X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/9b97d5a2faa6f56b439dcefe9c7bb23e0a84b39c..db833ba4517084f61a64907c6d15606e7c881edd:/apps/djangosphinx/apis/api275/__init__.py

diff --git a/apps/djangosphinx/apis/api275/__init__.py b/apps/djangosphinx/apis/api275/__init__.py
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+++ b/apps/djangosphinx/apis/api275/__init__.py
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+#
+# $Id: sphinxapi.py 1216 2008-03-14 23:25:39Z shodan $
+#
+# Python version of Sphinx searchd client (Python API)
+#
+# Copyright (c) 2006-2008, Andrew Aksyonoff
+# Copyright (c) 2006, Mike Osadnik
+# 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/
+#
+
+import sys
+import select
+import socket
+from struct import *
+
+
+# known searchd commands
+SEARCHD_COMMAND_SEARCH	= 0
+SEARCHD_COMMAND_EXCERPT	= 1
+SEARCHD_COMMAND_UPDATE	= 2
+SEARCHD_COMMAND_KEYWORDS= 3
+
+# current client-side command implementation versions
+VER_COMMAND_SEARCH		= 0x113
+VER_COMMAND_EXCERPT		= 0x100
+VER_COMMAND_UPDATE		= 0x101
+VER_COMMAND_KEYWORDS	= 0x100
+
+# known searchd status codes
+SEARCHD_OK				= 0
+SEARCHD_ERROR			= 1
+SEARCHD_RETRY			= 2
+SEARCHD_WARNING			= 3
+
+# known match modes
+SPH_MATCH_ALL			= 0
+SPH_MATCH_ANY			= 1
+SPH_MATCH_PHRASE		= 2
+SPH_MATCH_BOOLEAN		= 3
+SPH_MATCH_EXTENDED		= 4
+SPH_MATCH_FULLSCAN		= 5
+SPH_MATCH_EXTENDED2		= 6
+
+# known ranking modes (extended2 mode only)
+SPH_RANK_PROXIMITY_BM25	= 0 # default mode, phrase proximity major factor and BM25 minor one
+SPH_RANK_BM25			= 1 # statistical mode, BM25 ranking only (faster but worse quality)
+SPH_RANK_NONE			= 2 # no ranking, all matches get a weight of 1
+SPH_RANK_WORDCOUNT		= 3 # simple word-count weighting, rank is a weighted sum of per-field keyword occurence counts
+
+# known sort modes
+SPH_SORT_RELEVANCE		= 0
+SPH_SORT_ATTR_DESC		= 1
+SPH_SORT_ATTR_ASC		= 2
+SPH_SORT_TIME_SEGMENTS	= 3
+SPH_SORT_EXTENDED		= 4
+SPH_SORT_EXPR			= 5
+
+# known filter types
+SPH_FILTER_VALUES		= 0
+SPH_FILTER_RANGE		= 1
+SPH_FILTER_FLOATRANGE	= 2
+
+# known attribute types
+SPH_ATTR_NONE			= 0
+SPH_ATTR_INTEGER		= 1
+SPH_ATTR_TIMESTAMP		= 2
+SPH_ATTR_ORDINAL		= 3
+SPH_ATTR_BOOL			= 4
+SPH_ATTR_FLOAT			= 5
+SPH_ATTR_MULTI			= 0X40000000L
+
+# known grouping functions
+SPH_GROUPBY_DAY	 		= 0
+SPH_GROUPBY_WEEK		= 1
+SPH_GROUPBY_MONTH		= 2
+SPH_GROUPBY_YEAR		= 3
+SPH_GROUPBY_ATTR		= 4
+
+
+class SphinxClient:
+	def __init__ (self):
+		"""
+		Create a new client object, and fill defaults.
