#include
#include
#include
#include
#include "tinyxml.h"
#pragma comment(lib, "tinyxml.lib")
#pragma comment(lib, "tinyxmlSTL.lib")
using namespace std;

void ConvertUTF8ToANSI(CString strUTF8,CString &strANSI) //
{
int nLen = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, (LPCTSTR)strUTF8, -1, NULL, 0);
//返回需要的unicode长度
WCHAR *wszANSI = new WCHAR[nLen+1];
memset(wszANSI, 0, nLen * 2 + 2);
nLen = MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strUTF8, -1, wszANSI, nLen); //把utf8转成unicode
nLen = WideCharToMultiByte(CP_ACP, 0, wszANSI, -1, NULL, 0, NULL, NULL); //得到要的ansi长度
char *szANSI=new char[nLen + 1];
memset(szANSI, 0, nLen + 1);
WideCharToMultiByte (CP_ACP, 0, wszANSI, -1, szANSI, nLen, NULL,NULL); //把unicode转成ansi
strANSI = szANSI;
delete wszANSI;
delete szANSI;
}

void getXml(LPCTSTR url)
{
CFile file((TEXT("temp.xml")), CFile::modeCreate|CFile::modeWrite);
CString content;
CString data, temp;
DWORD dwStatusCode;
CInternetSession session(TEXT("HttpClient"));

CHttpFile\* pfile = (CHttpFile \*)session.OpenURL(url);  
pfile -> QueryInfoStatusCode(dwStatusCode);  
if(dwStatusCode == HTTP\_STATUS\_OK)  
{  
    while (pfile -> ReadString(data))  
    {  
        temp  += data;  
    }  
}  
pfile -> Close();  
delete pfile;  
session.Close();  
ConvertUTF8ToANSI(temp, content);  
file.Write(content, content.GetLength());  
file.Close();  

}

void readXml()
{
TiXmlDocument doc("temp.xml");
doc.LoadFile();
//doc.Print();
TiXmlElement* rootElement = doc.RootElement(); //xml

TiXmlElement\* dataElement = rootElement->FirstChildElement();  //data  
for (; dataElement != NULL; dataElement = dataElement->NextSiblingElement())  
{  
    TiXmlElement\* Element = dataElement->FirstChildElement();  
    for (; Element != NULL; Element = Element->NextSiblingElement())  
    {  
        string Type = Element->Value();  
        string Value = Element->GetText();  
        cout << Type  << " : " << Value << endl;  
    }  
}  

}

int main()
{
LPCTSTR str = TEXT("http://api.kuaidi100.com/api?id=a78e61062aabe452&com=yuantong&nu=9100493541&show=1");
getXml(str);
readXml();
//system("del temp.xml");
//system("pause");
return 0;
}

需要将返回的UTF-8数据转换为string，char等都支持的ansi

void ConvertUTF8ToANSI(CString strUTF8,CString &strANSI) //
{
int nLen = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, (LPCTSTR)strUTF8, -1, NULL, 0);
//返回需要的unicode长度
WCHAR *wszANSI = new WCHAR[nLen+1];
memset(wszANSI, 0, nLen * 2 + 2);
nLen = MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strUTF8, -1, wszANSI, nLen); //把utf8转成unicode
nLen = WideCharToMultiByte(CP_ACP, 0, wszANSI, -1, NULL, 0, NULL, NULL); //得到要的ansi长度
char *szANSI=new char[nLen + 1];
memset(szANSI, 0, nLen + 1);
WideCharToMultiByte (CP_ACP, 0, wszANSI, -1, szANSI, nLen, NULL,NULL); //把unicode转成ansi
strANSI = szANSI;
delete wszANSI;
delete szANSI;
}

或者利用C++11

void ConvertUTF8ToANSI()
{
auto LocUtf8 = std::locale(std::locale(""), new std::codecvt_utf8);
std::wifstream wfin("temp1.xml");
std::wstring wstr, content;
wfin.imbue(LocUtf8);
while(getline(wfin, wstr))
{
content += wstr;
}
wfin.close();
system("del temp1.xml");
//std::wcout.imbue(std::locale(""));
//std::wcout << content << std::endl;

std::locale::global(std::locale("Chinese-simplified"));  
std::wofstream wfout("temp.xml");  
wfout << content;  
wfout.close();  

}

寻得一个不用解码的API

http://api.ickd.cn/?id=102530&secret=dff7b12be1ae97433b2b57c74633a98d&com=shentong&nu=668456861017&type=xml

支持的常用的快递公司更多，果断换了。

#include
#include
#include
#include
#include
#include

void getXml(LPCTSTR url)
{
CFile file((TEXT("temp.xml")), CFile::modeCreate|CFile::modeWrite);
CString content;
CString data;
DWORD dwStatusCode;
CInternetSession session(TEXT("HttpClient"));

CHttpFile\* pfile = (CHttpFile \*)session.OpenURL(url);  
pfile -> QueryInfoStatusCode(dwStatusCode);  
if(dwStatusCode == HTTP\_STATUS\_OK)  
{  
    while (pfile -> ReadString(data))  
    {  
        content  += data;  
    }  
}  
pfile -> Close();  
delete pfile;  
session.Close();  
file.Write(content, content.GetLength());  
file.Close();  

}

void readXml(void)
{
TiXmlDocument doc("temp.xml");
doc.LoadFile();
//doc.Print();
TiXmlElement* rootElement = doc.RootElement(); //response
TiXmlElement* dataElement = rootElement->FirstChildElement("data"); //item
TiXmlElement* itemElement = dataElement->FirstChildElement();

for (; itemElement != NULL; itemElement = itemElement->NextSiblingElement())  
{  
    TiXmlElement\* Element = itemElement->FirstChildElement();  
    for (; Element != NULL; Element = Element->NextSiblingElement())  
    {  
        string Type = Element->Value();  
        string Value = Element->GetText();  
        cout << Type  << " : " << Value << endl;  
    }  
}  

}

int scan(void)
{
int n;
cout << "--------+++++++++++++++++++---------" << endl; cout << " 请选择快递公司 " << endl; cout << " 1.申通快递 2.圆通快递 " << endl; cout << " 3.天天快递 4.顺丰快递 " << endl; cout << " 5.韵达快递 6.中通快递 " << endl; cout << " 7.EMS快递 8.宅急送 " << endl; cout << "--------+++++++++++++++++++---------" << endl; cin >> n;
return n;
}

int main(void)
{
string nu;
string url;
int flag;
bool quit = false;
const string key("http://api.ickd.cn/?id=102530&secret=dff7b12be1ae97433b2b57c74633a98d");
mapMap;
Map[1] = "&com=shentong";
Map[2] = "&com=yuantong";
Map[3] = "&com=tiantian";
Map[4] = "&com=shunfeng";
Map[5] = "&com=yunda";
Map[6] = "&com=zhongtong";
Map[7] = "&com=ems";
Map[8] = "&com=zhaijisong";

while (!quit)  
{  
    flag = scan();  
    if(flag >= 1 && flag <= 8)  
    {  
        cout << "请输入运单号：" << endl;  
        cin >> nu;  
        url = key + Map\[flag\] + "&nu=" + nu + "&type=xml";  
        //cout << url << endl;  
        getXml(url.c\_str());  
        readXml();  
        system("del temp.xml");  
    }  
    else  
    {  
        quit = true;  
    }  
}  
return 0;  

}