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/********
*
* Copyright (c) 1995 Process Software Corporation
*
* Copyright (c) 1995-1996 Microsoft Corporation
*
*
* Module Name : HttpExt.h
*
* Abstract :
*
* This module contains the structure definitions and prototypes for the
* version 2.0 HTTP Server Extension interface.
*
******************/
#ifndef _HTTPEXT_H_
#define _HTTPEXT_H_
#include <windows.h>
#ifdef __cplusplus
extern "C" {
#endif
#define HSE_VERSION_MAJOR 2 // major version of this spec
#define HSE_VERSION_MINOR 0 // minor version of this spec
#define HSE_LOG_BUFFER_LEN 80
#define HSE_MAX_EXT_DLL_NAME_LEN 256
typedef LPVOID HCONN;
// the following are the status codes returned by the Extension DLL
#define HSE_STATUS_SUCCESS 1
#define HSE_STATUS_SUCCESS_AND_KEEP_CONN 2
#define HSE_STATUS_PENDING 3
#define HSE_STATUS_ERROR 4
// The following are the values to request services with the ServerSupportFunction.
// Values from 0 to 1000 are reserved for future versions of the interface
#define HSE_REQ_BASE 0
#define HSE_REQ_SEND_URL_REDIRECT_RESP ( HSE_REQ_BASE + 1 )
#define HSE_REQ_SEND_URL ( HSE_REQ_BASE + 2 )
#define HSE_REQ_SEND_RESPONSE_HEADER ( HSE_REQ_BASE + 3 )
#define HSE_REQ_DONE_WITH_SESSION ( HSE_REQ_BASE + 4 )
#define HSE_REQ_END_RESERVED 1000
//
// These are Microsoft specific extensions
//
#define HSE_REQ_MAP_URL_TO_PATH (HSE_REQ_END_RESERVED+1)
#define HSE_REQ_GET_SSPI_INFO (HSE_REQ_END_RESERVED+2)
#define HSE_APPEND_LOG_PARAMETER (HSE_REQ_END_RESERVED+3)
#define HSE_REQ_SEND_URL_EX (HSE_REQ_END_RESERVED+4)
#define HSE_REQ_IO_COMPLETION (HSE_REQ_END_RESERVED+5)
#define HSE_REQ_TRANSMIT_FILE (HSE_REQ_END_RESERVED+6)
#define HSE_REQ_REFRESH_ISAPI_ACL (HSE_REQ_END_RESERVED+7)
//
// Bit Flags for TerminateExtension
//
// HSE_TERM_ADVISORY_UNLOAD - Server wants to unload the extension,
// extension can return TRUE if OK, FALSE if the server should not
// unload the extension
//
// HSE_TERM_MUST_UNLOAD - Server indicating the extension is about to be
// unloaded, the extension cannot refuse.
//
#define HSE_TERM_ADVISORY_UNLOAD 0x00000001
#define HSE_TERM_MUST_UNLOAD 0x00000002
//
// Flags for IO Functions, supported for IO Funcs.
// TF means ServerSupportFunction( HSE_REQ_TRANSMIT_FILE)
//
# define HSE_IO_SYNC 0x00000001 // for WriteClient
# define HSE_IO_ASYNC 0x00000002 // for WriteClient/TF
# define HSE_IO_DISCONNECT_AFTER_SEND 0x00000004 // for TF
# define HSE_IO_SEND_HEADERS 0x00000008 // for TF
//
// passed to GetExtensionVersion
//
typedef struct _HSE_VERSION_INFO {
DWORD dwExtensionVersion;
CHAR lpszExtensionDesc[HSE_MAX_EXT_DLL_NAME_LEN];
} HSE_VERSION_INFO, *LPHSE_VERSION_INFO;
//
// passed to extension procedure on a new request
//
typedef struct _EXTENSION_CONTROL_BLOCK {
DWORD cbSize; // size of this struct.
DWORD dwVersion; // version info of this spec
HCONN ConnID; // Context number not to be modified!
