(DataFlex) List Files in Google Drive

Demonstrates how to list files in Google Drive.

See Google Drive Files list for more optional HTTP parameters.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vGAuth
    Handle hoGAuth
    Handle hoRest
    Boolean iBAutoReconnect
    String sJsonResponse
    Handle hoJson
    Integer iNumFiles
    Integer i
    String sTemp1
    Integer iTemp1
    Boolean bTemp1

    Move True To iSuccess

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

    // This example uses a previously obtained access token having permission for the 
    // Google Drive scope.

    Get Create (RefClass(cComChilkatAuthGoogle)) To hoGAuth
    If (Not(IsComObjectCreated(hoGAuth))) Begin
        Send CreateComObject of hoGAuth
    End
    Set ComAccessToken Of hoGAuth To "GOOGLE-DRIVE-ACCESS-TOKEN"

    Get Create (RefClass(cComChilkatRest)) To hoRest
    If (Not(IsComObjectCreated(hoRest))) Begin
        Send CreateComObject of hoRest
    End

    // Connect using TLS.
    Move True To iBAutoReconnect
    Get ComConnect Of hoRest "www.googleapis.com" 443 True iBAutoReconnect To iSuccess

    // Provide the authentication credentials (i.e. the access token)
    Get pvComObject of hoGAuth to vGAuth
    Get ComSetAuthGoogle Of hoRest vGAuth To iSuccess

    // Get 4 results per page.  (The default page size is 100, with a max of 1000.
    Get ComAddQueryParam Of hoRest "pageSize" "4" To iSuccess

    // This uses the Google Drive V3 API... (not V2)
    Get ComFullRequestNoBody Of hoRest "GET" "/drive/v3/files" To sJsonResponse
    Get ComLastMethodSuccess Of hoRest To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoRest To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // A successful response will have a status code equal to 200.
    Get ComResponseStatusCode Of hoRest To iTemp1
    If (iTemp1 <> 200) Begin
        Get ComLastRequestHeader Of hoRest To sTemp1
        Showln "request header = " sTemp1
        Get ComResponseStatusCode Of hoRest To iTemp1
        Showln "response status code = " iTemp1
        Get ComResponseStatusText Of hoRest To sTemp1
        Showln "response status text = " sTemp1
        Get ComResponseHeader Of hoRest To sTemp1
        Showln "response header: " sTemp1
        Showln "response JSON: " sJsonResponse
        Procedure_Return
    End

    // A successful response looks like this:
    // {
    //  "kind": "drive#fileList",
    //  "files": [
    //    {
    //      "kind": "drive#file",
    //      "id": "0B53Q6OSTWYolenpjTEU4ekJlQUU",
    //      "name": "test",
    //      "mimeType": "application/vnd.google-apps.folder"
    //    },
    //    {
    //      "kind": "drive#file",
    //      "id": "0B53Q6OSTWYolRm4ycjZtdXhRaEE",
    //      "name": "starfish4.jpg",
    //      "mimeType": "image/jpeg"
    //    },
    //    {
    //      "kind": "drive#file",
    //      "id": "0B53Q6OSTWYolMWt2VzN0Qlo1UjA",
    //      "name": "hamlet2.xml",
    //      "mimeType": "text/xml"
    //    },
    // ...
    //    {
    //      "kind": "drive#file",
    //      "id": "0B53Q6OSTWYolc3RhcnRlcl9maWxlX2Rhc2hlclYw",
    //      "name": "Getting started",
    //      "mimeType": "application/pdf"
    //    }
    //  ]
    // }

    // Iterate over each file in the response and show the name, id, and mimeType.
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComLoad Of hoJson sJsonResponse To iSuccess

    // Show the full JSON response.
    Set ComEmitCompact Of hoJson To False
    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1

    Get ComSizeOfArray Of hoJson "files" To iNumFiles
    Move 0 To i
    While (i < iNumFiles)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "files[i].name" To sTemp1
        Showln "name: " sTemp1
        Get ComStringOf Of hoJson "files[i].id" To sTemp1
        Showln "id: " sTemp1
        Get ComStringOf Of hoJson "files[i].mimeType" To sTemp1
        Showln "mimeType: " sTemp1
        Showln "-"
        Move (i + 1) To i
    Loop



End_Procedure