CoreWebView2WebResourceResponseView.GetContentAsync Method

Definition

Namespace:

Microsoft.Web.WebView2.Core

Assembly:

Microsoft.Web.WebView2.Core.dll

Package:

Microsoft.Web.WebView2 v1.0.2478.35

Gets the response content stream asynchronously.

public System.Threading.Tasks.Task<System.IO.Stream> GetContentAsync ();

member this.GetContentAsync : unit -> System.Threading.Tasks.Task<System.IO.Stream>

Public Function GetContentAsync () As Task(Of Stream)

Returns

Task<Stream>

Exceptions

COMException

The content failed to load.

Examples

ShowNextWebResponse = false;

CoreWebView2WebResourceRequest request = e.Request;
CoreWebView2WebResourceResponseView response = e.Response;

string caption = "Web Resource Response Received";
// Start with capacity 64 for minimum message size
StringBuilder messageBuilder = new StringBuilder(64);
string HttpMessageContentToString(System.IO.Stream content) => content == null ? "[null]" : "[data]";
void AppendHeaders(IEnumerable headers)
{
    foreach (var header in headers)
    {
        messageBuilder.AppendLine($"  {header}");
    }
}

// Request
messageBuilder.AppendLine("Request");
messageBuilder.AppendLine($"URI: {request.Uri}");
messageBuilder.AppendLine($"Method: {request.Method}");
messageBuilder.AppendLine("Headers:");
AppendHeaders(request.Headers);
messageBuilder.AppendLine($"Content: {HttpMessageContentToString(request.Content)}");
messageBuilder.AppendLine();

// Response
messageBuilder.AppendLine("Response");
messageBuilder.AppendLine($"Status: {response.StatusCode}");
messageBuilder.AppendLine($"Reason: {response.ReasonPhrase}");
messageBuilder.AppendLine("Headers:");
AppendHeaders(response.Headers);
try
{
    Stream content = await response.GetContentAsync();
    messageBuilder.AppendLine($"Content: {HttpMessageContentToString(content)}");
}
catch (System.Runtime.InteropServices.COMException)
{
    messageBuilder.AppendLine($"Content: [failed to load]");
}

MessageBox.Show(messageBuilder.ToString(), caption);

Remarks

A null stream means no content was found. Note content (if any) for redirect responses is ignored. This method returns null if content size is more tha 123MB or for navigations that become downloads or if response is downloadable content type (e.g., application/octet-stream). See DownloadStarting event to handle the response. If this method is being called again before a first call has completed, it will complete at the same time all prior calls do. If this method is being called after a first call has completed, it will return immediately (asynchronously).