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(Visual Basic 6.0) SharePoint Rest API using OAuth
Demonstrates how to get an OAuth2 access token as described at How to access SharePoint Rest API using OAuth
Note: This example requires Chilkat v22.214.171.124 or greater.
' This example requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. Dim oauth2 As New ChilkatOAuth2 Dim success As Long ' The ListenPort should match the port in your localhost Reply URL of your Azure AD app. ' Your Reply URL must be exactly "http://localhost:LISTEN_PORT/" ' * Do not use "https" ' * Make sure the ending "/" is included. ' * You may choose any port number that doesn't collide with anything else. oauth2.ListenPort = 3017 oauth2.AuthorizationEndpoint = "https://login.microsoftonline.com/TENANT_ID/oauth2/authorize" oauth2.TokenEndpoint = "https://login.windows.net/TENANT_ID/oauth2/token?api-version=1.0" ' Replace these with actual values. ' Use the application ID oauth2.ClientId = "CLIENT_ID" ' Use the password oauth2.ClientSecret = "CLIENT_SECRET" oauth2.CodeChallenge = 0 ' This example performs what is described here: How to access SharePoint Rest API using OAuth oauth2.Scope = "openid" oauth2.Resource = "https://graph.microsoft.com/" ' The following three properties were added in Chilkat v126.96.36.199 oauth2.IncludeNonce = 1 oauth2.ResponseMode = "form_post" oauth2.ResponseType = "id_token+code" ' Begin the OAuth2 three-legged flow. This returns a URL that should be loaded in a browser. Dim url As String url = oauth2.StartAuth() If (oauth2.LastMethodSuccess <> 1) Then Debug.Print oauth2.LastErrorText Exit Sub End If ' At this point, your application should load the URL in a browser. ' For example, ' in C#: System.Diagnostics.Process.Start(url); ' in Java: Desktop.getDesktop().browse(new URI(url)); ' in VBScript: Set wsh=WScript.CreateObject("WScript.Shell") ' wsh.Run url ' The LinkedIn account owner would interactively accept or deny the authorization request. ' Add the code to load the url in a web browser here... ' Add the code to load the url in a web browser here... ' Add the code to load the url in a web browser here... ' Now wait for the authorization. ' We'll wait for a max of 30 seconds. Dim numMsWaited As Long numMsWaited = 0 Do While (numMsWaited < 30000) And (oauth2.AuthFlowState < 3) oauth2.SleepMs 100 numMsWaited = numMsWaited + 100 Loop ' If there was no response from the browser within 30 seconds, then ' the AuthFlowState will be equal to 1 or 2. ' 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser. ' 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response. ' In that case, cancel the background task started in the call to StartAuth. If (oauth2.AuthFlowState < 3) Then success = oauth2.Cancel() Debug.Print "No response from the browser!" Exit Sub End If ' Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred ' The possible AuthFlowState values are: ' 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property. ' 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property. ' 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property. If (oauth2.AuthFlowState = 5) Then Debug.Print "OAuth2 failed to complete." Debug.Print oauth2.FailureInfo Exit Sub End If If (oauth2.AuthFlowState = 4) Then Debug.Print "OAuth2 authorization was denied." Debug.Print oauth2.AccessTokenResponse Exit Sub End If If (oauth2.AuthFlowState <> 3) Then Debug.Print "Unexpected AuthFlowState:" & oauth2.AuthFlowState Exit Sub End If Debug.Print "OAuth2 authorization granted!" Debug.Print "Access Token = " & oauth2.AccessToken
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