public async Task LaunchAndServe(ProcessStartInfo psi, HttpContext context, Func <string, Task <string> > extract_conn_url)
{
if (!context.WebSockets.IsWebSocketRequest)
{
context.Response.StatusCode = 400;
return;
}
var tcs = new TaskCompletionSource <string> ();
var proc = Process.Start(psi);
try {
proc.ErrorDataReceived += (sender, e) => {
var str = e.Data;
Console.WriteLine($"stderr: {str}");
if (str.Contains("listening on", StringComparison.Ordinal))
{
var res = str.Substring(str.IndexOf("ws://", StringComparison.Ordinal));
if (res != null)
{
tcs.TrySetResult(res);
}
}
};
proc.OutputDataReceived += (sender, e) => {
Console.WriteLine($"stdout: {e.Data}");
};
proc.BeginErrorReadLine();
proc.BeginOutputReadLine();
if (await Task.WhenAny(tcs.Task, Task.Delay(2000)) != tcs.Task)
{
Console.WriteLine("Didnt get the con string after 2s.");
throw new Exception("node.js timedout");
}
var line = await tcs.Task;
var con_str = extract_conn_url != null ? await extract_conn_url(line) : line;
Console.WriteLine($"lauching proxy for {con_str}");
var proxy = new MonoProxy();
var browserUri = new Uri(con_str);
var ideSocket = await context.WebSockets.AcceptWebSocketAsync();
await proxy.Run(browserUri, ideSocket);
Console.WriteLine("Proxy done");
} catch (Exception e) {
Console.WriteLine("got exception {0}", e);
} finally {
proc.CancelErrorRead();
proc.CancelOutputRead();
proc.Kill();
proc.WaitForExit();
proc.Close();
}
}
public Task Run(Uri browserUri, WebSocket ideSocket)
{
return(proxy.Run(browserUri, ideSocket));
}