public override void Execute()
{
try
{
base.Execute();
}
catch (GDataRequestException re)
{
HttpWebResponse webResponse = re.Response as HttpWebResponse;
if (webResponse != null && webResponse.StatusCode == HttpStatusCode.Unauthorized)
{
Tracing.TraceMsg("Access token might have expired, refreshing.");
Reset();
try
{
OAuthUtil.RefreshAccessToken(this.factory.Parameters);
}
catch (WebException e)
{
Tracing.TraceMsg("Failed to refresh access token: " + e.StackTrace);
throw re;
}
base.Execute();
}
else
{
throw;
}
}
}
private void EnsureOAuthCredentials(HttpWebRequest request)
{
string oauthHeader = OAuthUtil.GenerateHeader(
request.RequestUri,
this.ConsumerKey,
this.ConsumerSecret,
this.Token,
this.TokenSecret,
request.Method);
request.Headers.Add(oauthHeader);
}
/// <summary>
/// sets up the correct credentials for this call.
/// </summary>
protected override void EnsureCredentials()
{
HttpWebRequest http = this.Request as HttpWebRequest;
if (string.IsNullOrEmpty(this.factory.ConsumerKey) || string.IsNullOrEmpty(this.factory.ConsumerSecret))
{
throw new GDataRequestException("ConsumerKey and ConsumerSecret must be provided to use GOAuthRequestFactory");
}
string oauthHeader = OAuthUtil.GenerateHeader(
http.RequestUri,
this.factory.ConsumerKey,
this.factory.ConsumerSecret,
this.factory.Token,
this.factory.TokenSecret,
http.Method);
this.Request.Headers.Remove("Authorization"); // needed?
this.Request.Headers.Add(oauthHeader);
}
