private void FetchAndStoreContents(ChorusAccount chorusAccount, Uri requestUri)
{
ChorusContents contents = new ChorusContents();
var key = new RequestKey(chorusAccount, requestUri);
try
{
StoreContentsResponse(key, new ChorusContentsResponse(FetchContents(chorusAccount, requestUri), true));
}
catch (Exception exception)
{
ChorusServerException chorusException = exception as ChorusServerException;
// ReSharper disable once ConvertIfStatementToNullCoalescingExpression
if (null == chorusException)
{
chorusException = new ChorusServerException(
Resources.ChorusSession_FetchContents_There_was_an_error_communicating_with_the_server__
+ exception.Message, exception);
}
StoreContentsResponse(key, new ChorusContentsResponse(contents, true)
{
ChorusException = chorusException,
});
}
finally
{
lock (_lock)
{
_fetchRequests.Remove(key);
}
}
}
public static ChorusServerException WrapWebException(WebException webException)
{
string httpErrorMessage = Resources.ChorusSession_WrapWebException_An_error_occurred_communicating_with_the_server___The_server_return_HTTP_error_response_code__0__;
try
{
if (null == webException.Response)
{
return(new ChorusServerException(string.Format(httpErrorMessage, webException.Status), webException)); // Not L10N
}
using (var responseStream = webException.Response.GetResponseStream())
{
if (null == responseStream)
{
return
(new ChorusServerException(
string.Format(httpErrorMessage, webException.Status), webException));
}
MemoryStream memoryStream = new MemoryStream();
int count;
byte[] buffer = new byte[65536];
while ((count = responseStream.Read(buffer, 0, buffer.Length)) != 0)
{
memoryStream.Write(buffer, 0, count);
}
String fullMessage = Encoding.UTF8.GetString(memoryStream.ToArray());
var xmlSerializer = new XmlSerializer(typeof(ChorusErrorResponse));
ChorusErrorResponse chorusErrorResponse;
try
{
chorusErrorResponse =
(ChorusErrorResponse)xmlSerializer.Deserialize(new StringReader(fullMessage));
}
catch (Exception)
{
// If there is an error in the XML of the response, then put the full text of the response in an inner exception,
// and return them an error.
var innerException = new ChorusServerException(fullMessage, webException);
return(new ChorusServerException(string.Format(Resources.ChorusSession_WrapWebException_An_error_occurred_communicating_with_the_server___The_server_returned_the_HTTP_error_response_code__0__but_the_error_message_could_not_be_parsed_, webException.Status), innerException));
}
if (!string.IsNullOrEmpty(chorusErrorResponse.StackTrace))
{
Trace.TraceWarning(chorusErrorResponse.StackTrace);
}
return(new ChorusServerException(chorusErrorResponse.Message, webException));
}
}
catch (Exception exception)
{
return(new ChorusServerException(exception.Message, new AggregateException(webException, exception)));
}
}
public ChorusContentsResponse(ChorusServerException exception)
{
ChorusException = exception;
}
public bool AsyncFetchContents(ChorusAccount chorusAccount, ChorusUrl chorusUrl, out ChorusServerException chorusException)
{
Uri requestUri = GetContentsUri(chorusAccount, chorusUrl);
if (null == requestUri)
{
chorusException = null;
return(true);
}
RequestKey requestKey = new RequestKey(chorusAccount, requestUri);
lock (_lock)
{
ChorusContentsResponse chorusContentsResponse;
if (_chorusContentsByServerUrl.TryGetValue(requestKey, out chorusContentsResponse))
{
chorusException = chorusContentsResponse.ChorusException;
return(chorusContentsResponse.IsComplete);
}
chorusException = null;
if (!_fetchRequests.Add(requestKey))
{
return(false);
}
}
ActionUtil.RunAsync(() => FetchAndStoreContents(chorusAccount, requestUri), "Fetch from Chorus"); // Not L10N
return(false);
}