(C++) Dynamics CRM Oauth2 Client Credentials

Get an OAuth2 access token for Dynamics CRM using client credentials.

Chilkat C/C++ Library Downloads
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#include <CkHttp.h>
#include <CkHttpRequest.h>
#include <CkHttpResponse.h>
#include <CkJsonObject.h>

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

    CkHttp http;

    // Pass the client ID/secret using Basic HTTP authentication.
    http.put_Login("CLIENT_ID");
    http.put_Password("CLIENT_SECRET");
    http.put_BasicAuth(true);

    CkHttpRequest req;
    req.AddParam("client_secret","CLIENT_SECRET");
    req.AddParam("client_id","CLIENT_ID");
    req.AddParam("scope","https://yourdynamicsdomain.crm3.dynamics.com/.default");
    req.AddParam("grant_type","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";
    CkHttpResponse *resp = http.PostUrlEncoded(url,req);
    if (http.get_LastMethodSuccess() != true) {
        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());
    delete resp;

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

    if (statusCode == 200) {
        json.WriteFile("qa_data/tokens/dynamicsCrmClientCredentialsToken.json");
        std::cout << "Success." << "\r\n";
    }
    else {
        std::cout << "Failed." << "\r\n";
    }
    }