private void RequestAsynch( Object parameters )
{
RequestParameters requestParameters = (RequestParameters) parameters;
RequestState state = new RequestState()
{
PostBytes = requestParameters.PostBytes,
Uri = requestParameters.Uri,
Verb = requestParameters.Verb,
};
DateTime dtMetric = DateTime.UtcNow;
HttpWebRequest request = (HttpWebRequest) WebRequest.Create( state.Uri );
request.Method = requestParameters.Verb; // Post, Put, Delete
request.ContentType = requestParameters.ContentType;
#if !SILVERLIGHT && !MONO
request.ContentLength = requestParameters.PostBytes.Length;
request.AutomaticDecompression = DecompressionMethods.Deflate;
request.KeepAlive = false;
#endif
// To-Do: Refactor this central storage of header values to inject into an abstract network object.
// inject request headers from iApp object.
if ( requestParameters.Headers != null && requestParameters.Headers.Count() > 0 )
{
foreach ( string key in requestParameters.Headers.Keys )
{
request.Headers[key] = requestParameters.Headers[key];
}
}
state.Request = request;
// Start the asynchronous request.
IAsyncResult result = request.BeginGetRequestStream( new AsyncCallback( GetRequestStreamCallback ), state );
if ( !allDone.WaitOne( DefaultTimeout ) )
{
OnError( state );
return;
}
}
private void PostRequest_OnError( RequestState state )
{
Exception exc = new Exception( "PosterAsynch call to RequestAsynch threw an exception", state.Exception );
MXDevice.Log.Error( exc );
PostNetworkResponse.StatusCode = state.StatusCode;
PostNetworkResponse.Message = exc.Message;
PostNetworkResponse.Exception = exc;
PostNetworkResponse.URI = state.Uri;
PostNetworkResponse.Verb = state.Verb;
MXDevice.PostNetworkResponse(PostNetworkResponse);
}
private void PostRequest_OnComplete( RequestState state )
{
PostNetworkResponse.StatusCode = state.StatusCode;
PostNetworkResponse.URI = state.Uri;
PostNetworkResponse.Verb = state.Verb;
PostNetworkResponse.ResponseString = state.ResponseString;
PostNetworkResponse.ResponseBytes = state.ResponseBytes;
PostNetworkResponse.Expiration = state.Expiration;
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 );
MXDevice.PostNetworkResponse(PostNetworkResponse);
break;
default:
PostNetworkResponse.Message = String.Format( "PosterAsynch completed but received HTTP {0}", state.StatusCode );
// Application.Log.Error( PostNetworkResponse.Message );
MXDevice.PostNetworkResponse(PostNetworkResponse);
return;
}
}
private void FetchAsynch( Object parameters )
{
FetchParameters fetchParameters = (FetchParameters) parameters;
HttpWebRequest request = (HttpWebRequest) WebRequest.Create( fetchParameters.Uri );
request.Method = "GET";
//request.Proxy = null;
#if !SILVERLIGHT && !MONO
request.AutomaticDecompression = DecompressionMethods.GZip;
#endif
if ( fetchParameters.Headers != null && fetchParameters.Headers.Count() > 0 )
{
foreach ( string key in fetchParameters.Headers.Keys )
{
request.Headers[key] = fetchParameters.Headers[key];
}
}
RequestState state = new RequestState()
{
Request = request,
AbsoluteUri = fetchParameters.Uri,
FileName = fetchParameters.FileName
};
// Start the asynchronous request.
IAsyncResult result = request.BeginGetResponse( new AsyncCallback( ResponseCallback ), state );
if ( !allDone.WaitOne( DefaultTimeout ) )
{
OnError( state );
return;
}
}
// Define other methods and classes here
private void ResponseCallback(IAsyncResult result)
{
// Get and fill the RequestState
RequestState state = (RequestState)result.AsyncState;
try
{
HttpWebRequest request = state.Request;
// End the Asynchronous response and get the actual response object
state.Response = (HttpWebResponse)request.EndGetResponse(result);
state.Expiration = state.Response.Headers["Expires"].TryParseDateTimeUtc();
// apply web response headers to data collection.
