Xojo Plugin Google Drive: Export File to Requested MIME Type (Export to PDF)

Back to Index

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 Chilkat.Rest
Dim success As Boolean

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

success = rest.Connect("www.googleapis.com",443,True,True)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

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

//  First send the HTTP request.
success = rest.SendReqNoBody("GET","/drive/v3/files/1zvzpTHO1dM9vNKYxpmr4YrX7x_R6qiNGFb8WB8h9wuI/export")
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
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 Int32
statusCode = rest.ReadResponseHeader()
If (statusCode < 0) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

If (statusCode <> 200) Then
    System.DebugLog("Received error response code: " + Str(statusCode))
    //  Read the error response body.
    Dim sbErrResponse As New Chilkat.StringBuilder
    success = rest.ReadRespSb(sbErrResponse)
    If (success <> True) Then
        System.DebugLog(rest.LastErrorText)
        Return
    End If

    System.DebugLog("Error response:" + sbErrResponse.GetAsString())
    Return
End If

//  Stream the response body to the output file.
Dim respBodyStream As New Chilkat.Stream
respBodyStream.SinkFile = "/someDirectoryPath/test.pdf"
success = rest.ReadRespBodyStream(respBodyStream,True)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

System.DebugLog("Example Completed.")