使用wininet下载一个网页

WinInet基础知识 | Microsoft Learn

//this code excerpt also demonstrates try/catch exception handling

#include <afxinet.h>

void DisplayHttpPage(LPCTSTR pszServerName, LPCTSTR pszFileName)

{

CInternetSession session(_T("My Session")); //用于建立一个网络连接

CHttpConnection* pServer = NULL; //用于管理上面建立的网络连接

CHttpFile* pFile = NULL; //用于读取或者储存文件包括本地

try

{

CString strServerName;

INTERNET_PORT nPort = 80;

DWORD dwRet = 0;

pServer = session.GetHttpConnection(pszServerName, nPort); //这个就是常规用法即：

//CHttpConnectionObj=session.GetHttpConnection();

//后面这2个函数一起作用用于打开服务器上面的文件或者本地的文件

pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET, pszFileName);

pFile->SendRequest();

pFile->QueryInfoStatusCode(dwRet);

if (dwRet == HTTP_STATUS_OK)

{

CHAR szBuff1024;

while (pFile->Read(szBuff, 1024) > 0)

{

printf_s("%1023s", szBuff);

}

}

delete pFile;

delete pServer;

}

catch (CInternetException* pEx)

{

//catch errors from WinInet

TCHAR pszError64;

pEx->GetErrorMessage(pszError, 64);

_tprintf_s(_T("%63s"), pszError);

}

session.Close();

}