MFC--显示HTTP获取到XML的列表信息
声明：本文是我项目过程中的一个小小的Demo，里面涉及到的知识是使用HTTP获取XML数据，然后使用tinyxml库解析获取到的XML数据。使用STL的Vector保存列表信息。最后使用List Control显示列表信息。
效果图：
1.构造保存列表信息的类（结构体也可以）BuildingInfo
#pragma once
class BuildingInfo
{
public:
BuildingInfo(void);
~BuildingInfo(void);
inline CString getBuildingId()
{
return m_buildingid;
}
inline CString getBuildingName()
{
return m_buildingname;
}
inline CString getFloorCount()
{
return m_floorcount;
}
inline void setBuildingId(CString &buildingid)
{
m_buildingid = buildingid;
}
inline void setBuildingName(CString &buildingname)
{
m_buildingname = buildingname;
}
inline void setFloorCount(CString &floorcount)
{
m_floorcount = floorcount;
}
private:
CString m_buildingid; // 楼栋Id
CString m_buildingname; // 楼栋名称
CString m_floorcount; // 楼栋楼层数
};
对应的CPP文件
#include "StdAfx.h"
#include "BuildingInfo.h"
BuildingInfo::BuildingInfo(void)
{
}
BuildingInfo::~BuildingInfo(void)
{
}
2.HTTP获取XML数据（不一定就是xml）CHttpClient
#include "StdAfx.h"
#include "HttpClient.h"
//#include "emailsenderv2.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
CHttpClient::CHttpClient()
{
}
CHttpClient::~CHttpClient()
{
}
CString CHttpClient::doGet(CString href)
{
CString httpsource =_T("");
CInternetSession session1(NULL,0);
CHttpFile* pHTTPFile=NULL;
try{
pHTTPFile=(CHttpFile*)session1.OpenURL(href);
//session1.
}catch(CInternetException){
pHTTPFile=NULL;
}
if(pHTTPFile)
{
CString text;
for(int i=0;pHTTPFile->ReadString(text);i++)
{
//afxDump << "text:"<<text.GetBuffer()<<"\r\n";
httpsource += text;// + _T("rn");
}
pHTTPFile->Close();
delete pHTTPFile;
}else{
}
return httpsource;
}
CString CHttpClient::doPost(CString href)
{
CString httpsource = _T("");
CInternetSession session1;
CHttpConnection* conn1=NULL;
CHttpFile* pFile = NULL;
CString strServerName;
CString strObject;
INTERNET_PORT nPort;
DWORD dwServiceType;
AfxParseURL((LPCTSTR)href,dwServiceType, strServerName, strObject, nPort);
DWORD retcode;
char* outBuff = (char*)CONTENT.GetBuffer(1000);
try
{
conn1 = session1.GetHttpConnection(strServerName,nPort);
pFile = conn1->OpenRequest(0,strObject.GetBuffer(),NULL,1,NULL, _T("HTTP/1.1"),
INTERNET_FLAG_EXISTING_CONNECT|INTERNET_FLAG_NO_AUTO_REDIRECT);
pFile->AddRequestHeaders(_T("Content-Type: application/x-www-form-urlencoded"));
pFile -> AddRequestHeaders(_T("Accept: */*"));
pFile -> SendRequest(NULL,0,outBuff,strlen(outBuff)+1);
pFile -> QueryInfoStatusCode(retcode);
}
catch (CInternetException * e){};
if(pFile)
{
CString text;
for(int i=0;pFile->ReadString(text);i++)
{
httpsource += text;
}
pFile->Close();
}else
{
}
return httpsource;
delete pFile;
delete conn1;
session1.Close();
}
void CHttpClient::addParam(CString name, CString value)
{
names.AddTail((LPCTSTR)name);
values.AddTail((LPCTSTR)value);
CString eq=_T("=");
CString an=_T("&");
CONTENT=CONTENT+name+eq+value+an;
CL=CONTENT.GetLength();
}
bool CHttpClient::download(const CString &strFileURLInServer, const CString &strFileLocalFullPath, HWND hWnd)
{
ASSERT(strFileURLInServer != "");
ASSERT(strFileLocalFullPath != "");
CInternetSession session;
CHttpConnection* pHttpConnection = NULL;
CHttpFile* pHttpFile = NULL;
CString strServer, strObject;
INTERNET_PORT wPort;
DWORD dwType;
const int nTimeOut = 2000;
session.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, nTimeOut); //重试之间的等待延时
