Initial import of SpinxSE, with fixes for MariaDB.

storage/sphinx/snippets_udf.cc

@@ -0,0 +1,766 @@
+//
+// $Id: snippets_udf.cc 2058 2009-11-07 04:01:57Z shodan $
+//
+
+//
+// Copyright (c) 2001-2008, Andrew Aksyonoff. All rights reserved.
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License. You should have
+// received a copy of the GPL license along with this program; if you
+// did not, you can find it at http://www.gnu.org/
+//
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#include <sys/un.h>
+#include <netdb.h>
+
+#include <mysql_version.h>
+
+#if MYSQL_VERSION_ID>50100
+#include "mysql_priv.h"
+#include <mysql/plugin.h>
+#else
+#include "../mysql_priv.h"
+#endif
+
+#include <mysys_err.h>
+#include <my_sys.h>
+
+#if MYSQL_VERSION_ID>=50120
+typedef uchar byte;
+#endif
+
+/// partially copy-pasted stuff that should be moved elsewhere
+
+#if UNALIGNED_RAM_ACCESS
+
+/// pass-through wrapper
+template < typename T > inline T sphUnalignedRead ( const T & tRef )
+{
+	return tRef;
+}
+
+/// pass-through wrapper
+template < typename T > void sphUnalignedWrite ( void * pPtr, const T & tVal )
+{
+	*(T*)pPtr = tVal;
+}
+
+#else
+
+/// unaligned read wrapper for some architectures (eg. SPARC)
+template < typename T >
+inline T sphUnalignedRead ( const T & tRef )
+{
+	T uTmp;
+	byte * pSrc = (byte *) &tRef;
+	byte * pDst = (byte *) &uTmp;
+	for ( int i=0; i<(int)sizeof(T); i++ )
+		*pDst++ = *pSrc++;
+	return uTmp;
+}
+
+/// unaligned write wrapper for some architectures (eg. SPARC)
+template < typename T >
+void sphUnalignedWrite ( void * pPtr, const T & tVal )
+{
+	byte * pDst = (byte *) pPtr;
+	byte * pSrc = (byte *) &tVal;
+	for ( int i=0; i<(int)sizeof(T); i++ )
+		*pDst++ = *pSrc++;
+}
+
+#endif
+
+#define SPHINXSE_MAX_ALLOC			(16*1024*1024)
+
+#define SafeDelete(_arg)		{ if ( _arg ) delete ( _arg );		(_arg) = NULL; }
+#define SafeDeleteArray(_arg)	{ if ( _arg ) delete [] ( _arg );	(_arg) = NULL; }
+
+#define Min(a,b) ((a)<(b)?(a):(b))
+
+typedef unsigned int DWORD;
+
+inline DWORD sphF2DW ( float f ) { union { float f; uint32 d; } u; u.f = f; return u.d; }
+
+static char * sphDup ( const char * sSrc, int iLen=-1 )
+{
+	if ( !sSrc )
+		return NULL;
+
+	if ( iLen<0 )
+		iLen = strlen(sSrc);
+
+	char * sRes = new char [ 1+iLen ];
+	memcpy ( sRes, sSrc, iLen );
+	sRes[iLen] = '\0';
+	return sRes;
+}
+
+static inline void sphShowErrno ( const char * sCall )
+{
+	char sError[256];
+	snprintf ( sError, sizeof(sError), "%s() failed: [%d] %s", sCall, errno, strerror(errno) );
+	my_error ( ER_QUERY_ON_FOREIGN_DATA_SOURCE, MYF(0), sError );
+}
+
