/// <summary>standard constructor</summary>
public AtomFeedParser(IVersionAware v)
: base()
{
Tracing.TraceCall("constructing AtomFeedParser");
_nameTable = new AtomParserNameTable();
_nameTable.InitAtomParserNameTable();
_versionInfo = new VersionInformation(v);
}
/// <summary>
/// this gets called out of a notification chain. It sets
/// this objects version info and the extension lists. We do not
/// use the property accessor to avoid the notification loop
/// </summary>
/// <param name="obj"></param>
internal void SetVersionInfo(IVersionAware obj)
{
_versionInfo = new VersionInformation(obj);
_versionInfo.ImprintVersion(ExtensionElements);
_versionInfo.ImprintVersion(ExtensionFactories);
}
/// <summary>Constructor.</summary>
/// <param name="v">the versioninformation to pass </param>
internal ChangeVersion(IVersionAware v)
{
_v = new VersionInformation(v);
}
/// <summary>Executes the request and prepares the response stream. Also
/// does error checking</summary>
/// <param name="retryCounter">indicates the n-th time this is run</param>
protected void Execute(int retryCounter)
{
Tracing.TraceCall("GoogleAuth: Execution called");
try
{
CopyRequestData();
base.Execute();
if (Response is HttpWebResponse)
{
HttpWebResponse response = Response as HttpWebResponse;
_responseVersion = new VersionInformation(response.Headers[GDataGAuthRequestFactory.GDataVersion]);
}
}
catch (GDataForbiddenException)
{
Tracing.TraceMsg("need to reauthenticate, got a forbidden back");
// do it again, once, reset AuthToken first and streams first
Reset();
_factory.GAuthToken = null;
CopyRequestData();
base.Execute();
}
catch (GDataRedirectException re)
{
// we got a redirect.
Tracing.TraceMsg("Got a redirect to: " + re.Location);
// only reset the base, the auth cookie is still valid
// and cookies are stored in the factory
if (_factory.StrictRedirect)
{
HttpWebRequest http = Request as HttpWebRequest;
if (http != null)
{
// only redirect for GET, else throw
if (http.Method != HttpMethods.Get)
{
throw;
}
}
}
// verify that there is a non empty location string
if (re.Location.Trim().Length == 0)
{
throw;
}
Reset();
TargetUri = new Uri(re.Location);
CopyRequestData();
base.Execute();
}
catch (GDataRequestException re)
{
HttpWebResponse webResponse = re.Response as HttpWebResponse;
if (webResponse != null && webResponse.StatusCode != HttpStatusCode.InternalServerError)
{
Tracing.TraceMsg("Not a server error. Possibly a Bad request or forbidden resource.");
Tracing.TraceMsg("We don't want to retry non 500 errors.");
throw;
}
if (retryCounter > _factory.NumberOfRetries)
{
Tracing.TraceMsg("Number of retries exceeded");
throw;
}
Tracing.TraceMsg("Let's retry this");
// only reset the base, the auth cookie is still valid
// and cookies are stored in the factory
Reset();
Execute(retryCounter + 1);
}
catch (Exception e)
{
Tracing.TraceCall("*** EXCEPTION " + e.GetType().Name + " CAUGHT ***");
throw;
}
finally
{
if (_requestCopy != null)
{
_requestCopy.Close();
_requestCopy = null;
}
}
}