QtSoap开发web services客户端程序

    首先需要下载QtSoap开源包,下载地址为:
http://www.filestube.com/q/qtsoap+download,
我使用的是:qtsoap-2.6-opensource(不需要安装,直接解压到某个目录即可)。
   如果你从未使用过QtSoap,那么先学习其中的Demo,在目录"examples"中,有easter,google和population 三个例子。
 
Note to Qt Visual Studio Integration users: In the instructions below, instead of building from command line with nmake, you can use the menu command 'Qt->Open Solution from .pro file' on the .pro files in the example and plugin directories, and then build from within Visual Studio.
如果是使用的的是VS+Qt开发方式,在使用菜单中的"Qt→Open Qt Project File (.pro)... 来打开以上工程文件。
 
    本人使用的是VS2010,在采用以上方法时,仍然无法正常载入,于是我先用VS2005打开,在VS2005里对以上项目进行保存,再在VS2010里重新打开,当然在VS2010里重新打开时会提示需要进行格式转换,成功后你就可以编译运行Demo了。
 
本人先重写了:population,主要是为了熟悉下QtSoap以及开发配置。
 
1 在头文件(xxx.h)定义变量(XXX为类名,请您重新定义)。
 
#include  <qtsoap.h>
class QTextEdit;
 
private slots:
    void
  getResponse();
private:
     QTextEdit    *m_pWeatherEdt;
private:
    QtSoapHttpTransport http;
 
2 在类的构造函数中:
     m_pWeatherEdt =  new QTextEdit( this);
    connect(&httpSIGNAL(responseReady()), SLOT(getResponse()));
 
3 请求发送:
void XXX:: submitRequest()
{
    http. setHost(" www.abundanttech.com");
     QtSoapMessage  request;
     http. setAction  (" http://www.abundanttech.com/WebServices/Population/getPopulation");
     request. setMethod("getPopulation", " http://www.abundanttech.com/WebServices/Population");
     request. addMethodArgument ("strCountry""""china");
     http. submitRequest(request,  "/WebServices/Population/population.asmx");
 }
 
以上参数请查看: http://www.abundanttech.com/WebServices/Population/population.asmx

如下:

SOAP

The following is a sample SOAP request and response. The placeholders shown need to be replaced with actual values.

POST /WebServices/Population/population.asmx HTTP/1.1
Host: www.abundanttech.com
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://www.abundanttech.com/WebServices/Population/getPopulation"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <getPopulation xmlns="http://www.abundanttech.com/WebServices/Population">
      <strCountry>string</strCountry>
    </getPopulation>
  </soap:Body>
</soap:Envelope>
当然,你也可以使用“中国气象局”的web services来做测试示例
void XXX::submitRequest()
{
    http.setHost("www.ayandy.com");
    QtSoapMessage request;
    http.setAction("http://tempuri.org/getSupportProvince ");
    request.setMethod("getSupportProvince", "http://tempuri.org/
");
    http.submitRequest(request, "/Service.asmx");
 }
以上参数请查看: http://www.ayandy.com/Service.asmx如下:

SOAP 1.1

以下是 SOAP 1.2 请求和响应示例。所显示的占位符需替换为实际值。

POST /Service.asmx HTTP/1.1
Host: www.ayandy.com
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://tempuri.org/getSupportProvince"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <getSupportProvince xmlns="http://tempuri.org/" />
  </soap:Body>
</soap:Envelope>
 
4 回复解析:
void XXX::getResponse()
{
     // Get a reference to the response message.
    const QtSoapMessage &message = http.getResponse();
    // Check if the response is a SOAP Fault message
    if (message.isFault()) 
    {
        m_pWeatherEdt->append(message.faultString().value().toString().toLatin1().constData());
    }
    else 
    {
        // Get the return value, and print the result.
        const QtSoapType &response = message.returnValue();
        m_pWeatherEdt->append(response["Country"].value().toString().toLatin1().constData());
        m_pWeatherEdt->append(response["Pop"].value().toString().toLatin1().constData());
        m_pWeatherEdt->append(response["Date"].value().toString().toLatin1().constData());

    }
}

以上方法只能解析固定类型的消息,下面介绍一种通用方法:

void XXX::getResponse()
{
    // Get a reference to the response message.
    const QtSoapMessage &message = http.getResponse();
    // Check if the response is a SOAP Fault message
    if (message.isFault()) 
    {
        m_pWeatherEdt->append(message.faultString().value().toString().toLatin1().constData());
    }
    else 
    {
        const QtSoapType &root = message.returnValue();
        QtSoapStruct myStruct((QtSoapStruct&)root);
        //将返回的结构体转换成 QtSoapStruct
        for (int i = 0; i < myStruct.count(); i++)
        {
            m_pWeatherEdt->append(myStruct[i].typeName() + " : " + myStruct[i].toString());
        }
   
    }
}

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