+static const bool sphReportErrors = true;
+
+static bool sphSend ( int iFd, const char * pBuffer, int iSize, bool bReportErrors = false )
+{
+	assert ( pBuffer );
+	assert ( iSize > 0 );
+
+	const int iResult = send ( iFd, pBuffer, iSize, 0 );
+	if ( iResult != iSize )
+	{
+		if ( bReportErrors ) sphShowErrno("send");
+		return false;
+	}
+	return true;
+}
+
+static bool sphRecv ( int iFd, char * pBuffer, int iSize, bool bReportErrors = false )
+{
+	assert ( pBuffer );
+	assert ( iSize > 0 );
+	
+	while ( iSize )
+	{
+		const int iResult = recv ( iFd, pBuffer, iSize, 0 );
+		if ( iResult > 0 )
+		{
+			iSize -= iResult;
+			pBuffer += iSize;
+		}
+		else if ( iResult == 0 )
+		{
+			if ( bReportErrors )
+				my_error ( ER_CONNECT_TO_FOREIGN_DATA_SOURCE, MYF(0), "recv() failed: disconnected" );
+			return false;
+		}
+		else
+		{
+			if ( bReportErrors ) sphShowErrno("recv");
+			return false;
+		}
+	}
+	return true;
+}
+
+enum
+{
+	SPHINX_SEARCHD_PROTO		= 1,
+
+	SEARCHD_COMMAND_SEARCH		= 0,
+	SEARCHD_COMMAND_EXCERPT		= 1,
+
+	VER_COMMAND_SEARCH		= 0x116,
+	VER_COMMAND_EXCERPT		= 0x100,
+};
+
+/// known answers
+enum
+{
+	SEARCHD_OK		= 0,	///< general success, command-specific reply follows
+	SEARCHD_ERROR	= 1,	///< general failure, error message follows
+	SEARCHD_RETRY	= 2,	///< temporary failure, error message follows, client should retry later
+	SEARCHD_WARNING	= 3		///< general success, warning message and command-specific reply follow
+};
+
+#define SPHINXSE_DEFAULT_SCHEME		"sphinx"
+#define SPHINXSE_DEFAULT_HOST		"127.0.0.1"
+#define SPHINXSE_DEFAULT_PORT		9312
+#define SPHINXSE_DEFAULT_INDEX		"*"
+
+class CSphBuffer
+{
+private:
+	bool m_bOverrun;
+	int m_iSize;
+	int m_iLeft;
+	char * m_pBuffer;
+	char * m_pCurrent;
+
+public:
+	CSphBuffer ( const int iSize )
+		: m_bOverrun ( false )
+		, m_iSize ( iSize )
+		, m_iLeft ( iSize )
+	{
+		assert ( iSize > 0 );
+		m_pBuffer = new char[iSize];
+		m_pCurrent = m_pBuffer;
+	}
+
+	~CSphBuffer ()
+	{
+		SafeDelete ( m_pBuffer );
+	}
+
+	const char * Ptr() const { return m_pBuffer; }
+
+	bool Finalize()
+	{
+		return !( m_bOverrun || m_iLeft != 0 || m_pCurrent - m_pBuffer != m_iSize );
+	}
+	
+	void SendBytes ( const void * pBytes, int iBytes );
+	
+	void SendWord ( short int v )					{ v = ntohs(v); SendBytes ( &v, sizeof(v) ); }
+	void SendInt ( int v )							{ v = ntohl(v); SendBytes ( &v, sizeof(v) ); }
+	void SendDword ( DWORD v )						{ v = ntohl(v) ;SendBytes ( &v, sizeof(v) ); }
+	void SendUint64 ( ulonglong v )					{ SendDword ( uint(v>>32) ); SendDword ( uint(v&0xFFFFFFFFUL) ); }
+	void SendString ( const char * v )				{ SendString ( v, strlen(v) ); }
