private void FetcherAsynch_OnError(DroidRequestState state, NetworkResponse postNetworkResponse)
{
string message;
switch (state.StatusCode)
{
case HttpStatusCode.RequestTimeout:
message = "FetcherAsynch call to FetchAsynch timed out. uri " + state.AbsoluteUri;
Device.Log.Metric(string.Format("FetchAsynch timed out: Uri: {0} Time: {1} milliseconds ", state.AbsoluteUri, DateTime.UtcNow.Subtract(_dtMetric).TotalMilliseconds));
postNetworkResponse.URI = state.AbsoluteUri;
postNetworkResponse.StatusCode = HttpStatusCode.RequestTimeout;
postNetworkResponse.ResponseString = string.Empty;
postNetworkResponse.Expiration = DateTime.MinValue.ToUniversalTime();
postNetworkResponse.AttemptToRefresh = DateTime.MinValue.ToUniversalTime();
state.WebExceptionStatusCode = WebExceptionStatus.Timeout;
state.Downloaded = DateTime.UtcNow;
break;
default:
message = "FetcherAsynch call to FetchAsynch threw an exception";
state.WebExceptionStatusCode = WebExceptionStatus.ProtocolError;
postNetworkResponse.StatusCode = state.StatusCode;
postNetworkResponse.Message = message;
postNetworkResponse.ResponseString = null;
postNetworkResponse.ResponseBytes = null;
postNetworkResponse.Verb = state.Verb;
break;
}
var exc = new Exception(message, state.Exception);
Device.Log.Error(exc);
postNetworkResponse.WebExceptionStatusCode = state.WebExceptionStatusCode;
postNetworkResponse.Exception = exc;
postNetworkResponse.Downloaded = state.Downloaded;
Device.PostNetworkResponse(postNetworkResponse);
}
private void FetcherAsynch_OnDownloadComplete(DroidRequestState state, NetworkResponse postNetworkResponse)
{
postNetworkResponse.StatusCode = state.StatusCode;
postNetworkResponse.WebExceptionStatusCode = state.WebExceptionStatusCode;
postNetworkResponse.URI = state.AbsoluteUri;
postNetworkResponse.Verb = state.Verb;
postNetworkResponse.ResponseString = state.ResponseString;
postNetworkResponse.ResponseBytes = state.ResponseBytes;
postNetworkResponse.Expiration = state.Expiration;
postNetworkResponse.Downloaded = state.Downloaded;
postNetworkResponse.AttemptToRefresh = state.AttemptToRefresh;
postNetworkResponse.Message = state.ErrorMessage;
switch (postNetworkResponse.StatusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
case HttpStatusCode.Accepted:
// things are ok, no event required
break;
case HttpStatusCode.NoContent: // return when an object is not found
case HttpStatusCode.Unauthorized: // return when session expires
case HttpStatusCode.InternalServerError: // return when an exception happens
case HttpStatusCode.ServiceUnavailable: // return when the database or siteminder are unavailable
postNetworkResponse.Message = string.Format("Network Service responded with status code {0}",
state.StatusCode);
Device.PostNetworkResponse(postNetworkResponse);
break;
default:
postNetworkResponse.Message = string.Format("FetcherAsynch completed but received HTTP {0}",
state.StatusCode);
Device.Log.Error(postNetworkResponse.Message);
Device.PostNetworkResponse(postNetworkResponse);
return;
}
}
public void FetchSync(object param)
{
DisableConnectionReuseIfNecessary();
_dtMetric = DateTime.UtcNow;
var fetchParameters = (DroidFetchParameters)param;
var state = new DroidRequestState
{
AbsoluteUri = fetchParameters.Uri,
FileName = fetchParameters.FileName,
Downloaded = DateTime.UtcNow,
Verb = "GET",
};
var tokenSource2 = new CancellationTokenSource();
CancellationToken token = tokenSource2.Token;
var t = Task.Factory.StartNew(() =>
{
token.ThrowIfCancellationRequested();
var currThread = Thread.CurrentThread;
using (token.Register(currThread.Abort))
{
var url = new URL(fetchParameters.Uri);
state.Connection = (HttpURLConnection)url.OpenConnection();
url.Dispose();
state.Connection.ConnectTimeout = fetchParameters.Timeout;
state.Connection.ReadTimeout = fetchParameters.Timeout;
if (fetchParameters.Headers != null && fetchParameters.Headers.Any())
{
foreach (var key in fetchParameters.Headers.Keys)
{
state.Connection.SetRequestProperty(key, fetchParameters.Headers[key]);
}
}
// End the Asynchronous response and get the actual response object
state.Expiration = state.Connection.GetHeaderField("Expires").TryParseDateTimeUtc();
state.AttemptToRefresh = state.Connection.GetHeaderField("MonoCross-Attempt-Refresh").TryParseDateTimeUtc();
// apply web response headers to data collection.
