/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <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 (this.Response is HttpWebResponse)
{
HttpWebResponse response = this.Response as HttpWebResponse;
this.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();
this.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 (this.factory.StrictRedirect == true)
{
HttpWebRequest http = this.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();
this.TargetUri = new Uri(re.Location);
CopyRequestData();
base.Execute();
}
catch (GDataRequestException)
{
if (retryCounter > this.factory.NumberOfRetries)
{
Tracing.TraceMsg("Got no response object");
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();
this.Execute(retryCounter + 1);
}
catch (Exception e)
{
Tracing.TraceCall("*** EXCEPTION " + e.GetType().Name + " CAUGTH ***");
throw;
}
finally
{
if (this.requestCopy != null)
{
this.requestCopy.Close();
this.requestCopy = null;
}
}
}