session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); //重试次数
char* pszBuffer = NULL;
try
{
AfxParseURL(strFileURLInServer, dwType, strServer, strObject, wPort);
pHttpConnection = session.GetHttpConnection(strServer, wPort);
pHttpFile = pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET, strObject);
if(pHttpFile->SendRequest() == FALSE)
return false;
DWORD dwStateCode;
pHttpFile->QueryInfoStatusCode(dwStateCode);
if(dwStateCode == HTTP_STATUS_OK)
{
HANDLE hFile = CreateFile(strFileLocalFullPath, GENERIC_WRITE,
FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
NULL); //创建本地文件
if(hFile == INVALID_HANDLE_VALUE)
{
int error = GetLastError(); // 错误码 5 拒绝访问，没有访问目录的权限
pHttpFile->Close();
pHttpConnection->Close();
session.Close();
return false;
}
char szInfoBuffer[1000]; //返回消息
DWORD dwFileSize = 0; //文件长度
DWORD dwInfoBufferSize = sizeof(szInfoBuffer);
BOOL bResult = FALSE;
CString str;
int pos;
//bResult = pHttpFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH,
// (void*)&szInfoBuffer, &dwInfoBufferSize,NULL);
bResult = pHttpFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH, str);
WideCharToMultiByte(0,0,str,-1,szInfoBuffer,64,0,0); // 宽字节转多字节
//dwFileSize = atoi(str.GetString());
dwFileSize = atoi(szInfoBuffer);
const int BUFFER_LENGTH = 1024 * 10;
pszBuffer = new char[BUFFER_LENGTH]; //读取文件的缓冲
DWORD dwWrite, dwTotalWrite;
dwWrite = dwTotalWrite = 0;
UINT nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH); //读取服务器上数据
while(nRead > 0)
{
WriteFile(hFile, pszBuffer, nRead, &dwWrite, NULL); //写到本地文件
dwTotalWrite += dwWrite;
nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH);
pos = 100 * dwTotalWrite / dwFileSize;
bResult = PostMessage(hWnd, WM_VERSION_UPDATE, (WPARAM)TRUE, (LPARAM)&pos);
}
delete[]pszBuffer;
pszBuffer = NULL;
CloseHandle(hFile);
}
else
{
delete[]pszBuffer;
pszBuffer = NULL;
if(pHttpFile != NULL)
{
pHttpFile->Close();
delete pHttpFile;
pHttpFile = NULL;
}
if(pHttpConnection != NULL)
{
pHttpConnection->Close();
delete pHttpConnection;
pHttpConnection = NULL;
}
session.Close();
return false;
}
}
catch(...)
{
delete[]pszBuffer;
pszBuffer = NULL;
if(pHttpFile != NULL)
{
pHttpFile->Close();
delete pHttpFile;
pHttpFile = NULL;
}
if(pHttpConnection != NULL)
{
pHttpConnection->Close();
delete pHttpConnection;
pHttpConnection = NULL;
}
session.Close();
return false;
}
if(pHttpFile != NULL)
pHttpFile->Close();
if(pHttpConnection != NULL)
pHttpConnection->Close();
session.Close();
return true;
}
3.使用tinyxml解析数据并显示
void CDemoHttpMFCDlg::OnBnClickedOk()
{
// TODO: 在此添加控件通知处理程序代码
UpdateData(TRUE); // 从界面获取数据 m_url
//OutputDebugString(m_url);
//HttpTranslate(CHttpConnection::HTTP_VERB_GET, m_url, NULL, m_result); // 获取的数据中文乱码
CHttpClient httpClient;
m_result = httpClient.doGet(m_url); // 获取数据乱码
try
{
//LPCTSTR szFileName = _T("E:\\temp\\t.html");
//CFile file(szFileName, CFile::modeCreate|CFile::modeWrite);
//file.Write((LPCTSTR)m_result, m_result.GetLength() * sizeof(TCHAR));
//file.Close();
//ShellExecute(NULL, _T("open"), szFileName, NULL, NULL, SW_SHOWNORMAL);
}
catch (CFileException* e)
{
e->ReportError();
e->Delete();
}
wchar_t *w_result = NULL;
w_result = toUTF8(m_result); // Unicode 转 UTF-8 解决乱码
//char *c_result = NULL;
//c_result = UnicodeToUtf8(m_result);
// 解析获取到的xml数据
