Redirection error An error occurred while processing your request in provider-hosted app which is hosted in Windows Azure

Question

Hello,
I developed one simple provider hosted app and I published it in my Azure website. I also published the SharePoint App of this solution in O365 site. I'm using Visual Studio 2013 Premium edition. I've followed all the steps to do this work e.g.
generate the client ID and client secret through my O365 site and updated the AppManifest.xml as well as web.config etc. In my AppWeb project, I've TokenHelper.cs and SharePoint.cs classes.
When I'm clicking the app from my O365 site, I get the following error "An error occurred while processing your request" which is due to the following code:
 protected void Page_PreInit(object sender, EventArgs e)
            Uri redirectUrl;
            switch (SharePointContextProvider.CheckRedirectionStatus(Context, out redirectUrl))
                case RedirectionStatus.Ok:
                    return;
                case RedirectionStatus.ShouldRedirect:
                    Response.Redirect(redirectUrl.AbsoluteUri, endResponse: true);
                    break;
                case RedirectionStatus.CanNotRedirect:
                    Response.Write("An error occurred while processing your request.");
                    Response.End();
                    break;
It's always executing the case RedirectionStatus.CanNotRedirect. Why?
I've checked the method "CheckRedirectionStatus" of SharePointContext.cs class completely and I am not understanding why am I getting this error.
When I browse my Azure website http://sitename.azurewebsites.net, even there I'm getting this error. I believe that error is because there is no query string parameter there e.g. SPHostURL etc.
Please let me know why I'm having this redirection error.
Thanks,
Ashish

Answer 1

Hi,
For a better troubleshooting,
I suggest you do as the following:
Debug the code step by step to find the reason of the issue.
For the remote debug your app from Windows Azure, you need to download Azure SDK:
http://azure.microsoft.com/en-us/downloads/
After installing the SDK, it will have “Attach Debugger” for Azure web site, you
also need to set "Attach Debugger" to on in the Windows Azure Management Portal
More detailed information about how to debug provider-hosted app:
http://blogs.technet.com/b/speschka/archive/2013/11/25/debugging-sharepoint-apps-that-are-hosted-in-windows-azure-web-sites.aspx
Best regards,
ZhengyuGuo
Forum Support
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