imgconfirmcode.cpp

vc++编写的图片验证系统 vc++编写的图片验证系统

// IMGCONFIRMCODE.CPP - Implementation file for your Internet Server
//    ImgConfirmCode Extension

#include "stdafx.h"
#include "ImgConfirmCode.h"
#include "dibapi.h"
///////////////////////////////////////////////////////////////////////
// The one and only CWinApp object
// NOTE: You may remove this object if you alter your project to no
// longer use MFC in a DLL.

CWinApp theApp;

///////////////////////////////////////////////////////////////////////
// command-parsing map

BEGIN_PARSE_MAP(CImgConfirmCodeExtension, CHttpServer)
	// TODO: insert your ON_PARSE_COMMAND() and 
	// ON_PARSE_COMMAND_PARAMS() here to hook up your commands.
	// For example:

	ON_PARSE_COMMAND(GetImage, CImgConfirmCodeExtension, ITS_PSTR)
	ON_PARSE_COMMAND_PARAMS("Image")

	ON_PARSE_COMMAND(Default, CImgConfirmCodeExtension, ITS_EMPTY)
	DEFAULT_PARSE_COMMAND(Default, CImgConfirmCodeExtension)
END_PARSE_MAP(CImgConfirmCodeExtension)


///////////////////////////////////////////////////////////////////////
// The one and only CImgConfirmCodeExtension object

CImgConfirmCodeExtension theExtension;


///////////////////////////////////////////////////////////////////////
// CImgConfirmCodeExtension implementation

CImgConfirmCodeExtension::CImgConfirmCodeExtension()
{
}

CImgConfirmCodeExtension::~CImgConfirmCodeExtension()
{
}

BOOL CImgConfirmCodeExtension::GetExtensionVersion(HSE_VERSION_INFO* pVer)
{
	// Call default implementation for initialization
	CHttpServer::GetExtensionVersion(pVer);

	// Load description string
	TCHAR sz[HSE_MAX_EXT_DLL_NAME_LEN+1];
	ISAPIVERIFY(::LoadString(AfxGetResourceHandle(),
			IDS_SERVER, sz, HSE_MAX_EXT_DLL_NAME_LEN));
	_tcscpy(pVer->lpszExtensionDesc, sz);
	return TRUE;
}

BOOL CImgConfirmCodeExtension::TerminateExtension(DWORD dwFlags)
{
	// extension is being terminated
	//TODO: Clean up any per-instance resources
	return TRUE;
}

///////////////////////////////////////////////////////////////////////
// CImgConfirmCodeExtension command handlers

void CImgConfirmCodeExtension::Default(CHttpServerContext* pCtxt)
{
	StartContent(pCtxt);
	WriteTitle(pCtxt);

	*pCtxt << _T("图片验证码 ISAPI,VC实例编程\r\n");


	EndContent(pCtxt);
}

// Do not edit the following lines, which are needed by ClassWizard.
#if 0
BEGIN_MESSAGE_MAP(CImgConfirmCodeExtension, CHttpServer)
	//{{AFX_MSG_MAP(CImgConfirmCodeExtension)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
#endif	// 0



///////////////////////////////////////////////////////////////////////
// If your extension will not use MFC, you'll need this code to make
// sure the extension objects can find the resource handle for the
// module.  If you convert your extension to not be dependent on MFC,
// remove the comments arounn the following AfxGetResourceHandle()
// and DllMain() functions, as well as the g_hInstance global.

/****

static HINSTANCE g_hInstance;

HINSTANCE AFXISAPI AfxGetResourceHandle()
{
	return g_hInstance;
}

BOOL WINAPI DllMain(HINSTANCE hInst, ULONG ulReason,
					LPVOID lpReserved)
{
	if (ulReason == DLL_PROCESS_ATTACH)
	{
		g_hInstance = hInst;
	}

	return TRUE;
}

****/

void CImgConfirmCodeExtension::GetImage(CHttpServerContext *pCtxt, LPCSTR sImage)
{
   	//字节数组,保存图片数据
	CByteArray caImage;
    //图片信息字符串,为一串数字,2位以上
    CString cImage(sImage);
  	HDIB  m_hDIB;  
	//根据cImage中包含的数字生成图片
	//cImage中包含2位以上(包括2位)数字

   int num1=atoi(cImage.Mid(0,1));
   int num2=atoi(cImage.Mid(1,1)); 
   //合并图片
	::MergeDIB(num1,num2,&m_hDIB);
	for(int i=2;i<cImage.GetLength();i++){
		//合并图片
	  ::MergeDIB(m_hDIB,atoi(cImage.Mid(i,1)),&m_hDIB);
	}
	//转换为字节数组准备输出 
	HDIB2ByteArray(m_hDIB,&caImage);
	*pCtxt << caImage;
}