(VB.NET) OneDrive -- Download Text File to Memory

Downloads a text file (such as XML, JSON, plain-text, HTML, etc.) into a StringBuilder object.

Note: This example requires Chilkat v9.5.0.97 or greater.

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

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

' This example uses the OAuth client credentials flow.
' See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

' Use your client ID, client secret, and tenant ID in the following lines
Dim json As New Chilkat.JsonObject
json.UpdateString("client_id","2871da2c-8176-4b7f-869b-2311aa82e743")
json.UpdateString("client_secret","2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH")
json.UpdateString("scope","https://graph.microsoft.com/.default")
json.UpdateString("token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token")

Dim http As New Chilkat.Http
http.AuthToken = json.Emit()


' Sends the following GET request:
' GET https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{item-path}:/content

' Make sure to automatically follow redirects
http.FollowRedirects = True

' This example will download /Misc/hamlet.xml
http.SetUrlVar("item_path","Misc/hamlet.xml")
http.SetUrlVar("user_id","4fe732c3-322e-4a6b-b729-2fd1eb5c6104")

Dim sbXml As New Chilkat.StringBuilder
Dim expectedCharset As String = "utf-8"
Dim url As String = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{$item_path}:/content"
Dim success As Boolean = http.DownloadSb(url,expectedCharset,sbXml)
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


' If the response status code was not 200, then it failed.
If (http.LastStatus <> 200) Then
    Debug.WriteLine("Response Status Code = " & http.LastStatus)
    Debug.WriteLine("Failed.")
    Exit Sub
End If


' If we got here, then the file was successfully downloaded.
Debug.WriteLine("Download from OneDrive successful.")
Debug.WriteLine("The file is contained in sbXml.")