96 lines
3 KiB
C
96 lines
3 KiB
C
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/*--
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Copyright (c) 1995-1998 Microsoft Corporation
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Module Name: BUFFIO.H
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Author: Arul Menezes
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Abstract: Buffer handling class & socket IO helpers
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--*/
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// returned from the socket IO functions
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typedef enum
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{
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INPUT_OK = 0,
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INPUT_TIMEOUT = 1,
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INPUT_ERROR = 2,
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INPUT_NOCHANGE = 3
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//INPUT_EOF = 2,
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}
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HRINPUT;
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class CHttpRequest; // forward declaration
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int MySelect(SOCKET sock, DWORD dwMillisecs);
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//
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// There is one such buffer for all the headers of a request and another for the POST-body if any
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//
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class CBuffer
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{
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private:
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PSTR m_pszBuf;
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int m_iSize;
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int m_iNextOut;
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int m_iNextIn;
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int m_iNextInFollow; // next place to read, needed by raw read filters.
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CHAR m_chSaved; // Used by the parser
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BOOL AllocMem(DWORD dwLen);
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BOOL NextToken(PSTR* ppszTok, int* piLen, BOOL fWS, BOOL fColon = FALSE);
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public:
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CBuffer() {
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memset(this, 0, sizeof(*this));
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}
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~CBuffer() {
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MyFree(m_pszBuf);
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}
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// Used to reset a buffer through the course of 1 session, uses
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// same allocated mem block. (don't change m_iSize)
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void Reset()
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{
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m_iNextInFollow = m_iNextOut = m_iNextIn = m_chSaved = 0;
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}
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// accessors
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DWORD Count() { return m_iNextIn - m_iNextOut; }
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BOOL HasPostData() { return (m_iNextIn > m_iNextOut); }
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PBYTE Data() { return (PBYTE)(m_pszBuf + m_iNextOut); }
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DWORD UnaccessedCount() { return m_iNextIn - m_iNextInFollow; } // this is data that hasn't been modified yet, for filters
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DWORD AvailableBufferSize() { return m_iSize - m_iNextInFollow; } // size of buffer, used by filters
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PBYTE FilterRawData() { return (PBYTE)(m_pszBuf + m_iNextInFollow); }
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PSTR Headers() { return m_pszBuf; } // Http headers are at beginning of buf
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DWORD GetINextOut() { return m_iNextOut; }
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BOOL TrimWhiteSpace();
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// input functions
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HRINPUT RecvToBuf(SOCKET sock, DWORD dwLength, DWORD dwTimeout,BOOL fFromFilter=FALSE);
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HRINPUT RecvHeaders(SOCKET sock)
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{
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DEBUGCHK(!m_iNextOut && !m_iNextIn);
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return RecvToBuf(sock, (DWORD)-1, KEEPALIVETIMEOUT);
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};
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HRINPUT RecvBody(SOCKET sock, DWORD dwLength, BOOL fFromFilter = FALSE)
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{
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DEBUGCHK(m_pszBuf && m_iSize);
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DEBUGCHK(m_iNextOut <= m_iNextIn);
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DEBUGCHK(m_iNextInFollow <= m_iNextIn);
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return RecvToBuf(sock, dwLength, RECVTIMEOUT,fFromFilter);
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};
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BOOL NextTokenWS(PSTR* ppszTok, int * piLen) { return NextToken(ppszTok, piLen, TRUE); }
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BOOL NextTokenEOL(PSTR* ppszTok, int * piLen) { return NextToken(ppszTok, piLen, FALSE); }
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BOOL NextTokenColon(PSTR* ppszTok, int * piLen) { return NextToken(ppszTok, piLen, TRUE, TRUE); }
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BOOL NextLine();
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BOOL AddHeader(PSTR pszName, PSTR pszValue, BOOL fAddColon=FALSE);
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// output functions
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BOOL AppendData(PSTR pszData, int iLen);
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BOOL SendBuffer(SOCKET sock, CHttpRequest *pRequest);
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BOOL FilterDataUpdate(PVOID pvData, DWORD cbData, BOOL fModifiedPointer);
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};
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