[resolved] How consuming a web service?

jeanrl

People I need to query a Web Service, but I have no experience in it. I've tried several ways, but I can't, if someone can give me a light will be very grateful.

The site that I read here:
https://apphom.correios.com.br/SigepMasterJPA/AtendeClienteService/AtendeCliente?wsdl

And using SoapUI I got to see all the services, one for you to have idea is this:

@
<soapenv: Envelope xmlns: soapenv = "http://schemas.xmlsoap.org/soap/envelope/" xmlns: cli = "http://cliente.bean.master.sigep.bsb.correios.com.br/" >
    <soapenv: Header />
    <soapenv: Body>
       <cli: buscaCliente>
          <idContrato> 9912208555 </ idContrato>
          <idCartaoPostagem> 0067594867 </ idCartaoPostagem>
          <User> SIGEP </ User>
          <password> n5f9t8 </ password>
       </ cli: buscaCliente>
    </ soapenv: Body>
</ soapenv: Envelope>
@

And the query via SoapUI works perfectly, so I know it's working, but do not know how to implement in Qt.

Thanks you all.

Solution:

@
QByteArray arr;
arr.append(leXML());

QNetworkRequest request;
request.setUrl(
          QUrl("https://apphom.correios.com.br/SigepMasterJPA/AtendeClienteService/AtendeCliente?wsdl"));
request.setHeader( QNetworkRequest::ContentTypeHeader,
                   QVariant( QString("text/xml;charset=utf-8")));
request.setHeader(QNetworkRequest::ContentLengthHeader,
                  QVariant( qulonglong(arr.size()) ));
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute,
                     QVariant( int(QNetworkRequest::AlwaysNetwork) ));
QSslConfiguration sslConf = request.sslConfiguration();
sslConf.setPeerVerifyMode(QSslSocket::VerifyNone);
request.setSslConfiguration(sslConf);


m_manager.post(request,arr);

connect(&m_manager,SIGNAL(finished(QNetworkReply*)),this,
            SLOT(slotRequestFinished(QNetworkReply*)));

@

andreyc

Take a look on "KD SOAP":http://www.kdab.com/kdab-products/kd-soap/

jeanrl

Thanks for the answers, but I ask another question:

Is not it better to use native or better KD Soap?

andreyc

What do you mean "native".
Qt does not have a built-in support for SOAP. You can implement it using "QtXml":http://qt-project.org/doc/qt-5/qtxml-index.html
Another option is to use third party solution. One of them is KDSOAP.

[quote author="jeanrl" date="1417466935"]
Is not it better to use native or better KD Soap?[/quote]
Do you want to implement SOAP yourself? If yes then "native" is the way. If not then use KDSOAP or other solutions.

jeanrl

It is thought that using the QNetworkmanager, QNetworkReply and QtXml I can do without third-party tools, but as I said before, I'm a little lost so I asked what the best option: Native or KDSOAP?

But both one way as the other I need an example, because I have no idea how to do.

Thanks.

andreyc

I think you need to familiarize yourself with SOAP.
After that you will be able to choose between doing it yourself or using thirdparty tools.
As for the examples: "kd soap example":https://github.com/KDAB/KDSoap/tree/master/examples
or "Qt networking and xml example":http://qt-project.org/doc/qt-5/qtnetwork-googlesuggest-example.html

jeanrl

Yes, you are correct, I need to familiarize myself with SOAP.

I'll see the two examples calmly to try to understand.

Again thank you for your attention.

PS I will not close the topic, it may appear more an opinion.

jeanrl

I'm trying to adapt the example proposed by friend here in this thread, but I'm having an error that I have no idea how to solve.

Can anyone tell me what's going on where I am going wrong?

Is giving error: "SSL handshake failed"

The code is:
@

Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);

networkManager.get(QNetworkRequest(QString("https://apphom.correios.com.br/SigepMasterJPA/AtendeClienteService/AtendeCliente?wsdl")));

connect(&networkManager, SIGNAL(finished(QNetworkReply*)),
        this, SLOT(slotRequestFinished(QNetworkReply*)));

}

void Widget::slotRequestFinished(QNetworkReply *networkReply)
{
qDebug() << "Chegou Final";

QUrl url = networkReply->url();

if (!networkReply->error())
{
    QStringList choices;
    QStringList hits;

    QByteArray response(networkReply->readAll());

    qDebug() << "response " << response;


    QXmlStreamReader xml(response);
    while (!xml.atEnd()) {
        xml.readNext();
        
        qDebug() < ...;

    }
}
else
    qDebug() << "erro no reply " << networkReply->errorString();


networkReply->deleteLater();

}
@

Thanks.

andreyc

Firefox says:
@
apphom.correios.com.br uses an invalid security certificate. The certificate is not trusted because no issuer chain was provided. (Error code: sec_error_unknown_issuer)
@
If you know this site and does not worry about wrong certificate then you can disable SSL verification for now.
@
QNetworkRequest request(QString("https://apphom.correios.com.br/SigepMasterJPA/AtendeClienteService/AtendeCliente?wsdl");
QSslConfiguration sslConf = request.sslConfiguration();
sslConf.setPeerVerifyMode(QSslSocket::VerifyNone);
request.setSslConfiguration(sslConf);
networkManager.get(request);
@

jeanrl

Perfect, it worked.
This site is the postal service here in Brazil, so no problems with the certificate.

One more question:

In that reply I have all the services available, but how do I consume these services? I know I have to send a xml with the parameters, but do not know how, can you give me an idea of how to do this?

Thank you very much.

P.S. I'm sorry if I seem to be taking advantage, is not found virtually no material on the Internet, especially for those who have no experience with Web Service with Qt.

andreyc

I never used SOAP in practice so don't know exactly.
I guess you need to send a request to some url with an XML body that has parameters.

jeanrl

Ok Andreyc

You helped me a lot.

Thanks very mouch.

jeanrl

It finally worked:

@
QNetworkRequest request;
request.setUrl(
QUrl("https://apphom.correios.com.br/SigepMasterJPA/AtendeClienteService/AtendeCliente?wsdl"));
request.setHeader( QNetworkRequest::ContentTypeHeader,
QVariant( QString("text/xml;charset=utf-8")));
request.setHeader(QNetworkRequest::ContentLengthHeader,
QVariant( qulonglong(arr.size()) ));
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute,
QVariant( int(QNetworkRequest::AlwaysNetwork) ));
QSslConfiguration sslConf = request.sslConfiguration();
sslConf.setPeerVerifyMode(QSslSocket::VerifyNone);
request.setSslConfiguration(sslConf);

m_manager.post(request,xml);

connect(&m_manager,SIGNAL(finished(QNetworkReply*)),this,
            SLOT(slotRequestFinished(QNetworkReply*)));

@

Thanks again Andreyc.

andreyc

Thank you for sharing a solution.