+	void SendString ( const char * v, int iLen )	{ SendDword(iLen); SendBytes ( v, iLen ); }
+	void SendFloat ( float v )						{ SendDword ( sphF2DW(v) ); }
+};
+
+void CSphBuffer::SendBytes ( const void * pBytes, int iBytes )
+{
+	if ( m_iLeft < iBytes )
+	{
+		m_bOverrun = true;
+		return;
+	}
+
+	memcpy ( m_pCurrent, pBytes, iBytes );
+
+	m_pCurrent += iBytes;
+	m_iLeft -= iBytes;
+}
+
+struct CSphUrl
+{
+	char * m_sBuffer;
+	char * m_sFormatted;
+	
+	char * m_sScheme;
+	char * m_sHost;
+	char * m_sIndex;
+	
+	int m_iPort;
+	
+	CSphUrl()
+		: m_sBuffer ( NULL )
+		, m_sFormatted ( NULL )
+		, m_sScheme ( SPHINXSE_DEFAULT_SCHEME )
+		, m_sHost ( SPHINXSE_DEFAULT_HOST )
+		, m_sIndex ( SPHINXSE_DEFAULT_INDEX )
+		, m_iPort ( SPHINXSE_DEFAULT_PORT )
+	{}
+	
+	~CSphUrl()
+	{
+		SafeDeleteArray ( m_sFormatted );
+		SafeDeleteArray ( m_sBuffer );
+	}
+	
+	bool Parse ( const char * sUrl, int iLen );
+	int Connect();
+	const char * Format();
+};
+
+const char * CSphUrl::Format()
+{
+	if ( !m_sFormatted )
+	{
+		int iSize = 15 + strlen(m_sHost) + strlen(m_sIndex);
+		m_sFormatted = new char [ iSize ];
+		if ( m_iPort )
+			snprintf ( m_sFormatted, iSize, "inet://%s:%d/%s", m_sHost, m_iPort, m_sIndex );
+		else
+			snprintf ( m_sFormatted, iSize, "unix://%s/%s", m_sHost, m_sIndex );
+	}
+	return m_sFormatted;
+}
+
+// the following scheme variants are recognized
+//
+// inet://host/index
+// inet://host:port/index
+// unix://unix/domain/socket:index
+// unix://unix/domain/socket
+bool CSphUrl::Parse ( const char * sUrl, int iLen )
+{
+	bool bOk = true;
+	while ( iLen )
+	{
+		bOk = false;
+		
+		m_sBuffer = sphDup ( sUrl, iLen );
+		m_sScheme = m_sBuffer;
+		
+		m_sHost = strstr ( m_sBuffer, "://" );
+		if ( !m_sHost )
+			break;
+		m_sHost[0] = '\0';
+		m_sHost += 2;
+		
+		if ( !strcmp ( m_sScheme, "unix" ) )
+		{
+			// unix-domain socket
+			m_iPort = 0;
+			if (!( m_sIndex = strrchr ( m_sHost, ':' ) ))
+				m_sIndex = SPHINXSE_DEFAULT_INDEX;
+			else
+			{
+				*m_sIndex++ = '\0';
+				if ( !*m_sIndex )
+					m_sIndex = SPHINXSE_DEFAULT_INDEX;
+			}
+			bOk = true;
+			break;
+		}
+		if( strcmp ( m_sScheme, "sphinx" ) != 0 && strcmp ( m_sScheme, "inet" ) != 0 )
+			break;
+
+		// inet
+		m_sHost++;
+		char * sPort = strchr ( m_sHost, ':' );
+		if ( sPort )
+		{
+			*sPort++ = '\0';
+			if ( *sPort )
+			{
+				m_sIndex = strchr ( sPort, '/' );
+				if ( m_sIndex )
+					*m_sIndex++ = '\0'; 
+				else
+					m_sIndex = SPHINXSE_DEFAULT_INDEX;
+				
+				m_iPort = atoi(sPort);
+				if ( !m_iPort )
+					m_iPort = SPHINXSE_DEFAULT_PORT;
+			}
+		} else