// To-Do: evaluate which headers are actually needed and skip those that aren't. So, what's our logic for "needed headers" ?
foreach (string key in state.Response.Headers.AllKeys)
{
state.Data[key] = state.Response.Headers[key];
}
state.StatusCode = state.Response.StatusCode;
switch (state.StatusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
case HttpStatusCode.Accepted:
break;
case HttpStatusCode.NoContent:
state.ErrorMessage = String.Format("No Content returned: Result {0} for {1}", state.StatusCode, request.RequestUri);
MXDevice.Log.Warn(state.ErrorMessage);
state.Expiration = DateTime.UtcNow;
OnDownloadComplete(state);
return;
default:
state.ErrorMessage = String.Format("Get failed. Received HTTP {0} for {1}", state.StatusCode, request.RequestUri);
MXDevice.Log.Error(state.ErrorMessage);
state.Expiration = DateTime.UtcNow;
OnDownloadComplete(state);
return;
}
// extract response into bytes and string.
WebResponse webResponse = NetworkUtils.ExtractResponse(state.Response, state.FileName);
state.ResponseBytes = webResponse.ResponseBytes;
state.ResponseString = webResponse.ResponseString;
OnDownloadComplete(state);
}
catch (WebException ex)
{
ex.Data.Add("Uri", state.Request.RequestUri);
ex.Data.Add("Verb", state.Request.Method);
state.StatusCode = ((HttpWebResponse)ex.Response).StatusCode;
ex.Data.Add("StatusCode", state.StatusCode);
ex.Data.Add("StatusDescription", ((HttpWebResponse)ex.Response).StatusDescription);
state.ErrorMessage = string.Format("Call to {0} had a Webexception. {1} Status: {2} Desc: {3}", state.Request.RequestUri, ex.Message, ex.Status, ((HttpWebResponse)ex.Response).StatusDescription);
state.Exception = ex;
state.Expiration = DateTime.UtcNow;
MXDevice.Log.Error(state.ErrorMessage);
MXDevice.Log.Error(ex);
OnError(state);
}
catch (Exception ex)
{
ex.Data.Add("Uri", state.Request.RequestUri);
ex.Data.Add("Verb", state.Request.Method);
state.ErrorMessage = string.Format("Call to {0} had an Exception. {1}", state.Request.RequestUri, ex.Message);
state.Exception = ex;
state.StatusCode = (HttpStatusCode)(-1);
state.Expiration = DateTime.UtcNow;
MXDevice.Log.Error(state.ErrorMessage);
MXDevice.Log.Error(ex);
OnError(state);
}
finally
{
if (state.Response != null)
{
state.Response.Close();
}
state.Request = null;
allDone.Set();
}
}
private void GetResponseCallback(IAsyncResult asynchronousResult)
{
// Get and fill the RequestState
RequestState state = (RequestState)asynchronousResult.AsyncState;
HttpWebRequest request = state.Request;
HttpWebResponse response = null;
try
{
// End the Asynchronous response and get the actual response object
response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
state.StatusCode = response.StatusCode;
switch (response.StatusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
case HttpStatusCode.Accepted:
break;
case HttpStatusCode.NoContent:
Device.Log.Info("Empty payload returned in PosterAsynch: Result {0} for {1}", state.StatusCode, request.RequestUri);
break;
default:
state.ErrorMessage = String.Format("{0} failed. Received HTTP {1} for {2}", state.Verb, response.StatusCode, state.Uri);
Device.Log.Error(state.ErrorMessage);
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
OnComplete(state);
return;
}
// extract response into bytes and string.
