352 lines
11 KiB
C
352 lines
11 KiB
C
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/*--
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Copyright (c) 1995-1998 Microsoft Corporation
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Module Name: REQUEST.H
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Author: Arul Menezes
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Abstract: HTTP request class
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--*/
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// Scalar types used by CHTTPRequest
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typedef enum {
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TOK_GET=1,
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TOK_HEAD,
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TOK_POST,
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TOK_UNKNOWN_VERB,
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TOK_DATE,
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TOK_PRAGMA,
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TOK_COOKIE,
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TOK_ACCEPT,
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TOK_REFERER,
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TOK_UAGENT,
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TOK_AUTH,
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TOK_IFMOD,
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TOK_TYPE,
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TOK_LENGTH,
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TOK_ENCODING,
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TOK_CONNECTION,
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}
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TOKEN;
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typedef enum
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{
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CONN_NONE = 0,
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CONN_CLOSE = 1,
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CONN_KEEP = 2,
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}
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CONNHEADER;
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#define CHTTPREQUEST_SIG 0xAB0D
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// This object is the top-level object for an incoming HTTP request. One such object
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// is created per request & a thread is created to handle it.
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class CFilterInfo;
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class CHttpRequest
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{
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// socket
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DWORD m_dwSig;
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SOCKET m_socket;
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// buffers
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CBuffer m_bufRequest;
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CBuffer m_bufRespBody;
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// method, version, URL etc. Direct results of parse
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PSTR m_pszMethod;
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PSTR m_pszURL;
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PSTR m_pszContentType;
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DWORD m_dwContentLength;
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PSTR m_pszAccept;
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FILETIME m_ftIfModifiedSince;
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DWORD m_dwIfModifiedLength;
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BOOL m_fKeepAlive;
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PSTR m_pszCookie;
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// Decoded URL (indirect results of parse)
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PSTR m_pszQueryString;
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PWSTR m_wszPath;
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PWSTR m_wszExt;
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PSTR m_pszPathInfo;
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PSTR m_pszPathTranslated;
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// VRoot information
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SCRIPT_TYPE m_VRootScriptType;
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DWORD m_dwPermissions;
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AUTHLEVEL m_AuthLevelReqd;
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// Logging members
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PSTR m_pszLogParam;
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RESPONSESTATUS m_rs;
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BOOL m_fBufferedResponse; // Are we using m_bufResponse or sending straight to client?
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// Async support
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HANDLE m_hEvent;
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DWORD m_dwStatus;
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LPEXTENSION_CONTROL_BLOCK m_pECB;
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PVOID m_pvContext;
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PFN_HSE_IO_COMPLETION m_pfnCompletion;
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// Parsing functions
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void FreeHeaders(void)
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{
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MyFree(m_pszMethod);
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MyFree(m_pszURL);
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MyFree(m_pszContentType);
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MyFree(m_pszAccept);
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MyFree(m_pszQueryString);
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MyFree(m_wszPath);
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MyFree(m_wszExt);
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MyFree(m_pszCookie);
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MyFree(m_pszLogParam);
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MyFree(m_pszPathInfo);
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MyFree(m_pszPathTranslated);
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}
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BOOL ParseHeaders();
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BOOL MyCrackURL(PSTR pszRawURL, int iLen);
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public:
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BOOL ParseMethod(PCSTR pszMethod, int cbMethod);
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BOOL ParseContentLength(PCSTR pszMethod, TOKEN id);
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BOOL ParseContentType(PCSTR pszMethod, TOKEN id);
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BOOL ParseIfModifiedSince(PCSTR pszMethod, TOKEN id);
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BOOL ParseAuthorization(PCSTR pszMethod, TOKEN id);
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BOOL ParseAccept(PCSTR pszMethod, TOKEN id);
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BOOL ParseConnection(PCSTR pszMethod, TOKEN id);
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BOOL ParseCookie(PCSTR pszMethod, TOKEN id);
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BOOL HandleNTLMAuth(PSTR pszNTLMData);
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PSTR m_pszNTLMOutBuf; // buffer to send client on NTLM response, Base64 encoded
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DWORD m_dwVersion; // LOWORD=minor, HIWORD=major.