+		"""
+		self._host			= 'localhost'					# searchd host (default is "localhost")
+		self._port			= 3312							# searchd port (default is 3312)
+		self._offset		= 0								# how much records to seek from result-set start (default is 0)
+		self._limit			= 20							# how much records to return from result-set starting at offset (default is 20)
+		self._mode			= SPH_MATCH_ALL					# query matching mode (default is SPH_MATCH_ALL)
+		self._weights		= []							# per-field weights (default is 1 for all fields)
+		self._sort			= SPH_SORT_RELEVANCE			# match sorting mode (default is SPH_SORT_RELEVANCE)
+		self._sortby		= ''							# attribute to sort by (defualt is "")
+		self._min_id		= 0								# min ID to match (default is 0)
+		self._max_id		= 0xFFFFFFFF					# max ID to match (default is UINT_MAX)
+		self._filters		= []							# search filters
+		self._groupby		= ''							# group-by attribute name
+		self._groupfunc		= SPH_GROUPBY_DAY				# group-by function (to pre-process group-by attribute value with)
+		self._groupsort		= '@group desc'					# group-by sorting clause (to sort groups in result set with)
+		self._groupdistinct	= ''							# group-by count-distinct attribute
+		self._maxmatches	= 1000							# max matches to retrieve
+		self._cutoff		= 0								# cutoff to stop searching at
+		self._retrycount	= 0								# distributed retry count
+		self._retrydelay	= 0								# distributed retry delay
+		self._anchor		= {}							# geographical anchor point
+		self._indexweights	= {}							# per-index weights
+		self._ranker		= SPH_RANK_PROXIMITY_BM25		# ranking mode
+		self._maxquerytime	= 0								# max query time, milliseconds (default is 0, do not limit)
+		self._fieldweights	= {}							# per-field-name weights
+		self._error			= ''							# last error message
+		self._warning		= ''							# last warning message
+		self._reqs			= []							# requests array for multi-query
+		return
+
+
+	def GetLastError (self):
+		"""
+		Get last error message (string).
+		"""
+		return self._error
+
+
+	def GetLastWarning (self):
+		"""
+		Get last warning message (string).
+		"""
+		return self._warning
+
+
+	def SetServer (self, host, port):
+		"""
+		Set searchd server host and port.
+		"""
+		assert(isinstance(host, str))
+		assert(isinstance(port, int))
+		self._host = host
+		self._port = port
+
+
+	def _Connect (self):
+		"""
+		INTERNAL METHOD, DO NOT CALL. Connects to searchd server.
+		"""
+		try:
+			sock = socket.socket ( socket.AF_INET, socket.SOCK_STREAM )
+			sock.connect ( ( self._host, self._port ) )
+		except socket.error, msg:
+			if sock:
+				sock.close()
+			self._error = 'connection to %s:%s failed (%s)' % ( self._host, self._port, msg )
+			return 0
+
+		v = unpack('>L', sock.recv(4))
+		if v<1:
+			sock.close()
+			self._error = 'expected searchd protocol version, got %s' % v
+			return 0
+
+		# all ok, send my version
+		sock.send(pack('>L', 1))
+		return sock
+
+
+	def _GetResponse (self, sock, client_ver):
+		"""
+		INTERNAL METHOD, DO NOT CALL. Gets and checks response packet from searchd server.
+		"""
+		(status, ver, length) = unpack('>2HL', sock.recv(8))
+		response = ''
+		left = length
+		while left>0:
+			chunk = sock.recv(left)
+			if chunk:
+				response += chunk
+				left -= len(chunk)
+			else:
+				break
+
+		sock.close()
+
+		# check response
+		read = len(response)
+		if not response or read!=length:
+			if length:
+				self._error = 'failed to read searchd response (status=%s, ver=%s, len=%s, read=%s)' \
+					% (status, ver, length, read)
+			else:
+				self._error = 'received zero-sized searchd response'
+			return None
+
+		# check status
+		if status==SEARCHD_WARNING:
+			wend = 4 + unpack ( '>L', response[0:4] )[0]
+			self._warning = response[4:wend]
+			return response[wend:]
+
+		if status==SEARCHD_ERROR:
+			self._error = 'searchd error: '+response[4:]
+			return None
+
+		if status==SEARCHD_RETRY:
+			self._error = 'temporary searchd error: '+response[4:]
+			return None
+
+		if status!=SEARCHD_OK:
+			self._error = 'unknown status code %d' % status
+			return None
+
+		# check version
+		if ver<client_ver:
+			self._warning = 'searchd command v.%d.%d older than client\'s v.%d.%d, some options might not work' \
+				% (ver>>8, ver&0xff, client_ver>>8, client_ver&0xff)
+
+		return response
+
+
+	def SetLimits (self, offset, limit, maxmatches=0, cutoff=0):
+		"""
+		Set offset and count into result set, and optionally set max-matches and cutoff limits.
