return null;
       }
   
       protected override CefReturnValue OnBeforeResourceLoad(CefBrowser browser, CefFrame frame, CefRequest request, CefRequestCallback callback)
       {
           request.SetReferrer("http://google.com", CefReferrerPolicy.Default);
           return CefReturnValue.Continue;
       }
   }

   b. Register the custom CefResourceRequestHandler

    public class DemoApp : ChromelyBasicApp
    {
        public override void ConfigureServices(IServiceCollection services)
        {
            base.ConfigureServices(services);
               -----
           services.AddSingleton<CefResourceRequestHandler, CustomResourceRequestHandler>();
        }
    }

c. Access the referrer in the controller

  private IChromelyResponse GetResource(IChromelyRequest request)
  {
            string referrer = request.Parameters[RequestConstants.Referrer];
  }

[Kumhy]

Thank you for helping me!