(VB.NET) curl with OAuth2 Client Credentials

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This example shows how to run a simple CURL command with an OAuth2 access token for authorization. We use CURL to retrieve a SharePoint site ID, and Chilkat automatically fetches the OAuth2 access token using the provided credentials.

Note: This example requires Chilkat v11.5.0 or greater.

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Dim success As Boolean = False

' This example will run the following curl command

' curl -X GET "https://graph.microsoft.com/v1.0/sites/{{sharepoint_hostname}}:/sites/{{site_name}}" \
'   -H "Authorization: Bearer ACCESS_TOKEN" \
'   -H "Accept: application/json"

Dim sb As New Chilkat.StringBuilder
sb.AppendLn("curl -X GET ""https://graph.microsoft.com/v1.0/sites/{{sharepoint_hostname}}:/sites/{{site_name}}"" \")
sb.AppendLn("  -H ""Authorization: Bearer ACCESS_TOKEN"" \")
sb.AppendLn("  -H ""Accept: application/json""")

' Build the JSON that provides information for getting the OAuth2 access token using the OAuth2 client credentials flow.
Dim jsonOAuth2 As New Chilkat.JsonObject

jsonOAuth2.UpdateString("oauth2.client_id","CLIENT_ID")
jsonOAuth2.UpdateString("oauth2.client_secret","CLIENT_SECRET")
jsonOAuth2.UpdateString("oauth2.scope","https://graph.microsoft.com/.default")
jsonOAuth2.UpdateString("oauth2.token_endpoint","https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token")

Dim httpCurl As New Chilkat.HttpCurl

' Provide the information for getting the OAuth2 access token from the token endpoint
' Note: The Authorization header specified in the curl command will be ignored and replaced using the OAuth2 access token obtained at runtime from the token endpoint.
httpCurl.SetAuth(jsonOAuth2)

' The placeholders {{sharepoint_hostname}} and {{site_name}} represent variables that must be defined before execution.
' When DoYourThing runs the curl command, it automatically substitutes these placeholders with their corresponding values.
' Below are the values assigned to these variables:
httpCurl.SetVar("sharepoint_hostname","example.sharepoint.com")
httpCurl.SetVar("site_name","test")

' Run the curl command.
success = httpCurl.DoYourThing(sb.GetAsString())
If (success = False) Then
    Debug.WriteLine(httpCurl.LastErrorText)
    Exit Sub
End If


Dim responseJson As New Chilkat.JsonObject
responseJson.EmitCompact = False

httpCurl.GetResponseJson(responseJson)

Dim statusCode As Integer = httpCurl.StatusCode
Debug.WriteLine("response status code: " & statusCode)

Debug.WriteLine(responseJson.Emit())