分类：
2008-10-13 16:51:13
字数很少~能不能算文章~ ：P
vc写ISAPI不算复杂，因为有向导生成框架，不过估计现在ISAPI用的也不多了吧。.net、asp、jsp、php都不错~。不过vc写的ISAPI可以很灵活、效率高。
刚刚开始写ISAPI，一定要接触这几个宏
BEGIN_PARSE_MAP(CvStockExtension, CHttpServer)
?// TODO: 在此插入 ON_PARSE_COMMAND() 和
?// ON_PARSE_COMMAND_PARAMS() 以将命令挂钩。
?// 例如:
?
//下面两行是定义一个默认的请求处理动作，ITS_EMPTY说明没有参数。
?ON_PARSE_COMMAND(Default, CvStockExtension, ITS_EMPTY)
?DEFAULT_PARSE_COMMAND(Default, CvStockExtension)
//下面两行定义一个有7个参数的处理函数ITS表示字符型。第二行对应参数名或默认值。
?ON_PARSE_COMMAND(SaveBuy, CvStockExtension, ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR)
?ON_PARSE_COMMAND_PARAMS("userid code market buy sum des='' totalCost='0'")
//下面的就不用多说了。
?ON_PARSE_COMMAND(SaveSell, CvStockExtension, ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR ITS_PSTR)
?ON_PARSE_COMMAND_PARAMS("userid code market buy sum des='' totalCost='0'")
END_PARSE_MAP(CvStockExtension)
相样的请求函数定义如下，注意参数就可以了。
?void Default(CHttpServerContext* pCtxt);
?void SaveBuy(CHttpServerContext* pCtxt,LPTSTR userid,LPTSTR code,LPTSTR market,LPTSTR buy,LPTSTR sum,LPTSTR des,LPTSTR totalCost);
?void SaveSell(CHttpServerContext* pCtxt,LPTSTR userid,LPTSTR code,LPTSTR market,LPTSTR buy,LPTSTR sum,LPTSTR des,LPTSTR totalCost);
另外在IIS配置中有一个选项。“是否缓存ISAPI程序”。如果选择缓存的话，这时你在ISAPI程序中申请的全局内存块可以被所有的请求客户（比如IE）端看到，可以利用这个来处理需要为所为客户端共享的数据，比如：聊天程序的聊天记录~。速度比放到数据库里可以快很多，但要注意做好互斥。如果设置成不缓存，就是每个请求之间不可见的了~
另外还有一个就是ISAPI中取得cookie信息的方法如下：
@_@代码在公司，此处先省略若干字~~~明天补齐~~
最后一点（罗唆吧？），就在如果在ISAPI中用Mutex或CreateFileMapping的话，可以会不能成功找开，因为ISAPI运行帐号权限太低~，解决办法可以参考下面代码：
HANDLE CMemRecord::ObtainAccessableMutex( BOOL bInitialOwner, LPTSTR szName )
{
SID_IDENTIFIER_AUTHORITY siaWorld = SECURITY_WORLD_SID_AUTHORITY;
PSID psidEveryone = NULL;
HANDLE hMutex = NULL ;
int nSidSize ;
int nAclSize ;
PACL paclNewDacl = NULL;
SECURITY_DESCRIPTOR sd ;
SECURITY_ATTRIBUTES sa ;
__try{
// Create the everyone sid
if (!AllocateAndInitializeSid(&siaWorld, 1, SECURITY_WORLD_RID, 0,
0, 0, 0, 0, 0, 0, &psidEveryone))
{
psidEveryone = NULL ;
__leave;
}
nSidSize = GetLengthSid(psidEveryone) ;
nAclSize = nSidSize * 2 + sizeof(ACCESS_ALLOWED_ACE) + sizeof(ACCESS_DENIED_ACE) + sizeof(ACL) ;
paclNewDacl = (PACL) LocalAlloc( LPTR, nAclSize ) ;
if( !paclNewDacl )
__leave ;
if(!InitializeAcl( paclNewDacl, nAclSize, ACL_REVISION ))
__leave ;
if(!AddAccessDeniedAce( paclNewDacl, ACL_REVISION, WRITE_DAC | WRITE_OWNER, psidEveryone ))
__leave ;
// I am using GENERIC_ALL here so that this very code can be applied to
// other objects. Specific access should be applied when possible.
