private void GetUrlCallback(IAsyncResult result)
{
if (result == null || result.AsyncState == null)
{
return;
}
try
{
HttpWebRequest request = result.AsyncState as HttpWebRequest;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(result);
using (Stream stream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(stream, Encoding.UTF8);
string responseString = "";
string line;
while ((line = reader.ReadLine()) != null)
{
responseString += line;
}
HttpStatusCode statusCode = response.StatusCode;
// If status between 200 and 300, success
if (statusCode >= HttpStatusCode.OK && statusCode < HttpStatusCode.MultipleChoices)
{
JToken root = JObject.Parse(responseString);
JToken successToken = root["success"];
bool success = successToken.ToString().ToLower().Equals("true");
if (success)
{
if (parameters.matResponse != null)
parameters.matResponse.DidSucceedWithData(responseString);
// Get site_event_type from json response
JToken siteEventTypeToken = root["site_event_type"];
string siteEventType = siteEventTypeToken.ToString();
// Only store log_id for opens
if (siteEventType.Equals("open"))
{
JToken logIdToken = root["log_id"];
string logId = logIdToken.ToString();
if (parameters.OpenLogId == null)
parameters.OpenLogId = logId;
parameters.LastOpenLogId = logId;
}
}
else
{
if (parameters.matResponse != null)
parameters.matResponse.DidFailWithError(responseString);
if (currentUrlAttempt < MAX_NUMBER_OF_RETRY_ATTEMPTS)
{
Debug.WriteLine("MAT request failed, will be queued");
eventQueue.AddToQueue(currentUrl, currentPostData, ++currentUrlAttempt);
}
else
{
Debug.WriteLine("Exceeded maximum number of retries. Will not be requeued.");
}
}
if (parameters.DebugMode)
Debug.WriteLine("Server response is " + responseString);
}
else // Requeue all other requests
{
if (currentUrlAttempt < MAX_NUMBER_OF_RETRY_ATTEMPTS)
{
Debug.WriteLine("MAT request failed, will be queued");
eventQueue.AddToQueue(currentUrl, currentPostData, ++currentUrlAttempt);
}
else
{
Debug.WriteLine("Exceeded maximum number of retries. Will not be requeued.");
}
}
}
request = null;
response = null;
}
catch (WebException e)
{
Debug.WriteLine(e.Message);
// Requeue the request for SSL error
// Have to convert to String because TrustFailure isn't accessible in this .NET WebExceptionStatus for some reason
if (e.Status.ToString().Equals("TrustFailure"))
{
if (currentUrlAttempt < MAX_NUMBER_OF_RETRY_ATTEMPTS)
{
Debug.WriteLine("SSL error, will be queued");
eventQueue.AddToQueue(currentUrl, currentPostData, ++currentUrlAttempt);
}
else
{
Debug.WriteLine("Exceeded maximum number of retries. Will not be requeued.");
}
return;
}
//For 400 (HttpWebRequest throws WebException on 4XX-5XX, so the logic must be written here)
//We may want to switch to HttpClient for Windows Phone 8, but this requires downloading a separate library (still in beta, last I checked).
//Within WebException is the only way to provide feedback to the client.
if (e.Response != null)
{
using (WebResponse webResponse = e.Response)
{
HttpWebResponse httpWebResponse = (HttpWebResponse)webResponse;
using (Stream stream = webResponse.GetResponseStream())
using (StreamReader streamReader = new StreamReader(stream, Encoding.UTF8))
{
string responseString = "";
string line;
while ((line = streamReader.ReadLine()) != null)
{
responseString += line;
}
if (httpWebResponse.StatusCode == HttpStatusCode.BadRequest && webResponse.Headers["X-MAT-Responder"] != null)
{
if (parameters.matResponse != null)
parameters.matResponse.DidFailWithError((responseString));
Debug.WriteLine("MAT request received 400 error from server, won't be retried");
}
else //Requeue for any other status code
{
if (parameters.matResponse != null)
parameters.matResponse.DidFailWithError((responseString));
if (currentUrlAttempt < MAX_NUMBER_OF_RETRY_ATTEMPTS)
{
Debug.WriteLine("MAT request failed, will be queued");
eventQueue.AddToQueue(currentUrl, currentPostData, ++currentUrlAttempt);
}
else
{
Debug.WriteLine("Exceeded maximum number of retries. Will not be requeued.");
}
}
}
}
}
}
}
