(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 <CkHttp.h>
#include <CkCert.h>
#include <CkBinData.h>
#include <CkPrivateKey.h>
#include <CkHttpRequest.h>
#include <CkHttpResponse.h>
#include <CkJsonObject.h>

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

    CkHttp http;
    bool success;

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

    CkBinData bdPrivKey;
    success = bdPrivKey.LoadFile("<nome arquivo chave privada>.key");
    if (success == false) {
        std::cout << "Failed to load <nome" << "\r\n";
        return;
    }

    CkPrivateKey privKey;
    success = privKey.LoadAnyFormat(bdPrivKey,"");
    if (success == false) {
        std::cout << privKey.lastErrorText() << "\r\n";
        return;
    }

    success = cert.SetPrivateKey(privKey);
    if (success == false) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    success = http.SetSslClientCert(cert);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

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

    CkHttpResponse *resp = http.PostUrlEncoded("https://cdpj.partners.bancointer.com.br/oauth/v2/token",req);
    if (http.get_LastMethodSuccess() == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

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

    std::cout << "Response Body:" << "\r\n";
    std::cout << jResp.emit() << "\r\n";

    int respStatusCode = resp->get_StatusCode();
    std::cout << "Response Status Code = " << respStatusCode << "\r\n";
    if (respStatusCode >= 400) {
        std::cout << "Response Header:" << "\r\n";
        std::cout << resp->header() << "\r\n";
        std::cout << "Failed." << "\r\n";
        delete resp;
        return;
    }

    delete resp;

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

    std::cout << "Success." << "\r\n";
    }