+		{
+			m_sIndex = strchr ( m_sHost, '/' );
+			if ( m_sIndex )
+				*m_sIndex++ = '\0';
+			else
+				m_sIndex = SPHINXSE_DEFAULT_INDEX;
+		}
+
+		bOk = true;
+		break;
+	}
+	
+	return bOk;
+}
+
+int CSphUrl::Connect()
+{
+	struct sockaddr_in sin;
+#ifndef __WIN__
+	struct sockaddr_un saun;
+#endif
+
+	int iDomain = 0;
+	int iSockaddrSize = 0;
+	struct sockaddr * pSockaddr = NULL;
+
+	in_addr_t ip_addr;
+
+	if ( m_iPort )
+	{
+		iDomain = AF_INET;
+		iSockaddrSize = sizeof(sin);
+		pSockaddr = (struct sockaddr *) &sin;
+
+		memset ( &sin, 0, sizeof(sin) );
+		sin.sin_family = AF_INET;
+		sin.sin_port = htons(m_iPort);
+		
+		// resolve address
+		if ( (int)( ip_addr=inet_addr(m_sHost) ) != (int)INADDR_NONE )
+			memcpy ( &sin.sin_addr, &ip_addr, sizeof(ip_addr) );
+		else
+		{
+			int tmp_errno;
+			struct hostent tmp_hostent, *hp;
+			char buff2 [ GETHOSTBYNAME_BUFF_SIZE ];
+			
+			hp = my_gethostbyname_r ( m_sHost, &tmp_hostent,
+									  buff2, sizeof(buff2), &tmp_errno );
+			if ( !hp )
+			{ 
+				my_gethostbyname_r_free();
+				
+				char sError[256];
+				snprintf ( sError, sizeof(sError), "failed to resolve searchd host (name=%s)", m_sHost );
+				
+				my_error ( ER_CONNECT_TO_FOREIGN_DATA_SOURCE, MYF(0), sError );
+				return -1;
+			}
+			
+			memcpy ( &sin.sin_addr, hp->h_addr, Min ( sizeof(sin.sin_addr), (size_t)hp->h_length ) );
+			my_gethostbyname_r_free();
+		}
+	}
+	else
+	{
+#ifndef __WIN__
+		iDomain = AF_UNIX;
+		iSockaddrSize = sizeof(saun);
+		pSockaddr = (struct sockaddr *) &saun;
+
+		memset ( &saun, 0, sizeof(saun) );
+		saun.sun_family = AF_UNIX;
+		strncpy ( saun.sun_path, m_sHost, sizeof(saun.sun_path)-1 );
+#else
+		my_error ( ER_CONNECT_TO_FOREIGN_DATA_SOURCE, MYF(0), "Unix-domain sockets are not supported on Windows" );
+		return -1;
+#endif
+	}
+
+	// connect to searchd and exchange versions
+	uint uServerVersion;
+	uint uClientVersion = htonl ( SPHINX_SEARCHD_PROTO );
+	int iSocket = -1;
+	char * pError = NULL;
+	do
+	{
+		iSocket = socket ( iDomain, SOCK_STREAM, 0 );
+		if ( iSocket == -1 )
+		{
+			pError = "Failed to create client socket";
+			break;
+		}
+	
+		if ( connect ( iSocket, pSockaddr, iSockaddrSize ) == -1)
+		{
+			pError = "Failed to connect to searchd";
+			break;
+		}
+
+		if ( !sphRecv ( iSocket, (char *)&uServerVersion, sizeof(uServerVersion) ) )
+		{
+			pError = "Failed to receive searchd version";
+			break;
+		}
+		
+		if ( !sphSend ( iSocket, (char *)&uClientVersion, sizeof(uClientVersion) ) )
+		{
+			pError = "Failed to send client version";
+			break;
+		}
+	}
+	while(0);
+
+	// fixme: compare versions?
