Benutzerdefinierte Verwaltung von Netzwerkanforderungen

• CoreWebView2WebResourceRequest-Klasse

• ICoreWebView2WebResourceRequest

• CoreWebView2.AddWebResourceRequestedFilter-Methode

• AddWebResourceRequestedFilter-Methode

// Add a filter to select all resource types under http://www.example.com
webView.CoreWebView2.AddWebResourceRequestedFilter(
      "http://www.example.com/*", CoreWebView2WebResourceContext.All);
webView.CoreWebView2.WebResourceRequested += delegate (
   object sender, CoreWebView2WebResourceRequestedEventArgs args) {
   CoreWebView2WebResourceContext resourceContext = args.ResourceContext;
   // Only intercept the document resources
   if (resourceContext != CoreWebView2WebResourceContext.Document)
   {
      return;
   }
   CoreWebView2HttpRequestHeaders requestHeaders = args.Request.Headers;
   requestHeaders.SetHeader("Custom", "Value");
};

// Add a filter to select all resource types under http://www.example.com
m_webView->AddWebResourceRequestedFilter(
      L"http://www.example.com/*", COREWEBVIEW2_WEB_RESOURCE_CONTEXT_ALL);
m_webView->add_WebResourceRequested(
      Callback<ICoreWebView2WebResourceRequestedEventHandler>(
         [this](
            ICoreWebView2* sender,
            ICoreWebView2WebResourceRequestedEventArgs* args) {
            COREWEBVIEW2_WEB_RESOURCE_CONTEXT resourceContext;
            CHECK_FAILURE(args->get_ResourceContext(&resourceContext));
            // Only intercept the document resources
            if (resourceContext != COREWEBVIEW2_WEB_RESOURCE_CONTEXT_DOCUMENT)
            {
               return S_OK;
            }

            // Set a custom header to the document request.
            wil::com_ptr<ICoreWebView2WebResourceRequest> request;
            CHECK_FAILURE(args->get_Request(&request));
            wil::com_ptr<ICoreWebView2HttpRequestHeaders> headers;
            request->get_Headers(&headers);
            headers->SetHeader(L"Custom", L"Value");
            return S_OK;
         })
         .Get(),
      &m_webResourceRequestedToken);

// Add a filter to select all image resources
webView.CoreWebView2.AddWebResourceRequestedFilter(
      "*", CoreWebView2WebResourceContext.Image);
webView.CoreWebView2.WebResourceRequested += delegate (
   object sender, CoreWebView2WebResourceRequestedEventArgs args) {
    
   // Replace the remote image resource with a local one specified at the path customImagePath.
   // If response is not set, the request will continue as it is.
   FileStream fs = File.Open(customImagePath, FileMode.Open);
   CoreWebView2WebResourceResponse response = webView.CoreWebView2.Environment.CreateWebResourceResponse(fs, 200, "OK", "Content-Type: image/jpeg");
   args.Response = response;
};

// Add a filter to select all image resources
m_webView->AddWebResourceRequestedFilter(
                L"*", COREWEBVIEW2_WEB_RESOURCE_CONTEXT_IMAGE);
m_webView->add_WebResourceRequested(
   Callback<ICoreWebView2WebResourceRequestedEventHandler>(
      [this](
         ICoreWebView2* sender,
         ICoreWebView2WebResourceRequestedEventArgs* args) {
         COREWEBVIEW2_WEB_RESOURCE_CONTEXT resourceContext;
         args->get_ResourceContext(&resourceContext);

         // Replace the remote image resource with a local one specified at the path customImagePath.
         // If response is not set, the request will continue as it is.
         wil::com_ptr<IStream> stream;
         SHCreateStreamOnFileEx(
               customImagePath, STGM_READ, FILE_ATTRIBUTE_NORMAL,
               FALSE, nullptr, &stream);
         wil::com_ptr<ICoreWebView2WebResourceResponse> response;
         wil::com_ptr<ICoreWebView2Environment> environment;
         wil::com_ptr<ICoreWebView2_2> webview2;
         m_webView->QueryInterface(IID_PPV_ARGS(&webview2));
         webview2->get_Environment(&environment);
         environment->CreateWebResourceResponse(
               stream.get(), 200, L"OK", L"Content-Type: image/jpeg", &response);
         args->put_Response(response.get());
         return S_OK;
      })
      .Get(),
   &m_webResourceRequestedToken);

