private Task SendMessage(byte[] message, CancellationToken cancellationToken)
{
if (_refreshServer is null)
{
return(Task.CompletedTask);
}
return(_refreshServer.SendMessage(message, cancellationToken));
}
public async ValueTask ProcessAsync(DotNetWatchContext context, CancellationToken cancellationToken)
{
if (_suppressLaunchBrowser)
{
return;
}
if (context.Iteration == 0)
{
_reporter = context.Reporter;
if (CanLaunchBrowser(context, out var launchPath))
{
context.Reporter.Verbose("dotnet-watch is configured to launch a browser on ASP.NET Core application startup.");
_canLaunchBrowser = true;
_launchPath = launchPath;
_cancellationToken = cancellationToken;
_refreshServer = new BrowserRefreshServer(context.Reporter);
var serverUrl = await _refreshServer.StartAsync(cancellationToken);
context.Reporter.Verbose($"Refresh server running at {serverUrl}.");
context.ProcessSpec.EnvironmentVariables["DOTNET_WATCH_REFRESH_URL"] = serverUrl;
context.ProcessSpec.OnOutput += OnOutput;
}
}
if (_canLaunchBrowser)
{
if (context.Iteration > 0)
{
// We've detected a change. Notify the browser.
await _refreshServer.SendMessage(WaitMessage, cancellationToken);
}
}
}
internal static async ValueTask TryHandleFileAction(BrowserRefreshServer browserRefreshServer, FileItem fileItem, CancellationToken cancellationToken)
{
var filePath = fileItem.StaticWebAssetPath;
var bytesToRent = UpdateCssMessageLength + Encoding.UTF8.GetMaxByteCount(filePath.Length);
var bytes = ArrayPool <byte> .Shared.Rent(bytesToRent);
try
{
UpdateCssMessage.CopyTo(bytes.AsSpan());
var length = UpdateCssMessageLength;
length += Encoding.UTF8.GetBytes(filePath, bytes.AsSpan(length));
await browserRefreshServer.SendMessage(bytes.AsMemory(0, length), cancellationToken);
}
finally
{
ArrayPool <byte> .Shared.Return(bytes);
}
}