(Unicode C) Group: Refresh OAuth2 Access Token

Refreshes an expired or non-expired OAuth2 access token for the Microsoft Group REST API.

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

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObjectW json;
    HCkHttpRequestW req;
    HCkHttpW http;
    HCkHttpResponseW resp;
    HCkFileAccessW fac;

    success = FALSE;

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

    json = CkJsonObjectW_Create();
    success = CkJsonObjectW_LoadFile(json,L"qa_data/tokens/msGraphGroup.json");
    if (success != TRUE) {
        CkJsonObjectW_Dispose(json);
        return;
    }

    req = CkHttpRequestW_Create();
    CkHttpRequestW_AddParam(req,L"grant_type",L"refresh_token");
    CkHttpRequestW_AddParam(req,L"redirect_uri",L"http://localhost:3017/");
    CkHttpRequestW_AddParam(req,L"client_id",L"MICROSOFT-GRAPH-CLIENT-ID");
    CkHttpRequestW_AddParam(req,L"client_secret",L"MICROSOFT-GRAPH-CLIENT-SECRET");
    CkHttpRequestW_AddParam(req,L"refresh_token",CkJsonObjectW_stringOf(json,L"refresh_token"));
    CkHttpRequestW_AddParam(req,L"scope",L"openid profile offline_access user.readwrite group.readwrite.all files.readwrite");

    http = CkHttpW_Create();

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

    resp = CkHttpResponseW_Create();
    success = CkHttpW_HttpReq(http,L"https://login.microsoftonline.com/common/oauth2/v2.0/token",req,resp);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkJsonObjectW_Dispose(json);
        CkHttpRequestW_Dispose(req);
        CkHttpW_Dispose(http);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    // Load the JSON response.
    CkJsonObjectW_Load(json,CkHttpResponseW_bodyStr(resp));
    CkJsonObjectW_putEmitCompact(json,FALSE);

    // Show the JSON response.
    wprintf(L"%s\n",CkJsonObjectW_emit(json));

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

    // If the response status code is not 200, then it's an error.
    if (CkHttpResponseW_getStatusCode(resp) != 200) {
        CkJsonObjectW_Dispose(json);
        CkHttpRequestW_Dispose(req);
        CkHttpW_Dispose(http);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    // Save the refreshed access token JSON to a file for future requests.
    fac = CkFileAccessW_Create();
    CkFileAccessW_WriteEntireTextFile(fac,L"qa_data/tokens/msGraphGroup.json",CkJsonObjectW_emit(json),L"utf-8",FALSE);

    wprintf(L"Success.\n");


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

    }