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TOKEN m_idMethod;
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CBuffer m_bufRespHeaders;
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CFilterInfo *m_pFInfo; // Filter state information
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private:
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// Authentication data members
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AUTHLEVEL m_AuthLevelGranted;
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PSTR m_pszAuthType;
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PSTR m_pszRawRemoteUser; // Holds base64 encoded data, before auth decodes it
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PSTR m_pszRemoteUser;
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PSTR m_pszPassword;
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AUTH_NTLM m_NTLMState; // state info for NTLM process, needs to be saved across requests
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DWORD m_dwAuthFlags;
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WCHAR *m_wszVRootUserList; // Do NOT free this, points to global mem. Contains user/group ACL
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// Authentication functions
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void FreeAuth(void)
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{
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MyFree(m_pszAuthType);
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MyFree(m_pszRawRemoteUser);
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MyFree(m_pszRemoteUser);
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MyFree(m_pszPassword);
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MyFree(m_pszNTLMOutBuf);
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// Don't free NTLM structs in here
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}
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BOOL CheckAuth(AUTHLEVEL AuthLevelReqd)
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{
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return ( (AuthLevelReqd <= m_AuthLevelGranted));
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}
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BOOL CheckAuth() { return CheckAuth(m_AuthLevelReqd); }
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// File GET/HEAD handling functions
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BOOL IsNotModified(HANDLE hFile, DWORD dwLength);
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static RESPONSESTATUS GLEtoStatus(int iGLE);
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// Directory: Default page & browsing functions
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BOOL MapDirToDefaultPage(void);
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BOOL EmitDirListing(void);
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void Init();
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BOOL ReadPostData(DWORD dwMaxSizeToRead, BOOL fInitialPostRead);
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CONNHEADER GetConnHeader() { return m_fKeepAlive ? CONN_KEEP : CONN_CLOSE; }
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// ISAPI extension handling functions
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BOOL HandleScript();
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BOOL ExecuteISAPI(void);
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void FillECB(LPEXTENSION_CONTROL_BLOCK pECB);
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BOOL GetServerVariable(PSTR pszVar, PVOID pvOutBuf, PDWORD pdwOutSize, BOOL fFromFilter);
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BOOL WriteClient(PVOID pvBuf, PDWORD pdwSize, BOOL fFromFilter);
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BOOL WriteClientAsync(PVOID pvBuf, PDWORD pdwSize, BOOL fFromFilter);
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BOOL ServerSupportFunction(DWORD dwReq, PVOID pvBuf, PDWORD pdwSize, PDWORD pdwType);
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BOOL ReadClient(PVOID pv, PDWORD pdw);
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void StartRemoveISAPICacheIfNeeded();
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// Filter Specific
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BOOL FillFC(PHTTP_FILTER_CONTEXT pfc, DWORD dwNotifyType,
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LPVOID *ppStFilter, LPVOID *ppStFilterOrg,
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PSTR *ppvBuf1, int *pcbBuf, PSTR *ppvBuf2, int *pcbBuf2);
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void CleanupFC(DWORD dwNotifyType, LPVOID* pFilterStruct, LPVOID *pFilterStructOrg,
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PSTR *ppvBuf1, int *pcbBuf, PSTR *ppvBuf2);
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BOOL AuthenticateFilter();
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BOOL FilterMapURL(PSTR pvBuf, WCHAR *wszPath, DWORD *pdwSize, DWORD dwBufNeeded, PSTR pszURLEx=NULL);
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BOOL MapURLToPath(PSTR pszBuffer, PDWORD pdwSize, LPHSE_URL_MAPEX_INFO pUrlMapEx=NULL);
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// Filter Callbacks
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BOOL ServerSupportFunction(enum SF_REQ_TYPE sfReq,PVOID pData,ULONG_PTR ul1, ULONG_PTR ul2);
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BOOL GetHeader(LPSTR lpszName, LPVOID lpvBuffer, LPDWORD lpdwSize);
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BOOL SetHeader(LPSTR lpszName, LPSTR lpszValue);
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BOOL AddResponseHeaders(LPSTR lpszHeaders,DWORD dwReserved);
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// ASP Setup Fcns
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BOOL ExecuteASP();
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BOOL FillACB(void *p, HINSTANCE hInst);
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public:
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CHttpRequest(SOCKET sock)
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{
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Init();
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m_socket = sock;
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// Fixes BUG 11771. On a poorly formatted request line, if we didn't
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// read in the http version right we assumed it's value was 0, since 0 < 1.0
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// we'd treat this as a http/0.9 request, no headers would be sent.
