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++

#include <CkHttp.h>
#include <CkHttpRequest.h>
#include <CkHttpResponse.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkHttp http;

    CkHttpRequest req;
    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
    const char *url = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token";

    req.put_HttpVerb("POST");
    req.put_ContentType("application/x-www-form-urlencoded");

    CkHttpResponse resp;
    success = http.HttpReq(url,req,resp);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    int statusCode = resp.get_StatusCode();
    std::cout << "Response status code = " << statusCode << "\r\n";

    CkJsonObject json;
    json.Load(resp.bodyStr());

    json.put_EmitCompact(false);
    std::cout << json.emit() << "\r\n";

    // 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");
        std::cout << "Success." << "\r\n";
    }
    else {
        std::cout << "Failed." << "\r\n";
    }
    }