VC获取网页源码的三种方式

来源：互联网发布：如何登录淘宝子账号编辑：程序博客网时间：2024/05/22 14:19
//有三种方法'方法一(只适用于MFC工程)：//参数URL：网页地址//返回CString就是网页源码//返回的网页源码是UTF8格式,要转成ANSI等编码才能正常显示#include <afxinet.h>CString GetWebSource(CString URL){    CInternetSession Session(NULL,0);    CString PageData;    CString TempData;    CHttpFile*HttpFile=(CHttpFile*)Session.OpenURL(URL);    while(HttpFile->ReadString(TempData))    {        PageData+=TempData;    }    HttpFile->Close();    delete HttpFile;    Session.Close();    //这里返回的网页源码是UTF8格式,要转成ANSI等编码才能正常显示    return PageData;}'方法二：首先引用:#import <msxml4.dll> named_guidsusing namespace MSXML2;CString resaa;IXMLHTTPRequestPtr httpRes;HRESULT hr=httpRes.CreateInstance("MSXML2.XMLHTTP");if(!SUCCEEDED(hr)){  AfxMessageBox("无法创建XMLHTTP对象，请检查是否安装了MS XML运行库!");}LPCTSTR url="http://localhost/changjun/asxml.asp";httpRes->open("Get",url,false,"","");httpRes->send();if((httpRes->readyState)==4) //4时表示数据已加载完{  resaa=httpRes->responseText.copy();}httpRes.Release();//到这里,再把UTF8转成char就可以正常显示网页源码了'方法三：#include <wininet.h>#pragma comment(lib, "wininet.lib")char* GetWebPage(char*URL){    HINTERNET Session = InternetOpen(NULL,INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,NULL);    if (NULL == Session)    {        InternetCloseHandle(Session);        return FALSE;    }    HINTERNET hHttpFile =InternetOpenUrl(Session,URL,NULL,NULL,INTERNET_FLAG_NO_CACHE_WRITE,NULL);    if (NULL == hHttpFile)     {        InternetCloseHandle(hHttpFile);        InternetCloseHandle(Session);        return FALSE;     }char szSizeBuffer[32];DWORD dwLengthSizeBuffer = sizeof(szSizeBuffer);DWORD dwFileSize=10*1024;if(::HttpQueryInfo(hHttpFile,5, szSizeBuffer,&dwLengthSizeBuffer,NULL)==TRUE){// allocating the memory space for http file contentsdwFileSize=atol(szSizeBuffer);}    PBYTE pBuf = new BYTE[dwFileSize*sizeof(TCHAR)];    if (NULL == pBuf)     {        InternetCloseHandle(hHttpFile);        InternetCloseHandle(Session);        return FALSE;     }    DWORD dwReadDataLength = NULL;    BOOL bRet = TRUE;    do     {        //ZeroMemory(pBuf,dwMaxDataLength*sizeof(TCHAR));        bRet = InternetReadFile(hHttpFile,pBuf,dwFileSize,&dwReadDataLength);     } while (NULL != dwReadDataLength);    return (char*)pBuf;}
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