public async Task <string> EnableNetworkEventsAsync()
{
var parameters = new Dictionary <string, object>(); // create empty params list
CdpMsg msg = new CdpMsg("Network.enable", parameters);
string result = await SendCmdAsync(msg).ConfigureAwait(false);
return(result);
}
//public async Task<WebSocketReceiveResult> CloseBrowserAsync()
public async Task <string> CloseBrowserAsync()
{
// close browser
var parameters = new Dictionary <string, object>(); // create empty params list
//CdpMsg msg = new CdpMsg { id = id++, method = "Browser.close", @params = parms };
CdpMsg msg = new CdpMsg("Browser.close", parameters);
string result = await SendCmdAsync(msg).ConfigureAwait(false);
return(result);
}
//public async Task<WebSocketReceiveResult> NavigatePageAsync(string url)
public async Task <string> NavigatePageAsync(string url)
{
// navigate to specified url
var parameters = new Dictionary <string, object>(); // create empty params list
parameters.Add("url", url);
//CdpMsg msg = new CdpMsg { id = id++, method = "Page.navigate", @params = parms };
CdpMsg msg = new CdpMsg("Page.navigate", parameters);
string result = await SendCmdAsync(msg).ConfigureAwait(false);
return(result);
}
//private async Task<WebSocketReceiveResult> SendCmdAsync(CdpMsg msg)
private async Task <string> SendCmdAsync(CdpMsg msg)
{
try
{
using (ClientWebSocket ws = new ClientWebSocket())
{
Log($"CdpClient.SendMsg(): Attempting to send cmd {msg.method}, port is {_chromeDebuggingPort}");
// load config
await CdpConfig.LoadConfigAsync().ConfigureAwait(false);
byte[] receiveBytes = new byte[65536];
var receiveBuffer = new ArraySegment <byte>(receiveBytes);
ws.Options.SetBuffer(65536, 65536); // (receive 64KB, send 64KB)
#if DEBUG
var tokenSource = new CancellationTokenSource(600000); // 10 mins
#else
var tokenSource = new CancellationTokenSource(10000); // 10 secs
#endif
CancellationToken cancellationToken = tokenSource.Token;
Uri wsUri;
if (msg.method.StartsWith("Browser"))
{
wsUri = this.CdpConfig.BrowserWsUri;
}
else
{
wsUri = this.CdpConfig.PageWsUri;
}
Log($"CdpClient.SendMsg(): Attempting to connect to uri {wsUri}, port is {_chromeDebuggingPort}...");
await ws.ConnectAsync(wsUri, cancellationToken).ConfigureAwait(false);
Log($"CdpClient.SendMsg(): ...Connected to to uri {wsUri}, port is {_chromeDebuggingPort}");
string json = Json.Serialize <CdpMsg>(msg);
byte[] bytes = Encoding.UTF8.GetBytes(json);
ArraySegment <byte> sendBuffer = new ArraySegment <byte>(bytes);
Log($"About to send CDP cmd {msg.method} to port {_chromeDebuggingPort}...");
await ws.SendAsync(sendBuffer, WebSocketMessageType.Text, true, cancellationToken).ConfigureAwait(false);
WebSocketReceiveResult result = await ws.ReceiveAsync(receiveBuffer, cancellationToken).ConfigureAwait(false);
Log($"...received CDP result for cmd {msg.method}, result = {Json.Serialize(result)}, port is {_chromeDebuggingPort}");
// retrive result from buffer
if (result.MessageType != WebSocketMessageType.Text)
{
return($"Unexpected message type: {result.MessageType}");
}
string msgText = Encoding.UTF8.GetString(receiveBytes, 0, result.Count);
Log($"{msg.method}(): returned result {msgText}, port is {_chromeDebuggingPort}");
return(msgText);
}
}
catch (Exception ex)
{
Log($"Exception occurred: {ex.ToString()}");
return(null);
}
}