private async Task <RequestLog> LogRequest(HttpRequest req, DateTime requestBegin, DbCore dbc)
{
RequestLog log = new RequestLog
{
RequestBegin = requestBegin,
URL = req.GetDisplayUrl(),
RequestMethod = req.Method,
RequestContentType = req.Headers.GetValueOrDefault("Content-Type", ""),
RequestSize = (int)(req.ContentLength ?? 0),
IP = req.HttpContext.Connection.RemoteIpAddress.ToString(),
UserAgent = req.Headers.GetValueOrDefault("User-Agent", ""),
Referer = req.Headers.GetValueOrDefault("Referer", "")
};
//Allow resetting stream back to start after reading it
req.EnableRewind();
//Get the request body
string requestAsText = await new StreamReader(req.Body).ReadToEndAsync();
//Save a bit of it for logging
if (!requestAsText.IsNullOrWhitespace())
{
log.RequestText = requestAsText.Left(RequestLogLength);
}
//Reset the request stream back to the beginning
req.Body.Seek(0, SeekOrigin.Begin);
dbc.RequestLogs.Add(log);
await dbc.SaveChangesAsync();
return(log);
}
private async Task LogResponse(HttpResponse resp, RequestLog log, Stopwatch timer,
DbCore dbc, string ExceptionMessage = null)
{
bool hasException = ExceptionMessage != null;
dbc.Entry(log);
log.ResponseStatus = hasException ? 500 : resp.StatusCode;
log.ResponseContentType = resp.Headers.GetValueOrDefault("Content-Type", "");
//ContentLength not always set. Fallback to buffer length if unset
log.ResponseSize = (int)(resp.ContentLength ?? resp.Body.Length);
log.Location = resp.Headers.GetValueOrDefault("Location", "");
//TODO: log.ResponseType = ???!!!
//Earlier, the response.body stream was replaced with one that allows rewinding
//so rewind to beginning, read it, and rewind it again.
resp.Body.Seek(0, SeekOrigin.Begin);
string responseAsText = await new StreamReader(resp.Body).ReadToEndAsync();
resp.Body.Seek(0, SeekOrigin.Begin);
if (!responseAsText.IsNullOrWhitespace())
{
log.ResponseText = responseAsText.Left(ResponseLogLength);
}
else if (hasException)
{
log.ResponseText = "Unhandled exception: ";
log.ResponseText += ExceptionMessage.Left(ResponseLogLength - log.ResponseText.Length);
}
//Do as much work as possible before getting the time
log.ResponseMs = (decimal)timer.Elapsed.TotalMilliseconds;
await dbc.SaveChangesAsync();
}