(VB.NET UWP/WinRT) Google Drive - Upload File

This example demonstrates how to upload a file to Google Drive. The assumption is that the file can be loaded into memory and uploaded. It is also possible to stream large files to Google Drive, but the code required is a little more complex.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

Dim success As Boolean = True

' This example 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. 
' See Get Google Drive OAuth2 Access Token

Dim gAuth As New Chilkat.AuthGoogle
gAuth.AccessToken = "GOOGLE_DRIVE_ACCESS_TOKEN"

Dim rest As New Chilkat.Rest

' Connect using TLS.
Dim bAutoReconnect As Boolean = True
success = Await rest.ConnectAsync("www.googleapis.com",443,True,bAutoReconnect)

' Provide the authentication credentials (i.e. the access token)
rest.SetAuthGoogle(gAuth)

' -------------------------------------------------------------------------
' A multipart upload to Google Drive needs a multipart/related Content-Type
rest.AddHeader("Content-Type","multipart/related")

' Specify each part of the request.

' The 1st part is JSON with information about the file.
rest.PartSelector = "1"
rest.AddHeader("Content-Type","application/json; charset=UTF-8")

' Construct the JSON that will contain the metadata about the file data to be uploaded...
Dim json As New Chilkat.JsonObject
json.AppendString("name","starfish.jpg")
json.AppendString("description","A picture of a starfish.")
json.AppendString("mimeType","image/jpeg")

' To place the file in a folder, we must add a parents[] array to the JSON
' and add the folder ID.  
' In a previous example (see Lookup Google Drive Folder ID
' we showed how to find the folder ID for a folder in Google Drive.

' Use the folder ID we already looked up..
Dim folderId As String = "1Fksv-TfA1ILii1YjXsNa1-rDu8Cdrg72"
Dim parents As Chilkat.JsonArray = json.AppendArray("parents")
parents.AddStringAt(-1,folderId)


rest.SetMultipartBodyString(json.Emit())

' The 2nd part is the file content, which will contain the binary image data.
rest.PartSelector = "2"
rest.AddHeader("Content-Type","image/jpeg")

Dim jpgBytes As New Chilkat.BinData
success = jpgBytes.LoadFile("qa_data/jpg/starfish.jpg")

' Add the data to our upload
rest.SetMultipartBodyBd(jpgBytes)

Dim jsonResponse As String = Await rest.FullRequestMultipartAsync("POST","/upload/drive/v3/files?uploadType=multipart")
If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    Debug.WriteLine("response status code = " & rest.ResponseStatusCode)
    Debug.WriteLine("response status text = " & rest.ResponseStatusText)
    Debug.WriteLine("response header: " & rest.ResponseHeader)
    Debug.WriteLine("response JSON: " & jsonResponse)
    Exit Sub
End If


json.Load(jsonResponse)

' Show the full JSON response.
json.EmitCompact = False
Debug.WriteLine(json.Emit())

' A successful response looks like this:
' {
'   "kind": "drive#file",
'   "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
'   "name": "starfish.jpg",
'   "mimeType": "image/jpeg"
' }

' Get the fileId:
Debug.WriteLine("fileId: " & json.StringOf("id"))