WebResponse webResponse = NetworkUtils.ExtractResponse(response);
state.ResponseBytes = webResponse.ResponseBytes;
state.ResponseString = webResponse.ResponseString;
state.ResponseHeaders = webResponse.ResponseHeaders;
#if !NETCF
state.Expiration = response.Headers["Expires"].TryParseDateTimeUtc();
state.AttemptToRefresh = response.Headers["MonoCross-Attempt-Refresh"].TryParseDateTimeUtc();
#endif
OnComplete(state);
}
catch (WebException ex)
{
string StatusDescription = string.Empty;
string message = string.Format("Call to {0} had a Webexception. {1} Status: {2}", state.Request.RequestUri, ex.Message, ex.Status);
#if !NETCF
ex.Data.Add("WebException.StatusCode", ex.Status);
ex.Data.Add("Uri", state.Uri);
ex.Data.Add("Verb", state.Verb);
ex.Data.Add("StatusCode", state.StatusCode);
#endif
if (ex.Response != null)
{
state.StatusCode = ((HttpWebResponse)ex.Response).StatusCode;
StatusDescription = ((HttpWebResponse)ex.Response).StatusDescription;
state.ResponseHeaders = ex.Response.Headers;
}
else if (ex.Message.ToLower().Contains("request was aborted"))
{
state.StatusCode = HttpStatusCode.RequestTimeout;
StatusDescription = "Request cancelled by client because the server did not respond within timeout";
}
else
{
state.StatusCode = (HttpStatusCode)(-2);
}
state.WebExceptionStatusCode = ex.Status;
#if !NETCF
ex.Data.Add("WebException.Status", ex.Status);
ex.Data.Add("StatusDescription", StatusDescription);
#endif
state.ErrorMessage = message;
state.Exception = ex;
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
OnError(state);
}
catch (Exception ex)
{
// TODO: Consider adding custom post exceptions...
string message = string.Format("Call to {0} had an Exception. {1}", state.Request.RequestUri, ex.Message);
Exception qexc = new Exception(message, ex);
#if !NETCF
qexc.Data.Add("Uri", state.Uri);
qexc.Data.Add("Verb", state.Verb);
#endif
state.ErrorMessage = message;
state.Exception = qexc;
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
state.StatusCode = (HttpStatusCode)(-1);
state.WebExceptionStatusCode = (WebExceptionStatus)(-1);
OnError(state);
}
finally
{
// Release the HttpWebResponse
if (response != null)
{
((IDisposable)response).Dispose();
}
state.Request = null;
allDone.Set();
}
}
private void FetcherAsynch_OnError( RequestState state )
{
Exception exc = new Exception( "FetcherAsynch call to FetchAsynch threw an exception", state.Exception );
MXDevice.Log.Error( exc );
PostNetworkResponse.StatusCode = state.StatusCode;
PostNetworkResponse.Message = exc.Message;
PostNetworkResponse.Exception = exc;
PostNetworkResponse.URI = state.AbsoluteUri;
PostNetworkResponse.Verb = state.Verb;
PostNetworkResponse.ResponseString = null;
PostNetworkResponse.ResponseBytes = null;
MXDevice.PostNetworkResponse(PostNetworkResponse);
}
private void GetRequestStreamCallback(IAsyncResult asynchronousResult)
{
// Get and fill the RequestState
RequestState state = (RequestState)asynchronousResult.AsyncState;
HttpWebRequest request = state.Request;
string errorMsg = "PosterAsynch.GetRequestStreamCallback encountered WebException";
try
{
// End the operation
Stream postStream = request.EndGetRequestStream(asynchronousResult);
// Write to the request stream.