+		"""
+		assert(isinstance(offset, int) and offset>=0)
+		assert(isinstance(limit, int) and limit>0)
+		assert(maxmatches>=0)
+		self._offset = offset
+		self._limit = limit
+		if maxmatches>0:
+			self._maxmatches = maxmatches
+		if cutoff>=0:
+			self._cutoff = cutoff
+
+
+	def SetMaxQueryTime (self, maxquerytime):
+		"""
+		Set maximum query time, in milliseconds, per-index. 0 means 'do not limit'.
+		"""
+		assert(isinstance(maxquerytime,int) and maxquerytime>0)
+		self._maxquerytime = maxquerytime
+
+
+	def SetMatchMode (self, mode):
+		"""
+		Set matching mode.
+		"""
+		assert(mode in [SPH_MATCH_ALL, SPH_MATCH_ANY, SPH_MATCH_PHRASE, SPH_MATCH_BOOLEAN, SPH_MATCH_EXTENDED, SPH_MATCH_FULLSCAN, SPH_MATCH_EXTENDED2])
+		self._mode = mode
+
+
+	def SetRankingMode (self, ranker):
+		"""
+		Set ranking mode.
+		"""
+		assert(ranker in [SPH_RANK_PROXIMITY_BM25, SPH_RANK_BM25, SPH_RANK_NONE, SPH_RANK_WORDCOUNT])
+		self._ranker = ranker
+
+
+	def SetSortMode ( self, mode, clause='' ):
+		"""
+		Set sorting mode.
+		"""
+		assert ( mode in [SPH_SORT_RELEVANCE, SPH_SORT_ATTR_DESC, SPH_SORT_ATTR_ASC, SPH_SORT_TIME_SEGMENTS, SPH_SORT_EXTENDED, SPH_SORT_EXPR] )
+		assert ( isinstance ( clause, str ) )
+		self._sort = mode
+		self._sortby = clause
+
+
+	def SetWeights (self, weights): 
+		"""
+		Set per-field weights.
+		WARNING, DEPRECATED; do not use it! use SetFieldWeights() instead
+		"""
+		assert(isinstance(weights, list))
+		for w in weights:
+			assert(isinstance(w, int))
+		self._weights = weights
+
+
+	def SetFieldWeights (self, weights):
+		"""
+		Bind per-field weights by name; expects (name,field_weight) dictionary as argument.
+		"""
+		assert(isinstance(weights,dict))
+		for key,val in weights.items():
+			assert(isinstance(key,str))
+			assert(isinstance(val,int))
+		self._fieldweights = weights
+
+
+	def SetIndexWeights (self, weights):
+		"""
+		Bind per-index weights by name; expects (name,index_weight) dictionary as argument.
+		"""
+		assert(isinstance(weights,dict))
+		for key,val in weights.items():
+			assert(isinstance(key,str))
+			assert(isinstance(val,int))
+		self._indexweights = weights
+
+
+	def SetIDRange (self, minid, maxid):
+		"""
+		Set IDs range to match.
+		Only match records if document ID is beetwen $min and $max (inclusive).
+		"""
+		assert(isinstance(minid, int))
+		assert(isinstance(maxid, int))
+		assert(minid<=maxid)
+		self._min_id = minid
+		self._max_id = maxid
+
+
+	def SetFilter ( self, attribute, values, exclude=0 ):
+		"""
+		Set values set filter.
+		Only match records where 'attribute' value is in given 'values' set.
+		"""
+		assert(isinstance(attribute, str))
+		assert(isinstance(values, list))
+		assert(values)
+
+		for value in values:
+			assert(isinstance(value, int))
+
+		self._filters.append ( { 'type':SPH_FILTER_VALUES, 'attr':attribute, 'exclude':exclude, 'values':values } )
+
+
+	def SetFilterRange (self, attribute, min_, max_, exclude=0 ):
+		"""
+		Set range filter.
+		Only match records if 'attribute' value is beetwen 'min_' and 'max_' (inclusive).