TiXmlDocument *pDoc = new TiXmlDocument();
CStringA szMsg;
szMsg = w_result;
pDoc->Parse(szMsg);
if (pDoc->Error())
{
CStringA errorInfo = pDoc->ErrorDesc();
AfxMessageBox((CString)errorInfo);
//return NULL;
}
const TiXmlElement *root = pDoc->RootElement();
for (const TiXmlNode *child = root->FirstChild(); child; child = child->NextSibling()) { // 获取节点信息
const TiXmlElement *element = (const TiXmlElement *)child;
CStringA value = element->Value();
CStringA text = element->GetText();
OutputDebugString(_T("value = ") + (CString)value + _T("\n"));
OutputDebugString(_T("text = ") + (CString)text + _T("\n"));
if (!strcmp(element->Value(), "userid"))
{
}
if (!strcmp(element->Value(), "errorCode"))
{
}
if (!strcmp(element->Value(), "errorDetail"))
{
}
if (!strcmp(element->Value(), "result"))
{
}
if (!strcmp(element->Value(), "name"))
{
}
if (!strcmp(element->Value(), "usertype"))
{
}
if (!strcmp(element->Value(), "orgcode"))
{
}
// 获取元素信息
if (!strcmp(element->Value(), "buidingList") && (child->Type() == TiXmlNode::TINYXML_ELEMENT))
{
CStringA buildingid = element->Attribute("buildingid");
CStringA buildingname = element->Attribute("buildingname");
CStringA floorcount = element->Attribute("floorcount");
OutputDebugString(_T("buildingid = ") + (CString)buildingid + _T("\n"));
OutputDebugString(_T("buildingname = ") + (CString)buildingname + _T("\n"));
OutputDebugString(_T("floorcount = ") + (CString)floorcount + _T("\n"));
BuildingInfo buildingInfo;
buildingInfo.setBuildingId((CString)buildingid);
buildingInfo.setBuildingName((CString)buildingname);
buildingInfo.setFloorCount((CString)floorcount);
m_buildingInfoList.push_back(buildingInfo); // 存储元素列表信息
}
}
// list显示
CRect rect;
m_list.GetClientRect(rect);
m_list.SetExtendedStyle(m_list.GetExtendedStyle() | LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT);
m_list.InsertColumn(0, _T("Id"), LVCFMT_CENTER, rect.Width() / 3, 0);
m_list.InsertColumn(1, _T("Name"), LVCFMT_CENTER, rect.Width() / 3, 1);
m_list.InsertColumn(2, _T("Floor"), LVCFMT_CENTER, rect.Width() / 3, 2);
for (int i = 0; i < m_buildingInfoList.size(); i++)
{
m_list.InsertItem(i, m_buildingInfoList[i].getBuildingId());
m_list.SetItemText(i, 1, m_buildingInfoList[i].getBuildingName());
m_list.SetItemText(i, 2, m_buildingInfoList[i].getFloorCount());
}
//m_result = CString(w_result);
//UpdateData(FALSE); // 向界面传递参数
//CDialogEx::OnOK();
}
备注：unicode 转 utf8
char* UnicodeToUtf8(CString unicode)
{
int len;
len = WideCharToMultiByte(CP_UTF8, 0, (LPCWSTR)unicode, -1, NULL, 0, NULL, NULL);
char *szUtf8=new char[len + 1];
memset(szUtf8, 0, len * 2 + 2);
WideCharToMultiByte (CP_UTF8, 0, (LPCWSTR)unicode, -1, szUtf8, len, NULL,NULL);
return szUtf8;
}
wchar_t* toUTF8(CString& str){
//char * pStr = (LPCSTR)(str.GetBuffer(str.GetLength()));; //取得str对象的原始字符串
int nBufferSize = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)(str.GetBuffer(str.GetLength())), -1, NULL, 0); //取得所需缓存的多少
wchar_t *pBuffer = (wchar_t*)malloc(nBufferSize * sizeof(wchar_t));//申请缓存空间
MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)(str.GetBuffer(str.GetLength())), -1 , pBuffer, nBufferSize*sizeof(wchar_t));//转码
//MessageBoxW(NULL, pBuffer, L"Text", MB_OK); //显示
//free(pBuffer); //释放缓存
return pBuffer;
}
源码：http://download.csdn.net/detail/u012377333/9548115