if (state.PostBytes == null)
{
state.PostBytes = new byte[0];
}
postStream.Write(state.PostBytes, 0, state.PostBytes.Length);
postStream.Close();
postStream.Dispose();
// Start the asynchronous operation to get the response
IAsyncResult result = request.BeginGetResponse(new AsyncCallback(GetResponseCallback), state);
}
catch (WebException ex)
{
string StatusDescription = string.Empty;
#if !NETCF
ex.Data.Add("Uri", state.Uri);
ex.Data.Add("Verb", state.Verb);
ex.Data.Add("WebException.Status", ex.Status);
#endif
state.ErrorMessage = errorMsg;
state.Exception = ex;
state.WebExceptionStatusCode = ex.Status;
if (ex.Response != null)
{
state.StatusCode = ((HttpWebResponse)ex.Response).StatusCode;
}
else if (ex.Message.ToLower().Contains("request was aborted"))
{
state.StatusCode = HttpStatusCode.RequestTimeout;
StatusDescription = "Request cancelled by client because the server did not respond within timeout";
}
else
{
state.StatusCode = (HttpStatusCode)(-2);
}
#if !NETCF
ex.Data.Add("StatusCode", state.StatusCode);
ex.Data.Add("StatusDescription", StatusDescription);
#endif
OnError(state);
allDone.Set();
}
catch (Exception ex)
{
#if !NETCF
ex.Data.Add("Uri", state.Uri);
ex.Data.Add("Verb", state.Verb);
#endif
state.ErrorMessage = errorMsg;
state.Exception = ex;
state.StatusCode = (HttpStatusCode)(-2);
OnError(state);
allDone.Set();
}
}
private void PostAsynch(Object parameters)
{
RequestParameters requestParameters = (RequestParameters)parameters;
RequestState state = new RequestState
{
PostBytes = requestParameters.PostBytes,
Uri = requestParameters.Uri,
Verb = requestParameters.Verb,
Downloaded = DateTime.UtcNow
};
DateTime dtMetric = DateTime.UtcNow;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(state.Uri);
request.Method = requestParameters.Verb; // Post, Put, Delete
request.ContentType = requestParameters.ContentType;
request.Timeout = requestParameters.Timeout;
request.ContentLength = requestParameters.PostBytes.Length;
request.AutomaticDecompression = DecompressionMethods.Deflate;
request.KeepAlive = false;
if (requestParameters.Headers != null && requestParameters.Headers.Any())
{
foreach (string key in requestParameters.Headers.Keys)
{
if (key.ToLower() == "accept")
{
request.Accept = requestParameters.Headers[key];
}
else if (key.ToLower() == "content-type")
{
request.ContentType = requestParameters.Headers[key];
}
else if (key.ToLower() == "host")
{
Exception ex;
#if NETCF
ex = new ArgumentException("Host header value cannot be set in Compact Frameword libraries.");
#else
//TODO: add the URL explaining PCL incompatibility
ex = new ArgumentException("Host header value cannot be set in PCL libraries.");
#endif
Device.Log.Error(ex);
throw ex;
}
else
{
request.Headers[key] = requestParameters.Headers[key];
}
}
}
state.Request = request;
try
{
// Start the asynchronous request.
IAsyncResult result = request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), state);
#if NETCF
if (!allDone.WaitOne(requestParameters.Timeout, false))
#else
if (!allDone.WaitOne(requestParameters.Timeout))
#endif
{
try { request.Abort(); } catch (Exception) { } // .Abort() always throws exception
return;
}
}
catch (Exception exc)
{
Device.Log.Error("PosterAsynch.PostAsynch encountered exception", exc);
autoEvent.Set();
}
}
// Define other methods and classes here
private void ResponseCallback(IAsyncResult result)
{
// Get and fill the RequestState
RequestState state = (RequestState)result.AsyncState;
try
{
HttpWebRequest request = state.Request;
// End the Asynchronous response and get the actual response object
state.Response = (HttpWebResponse)request.EndGetResponse(result);
state.Expiration = state.Response.Headers["Expires"].TryParseDateTimeUtc();
state.AttemptToRefresh = state.Response.Headers["MonoCross-Attempt-Refresh"].TryParseDateTimeUtc();
// apply web response headers to data collection.