+
+	if ( pError )
+	{
+		char sError[1024];
+		snprintf ( sError, sizeof(sError), "%s [%d] %s", Format(), errno, strerror(errno) );
+		my_error ( ER_CONNECT_TO_FOREIGN_DATA_SOURCE, MYF(0), sError );
+
+		if ( iSocket != -1 )
+			close ( iSocket );
+		
+		return -1;
+	}
+
+	return iSocket;
+}
+
+struct CSphResponse
+{
+	char * m_pBuffer;
+	char * m_pBody;
+
+	CSphResponse ()
+		: m_pBuffer ( NULL )
+		, m_pBody ( NULL )
+	{}
+
+	CSphResponse ( DWORD uSize )
+		: m_pBody ( NULL )
+	{
+		m_pBuffer = new char[uSize];
+	}
+
+	~CSphResponse ()
+	{
+		SafeDeleteArray ( m_pBuffer );
+	}
+	
+	static CSphResponse * Read ( int iSocket, int iClientVersion );
+};
+
+CSphResponse *
+CSphResponse::Read ( int iSocket, int iClientVersion )
+{
+	char sHeader[8];
+	if ( !sphRecv ( iSocket, sHeader, sizeof(sHeader) ) )
+		return NULL;
+
+	int iStatus   = ntohs ( sphUnalignedRead ( *(short int *) &sHeader[0] ) );
+	int iVersion  = ntohs ( sphUnalignedRead ( *(short int *) &sHeader[2] ) );
+	DWORD uLength = ntohl ( sphUnalignedRead ( *(DWORD *)     &sHeader[4] ) );
+
+	if ( iVersion < iClientVersion ) // fixme: warn
+		;
+
+	if ( uLength <= SPHINXSE_MAX_ALLOC )
+	{
+		CSphResponse * pResponse = new CSphResponse ( uLength );
+		if ( !sphRecv ( iSocket, pResponse->m_pBuffer, uLength ) )
+		{
+			SafeDelete ( pResponse );
+			return NULL;
+		}
+
+		pResponse->m_pBody = pResponse->m_pBuffer;
+		if ( iStatus != SEARCHD_OK )
+		{
+			DWORD uSize = ntohl ( *(DWORD *)pResponse->m_pBuffer );
+			if ( iStatus == SEARCHD_WARNING )
+				pResponse->m_pBody += uSize; // fixme: report the warning somehow
+			else
+			{
+				char * sMessage = sphDup ( pResponse->m_pBuffer + sizeof(DWORD), uSize );
+				my_error ( ER_QUERY_ON_FOREIGN_DATA_SOURCE, MYF(0), sMessage );
+				SafeDelete ( sMessage );
+				SafeDelete ( pResponse );
+				return NULL;
+			}
+		}
+		return pResponse;
+	}
+	return NULL;
+}
+
+/// udf
+
+extern "C"
+{
+	my_bool sphinx_snippets_init ( UDF_INIT * pUDF, UDF_ARGS * pArgs, char * sMessage );
+	void sphinx_snippets_deinit ( UDF_INIT * pUDF );
+	char * sphinx_snippets ( UDF_INIT * pUDF, UDF_ARGS * pArgs, char * sResult, unsigned long * pLength, char * pIsNull, char * sError );
+};
+
+#define MAX_MESSAGE_LENGTH 255
+#define MAX_RESULT_LENGTH 255
+
+struct CSphSnippets
+{
+	CSphUrl m_tUrl;
+	CSphResponse * m_pResponse;
+
+	int m_iBeforeMatch;
+	int m_iAfterMatch;
+	int m_iChunkSeparator;
+	int m_iLimit;
+	int m_iAround;
+	int m_iFlags;
+
+	CSphSnippets()
+		: m_pResponse(NULL)
+		, m_iBeforeMatch(0)
+		, m_iAfterMatch(0)
+		, m_iChunkSeparator(0)
+		  // defaults
+		, m_iLimit(256)
+		, m_iAround(5)
+		, m_iFlags(1)
