DataFlex

SharePoint OAuth2 Client Credentials Authentication

Demonstrates how to authenticate with OAuth 2.0 using the client credentials grant type. This is for SharePoint Online which is the cloud-based service provided by Microsoft as part of Office 365. (Users access SharePoint Online through a web browser, and the service is hosted on Microsoft's servers.) DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoHttp
    Handle hoJsonOAuthCC
    Variant vSbJson
    Handle hoSbJson
    Integer iStatusCode
    Handle hoJsonResp
    String sTemp1

    Move False To iSuccess

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End

    // Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
    // access token as needed.
    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonOAuthCC
    If (Not(IsComObjectCreated(hoJsonOAuthCC))) Begin
        Send CreateComObject of hoJsonOAuthCC
    End

    // --------------------------------------------------------------------------------------------------------
    // You'll need to have registered an app in Azure beforehand.
    // See How to Create SharePoint App Registration for OAuth 2.0 Client Credentials
    // --------------------------------------------------------------------------------------------------------

    // Use the values from your App Registration in Azure.
    Get ComUpdateString Of hoJsonOAuthCC "client_id" "CLIENT_ID" To iSuccess
    Get ComUpdateString Of hoJsonOAuthCC "client_secret" "SECRET_VALUE" To iSuccess

    // You'll always use this scope for client credentials, because the allowed actions
    // are determined by the App Permissions defined when you registered the app in Azure.
    Get ComUpdateString Of hoJsonOAuthCC "scope" "https://graph.microsoft.com/.default" To iSuccess

    // The token endpoint includes your tenant ID. 
    Get ComUpdateString Of hoJsonOAuthCC "token_endpoint" "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token" To iSuccess

    // Provide the OAuth2 information. Chilkat will use this information to automatically fetch the OAuth2 access token as needed,
    Get ComEmit Of hoJsonOAuthCC To sTemp1
    Set ComAuthToken Of hoHttp To sTemp1

    // Get information about all SharePoint sites.
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbJson
    If (Not(IsComObjectCreated(hoSbJson))) Begin
        Send CreateComObject of hoSbJson
    End
    Get pvComObject of hoSbJson to vSbJson
    Get ComQuickGetSb Of hoHttp "https://graph.microsoft.com/v1.0/sites/getAllSites" vSbJson To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComLastStatus Of hoHttp To iStatusCode

    Showln "Response status code = " iStatusCode

    If (iStatusCode <> 200) Begin
        Get ComGetAsString Of hoSbJson To sTemp1
        Showln sTemp1
        Showln "Failed."
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonResp
    If (Not(IsComObjectCreated(hoJsonResp))) Begin
        Send CreateComObject of hoJsonResp
    End
    Get pvComObject of hoSbJson to vSbJson
    Get ComLoadSb Of hoJsonResp vSbJson To iSuccess
    Set ComEmitCompact Of hoJsonResp To False

    Get ComEmit Of hoJsonResp To sTemp1
    Showln sTemp1
    Showln "Success."

    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON


End_Procedure