+		"""
+		assert(isinstance(attribute, str))
+		assert(isinstance(min_, int))
+		assert(isinstance(max_, int))
+		assert(min_<=max_)
+
+		self._filters.append ( { 'type':SPH_FILTER_RANGE, 'attr':attribute, 'exclude':exclude, 'min':min_, 'max':max_ } )
+
+
+	def SetFilterFloatRange (self, attribute, min_, max_, exclude=0 ):
+		assert(isinstance(attribute,str))
+		assert(isinstance(min_,float))
+		assert(isinstance(max_,float))
+		assert(min_ <= max_)
+		self._filters.append ( {'type':SPH_FILTER_FLOATRANGE, 'attr':attribute, 'exclude':exclude, 'min':min_, 'max':max_} ) 
+
+
+	def SetGeoAnchor (self, attrlat, attrlong, latitude, longitude):
+		assert(isinstance(attrlat,str))
+		assert(isinstance(attrlong,str))
+		assert(isinstance(latitude,float))
+		assert(isinstance(longitude,float))
+		self._anchor['attrlat'] = attrlat
+		self._anchor['attrlong'] = attrlong
+		self._anchor['lat'] = latitude
+		self._anchor['long'] = longitude
+
+
+	def SetGroupBy ( self, attribute, func, groupsort='@group desc' ):
+		"""
+		Set grouping attribute and function.
+		"""
+		assert(isinstance(attribute, str))
+		assert(func in [SPH_GROUPBY_DAY, SPH_GROUPBY_WEEK, SPH_GROUPBY_MONTH, SPH_GROUPBY_YEAR, SPH_GROUPBY_ATTR] )
+		assert(isinstance(groupsort, str))
+
+		self._groupby = attribute
+		self._groupfunc = func
+		self._groupsort = groupsort
+
+
+	def SetGroupDistinct (self, attribute):
+		assert(isinstance(attribute,str))
+		self._groupdistinct = attribute
+
+
+	def SetRetries (self, count, delay=0):
+		assert(isinstance(count,int) and count>=0)
+		assert(isinstance(delay,int) and delay>=0)
+		self._retrycount = count
+		self._retrydelay = delay
+
+
+	def ResetFilters (self):
+		"""
+		Clear all filters (for multi-queries).
+		"""
+		self._filters = []
+		self._anchor = {}
+
+
+	def ResetGroupBy (self):
+		"""
+		Clear groupby settings (for multi-queries).
+		"""
+		self._groupby = ''
+		self._groupfunc = SPH_GROUPBY_DAY
+		self._groupsort = '@group desc'
+		self._groupdistinct = ''
+
+
+	def Query (self, query, index='*', comment=''):
+		"""
+		Connect to searchd server and run given search query.
+		Returns None on failure; result set hash on success (see documentation for details).
+		"""
+		assert(len(self._reqs)==0)
+		self.AddQuery(query,index,comment)
+		results = self.RunQueries()
+
+		if not results or len(results)==0:
+			return None
+		self._error = results[0]['error']
+		self._warning = results[0]['warning']
+		if results[0]['status'] == SEARCHD_ERROR:
+			return None
+		return results[0]
+
+
+	def AddQuery (self, query, index='*', comment=''):
+		"""
+		Add query to batch.
+		"""
+		# build request
+		req = [pack('>5L', self._offset, self._limit, self._mode, self._ranker, self._sort)]
+		req.append(pack('>L', len(self._sortby)))
+		req.append(self._sortby)
+
+		if isinstance(query,unicode):
+			query = query.encode('utf-8')
+		assert(isinstance(query,str))
+
+		req.append(pack('>L', len(query)))
+		req.append(query)
+
+		req.append(pack('>L', len(self._weights)))
+		for w in self._weights:
+			req.append(pack('>L', w))
+		req.append(pack('>L', len(index)))
+		req.append(index)
+		req.append(pack('>L',0)) # id64 range marker FIXME! IMPLEMENT!
