原先写过的代码，现在转移到自己博客上面以备参考。毕竟当初也是查了资料总结出来的方法。 先介绍字节字符集的实现。

CString CServerSession::httpGetRequest(CString url)
{
	CInternetSession m_InetSession;
	CString strHtml;
	try{
		CHttpFile* pFile =(CHttpFile*)m_InetSession.OpenURL(url);
		if (pFile!=NULL)
		{
			DWORD statusCode;  
			pFile->QueryInfoStatusCode(statusCode);  
			if (statusCode==HTTP_STATUS_OK)  
			{ 
				CString strLine;
				while (pFile->ReadString(strLine)>0)
					strHtml +=  strLine;
			}
		}
		m_InetSession.Close();
		pFile->Close();
		delete pFile;
	}
	catch (CInternetException* e){
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	catch (CMemoryException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	catch (CFileException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	catch (CException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	return strHtml;
}
CString CServerSession::httpPostRequest(CString requestData,CString pageUrl)
{
	CInternetSession m_InetSession;     //设置不缓冲
	CHttpConnection* pServer = NULL;
	CHttpFile* pFile = NULL;
	CString strHtml;
	//POST过去的数据requestData
	try{
		INTERNET_PORT nPort; //端口
		nPort=80;
		pServer = m_InetSession.GetHttpConnection("127.0.0.1", nPort);
		pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST,pageUrl);
		pFile->AddRequestHeaders("Content-Type: application/x-www-form-urlencoded");
		pFile->AddRequestHeaders("Accept: */*");
		pFile->SendRequestEx(requestData.GetLength());
		pFile->WriteString(requestData);
		pFile->EndRequest();
		DWORD dwRet;
		pFile->QueryInfoStatusCode(dwRet);
		if (dwRet == HTTP_STATUS_OK){
			CString strLine;
			while (pFile->ReadString(strLine)>0)
				strHtml +=  strLine;
		}
		m_InetSession.Close();
		pFile->Close();
		pServer->Close();
		delete pFile;
		delete pServer;
	}
	catch (CInternetException* e){
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	catch (CMemoryException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	catch (CFileException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	catch (CException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		AfxMessageBox(info);
	}
	return strHtml;
}

UNICODE工程的

CString CFDemoDlg::httpGetRequest(CString szUrl)
{
	CInternetSession m_InetSession;
	CString strHtml;
	try{
		CHttpFile* pFile =(CHttpFile*)m_InetSession.OpenURL(szUrl);
		if (pFile!=NULL)
		{
			DWORD statusCode;  
			pFile->QueryInfoStatusCode(statusCode);  
			if (statusCode==HTTP_STATUS_OK)  
			{ 
				TCHAR buf[1024]= {0};
				char tmp[2048] = {0};
				while(pFile->ReadString(buf, 1024)) 
				{
					for(int i=0, j=0; i<lstrlen(buf); i++, j+=2)
					{
						tmp[j] = LOBYTE(buf[i]);//取字的低字节
						tmp[j+1] = HIBYTE(buf[i]);//取字的高字节
					}
					CString ss(tmp);
					strHtml+=ss;
				}
			}
		}
		m_InetSession.Close();
		pFile->Close();
		if(pFile)delete pFile;
	}
	catch (CInternetException* e){
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		MessageBox(info);
	}
	catch (CException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		MessageBox(info);
	}
	return strHtml;
}

CString CFDemoDlg::httpPostRequest(CString szUrl,CString szPage, char* pWriteData)
{
	CInternetSession m_InetSession;     //设置不缓冲
	CHttpConnection* pServer = NULL;
	CHttpFile* pFile = NULL;
	CString strHtml;
	//POST过去的数据requestData
	try{
		INTERNET_PORT nPort; //端口
		nPort=3000;
		pServer = m_InetSession.GetHttpConnection(szUrl, nPort);
		pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST,szPage);
		pFile -> AddRequestHeaders(_T("Content-Type: application/x-www-form-urlencoded")); 
		pFile -> AddRequestHeaders(_T("Accept: */*"));
		pFile->SendRequest(NULL,NULL,pWriteData,(DWORD)strlen(pWriteData));
		DWORD dwRet;
		pFile->QueryInfoStatusCode(dwRet);
		if (dwRet == HTTP_STATUS_OK){
			TCHAR buf[1024]= {0};
			char tmp[2048] = {0};
			while(pFile->ReadString(buf, 1024)) 
			{
				for(int i=0, j=0; i<lstrlen(buf); i++, j+=2)
				{
					tmp[j] = LOBYTE(buf[i]);//取字的低字节
					tmp[j+1] = HIBYTE(buf[i]);//取字的高字节
				}
				DWORD dwUnicodeLen;        //转换后Unicode的长度
				//获得转换后的长度，并分配内存
				dwUnicodeLen = MultiByteToWideChar(CP_UTF8,0,tmp,-1,NULL,0);
				WCHAR* pWChar = new WCHAR[dwUnicodeLen];
				MultiByteToWideChar(CP_UTF8,0,tmp,-1,pWChar,dwUnicodeLen);
				strHtml += pWChar;
				//清除内存
				delete pWChar;
			}
		}
		m_InetSession.Close();
		if(pServer){pServer->Close();delete pServer;}
		if(pFile){pFile->Close();delete pFile;}
	}
	catch (CException* e)
	{
		TCHAR info[1024] = {0};
		e->GetErrorMessage(info,1024);
		MessageBox(info);
	}
	return strHtml;
}

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