Apps: TokenHelper.GetContextTokenFromRequet returns null

Question

I created a new Project for Sharepoint 2013 Apps in the Visual Studio 12. I choosed autohosted and added the link to my SP Web Home Site. I also added:

<AppPermissionRequest Scope="http://sharepoint/content/sitecollection/web" Right="Read" />

in the AppManifest.

So why is the method TokenHelper.GetContextTokenFromRequet in the Default.aspx.cs always returning null?

Answer 1

Are you trying to deploy your app to Office 365 or an on-premises environment? If you are on-premises, you cannot use an Autohosted app. Instead, you will need to:

• Configure a public and private test certificate for your environment (if you don't have Azure ACS configured)
• Configure app isolation
• Run some PowerShell cmdlets
• (Optionally) Turn off the HTTPS requirement for OAuth in your dev environment
• Create a new provider-hosted app in Visual Studio, configured to use a certificate for authentication

These steps are spelled out in much greater detail in the second half of this article. I have verified that they work with Preview 2 of the Microsoft Office Developer Tools for Visual Studio 2012, available for download here. (I mention this because Preview 2 of the Office Dev Tools was released after you posted this question.)

Answer 2

I don't know your sharepoint app is secure or not. I had same problem. fixed by updating start-up page from http:// to https:// in AppManifest.xml

<StartPage>https://sampledemonamexx.azurewebsites.net/Default.aspx?{StandardTokens}</StartPage>