public WebLoggerProvider(WebLoggerOptions options)
{
_loggers = new ConcurrentDictionary <string, WebLogger>();
_loggerProcessor = new WebLoggerProcessor();
UpdateOptions(options);
}
public async Task Invoke(HttpContext context, WebLoggerProcessor processor)
{
var token = context?.RequestAborted ?? default;
context.Response.ContentType = "text/event-stream";
context.Response.Headers[HeaderNames.CacheControl] = "no-cache";
// Make sure we disable all response buffering for SSE
var bufferingFeature = context.Features.Get <IHttpResponseBodyFeature>();
bufferingFeature.DisableBuffering();
context.Response.Headers[HeaderNames.ContentEncoding] = "identity";
// Workaround for a Firefox bug where EventSource won't fire the open event
// until it receives some data
await context.Response.WriteAsync("\r\n");
await context.Response.Body.FlushAsync();
Subscribe(processor);
await foreach (var message in FetchLogs(token))
{
if (message.TimeStamp != null)
{
await context.Response.Body.WriteAsync(Encoding.ASCII.GetBytes(message.TimeStamp), token);
}
if (message.LevelString != null)
{
await context.Response.Body.WriteAsync(Encoding.ASCII.GetBytes(message.LevelString), token);
}
await context.Response.Body.WriteAsync(Encoding.ASCII.GetBytes(message.Message), token);
}
}