// TODO: evaluate which headers are actually needed and skip those that aren't. So, what's our logic for "needed headers" ?
foreach (string key in state.Response.Headers.AllKeys)
{
state.Data[key] = state.Response.Headers[key];
}
state.StatusCode = state.Response.StatusCode;
switch (state.StatusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
case HttpStatusCode.Accepted:
break;
case HttpStatusCode.NoContent:
Device.Log.Info("Empty payload returned in FetcherAsynch: Result {0} for {1}", state.StatusCode, request.RequestUri);
break;
default:
state.ErrorMessage = String.Format("Get failed. Received HTTP {0} for {1}", state.StatusCode, request.RequestUri);
Device.Log.Error(state.ErrorMessage);
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
state.Downloaded = DateTime.UtcNow;
OnDownloadComplete(state);
return;
}
// extract response into bytes and string.
WebResponse webResponse = NetworkUtils.ExtractResponse(state.Response, state.FileName);
state.ResponseBytes = webResponse.ResponseBytes;
state.ResponseString = webResponse.ResponseString;
state.ResponseHeaders = webResponse.ResponseHeaders;
OnDownloadComplete(state);
}
catch (WebException ex)
{
string StatusDescription = string.Empty;
ex.Data.Add("Uri", state.Request.RequestUri);
ex.Data.Add("Verb", state.Request.Method);
if (ex.Response != null)
{
state.StatusCode = ((HttpWebResponse)ex.Response).StatusCode;
StatusDescription = ((HttpWebResponse)ex.Response).StatusDescription;
state.ResponseHeaders = ex.Response.Headers;
}
else if (ex.Message.ToLower().Contains("request was aborted"))
{
state.StatusCode = HttpStatusCode.RequestTimeout;
StatusDescription = "Request cancelled by client because the server did not respond within timeout";
}
else
{
state.StatusCode = (HttpStatusCode)(-2);
}
state.WebExceptionStatusCode = ex.Status;
ex.Data.Add("StatusCode", state.StatusCode);
ex.Data.Add("WebException.Status", ex.Status);
ex.Data.Add("StatusDescription", StatusDescription);
state.ErrorMessage = string.Format("Call to {0} had a Webexception. {1} Status: {2} Desc: {3}", state.Request.RequestUri, ex.Message, ex.Status, StatusDescription);
state.Exception = ex;
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
OnError(state);
}
catch (Exception ex)
{
ex.Data.Add("Uri", state.Request.RequestUri);
ex.Data.Add("Verb", state.Request.Method);
state.ErrorMessage = string.Format("Call to {0} had an Exception. {1}", state.Request.RequestUri, ex.Message);
state.Exception = ex;
state.StatusCode = (HttpStatusCode)(-1);
state.WebExceptionStatusCode = (WebExceptionStatus)(-1);
state.Expiration = DateTime.UtcNow;
state.AttemptToRefresh = DateTime.UtcNow;
OnError(state);
}
finally
{
if (state.Response != null)
{
((IDisposable)state.Response).Dispose();
}
state.Request = null;
allDone.Set();
}
}
private void GetResponseCallback(IAsyncResult asynchronousResult)
{
// Get and fill the RequestState
RequestState state = (RequestState)asynchronousResult.AsyncState;
HttpWebRequest request = state.Request;
HttpWebResponse response = null;
Stream streamResponse = null;
StreamReader streamRead = null;
try
{
// End the Asynchronous response and get the actual response object
//To-Do: This has the potential for cross-domain calls, which are tricky in SL. This line doesn't work in the MDT POC.
response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
state.StatusCode = response.StatusCode;
switch (response.StatusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
case HttpStatusCode.Accepted:
break;
case HttpStatusCode.NoContent:
state.ErrorMessage = String.Format("No Content returned: Result {0} for {1}", state.StatusCode, state.Uri);
MXDevice.Log.Warn(state.ErrorMessage);
state.Expiration = DateTime.UtcNow;
OnComplete(state);
return;
default:
state.ErrorMessage = String.Format("{0} failed. Received HTTP {1} for {2}", state.Verb, response.StatusCode, state.Uri);
MXDevice.Log.Error(state.ErrorMessage);
state.Expiration = DateTime.UtcNow;
OnComplete(state);
return;
}
// extract response into bytes and string.
