public DevToolsCallCompletionSource(ConvertUtf8BufferToObjectDelegate convertDelegate)
#if !NET45
: base(TaskCreationOptions.RunContinuationsAsynchronously)
#endif
{
_convertDelegate = convertDelegate;
}
private DevToolsCallCompletionSource RemoveOrAddTaskSource(int messageId, ConvertUtf8BufferToObjectDelegate convert)
{
DevToolsCallCompletionSource m;
lock (SyncRoot)
{
if (!_waitTasks.Remove(messageId, out m))
{
m = new DevToolsCallCompletionSource(convert);
_waitTasks.Add(messageId, m);
}
}
return(m);
}
private static async Task<object> ExecuteDevToolsMethodInternalAsync(IChromiumWebView webview, string method, CefDictionaryValue parameters, ConvertUtf8BufferToObjectDelegate convert, CancellationToken cancellationToken)
{
CefBrowser browser = webview.BrowserObject;
if (browser is null)
throw new InvalidOperationException();
cancellationToken.ThrowIfCancellationRequested();
CefBrowserHost browserHost = browser.Host;
DevToolsProtocolClient protocolClient = GetProtocolClient(browserHost);
await CefNetSynchronizationContextAwaiter.GetForThread(CefThreadId.UI);
cancellationToken.ThrowIfCancellationRequested();
int messageId = browserHost.ExecuteDevToolsMethod(protocolClient.IncrementMessageId(), method, parameters);
protocolClient.UpdateLastMessageId(messageId);
DevToolsMethodResult r;
if (cancellationToken.CanBeCanceled)
{
Task<DevToolsMethodResult> waitTask = protocolClient.WaitForMessageAsync(messageId, convert);
await Task.WhenAny(waitTask, Task.Delay(Timeout.Infinite, cancellationToken)).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
r = waitTask.Result;
}
else
{
r = await protocolClient.WaitForMessageAsync(messageId, convert).ConfigureAwait(false);
}
if (r.Success)
return r.Result;
CefValue errorValue;
if (r.Result is byte[] buffer)
errorValue = CefApi.CefParseJSONBuffer(buffer, CefJsonParserOptions.AllowTrailingCommas);
else
errorValue = CefApi.CefParseJSON(r.Result as string, CefJsonParserOptions.AllowTrailingCommas);
if (errorValue is null)
throw new DevToolsProtocolException($"An unknown error occurred while trying to execute the '{method}' method.");
throw new DevToolsProtocolException(errorValue.GetDictionary().GetString("message"));
}
/// <summary>
/// Returns Task.
/// </summary>
/// <param name="messageId">Message ID.</param>
/// <param name="convert">By default, the result is copied to a byte array.</param>
/// <returns></returns>
public Task <DevToolsMethodResult> WaitForMessageAsync(int messageId, ConvertUtf8BufferToObjectDelegate convert)
{
return(RemoveOrAddTaskSource(messageId, convert).Task);
}