+	{
+	}
+
+	~CSphSnippets()
+	{
+		SafeDelete ( m_pResponse );
+	}
+};
+
+#define KEYWORD(NAME) else if ( strncmp ( NAME, pArgs->attributes[i], pArgs->attribute_lengths[i] ) == 0 )
+
+#define CHECK_TYPE(TYPE)											\
+	if ( pArgs->arg_type[i] != TYPE )								\
+	{																\
+		snprintf ( sMessage, MAX_MESSAGE_LENGTH,					\
+				   "%.*s argument must be a string",				\
+				   (int)pArgs->attribute_lengths[i],				\
+				   pArgs->attributes[i] );							\
+		bFail = true;												\
+		break;														\
+	}																\
+	if ( TYPE == STRING_RESULT && !pArgs->args[i] )					\
+	{																\
+		snprintf ( sMessage, MAX_MESSAGE_LENGTH,					\
+				   "%.*s argument must be constant (and not NULL)",	\
+				   (int)pArgs->attribute_lengths[i],				\
+				   pArgs->attributes[i] );							\
+		bFail = true;												\
+		break;														\
+	}
+
+#define STRING CHECK_TYPE(STRING_RESULT)
+#define INT CHECK_TYPE(INT_RESULT); int iValue = *(long long *)pArgs->args[i]
+
+my_bool sphinx_snippets_init ( UDF_INIT * pUDF, UDF_ARGS * pArgs, char * sMessage )
+{
+	if ( pArgs->arg_count < 3 )
+	{
+		strncpy ( sMessage, "insufficient arguments", MAX_MESSAGE_LENGTH );
+		return 1;
+	}
+
+	bool bFail = false;
+	CSphSnippets * pOpts = new CSphSnippets;
+	for ( uint i = 0; i < pArgs->arg_count; i++ )
+	{
+		if ( i < 3 )
+		{
+			if ( pArgs->arg_type[i] != STRING_RESULT )
+			{
+				strncpy ( sMessage, "first three arguments must be of string type", MAX_MESSAGE_LENGTH );
+				bFail = true;
+				break;
+			}
+		}
+		KEYWORD("sphinx")
+		{
+			STRING;
+			if ( !pOpts->m_tUrl.Parse ( pArgs->args[i], pArgs->lengths[i] ) )
+			{
+				strncpy ( sMessage, "failed to parse connection string", MAX_MESSAGE_LENGTH );
+				bFail = true;
+				break;
+			}
+		}
+		KEYWORD("before_match")		{ STRING; pOpts->m_iBeforeMatch = i; }
+		KEYWORD("after_match")		{ STRING; pOpts->m_iAfterMatch = i; }
+		KEYWORD("chunk_separator")	{ STRING; pOpts->m_iChunkSeparator = i; }
+		KEYWORD("limit")			{ INT; pOpts->m_iLimit = iValue; }
+		KEYWORD("around")			{ INT; pOpts->m_iAround = iValue; }
+		KEYWORD("exact_phrase")		{ INT; if ( iValue ) pOpts->m_iFlags |= 2; }
+		KEYWORD("single_passage")	{ INT; if ( iValue ) pOpts->m_iFlags |= 4; }
+		KEYWORD("use_boundaries")	{ INT; if ( iValue ) pOpts->m_iFlags |= 8; }
+		KEYWORD("weight_order")		{ INT; if ( iValue ) pOpts->m_iFlags |= 16; }
+		else
+		{
+			snprintf ( sMessage, MAX_MESSAGE_LENGTH, "unrecognized argument: %.*s",
+					   (int)pArgs->attribute_lengths[i], pArgs->attributes[i] );
+			bFail = true;
+			break;
+		}
+	}
+	
+	if ( bFail )
+	{
+		SafeDelete ( pOpts );
