(PureBasic) 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 PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkBinData.pb"
IncludeFile "CkPrivateKey.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkHttpRequest.pb"
IncludeFile "CkHttpResponse.pb"
IncludeFile "CkCert.pb"

Procedure ChilkatExample()

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

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i

    ; First load the certificate and private key, and set as the HTTP object's client certificate.
    cert.i = CkCert::ckCreate()
    If cert.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkCert::ckLoadFromFile(cert,"<nome arquivo certificado>.crt")
    If success = 0
        Debug CkCert::ckLastErrorText(cert)
        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        ProcedureReturn
    EndIf

    bdPrivKey.i = CkBinData::ckCreate()
    If bdPrivKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkBinData::ckLoadFile(bdPrivKey,"<nome arquivo chave privada>.key")
    If success = 0
        Debug "Failed to load <nome"
        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        CkBinData::ckDispose(bdPrivKey)
        ProcedureReturn
    EndIf

    privKey.i = CkPrivateKey::ckCreate()
    If privKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPrivateKey::ckLoadAnyFormat(privKey,bdPrivKey,"")
    If success = 0
        Debug CkPrivateKey::ckLastErrorText(privKey)
        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        CkBinData::ckDispose(bdPrivKey)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    success = CkCert::ckSetPrivateKey(cert,privKey)
    If success = 0
        Debug CkCert::ckLastErrorText(cert)
        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        CkBinData::ckDispose(bdPrivKey)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    success = CkHttp::ckSetSslClientCert(http,cert)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        CkBinData::ckDispose(bdPrivKey)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    req.i = CkHttpRequest::ckCreate()
    If req.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttpRequest::setCkHttpVerb(req, "POST")
    CkHttpRequest::setCkPath(req, "/oauth/v2/token")
    CkHttpRequest::setCkContentType(req, "application/x-www-form-urlencoded")
    CkHttpRequest::ckAddParam(req,"grant_type","client_credentials")
    ; Requested scopes in OAuth2 are typically SPACE separated.
    CkHttpRequest::ckAddParam(req,"scope","boleto-cobranca.read boleto-cobranca.write")
    CkHttpRequest::ckAddHeader(req,"accept","application/json")

    resp.i = CkHttp::ckPostUrlEncoded(http,"https://cdpj.partners.bancointer.com.br/oauth/v2/token",req)
    If CkHttp::ckLastMethodSuccess(http) = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        CkBinData::ckDispose(bdPrivKey)
        CkPrivateKey::ckDispose(privKey)
        CkHttpRequest::ckDispose(req)
        ProcedureReturn
    EndIf

    jResp.i = CkJsonObject::ckCreate()
    If jResp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttpResponse::ckGetBodyJson(resp,jResp)
    CkJsonObject::setCkEmitCompact(jResp, 0)

    Debug "Response Body:"
    Debug CkJsonObject::ckEmit(jResp)

    respStatusCode.i = CkHttpResponse::ckStatusCode(resp)
    Debug "Response Status Code = " + Str(respStatusCode)
    If respStatusCode >= 400
        Debug "Response Header:"
        Debug CkHttpResponse::ckHeader(resp)
        Debug "Failed."
        CkHttpResponse::ckDispose(resp)

        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        CkBinData::ckDispose(bdPrivKey)
        CkPrivateKey::ckDispose(privKey)
        CkHttpRequest::ckDispose(req)
        CkJsonObject::ckDispose(jResp)
        ProcedureReturn
    EndIf

    CkHttpResponse::ckDispose(resp)

    success = CkJsonObject::ckWriteFile(jResp,"qa_data/tokens/banco_inter_client_credentials.json")
    If success = 0
        Debug "Failed to save JSON access token file."
        CkHttp::ckDispose(http)
        CkCert::ckDispose(cert)
        CkBinData::ckDispose(bdPrivKey)
        CkPrivateKey::ckDispose(privKey)
        CkHttpRequest::ckDispose(req)
        CkJsonObject::ckDispose(jResp)
        ProcedureReturn
    EndIf

    Debug "Success."


    CkHttp::ckDispose(http)
    CkCert::ckDispose(cert)
    CkBinData::ckDispose(bdPrivKey)
    CkPrivateKey::ckDispose(privKey)
    CkHttpRequest::ckDispose(req)
    CkJsonObject::ckDispose(jResp)


    ProcedureReturn
EndProcedure