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m_dwVersion = MAKELONG(0,1);
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}
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~CHttpRequest();
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BOOL ReInit();
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void HandleRequest();
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friend DWORD WINAPI HttpConnectionThread(LPVOID lpv);
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void GenerateLog(PSTR szBuffer, DWORD_PTR *pdwToWrite);
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// BOOL SetupHeader(PSTR *ppszHeader, int *piHeader, PSTR *ppszExtra, int *piExtra, BOOL fAccessDenied);
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DWORD GetLogBufferSize();
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// ISAPI Extension / ASP Specific
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friend BOOL WINAPI GetServerVariable(HCONN hConn, PSTR psz, PVOID pv, PDWORD pdw);
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friend BOOL WINAPI ReadClient(HCONN hConn, PVOID pv, PDWORD pdw);
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friend BOOL WINAPI WriteClient(HCONN hConn, PVOID pv, PDWORD pdw, DWORD dw);
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friend BOOL WINAPI ServerSupportFunction(HCONN hConn, DWORD dwReq, PVOID pvBuf, PDWORD pdwSize, PDWORD pdwType);
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// ASP SPECIFIC
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friend BOOL WINAPI Flush(HCONN hConn);
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friend BOOL WINAPI Clear(HCONN hConn);
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friend BOOL WINAPI SetBuffer(HCONN hConn, BOOL fBuffer);
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friend BOOL WINAPI AddHeader (HCONN hConn, LPSTR lpszName, LPSTR lpszValue);
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// FILTER SPECIFIC
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BOOL CallFilter(DWORD dwNotifyType, PSTR *ppvBuf1 = NULL,int *pcbBuf = NULL,
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PSTR *ppvBuf2 = NULL, int *pcbBuf2 = NULL);
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BOOL FilterNoResponse(void);
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// Filters Friends (exposed to Filter dll)
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friend BOOL WINAPI GetServerVariable(PHTTP_FILTER_CONTEXT pfc, PSTR psz, PVOID pv, PDWORD pdw);
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friend BOOL WINAPI AddResponseHeaders(PHTTP_FILTER_CONTEXT pfc,LPSTR lpszHeaders,DWORD dwReserved);
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friend VOID* WINAPI AllocMem(PHTTP_FILTER_CONTEXT pfc, DWORD cbSize, DWORD dwReserved);
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friend BOOL WINAPI WriteClient(PHTTP_FILTER_CONTEXT pfc, PVOID pv, PDWORD pdw, DWORD dwFlags);
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friend BOOL WINAPI ServerSupportFunction(PHTTP_FILTER_CONTEXT pfc,enum SF_REQ_TYPE sfReq,
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PVOID pData, ULONG_PTR ul1, ULONG_PTR ul2);
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friend BOOL WINAPI SetHeader(PHTTP_FILTER_CONTEXT pfc, LPSTR lpszName, LPSTR lpszValue);
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friend BOOL WINAPI GetHeader(PHTTP_FILTER_CONTEXT pfc, LPSTR lpszName, LPVOID lpvBuffer, LPDWORD lpdwSize);
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};
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void SendFile(SOCKET sock, HANDLE hFile, CHttpRequest *pRequest);
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// Response object. This object doesn't own any of the handles or pointers
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// it uses so it doesnt free anything. The caller is responsible in all cases
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// for keeping the handles & memory alive while this object is extant & freeing
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// them as approp at a later time
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class CHttpResponse
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{
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SOCKET m_socket;
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RESPONSESTATUS m_rs;
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CONNHEADER m_connhdr;
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PCSTR m_pszType;
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DWORD m_dwLength;
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PCSTR m_pszRedirect;
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PCSTR m_pszExtraHeaders;
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PCSTR m_pszBody;
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HANDLE m_hFile;
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char m_szMime[MAXMIME];
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CHttpRequest *m_pRequest; // calling request class, for callbacks
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private:
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void SetTypeFromExtW(PCWSTR wszExt)
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{
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DEBUGCHK(!m_pszType);
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m_szMime[0] = 0;
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if(wszExt)
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{
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CReg reg(HKEY_CLASSES_ROOT, wszExt);
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MyW2A(reg.ValueSZ(L"Content Type"), m_szMime, sizeof(m_szMime));
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}
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if(m_szMime[0])
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m_pszType = m_szMime;
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else
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m_pszType = cszTextHtml;
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}
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public:
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CHttpResponse(SOCKET sock, RESPONSESTATUS status, CONNHEADER connhdr, CHttpRequest *pRequest=NULL)
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{
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ZEROMEM(this);
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m_socket = sock;
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m_rs = status;
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m_connhdr = connhdr;
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m_pRequest = pRequest;
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}
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// for generated bodies (dir listings, redirects etc) & default bodies
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void SetBody(PCSTR pszBody, PCSTR pszType)
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{
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DEBUGCHK(!m_hFile && !m_pszBody && !m_pszType && !m_dwLength);
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m_pszType = pszType;
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m_dwLength = strlen(pszBody);
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m_pszBody = pszBody;
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}
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// for error reponses (NOTE: some have no body, and hence psztatusBdy will be NULL in the table)
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void SetDefaultBody()
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{
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if(rgStatus[m_rs].pszStatusBody)
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SetBody(rgStatus[m_rs].pszStatusBody, cszTextHtml);
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}
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// for real files
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void SetBody(HANDLE hFile, PCWSTR wszExt=NULL, DWORD dwLen=0)
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{
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DEBUGCHK(!m_hFile && !m_pszBody && !m_pszType && !m_dwLength);
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m_hFile = hFile;
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SetTypeFromExtW(wszExt);
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if (dwLen)
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m_dwLength = dwLen;
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else
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{
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m_dwLength = GetFileSize(m_hFile, 0);
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if (m_dwLength == 0)
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m_dwLength = -1; // Use this to signify empty file, needed for keep-alives
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}
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}
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private:
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void SendBody();
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public:
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void SendHeaders(PCSTR pszExtraHeaders, PCSTR pszNewRespStatus);
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void SendRedirect(PCSTR pszRedirect, BOOL fFromFilter=FALSE);
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void SendResponse(PCSTR pszExtraHeaders=NULL, PCSTR pszNewRespStatus=NULL, BOOL fFromFilter=FALSE)
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{
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// see FilterNoResponse for comments on this
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if (!fFromFilter && m_pRequest->FilterNoResponse())
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return;
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SendHeaders(pszExtraHeaders,pszNewRespStatus);
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SendBody();
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}
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};
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