Qt 调用webService 接口

一，头文件

#include <QTimer>

#include <QThread>

#include <QNetworkAccessManager>

#include <QNetworkRequest>

#include <QNetworkReply>

class NetDataListenerThread:public QThread

{

    Q_OBJECT

public:

    NetDataListenerThread(QNetworkAccessManager *manager,QNetworkReply * reply,int timeoutms,QObject *parent = 0);

    ~NetDataListenerThread();

    QByteArray getBa() const;

    bool getIsWaitTimeOut() const;

protected:

    virtual void run();

private:

    bool waitForConnect();

protected slots:

    void slot_waitTimeout();

signals:

    void sig_waitTimeout();

private:

    QNetworkAccessManager *mManager;

    int m_TimeOutms;

    bool m_waitTimeOut;

    bool m_isWaitTimeOut;

    QNetworkReply * m_reply;

};

/**

 * @brief The WebServiceHelp class webservice调用帮助类

 * @author zp

 */

class   WebServiceHelp:public QObject

{

    Q_OBJECT

private:

    class Dispose

    {

    public:

        ~Dispose();

    };

public:

    static WebServiceHelp * getInstance();

public:

    /**

     * @brief sendGetRequest 发送Get请求

     * @param urlStr  url

     * @param ba      返回数据

     * @param timeOutms 超时时间

     * @return  返回错误代码

     */

    QNetworkReply::NetworkError sendGetRequest(QString urlStr, QByteArray & ba, int timeOutms=1000);

    /**

     * @brief sendPostRequest 发送post请求

     * @param website  网址

     * @param methodName 方法名称

     * @param param 参数

     * @param postBa    post数据

     * @param code      返回代码

     * @param message   返回信息

     * @param data      返回数据

     * @param timeOutms 超时时间

     * @return 返回错误代码

     */

    QNetworkReply::NetworkError sendPostRequest(QString website,const QByteArray & postBa, QByteArray& retBa, int timeOutms=1000);

protected slots:

    void slot_error(QNetworkReply::NetworkError code);

private:

    static WebServiceHelp * serverHelp;

    static WebServiceHelp::Dispose disp;

    QNetworkAccessManager *manager;

    QNetworkReply::NetworkError m_errCode;

private:

    WebServiceHelp(QObject *parent=0);

    ~WebServiceHelp();

};

二，源文件

NetDataListenerThread::NetDataListenerThread(QNetworkAccessManager *manager, QNetworkReply *reply, int timeoutms, QObject *parent)

    :QThread(parent),mManager(manager),m_TimeOutms(timeoutms),m_reply(reply)

{

    m_waitTimeOut = false;

    m_isWaitTimeOut = false;

}

NetDataListenerThread::~NetDataListenerThread()

{

}

void NetDataListenerThread::run()

{

    m_isWaitTimeOut = waitForConnect();

}

bool NetDataListenerThread::waitForConnect()

{

    QEventLoop eventLoop;

    QTimer * timer = NULL;

    m_waitTimeOut = false;

    bool bWaitTimeOut = false;

    if (m_TimeOutms > 0)

    {

        timer = new QTimer;

        connect(timer, SIGNAL(timeout()), this, SLOT(slot_waitTimeout()));

        timer->setSingleShot(true);

        timer->start(m_TimeOutms);

        connect(this, SIGNAL(sig_waitTimeout()), &eventLoop, SLOT(quit()));

    }

    connect(mManager, SIGNAL(finished(QNetworkReply *)), &eventLoop, SLOT(quit()));

    if (m_reply != NULL)

    {

        connect(m_reply, SIGNAL(readyRead()), &eventLoop, SLOT(quit()));

    }

    eventLoop.exec();

    if (timer != NULL)

    {

        timer->stop();

        delete timer;

        timer = NULL;

    }

    bWaitTimeOut = m_waitTimeOut;

    m_waitTimeOut = false;

    return !bWaitTimeOut;

}

void NetDataListenerThread::slot_waitTimeout()

{

    m_waitTimeOut = true;

    emit sig_waitTimeout();

}

bool NetDataListenerThread::getIsWaitTimeOut() const

{

    return m_isWaitTimeOut;

}

WebServiceHelp * WebServiceHelp::serverHelp = NULL;

WebServiceHelp::Dispose WebServiceHelp::disp;

