private void SendBufferAsync(LoggingEvent[] events)
{
DebugLog("Entering SendBufferAsync");
try
{
var eventsToSend = events.Select(e => new
{
Level = e.Level.Name,
e.LoggerName,
Message = e.RenderedMessage,
e.TimeStamp,
e.Identity,
e.ThreadName,
e.UserName,
Exception = e.GetExceptionString()
});
var json = JsonConvert.SerializeObject(eventsToSend);
var requestUriString =
$"https://{WorkspaceId}.ods.opinsights.azure.com/api/logs?api-version={ApiVersion}";
var dateTime = DateTime.UtcNow;
var dateString = dateTime.ToString("r");
String signature;
var message = $"POST\n{json.Length}\napplication/json\nx-ms-date:{dateString}\n/api/logs";
var bytes = Encoding.UTF8.GetBytes(message);
using (var encryptor = new HMACSHA256(Convert.FromBase64String(SharedKey)))
{
signature = $"SharedKey {WorkspaceId}:{Convert.ToBase64String(encryptor.ComputeHash(bytes))}";
}
var request = (HttpWebRequest)WebRequest.Create(requestUriString);
request.ContentType = "application/json";
request.Method = "POST";
request.Headers["Log-Type"] = LogType.Replace(" ", "");
request.Headers["x-ms-date"] = dateString;
request.Headers["Authorization"] = signature;
var content = Encoding.UTF8.GetBytes(json);
using (var requestStreamAsync = request.GetRequestStream())
{
requestStreamAsync.Write(content, 0, content.Length);
}
using (var responseAsync = (HttpWebResponse)request.GetResponse())
{
if (responseAsync.StatusCode != HttpStatusCode.OK &&
responseAsync.StatusCode != HttpStatusCode.Accepted)
{
var responseStream = responseAsync.GetResponseStream();
if (responseStream != null)
{
using (var streamReader = new StreamReader(responseStream))
{
throw new Exception(streamReader.ReadToEnd());
}
}
}
}
}
catch (Exception ex)
{
DebugLog("Exception occurred (rethrowing)");
DebugLog(ex.ToString());
throw;
}
finally
{
DebugLog("Exiting SendBuffer");
}
}