+		return 1;
+	}
+	pUDF->ptr = (char *)pOpts;
+	return 0;
+}
+
+#undef STRING
+#undef INT
+#undef KEYWORD
+#undef CHECK_TYPE
+
+#define ARG(i) pArgs->args[i], pArgs->lengths[i]
+#define ARG_LEN(VAR, LEN) ( VAR ? pArgs->lengths[VAR] : LEN )
+
+#define SEND_STRING(INDEX, DEFAULT)							\
+	if ( INDEX )											\
+		tBuffer.SendString ( ARG(INDEX) );					\
+	else													\
+		tBuffer.SendString ( DEFAULT, sizeof(DEFAULT) - 1 );
+
+
+char * sphinx_snippets ( UDF_INIT * pUDF, UDF_ARGS * pArgs, char * sResult, unsigned long * pLength, char * pIsNull, char * pError )
+{
+	CSphSnippets * pOpts = (CSphSnippets *)pUDF->ptr;
+	assert ( pOpts );
+
+	if ( !pArgs->args[0] || !pArgs->args[1] || !pArgs->args[2] )
+	{
+		*pIsNull = 1;
+		return sResult;
+	}
+
+	const int iSize =
+		8 + // header
+		8 +
+		4 + pArgs->lengths[1] + // index
+		4 + pArgs->lengths[2] + // words
+		4 + ARG_LEN ( pOpts->m_iBeforeMatch, 3 ) +
+		4 + ARG_LEN ( pOpts->m_iAfterMatch, 4 ) +
+		4 + ARG_LEN ( pOpts->m_iChunkSeparator, 5 ) +
+		12 +
+		4 + pArgs->lengths[0]; // document
+
+	CSphBuffer tBuffer(iSize);
+
+	tBuffer.SendWord ( SEARCHD_COMMAND_EXCERPT );
+	tBuffer.SendWord ( VER_COMMAND_EXCERPT );
+	tBuffer.SendDword ( iSize - 8 );
+
+	tBuffer.SendDword ( 0 );
+	tBuffer.SendDword ( pOpts->m_iFlags );
+
+	tBuffer.SendString ( ARG(1) ); // index
+	tBuffer.SendString ( ARG(2) ); // words
+
+	SEND_STRING ( pOpts->m_iBeforeMatch, "<b>" );
+	SEND_STRING ( pOpts->m_iAfterMatch, "</b>" );
+	SEND_STRING ( pOpts->m_iChunkSeparator, " ... " );
+
+	tBuffer.SendInt ( pOpts->m_iLimit );
+	tBuffer.SendInt ( pOpts->m_iAround );
+
+	// single document
+	tBuffer.SendInt ( 1 );
+	tBuffer.SendString ( ARG(0) );
+
+	int iSocket = -1;
+	do
+	{
+		if ( !tBuffer.Finalize() )
+		{
+			my_error ( ER_QUERY_ON_FOREIGN_DATA_SOURCE, MYF(0), "INTERNAL ERROR: failed to build request" );
+			break;
+		}
+		
+		iSocket = pOpts->m_tUrl.Connect();
+		if ( iSocket == -1 ) break;
+		if ( !sphSend ( iSocket, tBuffer.Ptr(), iSize, sphReportErrors ) ) break;
+
+		CSphResponse * pResponse = CSphResponse::Read ( iSocket, 0x100 );
+		if ( !pResponse ) break;
+
+		close ( iSocket );
+		pOpts->m_pResponse = pResponse;
+		*pLength = ntohl( *(DWORD *)pResponse->m_pBody );
+		return pResponse->m_pBody + sizeof(DWORD);
+	}
+	while(0);
+
+	if ( iSocket != -1 )
+		close ( iSocket );
+
+	*pError = 1;
+	return sResult;
+}
+
+#undef SEND_STRING
+#undef ARG_LEN	
+#undef ARG
+
+void sphinx_snippets_deinit ( UDF_INIT * pUDF )
+{
+	CSphSnippets * pOpts = (CSphSnippets *)pUDF->ptr;
+	SafeDelete ( pOpts );
+}
+
+//
+// $Id: snippets_udf.cc 2058 2009-11-07 04:01:57Z shodan $
+//