(Unicode C) Azure OAuth2 Client Credentials Grant Flow

See more OAuth2 Examples

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

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-client-creds-grant-flow

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#include <C_CkHttpW.h>
#include <C_CkHttpRequestW.h>
#include <C_CkHttpResponseW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttpW http;
    HCkHttpRequestW req;
    const wchar_t *url;
    HCkHttpResponseW resp;
    int statusCode;
    HCkJsonObjectW json;

    success = FALSE;

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

    http = CkHttpW_Create();

    req = CkHttpRequestW_Create();
    CkHttpRequestW_AddParam(req,L"client_secret",L"CLIENT_SECRET");
    CkHttpRequestW_AddParam(req,L"client_id",L"CLIENT_ID");

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

    CkHttpRequestW_AddParam(req,L"grant_type",L"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
    url = L"https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token";

    CkHttpRequestW_putHttpVerb(req,L"POST");
    CkHttpRequestW_putContentType(req,L"application/x-www-form-urlencoded");

    resp = CkHttpResponseW_Create();
    success = CkHttpW_HttpReq(http,url,req,resp);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    statusCode = CkHttpResponseW_getStatusCode(resp);
    wprintf(L"Response status code = %d\n",statusCode);

    json = CkJsonObjectW_Create();
    CkJsonObjectW_Load(json,CkHttpResponseW_bodyStr(resp));

    CkJsonObjectW_putEmitCompact(json,FALSE);
    wprintf(L"%s\n",CkJsonObjectW_emit(json));

    // Sample successful output:

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

    if (statusCode == 200) {
        CkJsonObjectW_WriteFile(json,L"qa_data/tokens/azureClientCredentialsToken.json");
        wprintf(L"Success.\n");
    }
    else {
        wprintf(L"Failed.\n");
    }



    CkHttpW_Dispose(http);
    CkHttpRequestW_Dispose(req);
    CkHttpResponseW_Dispose(resp);
    CkJsonObjectW_Dispose(json);

    }