C#

Azure OAuth2 Client Credentials Grant Flow

See more OAuth2 Examples

Demonstrates how to get an OAuth2 access token for an Azure Registered App using the Client Credentials Grant Flow.

Note: Your Azure app must be registered as a single-tenant app to use client credentials.

C#

bool success = false;

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

Chilkat.Http http = new Chilkat.Http();

Chilkat.HttpRequest req = new Chilkat.HttpRequest();
req.AddParam("client_secret","CLIENT_SECRET");
req.AddParam("client_id","CLIENT_ID");

// See Understanding Scopes in Azure OAuth2 Client Credentials Flow
req.AddParam("scope","https://graph.microsoft.com/.default");

req.AddParam("grant_type","client_credentials");

// Note: Your Azure app must be registered as a single-tenant app to use client credentials.
// Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
string url = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token";

req.HttpVerb = "POST";
req.ContentType = "application/x-www-form-urlencoded";

Chilkat.HttpResponse resp = new Chilkat.HttpResponse();
success = http.HttpReq(url,req,resp);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

int statusCode = resp.StatusCode;
Debug.WriteLine("Response status code = " + Convert.ToString(statusCode));

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.Load(resp.BodyStr);

json.EmitCompact = false;
Debug.WriteLine(json.Emit());

// Sample successful output:

// {
//   "token_type": "Bearer",
//   "expires_in": 3599,
//   "ext_expires_in": 3599,
//   "access_token": "eyJ0eX...K0jOERg"
// }

if (statusCode == 200) {
    json.WriteFile("qa_data/tokens/azureClientCredentialsToken.json");
    Debug.WriteLine("Success.");
}
else {
    Debug.WriteLine("Failed.");
}