foreach (string key in state.Connection.HeaderFields.Keys.Where(k => k != null))
{
state.Data[key] = state.Connection.GetHeaderField(key);
}
state.StatusCode = (HttpStatusCode)state.Connection.ResponseCode;
switch (state.StatusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
case HttpStatusCode.Accepted:
try
{
// extract response into bytes and string.
byte[] bytes;
var webResponse = new WebResponse
{
ResponseBytes = bytes = NetworkUtils.StreamToByteArray(state.Connection.InputStream),
ResponseString = NetworkUtils.ByteArrayToStr(bytes),
};
if (!string.IsNullOrEmpty(state.FileName))
{
Device.File.Save(state.FileName, bytes);
}
state.ResponseBytes = bytes;
state.ResponseString = webResponse.ResponseString;
FetcherAsynch_OnDownloadComplete(state, fetchParameters.NetworkResponse);
}
catch (Exception ex)
{
string StatusDescription = string.Empty;
ex.Data.Add("Uri", state.Connection.URL.ToString());
ex.Data.Add("Verb", state.Connection.RequestMethod);
if (state.Connection != null)
{
state.StatusCode = (HttpStatusCode)state.Connection.ResponseCode;
StatusDescription = state.Connection.ResponseMessage;
}
else
{
state.StatusCode = (HttpStatusCode)(-2);
}
if (string.IsNullOrEmpty(StatusDescription))
{
ex.Data.Add("StatusDescription", StatusDescription);
state.ErrorMessage = string.Format("Call to {0} had an Exception. {1}", state.Connection.URL, ex.Message);
state.WebExceptionStatusCode = (WebExceptionStatus)(-1);
}
else
{
state.ErrorMessage = string.Format("Call to {0} had a web exception. {1} Desc: {2}", state.Connection.URL, ex.Message, StatusDescription);
state.StatusCode = (HttpStatusCode)(-1);
}
ex.Data.Add("StatusCode", state.StatusCode);
state.Exception = ex;
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
Device.Log.Error(state.ErrorMessage);
Device.Log.Error(ex);
FetcherAsynch_OnError(state, fetchParameters.NetworkResponse);
}
finally
{
//if (state.Response != null)
// ((IDisposable)state.Response).Dispose();
state.Connection.Disconnect();
state.Connection = null;
}
break;
case HttpStatusCode.NoContent:
state.ErrorMessage = string.Format("No Content returned: Result {0} for {1}", state.StatusCode, state.AbsoluteUri);
Device.Log.Warn(state.ErrorMessage);
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
state.Downloaded = DateTime.UtcNow;
FetcherAsynch_OnDownloadComplete(state, fetchParameters.NetworkResponse);
break;
default:
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
state.Downloaded = DateTime.UtcNow;
FetcherAsynch_OnError(state, fetchParameters.NetworkResponse);
break;
}
}
}, token);
try
{
t.Wait(fetchParameters.Timeout + 5);
}
catch (Exception e)
{
state.Exception = e;
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
state.Downloaded = DateTime.UtcNow;
FetcherAsynch_OnError(state, fetchParameters.NetworkResponse);
}
finally
{
if (state.Connection != null)
{
Task.Factory.StartNew(() =>
{
state.Connection.Disconnect();
state.Connection = null;
});
}
}
if (tokenSource2 != null && !t.IsCompleted)
{
tokenSource2.Cancel();
state.StatusCode = HttpStatusCode.RequestTimeout;
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
state.Downloaded = DateTime.UtcNow;
FetcherAsynch_OnError(state, fetchParameters.NetworkResponse);
}
Device.Log.Metric(string.Format("FetchAsynch Completed: Uri: {0} Time: {1} milliseconds Size: {2} ", state.AbsoluteUri, DateTime.UtcNow.Subtract(_dtMetric).TotalMilliseconds, (fetchParameters.NetworkResponse.ResponseBytes != null ? fetchParameters.NetworkResponse.ResponseBytes.Length : -1)));
}
