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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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Local $bSuccess = False

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

$oHttp = ObjCreate("Chilkat.Http")

; Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
; access token as needed.
$oJsonOAuthCC = ObjCreate("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.
$oJsonOAuthCC.UpdateString("client_id","CLIENT_ID")
$oJsonOAuthCC.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.
$oJsonOAuthCC.UpdateString("scope","https://graph.microsoft.com/.default")

; The token endpoint includes your tenant ID. 
$oJsonOAuthCC.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,
$oHttp.AuthToken = $oJsonOAuthCC.Emit()

; Get information about all SharePoint sites.
$oSbJson = ObjCreate("Chilkat.StringBuilder")
$bSuccess = $oHttp.QuickGetSb("https://graph.microsoft.com/v1.0/sites/getAllSites",$oSbJson)
If ($bSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

Local $iStatusCode = $oHttp.LastStatus

ConsoleWrite("Response status code = " & $iStatusCode & @CRLF)

If ($iStatusCode <> 200) Then
    ConsoleWrite($oSbJson.GetAsString() & @CRLF)
    ConsoleWrite("Failed." & @CRLF)
    Exit
EndIf

$oJsonResp = ObjCreate("Chilkat.JsonObject")
$oJsonResp.LoadSb($oSbJson)
$oJsonResp.EmitCompact = False

ConsoleWrite($oJsonResp.Emit() & @CRLF)
ConsoleWrite("Success." & @CRLF)

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