(VB.NET) Initiate Resumable Upload Session

See more Google Cloud Storage Examples

For more information, see https://cloud.google.com/storage/docs/performing-resumable-uploads

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim http As New Chilkat.Http

Dim jsonToken As New Chilkat.JsonObject
Dim success As Boolean = jsonToken.LoadFile("qa_data/tokens/googleCloudStorage.json")
If (success = False) Then
    Debug.WriteLine(jsonToken.LastErrorText)
    Exit Sub
End If


Dim jsonMetaData As New Chilkat.JsonObject
jsonMetaData.UpdateString("contentType","image/jpeg")

' Adds the "Authorization: Bearer <access_token>" header..
http.AuthToken = jsonToken.StringOf("access_token")

http.SetUrlVar("bucket_name","chilkat-bucket-b")
http.SetUrlVar("object_name","penguins2.jpg")
Dim url As String = "https://storage.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=resumable&name={$object_name}"
Dim resp As Chilkat.HttpResponse = http.PText("POST",url,jsonMetaData.Emit(),"utf-8","application/json",False,False)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim statusCode As Integer = resp.StatusCode
Debug.WriteLine("response status code = " & statusCode)

Dim sessionUrl As String = ""

If (statusCode <> 200) Then
    Debug.WriteLine(resp.BodyStr)
Else
    ' The session URL will be used to upload the file in chunks, in subsequent HTTP POSTs...
    sessionUrl = resp.GetHeaderField("Location")
    Debug.WriteLine("Session URL = " & sessionUrl)
End If