private void Webview_WebResourceRequested(object sender, CoreWebView2WebResourceRequestedEventArgs e)
{
var requestUri = new Uri(e.Request.Uri);
var host = new Uri(requestUri.GetComponents(UriComponents.SchemeAndServer, UriFormat.Unescaped));
if (host != customHost)
{
return;
}
try
{
var contentStream = Application.ContentProvider.GetStreamAsync(requestUri).GetAwaiter().GetResult();
if (contentStream == null)
{
e.Response = webView2Environment.CreateWebResourceResponse(null, 404, "Not Found", string.Empty);
return;
}
var mimeType = Application.ContentProvider.GetMimeType(requestUri);
e.Response = webView2Environment.CreateWebResourceResponse(contentStream, 200, "OK", $"Content-Type: {mimeType}");
}
catch (Exception ex)
{
e.Response = webView2Environment.CreateWebResourceResponse(null, 500, ex.Message, string.Empty);
}
}
private void CoreWebView2_WebResourceRequested(object sender, CoreWebView2WebResourceRequestedEventArgs e)
{
Uri parsedUri = new Uri(e.Request.Uri);
string path;
if (parsedUri.Scheme == "file")
{
path = parsedUri.LocalPath;
}
else if (parsedUri.Scheme == "http" && parsedUri.Host == "make.urlparser.happy")
{
path = parsedUri.LocalPath.TrimStart('/', '\\');
}
else
{
return;
}
var extension = Path.GetExtension(path).ToLowerInvariant();
var mimeMap = new Dictionary <string, string>()
{
{ ".html", "text/html;charset=utf-8" },
{ ".htm", "text/html;charset=utf-8" },
{ ".js", "text/javascript;charset=utf-8" },
{ ".css", "text/css;charset=utf-8" }
};
if (File.Exists(path))
{
e.Response = environment.CreateWebResourceResponse(
new MemoryStream(File.ReadAllBytes(path)),
200, "OK", "Content-Type: " +
(mimeMap.TryGetValue(extension, out string mimeType) ? mimeType : "application/octet-stream"));
}
else
{
string errorMessageTemplate = @"
<h2>Error: 404 Not Found</h2>
<p>Please inform developer with these information.</p>
<hr/>
<table>
<tr><th>Missing Path</th><td>{0}</td></tr>
<tr><th>URL String</th><td>{1}</td></tr>
{2}
</table>
";
var urlParsed = new Uri(e.Request.Uri);
var errorMessage = string.Format(errorMessageTemplate, path, e.Request.Uri,
string.Join("\n", urlParsed.GetType().GetProperties()
.Select(t => string.Format("<tr><th>{0}</th><td>{1}</td></tr>", t.Name, t.GetValue(urlParsed))))
);
e.Response = environment.CreateWebResourceResponse(
new MemoryStream(Encoding.UTF8.GetBytes(errorMessage)),
404, "Not Found", "Content-Type: text/html;charset=utf-8"
);
}
}
private void CoreWebView2_WebResourceRequested(object sender, CoreWebView2WebResourceRequestedEventArgs e)
{
Console.WriteLine(e.Request.Uri);
if (e.Request.Uri == "https://www.gstatic.com/ytlr/txt/licenses_googletv.txt")
{
var stream = GenerateStreamFromString(Resource.Staff.Replace("\n", "\n\u200B"));
e.Response = coreWebView2Environment.CreateWebResourceResponse(stream, 200, "OK", "Content-Type: text/html");
new Thread(() =>
{
Thread.Sleep(3000); // 流资源 3000ms 后释放
var action = new Action(() =>
{
stream.Close();
});
if (InvokeRequired)
{
Invoke(action);
}
else
{
action();
}
}).Start();
}
}
public void SetResponse(Stream content, int statusCode, string statusMessage, string headerString)
{
// NOTE: This is stream copying is to work around a hanging bug in WinRT with managed streams
var memStream = new MemoryStream();
content.CopyTo(memStream);
var ms = new InMemoryRandomAccessStream();
ms.WriteAsync(memStream.GetWindowsRuntimeBuffer()).AsTask().Wait();
_webResourceRequestedEventArgs.Response = _environment.CreateWebResourceResponse(ms, statusCode, statusMessage, headerString);
}
private void HandleWebResourceRequested(object sender, CoreWebView2WebResourceRequestedEventArgs args)
{
var uriString = args.Request.Uri;
var uri = new Uri(uriString);
if (SchemeHandlers.TryGetValue(uri.Scheme, out var handler) && _coreWebView2Environment != null)
{
var responseStream = handler(uriString, out var responseContentType);
if (responseStream != null) // If null, the handler doesn't want to handle it
{
responseStream.Position = 0;
args.Response = _coreWebView2Environment.CreateWebResourceResponse(responseStream, StatusCode: 200, ReasonPhrase: "OK", Headers: $"Content-Type: {responseContentType}{Environment.NewLine}Cache-Control: no-cache, max-age=0, must-revalidate, no-store");
}
}
}
protected virtual Task HandleWebResourceRequest(CoreWebView2WebResourceRequestedEventArgs eventArgs)
{
#if WEBVIEW2_WINFORMS || WEBVIEW2_WPF
// Unlike server-side code, we get told exactly why the browser is making the request,
// so we can be smarter about fallback. We can ensure that 'fetch' requests never result
// in fallback, for example.
var allowFallbackOnHostPage =
eventArgs.ResourceContext == CoreWebView2WebResourceContext.Document ||
eventArgs.ResourceContext == CoreWebView2WebResourceContext.Other; // e.g., dev tools requesting page source
var requestUri = QueryStringHelper.RemovePossibleQueryString(eventArgs.Request.Uri);
if (TryGetResponseContent(requestUri, allowFallbackOnHostPage, out var statusCode, out var statusMessage, out var content, out var headers))
{
var headerString = GetHeaderString(headers);
eventArgs.Response = _coreWebView2Environment.CreateWebResourceResponse(content, statusCode, statusMessage, headerString);
}
#elif WEBVIEW2_MAUI
// No-op here because all the work is done in the derived WinUIWebViewManager
#endif
return(Task.CompletedTask);
}
public void SetResponse(IRandomAccessStream content, int statusCode, string statusMessage, string headerString)
{
_webResourceRequestedEventArgs.Response = _environment.CreateWebResourceResponse(content, statusCode, statusMessage, headerString);
}