Classic ASP

SharePoint OAuth2 Client Credentials Authentication

Demonstrates how to authenticate with OAuth 2.0 using the client credentials grant type. This is for SharePoint Online which is the cloud-based service provided by Microsoft as part of Office 365. (Users access SharePoint Online through a web browser, and the service is hosted on Microsoft's servers.)

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

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

set http = Server.CreateObject("Chilkat.Http")

' Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
' access token as needed.
set jsonOAuthCC = Server.CreateObject("Chilkat.JsonObject")

' --------------------------------------------------------------------------------------------------------
' You'll need to have registered an app in Azure beforehand.
' See How to Create SharePoint App Registration for OAuth 2.0 Client Credentials
' --------------------------------------------------------------------------------------------------------

' Use the values from your App Registration in Azure.
success = jsonOAuthCC.UpdateString("client_id","CLIENT_ID")
success = jsonOAuthCC.UpdateString("client_secret","SECRET_VALUE")

' You'll always use this scope for client credentials, because the allowed actions
' are determined by the App Permissions defined when you registered the app in Azure.
success = jsonOAuthCC.UpdateString("scope","https://graph.microsoft.com/.default")

' The token endpoint includes your tenant ID. 
success = jsonOAuthCC.UpdateString("token_endpoint","https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token")

' Provide the OAuth2 information. Chilkat will use this information to automatically fetch the OAuth2 access token as needed,
http.AuthToken = jsonOAuthCC.Emit()

' Get information about all SharePoint sites.
set sbJson = Server.CreateObject("Chilkat.StringBuilder")
success = http.QuickGetSb("https://graph.microsoft.com/v1.0/sites/getAllSites",sbJson)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( http.LastErrorText) & "</pre>"
    Response.End
End If

statusCode = http.LastStatus

Response.Write "<pre>" & Server.HTMLEncode( "Response status code = " & statusCode) & "</pre>"

If (statusCode <> 200) Then
    Response.Write "<pre>" & Server.HTMLEncode( sbJson.GetAsString()) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "Failed.") & "</pre>"
    Response.End
End If

set jsonResp = Server.CreateObject("Chilkat.JsonObject")
success = jsonResp.LoadSb(sbJson)
jsonResp.EmitCompact = 0

Response.Write "<pre>" & Server.HTMLEncode( jsonResp.Emit()) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "Success.") & "</pre>"

' Use this online tool to generate parsing code from sample JSON: 
' Generate Parsing Code from JSON

%>
</body>
</html>