• CoreWebView2.NavigateWithWebResourceRequest(CoreWebView2WebResourceRequest)-Methode

• Interface ICoreWebView2_2::NavigateWithWebResourceRequest-Methode

// This code posts text input=Hello to the POST form page in W3Schools.

// Need to convert post data to UTF-8 as required by the application/x-www-form-urlencoded Content-Type 
UTF8Encoding utfEncoding = new UTF8Encoding();
byte[] postData = utfEncoding.GetBytes("input=Hello");

MemoryStream postDataStream = new MemoryStream(postData.Length);
postDataStream.Write(postData, 0, postData.Length);
postDataStream.Seek(0, SeekOrigin.Begin);

// This acts as a HTML form submit to https://www.w3schools.com/action_page.php
CoreWebView2WebResourceRequest webResourceRequest = 
environment.CreateWebResourceRequest("https://www.w3schools.com/action_page.php",
                                     "POST",
                                     postDataStream,
                                    "Content-Type: application/x-www-form-urlencoded");
webView.CoreWebView2.NavigateWithWebResourceRequest(webResourceRequest);

// This code posts text input=Hello to the POST form page in W3Schools.

// Need to convert post data to UTF-8 as required by the application/x-www-form-urlencoded Content-Type 
std::wstring postData = std::wstring(L"input=Hello");
int sizeNeededForMultiByte = WideCharToMultiByte(
   CP_UTF8, 0, postData.c_str(), postData.size(), nullptr,
   0, nullptr, nullptr);

std::unique_ptr<char[]> postDataBytes = std::make_unique<char[]>(sizeNeededForMultiByte);
WideCharToMultiByte(
   CP_UTF8, 0, postData.c_str(), postData.size(), postDataBytes.get(),
   sizeNeededForMultiByte, nullptr, nullptr);

wil::com_ptr<ICoreWebView2WebResourceRequest> webResourceRequest;
wil::com_ptr<IStream> postDataStream = SHCreateMemStream(
      reinterpret_cast<const BYTE*>(postDataBytes.get()), sizeNeededForMultiByte);

// This acts as a HTML form submit to https://www.w3schools.com/action_page.php
webviewEnvironment->CreateWebResourceRequest(
   L"https://www.w3schools.com/action_page.php", L"POST", postDataStream.get(),
   L"Content-Type: application/x-www-form-urlencoded", &webResourceRequest);
webview->NavigateWithWebResourceRequest(webResourceRequest.get());

WebView.CoreWebView2.WebResourceResponseReceived += CoreWebView2_WebResourceResponseReceived;

// Note: modifications made to request are set but have no effect on WebView processing it.
private async void WebView_WebResourceResponseReceived(object sender, CoreWebView2WebResourceResponseReceivedEventArgs e)
{
    // Actual headers sent with request
    foreach (var current in e.Request.Headers)
    {
        Console.WriteLine(current);
    }

    // Headers in response received
    foreach (var current in e.Response.Headers)
    {
        Console.WriteLine(current);
    }

    // Status code from response received
    int status = e.Response.StatusCode;
    if (status == 200)
    {
        Console.WriteLine("Request succeeded!");

        // Get response body
        try
        {
            System.IO.Stream content = await e.Response.GetContentAsync();
            // Null will be returned if no content was found for the response.
            if (content != null)
            {
                DoSomethingWithResponseContent(content);
            }
        }
        catch (COMException ex)
        {
            // A COMException will be thrown if the content failed to load.
        }
    }
}

COM-Beispiel verwendet ICoreWebView2WebResourceRequest.