+		req.append(pack('>L', self._min_id))
+		req.append(pack('>L', self._max_id))
+		
+		# filters
+		req.append ( pack ( '>L', len(self._filters) ) )
+		for f in self._filters:
+			req.append ( pack ( '>L', len(f['attr'])) + f['attr'])
+			filtertype = f['type']
+			req.append ( pack ( '>L', filtertype))
+			if filtertype == SPH_FILTER_VALUES:
+				req.append ( pack ('>L', len(f['values'])))
+				for val in f['values']:
+					req.append ( pack ('>L', val))
+			elif filtertype == SPH_FILTER_RANGE:
+				req.append ( pack ('>2L', f['min'], f['max']))
+			elif filtertype == SPH_FILTER_FLOATRANGE:
+				req.append ( pack ('>2f', f['min'], f['max']))
+			req.append ( pack ( '>L', f['exclude'] ) )
+
+		# group-by, max-matches, group-sort
+		req.append ( pack ( '>2L', self._groupfunc, len(self._groupby) ) )
+		req.append ( self._groupby )
+		req.append ( pack ( '>2L', self._maxmatches, len(self._groupsort) ) )
+		req.append ( self._groupsort )
+		req.append ( pack ( '>LLL', self._cutoff, self._retrycount, self._retrydelay)) 
+		req.append ( pack ( '>L', len(self._groupdistinct)))
+		req.append ( self._groupdistinct)
+
+		# anchor point
+		if len(self._anchor) == 0:
+			req.append ( pack ('>L', 0))
+		else:
+			attrlat, attrlong = self._anchor['attrlat'], self._anchor['attrlong']
+			latitude, longitude = self._anchor['lat'], self._anchor['long']
+			req.append ( pack ('>L', 1))
+			req.append ( pack ('>L', len(attrlat)) + attrlat)
+			req.append ( pack ('>L', len(attrlong)) + attrlong)
+			req.append ( pack ('>f', latitude) + pack ('>f', longitude))
+
+		# per-index weights
+		req.append ( pack ('>L',len(self._indexweights)))
+		for indx,weight in self._indexweights.items():
+			req.append ( pack ('>L',len(indx)) + indx + pack ('>L',weight))
+
+		# max query time
+		req.append ( pack ('>L', self._maxquerytime) ) 
+
+		# per-field weights
+		req.append ( pack ('>L',len(self._fieldweights) ) )
+		for field,weight in self._fieldweights.items():
+			req.append ( pack ('>L',len(field)) + field + pack ('>L',weight) )
+
+		# comment
+		req.append ( pack('>L',len(comment)) + comment )
+
+		# send query, get response
+		req = ''.join(req)
+
+		self._reqs.append(req)
+		return
+
+
+	def RunQueries (self):
+		"""
+		Run queries batch.
+		Returns None on network IO failure; or an array of result set hashes on success.
+		"""
+		if len(self._reqs)==0:
+			self._error = 'no queries defined, issue AddQuery() first'
+			return None
+
+		sock = self._Connect()
+		if not sock:
+			return None
+
+		req = ''.join(self._reqs)
+		length = len(req)+4
+		req = pack('>HHLL', SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, length, len(self._reqs))+req
+		sock.send(req)
+
+		response = self._GetResponse(sock, VER_COMMAND_SEARCH)
+		if not response:
+			return None
+
+		nreqs = len(self._reqs)
+
+		# parse response
+		max_ = len(response)
+		p = 0
+
+		results = []
+		for i in range(0,nreqs,1):
+			result = {}
+			result['error'] = ''
+			result['warning'] = ''
+			status = unpack('>L', response[p:p+4])[0]
+			p += 4
+			result['status'] = status
+			if status != SEARCHD_OK:
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				message = response[p:p+length]
+				p += length
+
+				if status == SEARCHD_WARNING:
+					result['warning'] = message
+				else:
+					result['error'] = message
+					continue
+
+			# read schema
+			fields = []
+			attrs = []
+
+			nfields = unpack('>L', response[p:p+4])[0]
+			p += 4
+			while nfields>0 and p<max_:
+				nfields -= 1
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				fields.append(response[p:p+length])
+				p += length
+
+			result['fields'] = fields
+
+			nattrs = unpack('>L', response[p:p+4])[0]
+			p += 4
+			while nattrs>0 and p<max_:
+				nattrs -= 1
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				attr = response[p:p+length]
+				p += length
+				type_ = unpack('>L', response[p:p+4])[0]
+				p += 4
+				attrs.append([attr,type_])
