Visual Basic 6.0 Google Drive: Export File to Requested MIME Type (Export to PDF)

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Exports a Google Doc to the requested MIME type and returns the exported content. Please note that the exported content is limited to 10MB.
(Export only supports Google Docs) See https://developers.google.com/drive/v3/web/manage-downloads for a list of MIME types.

Documentation: https://developers.google.com/drive/v3/reference/files/export

Dim rest As New ChilkatRest
Dim success As Long

'   Provide a previously obtained OAuth2 access token.
Dim oauth2 As New ChilkatOAuth2
oauth2.AccessToken = "OAUTH2_ACCESS_TOKEN"
success = rest.SetAuthOAuth2(oauth2)

success = rest.Connect("www.googleapis.com",443,1,1)
If (success <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

success = rest.AddQueryParam("mimeType","application/pdf")

'  First send the HTTP request.
success = rest.SendReqNoBody("GET","/drive/v3/files/1zvzpTHO1dM9vNKYxpmr4YrX7x_R6qiNGFb8WB8h9wuI/export")
If (success <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

'  Read the response header.  If the response status code is success, stream to the file.
'  Otherwise receive the error response text.
Dim statusCode As Long
statusCode = rest.ReadResponseHeader()
If (statusCode < 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

If (statusCode <> 200) Then
    Debug.Print "Received error response code: " & statusCode
    '  Read the error response body.
    Dim sbErrResponse As New ChilkatStringBuilder
    success = rest.ReadRespSb(sbErrResponse)
    If (success <> 1) Then
        Debug.Print rest.LastErrorText
        Exit Sub
    End If

    Debug.Print "Error response:" & sbErrResponse.GetAsString()
    Exit Sub
End If

'  Stream the response body to the output file.
Dim respBodyStream As New ChilkatStream
respBodyStream.SinkFile = "/someDirectoryPath/test.pdf"
success = rest.ReadRespBodyStream(respBodyStream,1)
If (success <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

Debug.Print "Example Completed."