DataFlex

OneDrive -- List Large Directory

See more OneDrive Examples

Demonstrates how to get the entire collection of DriveItem children when the collection is large and multiple pages need to be requested. To test this example, I created a DriveItem with 450 children.

Note: This example requires Chilkat v9.5.0.97 or greater.

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoJson
    Handle hoHttp
    String sResp
    Integer i
    Integer iNumItems
    Boolean iBGetMore
    String sNextLink
    String sTemp1
    Integer iTemp1
    Boolean bTemp1

    Move False To iSuccess

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

    // This example uses the OAuth client credentials flow.
    // See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

    // Use your client ID, client secret, and tenant ID in the following lines
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComUpdateString Of hoJson "client_id" "2871da2c-8176-4b7f-869b-2311aa82e743" To iSuccess
    Get ComUpdateString Of hoJson "client_secret" "2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH" To iSuccess
    Get ComUpdateString Of hoJson "scope" "https://graph.microsoft.com/.default" To iSuccess
    Get ComUpdateString Of hoJson "token_endpoint" "https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token" To iSuccess

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End
    Get ComEmit Of hoJson To sTemp1
    Set ComAuthToken Of hoHttp To sTemp1

    // This example will get the DriveItems in /lots-of-files, which has 450 children..
    Get ComSetUrlVar Of hoHttp "item_path" "/lots-of-files" To iSuccess
    Get ComSetUrlVar Of hoHttp "user_id" "4fe732c3-322e-4a6b-b729-2fd1eb5c6104" To iSuccess

    Set ComEmitCompact Of hoJson To False

    // This loop will download DriveItems in sets of 25 until no more exist.
    Move True To iBGetMore
    // (Add the $top query parameter to define the page size, i.e. the max number of results to return).
    Move "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:{$item_path}:/children?$top=25" To sNextLink

    While (iBGetMore = True)

        // Get the next chunk of DriveItems
        Get ComQuickGetStr Of hoHttp sNextLink To sResp
        Get ComLastMethodSuccess Of hoHttp To bTemp1
        If (bTemp1 <> True) Begin
            Get ComLastErrorText Of hoHttp To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        // The response should be JSON.
        Get ComLoad Of hoJson sResp To iSuccess

        // A successful response should return a status code of 200.
        Get ComLastStatus Of hoHttp To iTemp1
        If (iTemp1 <> 200) Begin
            Get ComEmit Of hoJson To sTemp1
            Showln sTemp1
            Get ComLastStatus Of hoHttp To iTemp1
            Showln "Response status = " iTemp1
            Procedure_Return
        End

        // Iterate over the DriveItems in the JSON response:
        Move 0 To i
        Get ComSizeOfArray Of hoJson "value" To iNumItems
        While (i < iNumItems)
            Set ComI Of hoJson To i
            Get ComStringOf Of hoJson "value[i].name" To sTemp1
            Showln "name: " sTemp1
            Move (i + 1) To i
        Loop

        // If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems.
        // Otherwise, exit the loop.
        Get ComHasMember Of hoJson '"@odata.nextLink"' To bTemp1
        If (bTemp1 = True) Begin
            Get ComStringOf Of hoJson '"@odata.nextLink"' To sNextLink
            Showln "nextLink: " sNextLink
        End
        Else Begin
            Move False To iBGetMore
        End

    Loop



End_Procedure