122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
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/*--
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Copyright (c) 1995-1998 Microsoft Corporation
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Module Name: ISAPI.H
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Author: Arul Menezes
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Abstract: ISAPI Exten & Filter handling classes
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--*/
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typedef enum
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{
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SCRIPT_TYPE_NONE = 0,
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SCRIPT_TYPE_EXTENSION,
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SCRIPT_TYPE_ASP,
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SCRIPT_TYPE_FILTER
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}
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SCRIPT_TYPE;
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typedef DWORD (WINAPI *PFN_HTTPFILTERPROC)(HTTP_FILTER_CONTEXT* pfc, DWORD NotificationType, VOID* pvNotification);
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typedef BOOL (WINAPI *PFN_GETFILTERVERSION)(HTTP_FILTER_VERSION* pVer);
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typedef BOOL (WINAPI *PFN_TERMINATEFILTER)(DWORD dwFlags);
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typedef void (WINAPI *PFN_TERMINATEASP)();
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typedef DWORD (WINAPI *PFN_EXECUTEASP)(PASP_CONTROL_BLOCK pASPBlock);
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class CISAPICache;
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BOOL InitExtensions(CISAPICache **ppISAPICache, DWORD *pdwCacheSleep);
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int RecvToBuf(SOCKET socket,PVOID pv, DWORD dw,DWORD dwTimeout=RECVTIMEOUT);
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class CISAPI
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{
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friend CISAPICache;
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// ISAPI extension & filter handling data members
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SCRIPT_TYPE m_scriptType; // Extension, Filter, or ASP?
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HINSTANCE m_hinst;
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FARPROC m_pfnGetVersion;
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FARPROC m_pfnHttpProc;
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FARPROC m_pfnTerminate;
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DWORD dwFilterFlags; // Flags negotiated on GetFilterVersion
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// Used by the caching class
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PWSTR m_wszDLLName; // full path of ISAPI Dll
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DWORD m_cRef; // Reference Count
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__int64 m_ftLastUsed; // Last used, treat as FILETIME struct
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public:
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CISAPI(SCRIPT_TYPE st)
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{
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ZEROMEM(this);
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m_scriptType = st;
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}
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~CISAPI() { MyFree(m_wszDLLName); }
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void Unload(PWSTR wszDLLName=NULL);
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BOOL Load(PWSTR wszPath);
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void CoFreeUnusedLibrariesIfASP()
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{
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if (m_scriptType == SCRIPT_TYPE_ASP)
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{
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// calls into ASP exported function, which calls CoFreeUnusedLibraries
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// but does nothing else. We don't call CoFreeUnusedLibraries from the web
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// server directly because we don't want to have to link it to COM.
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// Does not free asp.dll, because we have a reference to it in the server.
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((PFN_TERMINATEASP)m_pfnTerminate)();
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}
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}
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DWORD CallExtension(EXTENSION_CONTROL_BLOCK * pECB) { return ((PFN_HTTPEXTENSIONPROC)m_pfnHttpProc)(pECB); }
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DWORD CallFilter(HTTP_FILTER_CONTEXT* pfc, DWORD n, VOID* pv) { return ((PFN_HTTPFILTERPROC)m_pfnHttpProc)(pfc, n, pv); }
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DWORD CallASP(PASP_CONTROL_BLOCK pACB) { return ((PFN_EXECUTEASP) m_pfnHttpProc)(pACB); }
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DWORD GetFilterFlags() { return dwFilterFlags; }
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};
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typedef struct _isapi_node
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{
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CISAPI *m_pISAPI; // class has library and entry point functions
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struct _isapi_node *m_pNext;
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} ISAPINODE, *PISAPINODE;
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class CISAPICache
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{
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private:
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PISAPINODE m_pHead;
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CRITICAL_SECTION m_CritSec;
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public:
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CISAPICache()
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{
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ZEROMEM(this);
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InitializeCriticalSection(&m_CritSec);
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}
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~CISAPICache()
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{
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DeleteCriticalSection(&m_CritSec);
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}
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HINSTANCE Load(PWSTR wszDLLName, CISAPI **ppISAPI, SCRIPT_TYPE st=SCRIPT_TYPE_EXTENSION);
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void Unload(CISAPI *pISAPI)
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{
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SYSTEMTIME st;
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if (NULL == pISAPI)
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return;
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EnterCriticalSection(&m_CritSec);
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GetSystemTime(&st);
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SystemTimeToFileTime(&st,(FILETIME *) &pISAPI->m_ftLastUsed);
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pISAPI->m_cRef--;
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LeaveCriticalSection(&m_CritSec);
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}
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void RemoveUnusedISAPIs(BOOL fRemoveAll);
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friend DWORD WINAPI RemoveUnusedISAPIs(LPVOID lpv);
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};
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