if(!AddAccessAllowedAce( paclNewDacl, ACL_REVISION, GENERIC_ALL, psidEveryone ))
__leave ;
if(!InitializeSecurityDescriptor( &sd, SECURITY_DESCRIPTOR_REVISION ))
__leave ;
if(!SetSecurityDescriptorDacl( &sd, TRUE, paclNewDacl, FALSE ))
__leave ;
sa.nLength = sizeof( sa ) ;
sa.bInheritHandle = FALSE ;
sa.lpSecurityDescriptor = &sd ;
hMutex = CreateMutex( &sa, bInitialOwner, szName ) ;
if( !hMutex )
hMutex = OpenMutex( SYNCHRONIZE, FALSE, szName ) ;
}__finally{
if( !paclNewDacl )
LocalFree( paclNewDacl ) ;
if( !psidEveryone )
FreeSid( psidEveryone ) ;
}
return hMutex ;
}
HANDLE CMemRecord::ObtainAccessableFileMapping( DWORD nSize, LPTSTR szName )
{
SID_IDENTIFIER_AUTHORITY siaWorld = SECURITY_WORLD_SID_AUTHORITY;
PSID psidEveryone = NULL;
HANDLE hMapFile = NULL ;
int nSidSize ;
int nAclSize ;
PACL paclNewDacl = NULL;
SECURITY_DESCRIPTOR sd ;
SECURITY_ATTRIBUTES sa ;
__try{
// Create the everyone sid
if (!AllocateAndInitializeSid(&siaWorld, 1, SECURITY_WORLD_RID, 0,
0, 0, 0, 0, 0, 0, &psidEveryone))
{
psidEveryone = NULL ;
__leave;
}
nSidSize = GetLengthSid(psidEveryone) ;
nAclSize = nSidSize * 2 + sizeof(ACCESS_ALLOWED_ACE) + sizeof(ACCESS_DENIED_ACE) + sizeof(ACL) ;
paclNewDacl = (PACL) LocalAlloc( LPTR, nAclSize ) ;
if( !paclNewDacl )
__leave ;
if(!InitializeAcl( paclNewDacl, nAclSize, ACL_REVISION ))
__leave ;
// if(!AddAccessDeniedAce( paclNewDacl, ACL_REVISION, WRITE_DAC | WRITE_OWNER, psidEveryone ))
// __leave ;
// I am using GENERIC_ALL here so that this very code can be applied to
// other objects. Specific access should be applied when possible.
if(!AddAccessAllowedAce( paclNewDacl, ACL_REVISION, GENERIC_ALL, psidEveryone ))
__leave ;
if(!InitializeSecurityDescriptor( &sd, SECURITY_DESCRIPTOR_REVISION ))
__leave ;
if(!SetSecurityDescriptorDacl( &sd, TRUE, paclNewDacl, FALSE ))
__leave ;
sa.nLength = sizeof( sa ) ;
sa.bInheritHandle = FALSE ;
sa.lpSecurityDescriptor = &sd ;
/*
hMutex = CreateMutex( &sa, bInitialOwner, szName ) ;
if( !hMutex )
hMutex = OpenMutex( SYNCHRONIZE, FALSE, szName ) ;
*/
hMapFile = CreateFileMapping(INVALID_HANDLE_VALUE, // current file handle
&sa, // default security
PAGE_READWRITE, // read/write permission
0, // max. object size
nSize, // size of hFile
szName); // name of mapping object
if (hMapFile == NULL)
{
hMapFile=OpenFileMapping(SYNCHRONIZE,FALSE,szName);
if(hMapFile==NULL)
{
DWORD dError = GetLastError();
TRACE("Could not create file mapping object.\r\n");
}
}
}__finally{
if( !paclNewDacl )
LocalFree( paclNewDacl ) ;
if( !psidEveryone )
FreeSid( psidEveryone ) ;
}
return hMapFile ;
}
好了~88~
