(Unicode C++) Banco Inter OAuth2 Client Credentials

Generate an OAuth2 access token needed to consume the Inter APIs.

For more information, see https://developers.bancointer.com.br/reference/token-3

Chilkat C/C++ Library Downloads
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#include <CkHttpW.h>
#include <CkCertW.h>
#include <CkBinDataW.h>
#include <CkPrivateKeyW.h>
#include <CkHttpRequestW.h>
#include <CkHttpResponseW.h>
#include <CkJsonObjectW.h>

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

    CkHttpW http;
    bool success;

    // First load the certificate and private key, and set as the HTTP object's client certificate.
    CkCertW cert;
    success = cert.LoadFromFile(L"<nome arquivo certificado>.crt");
    if (success == false) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    CkBinDataW bdPrivKey;
    success = bdPrivKey.LoadFile(L"<nome arquivo chave privada>.key");
    if (success == false) {
        wprintf(L"Failed to load <nome\n");
        return;
    }

    CkPrivateKeyW privKey;
    success = privKey.LoadAnyFormat(bdPrivKey,L"");
    if (success == false) {
        wprintf(L"%s\n",privKey.lastErrorText());
        return;
    }

    success = cert.SetPrivateKey(privKey);
    if (success == false) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    success = http.SetSslClientCert(cert);
    if (success == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    CkHttpRequestW req;
    req.put_HttpVerb(L"POST");
    req.put_Path(L"/oauth/v2/token");
    req.put_ContentType(L"application/x-www-form-urlencoded");
    req.AddParam(L"grant_type",L"client_credentials");
    // Requested scopes in OAuth2 are typically SPACE separated.
    req.AddParam(L"scope",L"boleto-cobranca.read boleto-cobranca.write");
    req.AddHeader(L"accept",L"application/json");

    CkHttpResponseW *resp = http.PostUrlEncoded(L"https://cdpj.partners.bancointer.com.br/oauth/v2/token",req);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    CkJsonObjectW jResp;
    resp->GetBodyJson(jResp);
    jResp.put_EmitCompact(false);

    wprintf(L"Response Body:\n");
    wprintf(L"%s\n",jResp.emit());

    int respStatusCode = resp->get_StatusCode();
    wprintf(L"Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",resp->header());
        wprintf(L"Failed.\n");
        delete resp;
        return;
    }

    delete resp;

    success = jResp.WriteFile(L"qa_data/tokens/banco_inter_client_credentials.json");
    if (success == false) {
        wprintf(L"Failed to save JSON access token file.\n");
        return;
    }

    wprintf(L"Success.\n");
    }