+
+			result['attrs'] = attrs
+
+			# read match count
+			count = unpack('>L', response[p:p+4])[0]
+			p += 4
+			id64 = unpack('>L', response[p:p+4])[0]
+			p += 4
+		
+			# read matches
+			result['matches'] = []
+			while count>0 and p<max_:
+				count -= 1
+				if id64:
+					dochi, doc, weight = unpack('>3L', response[p:p+12])
+					doc += (dochi<<32)
+					p += 12
+				else:
+					doc, weight = unpack('>2L', response[p:p+8])
+					p += 8
+
+				match = { 'id':doc, 'weight':weight, 'attrs':{} }
+				for i in range(len(attrs)):
+					if attrs[i][1] == SPH_ATTR_FLOAT:
+						match['attrs'][attrs[i][0]] = unpack('>f', response[p:p+4])[0]
+					elif attrs[i][1] == (SPH_ATTR_MULTI | SPH_ATTR_INTEGER):
+						match['attrs'][attrs[i][0]] = []
+						nvals = unpack('>L', response[p:p+4])[0]
+						p += 4
+						for n in range(0,nvals,1):
+							match['attrs'][attrs[i][0]].append(unpack('>L', response[p:p+4])[0])
+							p += 4
+						p -= 4
+					else:
+						match['attrs'][attrs[i][0]] = unpack('>L', response[p:p+4])[0]
+					p += 4
+
+				result['matches'].append ( match )
+
+			result['total'], result['total_found'], result['time'], words = unpack('>4L', response[p:p+16])
+
+			result['time'] = '%.3f' % (result['time']/1000.0)
+			p += 16
+
+			result['words'] = []
+			while words>0:
+				words -= 1
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				word = response[p:p+length]
+				p += length
+				docs, hits = unpack('>2L', response[p:p+8])
+				p += 8
+
+				result['words'].append({'word':word, 'docs':docs, 'hits':hits})
+
+			results.append(result)
+
+		self._reqs = []
+		sock.close()
+		return results
+	
+
+	def BuildExcerpts (self, docs, index, words, opts=None):
+		"""
+		Connect to searchd server and generate exceprts from given documents.
+		"""
+		if not opts:
+			opts = {}
+		if isinstance(words,unicode):
+			words = words.encode('utf-8')
+
+		assert(isinstance(docs, list))
+		assert(isinstance(index, str))
+		assert(isinstance(words, str))
+		assert(isinstance(opts, dict))
+
+		sock = self._Connect()
+
+		if not sock:
+			return None
+
+		# fixup options
+		opts.setdefault('before_match', '<b>')
+		opts.setdefault('after_match', '</b>')
+		opts.setdefault('chunk_separator', ' ... ')
+		opts.setdefault('limit', 256)
+		opts.setdefault('around', 5)
+
+		# build request
+		# v.1.0 req
+
+		# mode=0, flags=1 (remove spaces)
+		req = [pack('>2L', 0, 1)]
+
+		# req index
+		req.append(pack('>L', len(index)))
+		req.append(index)
+
+		# req words
+		req.append(pack('>L', len(words)))
+		req.append(words)
+
+		# options
+		req.append(pack('>L', len(opts['before_match'])))
+		req.append(opts['before_match'])
+
+		req.append(pack('>L', len(opts['after_match'])))
+		req.append(opts['after_match'])
+
+		req.append(pack('>L', len(opts['chunk_separator'])))
+		req.append(opts['chunk_separator'])
+
+		req.append(pack('>L', int(opts['limit'])))
+		req.append(pack('>L', int(opts['around'])))
+
+		# documents
+		req.append(pack('>L', len(docs)))
+		for doc in docs:
+			if isinstance(doc,unicode):
+				doc = doc.encode('utf-8')
+			assert(isinstance(doc, str))
+			req.append(pack('>L', len(doc)))
+			req.append(doc)
+
+		req = ''.join(req)
+
+		# send query, get response
+		length = len(req)
+
+		# add header
+		req = pack('>2HL', SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, length)+req
+		wrote = sock.send(req)
+
+		response = self._GetResponse(sock, VER_COMMAND_EXCERPT )
+		if not response:
+			return []
+
+		# parse response
+		pos = 0
+		res = []
+		rlen = len(response)
+
+		for i in range(len(docs)):
+			length = unpack('>L', response[pos:pos+4])[0]
+			pos += 4
+
+			if pos+length > rlen:
+				self._error = 'incomplete reply'
+				return []
+
+			res.append(response[pos:pos+length])
+			pos += length
+
+		return res
+
+
+	def UpdateAttributes ( self, index, attrs, values ):
+		"""
+		Update given attribute values on given documents in given indexes.