WebResponse webResponse = NetworkUtils.ExtractResponse(response);
state.ResponseBytes = webResponse.ResponseBytes;
state.ResponseString = webResponse.ResponseString;
state.Expiration = response.Headers["Expires"].TryParseDateTimeUtc();
OnComplete(state);
}
catch (WebException ex)
{
// To-Do: Consider adding custom post exceptions...
string message = string.Format("Call to {0} had a Webexception. {1} Status: {2}", state.Request.RequestUri, ex.Message, ex.Status);
ex.Data.Add("ResponseStatusCode", ex.Status);
ex.Data.Add("Uri", state.Uri);
ex.Data.Add("Verb", state.Verb);
state.StatusCode = ((HttpWebResponse)ex.Response).StatusCode;
ex.Data.Add("StatusCode", state.StatusCode);
ex.Data.Add("StatusDescription", ((HttpWebResponse)ex.Response).StatusDescription);
state.Exception = ex;
OnError(state);
}
catch (Exception ex)
{
// To-Do: Consider adding custom post exceptions...
string message = string.Format("Call to {0} had an Exception. {1}", state.Request.RequestUri, ex.Message);
Exception qexc = new Exception(message, ex);
qexc.Data.Add("Uri", state.Uri);
qexc.Data.Add("Verb", state.Verb);
state.Exception = qexc;
OnError(state);
}
finally
{
// Close the stream object
if (streamResponse != null)
{
streamResponse.Close();
}
if (streamRead != null)
{
streamRead.Close();
}
// Release the HttpWebResponse
if (response != null)
{
response.Close();
}
state.Request = null;
allDone.Set();
}
}
private void FetchAsynch(Object parameters)
{
FetchParameters fetchParameters = (FetchParameters)parameters;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(fetchParameters.Uri);
request.Method = "GET";
request.AutomaticDecompression = DecompressionMethods.GZip;
if (fetchParameters.Headers != null && fetchParameters.Headers.Any())
{
foreach (string key in fetchParameters.Headers.Keys)
{
if (key.ToLower() == "accept")
{
request.Accept = fetchParameters.Headers[key];
}
else if (key.ToLower() == "content-type")
{
request.ContentType = fetchParameters.Headers[key];
}
else if (key.ToLower() == "host")
{
Exception ex;
#if NETCF
ex = new ArgumentException("Host header value cannot be set in Compact Frameword libraries.");
#else
ex = new ArgumentException("Host header value cannot be set in PCL libraries.");
#endif
Device.Log.Error(ex);
throw ex;
}
else
{
request.Headers[key] = fetchParameters.Headers[key];
}
}
}
RequestState state = new RequestState()
{
Request = request,
AbsoluteUri = fetchParameters.Uri,
FileName = fetchParameters.FileName,
Downloaded = DateTime.UtcNow,
StatusCode = HttpStatusCode.RequestTimeout,
};
try
{
// Start the asynchronous request.
IAsyncResult result = request.BeginGetResponse(new AsyncCallback(ResponseCallback), state);
#if NETCF
if (!allDone.WaitOne(fetchParameters.Timeout, false))
#else
if (!allDone.WaitOne(fetchParameters.Timeout))
#endif
{
try { request.Abort(); } catch (Exception) { } // .Abort() always throws exception
return;
}
}
catch (Exception exc)
{
Device.Log.Error("FetcherAsynch.FetchAsynch encountered exception", exc);
autoEvent.Set();
}
}