DWORD dwHttpStatusCode; // HTTP Status code
CHAR lpszLogData[HSE_LOG_BUFFER_LEN];// null terminated log info specific to this Extension DLL
LPSTR lpszMethod; // REQUEST_METHOD
LPSTR lpszQueryString; // QUERY_STRING
LPSTR lpszPathInfo; // PATH_INFO
LPSTR lpszPathTranslated; // PATH_TRANSLATED
DWORD cbTotalBytes; // Total bytes indicated from client
DWORD cbAvailable; // Available number of bytes
LPBYTE lpbData; // pointer to cbAvailable bytes
LPSTR lpszContentType; // Content type of client data
BOOL (WINAPI * GetServerVariable) ( HCONN hConn,
LPSTR lpszVariableName,
LPVOID lpvBuffer,
LPDWORD lpdwSize );
BOOL (WINAPI * WriteClient) ( HCONN ConnID,
LPVOID Buffer,
LPDWORD lpdwBytes,
DWORD dwReserved );
BOOL (WINAPI * ReadClient) ( HCONN ConnID,
LPVOID lpvBuffer,
LPDWORD lpdwSize );
BOOL (WINAPI * ServerSupportFunction)( HCONN hConn,
DWORD dwHSERRequest,
LPVOID lpvBuffer,
LPDWORD lpdwSize,
LPDWORD lpdwDataType );
} EXTENSION_CONTROL_BLOCK, *LPEXTENSION_CONTROL_BLOCK;
//
// these are the prototypes that must be exported from the extension DLL
//
BOOL WINAPI GetExtensionVersion( HSE_VERSION_INFO *pVer );
DWORD WINAPI HttpExtensionProc( EXTENSION_CONTROL_BLOCK *pECB );
BOOL WINAPI TerminateExtension( DWORD dwFlags );
// the following type declarations is for the server side
typedef BOOL (WINAPI * PFN_GETEXTENSIONVERSION)( HSE_VERSION_INFO *pVer );
typedef DWORD (WINAPI * PFN_HTTPEXTENSIONPROC )( EXTENSION_CONTROL_BLOCK *pECB );
typedef BOOL (WINAPI * PFN_TERMINATEEXTENSION )( DWORD dwFlags );
typedef VOID
(WINAPI * PFN_HSE_IO_COMPLETION)(
IN EXTENSION_CONTROL_BLOCK * pECB,
IN PVOID pContext,
IN DWORD cbIO,
IN DWORD dwError
);
//
// HSE_TF_INFO defines the type for HTTP SERVER EXTENSION support for
// ISAPI applications to send files using TransmitFile.
// A pointer to this object should be used with ServerSupportFunction()
// for HSE_REQ_TRANSMIT_FILE.
//
typedef struct _HSE_TF_INFO {
//
// callback and context information
// the callback function will be called when IO is completed.
// the context specified will be used during such callback.
//
// These values (if non-NULL) will override the one set by calling
// ServerSupportFunction() with HSE_REQ_IO_COMPLETION
//
PFN_HSE_IO_COMPLETION pfnHseIO;
PVOID pContext;
// file should have been opened with FILE_FLAG_SEQUENTIAL_SCAN
HANDLE hFile;
//
// HTTP header and status code
// These fields are used only if HSE_IO_SEND_HEADERS is present in dwFlags
//
LPCSTR pszStatusCode; // HTTP Status Code eg: "200 OK"
DWORD BytesToWrite; // special value of "0" means write entire file.
DWORD Offset; // offset value within the file to start from
PVOID pHead; // Head buffer to be sent before file data
DWORD HeadLength; // header length
PVOID pTail; // Tail buffer to be sent after file data
DWORD TailLength; // tail length
DWORD dwFlags; // includes HSE_IO_DISCONNECT_AFTER_SEND, ...
} HSE_TF_INFO, * LPHSE_TF_INFO;
#ifdef __cplusplus
}
#endif
#endif // end definition _HTTPEXT_H_
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