EventRegistrationToken m_webResourceResponseReceivedToken = {};

m_webView->add_WebResourceResponseReceived(
    Callback<ICoreWebView2WebResourceResponseReceivedEventHandler>(
        [this](ICoreWebView2* webview, ICoreWebView2WebResourceResponseReceivedEventArgs* args)
            -> HRESULT {
            // The request object as committed
            wil::com_ptr<ICoreWebView2WebResourceRequest> webResourceRequest;
            args->get_Request(&webResourceRequest);
            // The response object as received
            wil::com_ptr<ICoreWebView2WebResourceResponseView> webResourceResponse;
            args->get_Response(&webResourceResponse);
            
            // Get body content for the response
            webResourceResponse->GetContent(
                Callback<
                    ICoreWebView2WebResourceResponseViewGetContentCompletedHandler>(
                    [this, webResourceRequest, webResourceResponse](HRESULT result, IStream* content) {
                        // The response content might have failed to load.
                        bool getContentSucceeded = SUCCEEDED(result);

                        // The stream will be null if no content was found for the response.
                        if (content) {
                            DoSomethingWithContent(content);
                        }
                        
                        return S_OK;
                    })
                    .Get());

            return S_OK;
        })
        .Get(),
    &m_webResourceResponseReceivedToken);

Anfrage:

• CoreWebView2.AddWebResourceRequestedFilter-Methode
• CoreWebView2.NavigateWithWebResourceRequest-Methode
• CoreWebView2.RemoveWebResourceRequestedFilter-Methode
• CoreWebView2.WebResourceRequested-Ereignis
• CoreWebView2Environment.CreateWebResourceRequest-Methode
• CoreWebView2WebResourceContext-Enumeration
• CoreWebView2WebResourceRequest-Klasse
  • Content
  • Headers
  • Method
  • Uri
• CoreWebView2WebResourceRequestedEventArgs-Klasse
  • Request
  • ResourceContext
  • Response
  • GetDeferral

Antwort:

• CoreWebView2.WebResourceResponseReceived-Ereignis
• CoreWebView2Environment.CreateWebResourceResponse-Methode
• CoreWebView2WebResourceResponse-Klasse
  • Content
  • Headers
  • ReasonPhrase
  • StatusCode
• CoreWebView2WebResourceResponseReceivedEventArgs-Klasse
  • Request
  • Response
• CoreWebView2WebResourceResponseView-Klasse
  • Headers
  • ReasonPhrase
  • StatusCode
  • GetContentAsync

Anfrage:

• ICoreWebView2
  • add_WebResourceRequested
  • AddWebResourceRequestedFilter
  • remove_WebResourceRequested
  • RemoveWebResourceRequestedFilter
• ICoreWebView2Environment2
  • CreateWebResourceRequest
• ICoreWebView2WebResourceRequest
  • get_Content
  • get_Headers
  • get_Method
  • get_Uri
  • put_Content
  • put_Method
  • put_Uri
• ICoreWebView2WebResourceRequestedEventArgs
  • get_Request
  • get_ResourceContext
  • get_Response
  • GetDeferral
  • put_Response
• ICoreWebView2WebResourceRequestedEventHandler
  • Invoke

Antwort:

• ICoreWebView2_2
  • add_WebResourceResponseReceived
  • NavigateWithWebResourceRequest
  • remove_WebResourceResponseReceived
• ICoreWebView2Environment
  • CreateWebResourceResponse
• ICoreWebView2WebResourceResponse
  • get_Content
  • get_Headers
  • get_ReasonPhrase
  • get_StatusCode
  • put_Content
  • put_ReasonPhrase
  • put_StatusCode
• ICoreWebView2WebResourceResponseReceivedEventArgs
  • get_Request
  • get_Response
• ICoreWebView2WebResourceResponseReceivedEventHandler
  • Invoke
• ICoreWebView2WebResourceResponseView
  • get_Headers
  • get_ReasonPhrase
  • get_StatusCode
  • GetContent
• ICoreWebView2WebResourceResponseViewGetContentCompletedHandler
  • Invoke