C++ 调用webservice接口取天气预报信息

#include "stdafx.h"
#include
#include
#include "tchar.h"

//需要安装 msxml.msi,把 msxml5.dll拷贝到本VS项目目录下，这样编译后的程序不依赖绝对路径，
//当然发布时也要把动态库和程序放在同一个目录下
#import "msxml5.dll"   

//需要安装 SoapToolkit30.EXE，把 mssoap30.dll 拷贝到本VS项目目录下，这样编译后的程序不依赖绝对路径，
//当然发布时也要把动态库和程序放在同一个目录下
//编译后 msxml5.dll,mssoap30.dll需要拷贝到可执行程序所在的目录，程序运行时需要查找动态库
#import "mssoap30.dll" \
    exclude("IStream", "IErrorInfo", "ISequentialStream", "_LARGE_INTEGER", \
    "_ULARGE_INTEGER", "tagSTATSTG", "_FILETIME")
using namespace MSXML2;
using namespace MSSOAPLib30;

void query(char *EndPointURL/*,char *NameSpace,char *method,int argv_len,char* argv[],char* argn[]*/)
{
    ISoapSerializerPtr Serializer;
    ISoapReaderPtr Reader;
    ISoapConnectorPtr Connector;

    //创建DOMDocument对象     
    MSXML2::IXMLDOMDocumentPtr   pDoc;      
    MSXML2::IXMLDOMElementPtr    xmlRoot;
    HRESULT   hr   =   pDoc.CreateInstance(__uuidof(MSXML2::DOMDocument30)); 

    if(!SUCCEEDED(hr))    
    {                                  
        puts("Create IXMLDOMDocument failed\n");
        return;
    }

    // Connect to the service
    Connector.CreateInstance(__uuidof(HttpConnector30));
    Connector->Property["EndPointURL"] = EndPointURL;//接口位置
    hr = Connector->Connect();//和服务器连接
    if ( hr != S_OK )
    {
        puts("connect webservice failed!\n");
        return;
    }

    // Begin message
    Connector->Property["SoapAction"] = _T("方法名
    Connector->BeginMessage();
    Serializer.CreateInstance(__uuidof(SoapSerializer30));
    // 将serializer连接到connector的输入字符串
    Serializer->Init(_variant_t((IUnknown*)Connector->InputStream));

    // 创建SOAP消息
    Serializer->StartEnvelope("Soap","","");   
    Serializer->StartBody("");  
    Serializer->StartElement("getWeatherbyCityName","");  //函数处理
    Serializer->StartElement("theCityName","","","Soap");
    Serializer->WriteString((_bstr_t)(LPCTSTR)_T("合肥"));          //参数处理      
    Serializer->EndElement();
    Serializer->EndElement();
    Serializer->EndBody();  
    Serializer->EndEnvelope();   //当天气预报的webservice服务繁忙时，可能会挂着这里好长时间。

    hr = Connector->EndMessage();
    if ( hr != S_OK )
    {
        puts("connect send failed!\n");
        return;
    }

    // 读取响应
    Reader.CreateInstance(__uuidof(SoapReader30));
    // 将reader联接到connector的输出字符串
    Reader->Load(_variant_t((IUnknown*)Connector->OutputStream), _T(""));

    pDoc->loadXML(Reader->GetRpcResult()->xml);

    //在终端里输出所有拿到的天气信息
    for(int i=0;ichildNodes->Getitem(0)->childNodes->Getlength();i++)
    {
        printf("%s\n",(char *)(pDoc->childNodes->Getitem(0)->childNodes->Getitem(i)->Gettext()));
       
    }
}

int _tmain(int argc, _TCHAR* argv[])
{
    CoInitialize(NULL);
    char *EndPointURL="地址，天气预报的webservice
    query(EndPointURL);     //执行接口调用
    CoUninitialize();
    getchar();
    return 0;

}