Xojo Plugin

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.) Xojo Plugin

Dim success As Boolean
success = False

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

Dim http As New Chilkat.Http

// Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
// access token as needed.
Dim jsonOAuthCC As New 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.
Dim sbJson As New Chilkat.StringBuilder
success = http.QuickGetSb("https://graph.microsoft.com/v1.0/sites/getAllSites",sbJson)
If (success = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

Dim statusCode As Int32
statusCode = http.LastStatus

System.DebugLog("Response status code = " + Str(statusCode))

If (statusCode <> 200) Then
    System.DebugLog(sbJson.GetAsString())
    System.DebugLog("Failed.")
    Return
End If

Dim jsonResp As New Chilkat.JsonObject
success = jsonResp.LoadSb(sbJson)
jsonResp.EmitCompact = False

System.DebugLog(jsonResp.Emit())
System.DebugLog("Success.")

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