+		Returns amount of updated documents (0 or more) on success, or -1 on failure.
+
+		'attrs' must be a list of strings.
+		'values' must be a dict with int key (document ID) and list of int values (new attribute values).
+
+		Example:
+			res = cl.UpdateAttributes ( 'test1', [ 'group_id', 'date_added' ], { 2:[123,1000000000], 4:[456,1234567890] } )
+		"""
+		assert ( isinstance ( index, str ) )
+		assert ( isinstance ( attrs, list ) )
+		assert ( isinstance ( values, dict ) )
+		for attr in attrs:
+			assert ( isinstance ( attr, str ) )
+		for docid, entry in values.items():
+			assert ( isinstance ( docid, int ) )
+			assert ( isinstance ( entry, list ) )
+			assert ( len(attrs)==len(entry) )
+			for val in entry:
+				assert ( isinstance ( val, int ) )
+
+		# build request
+		req = [ pack('>L',len(index)), index ]
+
+		req.append ( pack('>L',len(attrs)) )
+		for attr in attrs:
+			req.append ( pack('>L',len(attr)) + attr )
+
+		req.append ( pack('>L',len(values)) )
+		for docid, entry in values.items():
+			req.append ( pack('>q',docid) )
+			for val in entry:
+				req.append ( pack('>L',val) )
+
+		# connect, send query, get response
+		sock = self._Connect()
+		if not sock:
+			return None
+
+		req = ''.join(req)
+		length = len(req)
+		req = pack ( '>2HL', SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, length ) + req
+		wrote = sock.send ( req )
+
+		response = self._GetResponse ( sock, VER_COMMAND_UPDATE )
+		if not response:
+			return -1
+
+		# parse response
+		updated = unpack ( '>L', response[0:4] )[0]
+		return updated
+
+
+	def BuildKeywords ( self, query, index, hits ):
+		"""
+		Connect to searchd server, and generate keywords list for a given query.
+		Returns None on failure, or a list of keywords on success.
+		"""
+		assert ( isinstance ( query, str ) )
+		assert ( isinstance ( index, str ) )
+		assert ( isinstance ( hits, int ) )
+
+		# build request
+		req = [ pack ( '>L', len(query) ) + query ]
+		req.append ( pack ( '>L', len(index) ) + index )
+		req.append ( pack ( '>L', hits ) )
+
+		# connect, send query, get response
+		sock = self._Connect()
+		if not sock:
+			return None
+
+		req = ''.join(req)
+		length = len(req)
+		req = pack ( '>2HL', SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, length ) + req
+		wrote = sock.send ( req )
+
+		response = self._GetResponse ( sock, VER_COMMAND_KEYWORDS )
+		if not response:
+			return None
+
+		# parse response
+		res = []
+
+		nwords = unpack ( '>L', response[0:4] )[0]
+		p = 4
+		max_ = len(response)
+
+		while nwords>0 and p<max_:
+			nwords -= 1
+
+			length = unpack ( '>L', response[p:p+4] )[0]
+			p += 4
+			tokenized = response[p:p+length]
+			p += length
+
+			length = unpack ( '>L', response[p:p+4] )[0]
+			p += 4
+			normalized = response[p:p+length]
+			p += length
+
+			entry = { 'tokenized':tokenized, 'normalized':normalized }
+			if hits:
+				entry['docs'], entry['hits'] = unpack ( '>2L', response[p:p+8] )
+				p += 8
+
+			res.append ( entry )
+
+		if nwords>0 or p>max_:
+			self._error = 'incomplete reply'
+			return None
+
+		return res
+#
+# $Id: sphinxapi.py 1216 2008-03-14 23:25:39Z shodan $
+#
\ No newline at end of file