(Visual Basic 6.0) Google Drive - Upload File

See more Google Drive Examples

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.

For more information, see https://developers.google.com/drive/api/guides/manage-uploads#http_1

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

Dim success As Long
success = 1

' 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 ChilkatAuthGoogle
gAuth.AccessToken = "GOOGLE_DRIVE_ACCESS_TOKEN"

Dim rest As New ChilkatRest

' Connect using TLS.
Dim bAutoReconnect As Long
bAutoReconnect = 1
success = rest.Connect("www.googleapis.com",443,1,bAutoReconnect)

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

' -------------------------------------------------------------------------
' A multipart upload to Google Drive needs a multipart/related Content-Type
success = 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"
success = 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 ChilkatJsonObject
success = json.AppendString("name","starfish.jpg")
success = json.AppendString("description","A picture of a starfish.")
success = 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
folderId = "1Fksv-TfA1ILii1YjXsNa1-rDu8Cdrg72"
Dim parents As ChilkatJsonArray
Set parents = json.AppendArray("parents")
success = parents.AddStringAt(-1,folderId)

success = rest.SetMultipartBodyString(json.Emit())

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

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

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

Dim jsonResponse As String
jsonResponse = rest.FullRequestMultipart("POST","/upload/drive/v3/files?uploadType=multipart")
If (rest.LastMethodSuccess <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

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

success = json.Load(jsonResponse)

' Show the full JSON response.
json.EmitCompact = 0
Debug.Print json.Emit()

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

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