WebServiceHelp::WebServiceHelp(QObject *parent):QObject(parent)

{

    manager = new QNetworkAccessManager();

    m_errCode= QNetworkReply::NoError;

}

WebServiceHelp::~WebServiceHelp()

{

    manager->deleteLater();

}

WebServiceHelp *WebServiceHelp::getInstance()

{

    if(serverHelp==NULL)

    {

        serverHelp = new WebServiceHelp();

    }

    return serverHelp;

}

QNetworkReply::NetworkError WebServiceHelp::sendGetRequest(QString urlStr, QByteArray & ba,int timeOutms)

{

    QNetworkReply::NetworkError retError = QNetworkReply::NoError;

    m_errCode= QNetworkReply::NoError;

    QNetworkRequest request;

    QUrl url(urlStr);

    request.setUrl(url);

    QNetworkReply *reply = manager->get(request);

    connect(reply,static_cast<void (QNetworkReply::*)(QNetworkReply::NetworkError)>(&QNetworkReply::error),this,&WebServiceHelp::slot_error);

    QEventLoop eventLoop;

    NetDataListenerThread * thread = new NetDataListenerThread(manager,reply,timeOutms);

    connect(thread, &NetDataListenerThread::finished,&eventLoop,&QEventLoop::quit);

    thread->start();

    eventLoop.exec();

    if(thread->getIsWaitTimeOut())

    {

        ba = reply->readAll();

    }

    else

    {

        m_errCode=QNetworkReply::TimeoutError;

    }

    thread->deleteLater();

    delete reply;

    delete thread;

    thread = NULL;

    retError = m_errCode;

    m_errCode= QNetworkReply::NoError;

    return retError;

}

QNetworkReply::NetworkError WebServiceHelp:: sendPostRequest(QString website, const QByteArray &postBa, QByteArray &retBa, int timeOutms)

{

    QString urlStr =website;

    QNetworkReply::NetworkError retError = QNetworkReply::NoError;

    m_errCode= QNetworkReply::NoError;

    QNetworkRequest request;

    QSslConfiguration config;

    config.setPeerVerifyMode(QSslSocket::VerifyNone);

    config.setProtocol(QSsl::TlsV1SslV3);

    request.setSslConfiguration(config);

    QUrl url(urlStr);

    request.setUrl(url);

    request.setHeader(QNetworkRequest::ContentTypeHeader,"application/json");

    request.setHeader(QNetworkRequest::ContentLengthHeader,postBa.length());

    QNetworkReply *reply = manager->post(request,postBa);

    connect(reply,static_cast<void (QNetworkReply::*)(QNetworkReply::NetworkError)>(&QNetworkReply::error),this,&WebServiceHelp::slot_error);

    QEventLoop eventLoop;

    NetDataListenerThread * thread = new NetDataListenerThread(manager,reply,timeOutms);

    connect(thread, &NetDataListenerThread::finished,&eventLoop,&QEventLoop::quit);

    thread->start();

    eventLoop.exec();

    if(thread->getIsWaitTimeOut())

    {

        retBa = reply->readAll();

    }

    else

    {

        m_errCode=QNetworkReply::TimeoutError;

    }

    thread->deleteLater();

    delete reply;

    delete thread;

    thread = NULL;

    retError = m_errCode;

    m_errCode= QNetworkReply::NoError;

    return retError;

}

void WebServiceHelp::slot_error(QNetworkReply::NetworkError code)

{

    m_errCode = code;

}

WebServiceHelp::Dispose::~Dispose()

{

    if(WebServiceHelp::serverHelp!=NULL)

    {

        delete WebServiceHelp::serverHelp;

        WebServiceHelp::serverHelp=NULL;

    }

}

三，调用 

（1），get请求

QNetworkReply::NetworkError ret=WebServiceHelp::getInstance()->sendGetRequest(url,ba);

    if(ret==QNetworkReply::NoError)

    {

        return QString(ba);

    }

    else

    {

        return "NetworkError";

    }

(2) post请求

QByteArray retBa;
    QNetworkReply::NetworkError ret=WebServiceHelp::getInstance()->sendPostRequest(webSite,postBa,retBa);
    qDebug()<<"ret.errorString();"<<ret;
    if(ret==QNetworkReply::NoError)
    {
        return QString(retBa);
    }
    else
    {
        return "NetworkError";
    }