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#!/bin/env python
#
# Source: dictlib.py
# Author: Tor Andersson <mazirian@dsek.lth.se>
# Date: 2000-03-24
# Version: 0.0.1 alpha
#
# ---------------------------------------------------------------------------
#
# Copyright (C) 2000 Tor Andersson
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# ---------------------------------------------------------------------------
#
# object fields:
# dict.error = string with last error message
# dict.banner = banner from dict server
#
# Throws DICTError when fatal error is encountered (50z and 4xy errors)
#
import string, socket
class DICT:
"""Implementation of DICT protocol as seen in RFC 2229"""
# ------------------------------------------------------------------
# private stuff
errors = {
'500': 'Syntax error, command not recognized',
'501': 'Syntax error, illegal parameters',
'502': 'Command not implemented',
'503': 'Command parameter not implemented',
'420': 'Server temporarily unavailable',
'421': 'Server shutting down at operator request',
}
# open session
def __init__(self, host, port=2628):
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.connect((host, port))
self.file = self.sock.makefile("r")
self.banner = self.rline('220')
# send command
def send(self, cmd):
self.sock.send(cmd)
self.sock.send("\r\n")
# check for fatal errors (server down, client protocol errors)...
def chk(self, resp):
if DICT.errors.has_key(resp[0:3]):
raise "DICTError", DICT.errors[resp[0:3]]
# receive text block
def rtext(self):
lines = []
while 1:
line = string.rstrip(self.file.readline())
if line == '.':
break
lines.append(line)
return lines
# receive one line, and check expected return code if specified
def rline(self, expected=''):
line = string.rstrip(self.file.readline())
self.chk(line)
if expected and line[0:3] != expected:
raise "DICTError", "Protocol mismatch..."
return line
# receive line + text block from show command
def rshow(self, code):
resp = self.rline()
if resp[0:3] != code:
self.error = resp
return None
text = self.rtext()
return text
# close session
def close(self):
self.file.close()
self.sock.close()
# ------------------------------------------------------------------
# public protocol stuff
def client(self, cli):
"Notifies server of which client is used. Return nothing"
self.send("CLIENT %s" % cli)
self.rline('250')
def define(self, db, word):
"Find definition. Return [ [match, [lines]], ... ]"
quotedword = string.replace(word, "'", "\\'")
self.send('DEFINE %s "%s"' % (db, quotedword))
resp = self.rline()
if resp[0:3] != '150':
self.error = resp
return None
ndefs = int(string.split(resp)[1])
defs = []
for n in range(ndefs):
match = self.rline('151')
text = self.rtext()
defs.append( (match, text) )
self.rline('250')
return defs
def match(self, db, strat, word):
"Find matches using strategy. Return [match, ...]"
quotedword = string.replace(word, "'", "\\'")
self.send('MATCH %s %s "%s"' % (db, strat, quotedword))
resp = self.rline()
if resp[0:3] != '152':
self.error = resp
return None
text = self.rtext()
self.rline('250')
return text
def show_db(self):
"Get list of databases"
self.send("SHOW DB")
text = self.rshow('110')
self.rline('250')
return text
def show_strat(self):
"Get list of strategies"
self.send("SHOW STAT")
text = self.rshow('111')
self.rline('250')
return text
def show_info(self, db):
"Get info about a database"
self.send("SHOW %s" % db)
text = self.rshow('112')
self.rline('250')
return text
def show_server(self):
"Get info about server"
self.send("SHOW SERVER" % db)
text = self.rshow('114')
self.rline('250')
return text
def status(self):
"Get server/connection status"
self.send("STATUS")
return self.rline('210')
def help(self):
"Get server help message"
self.send("HELP")
text = self.rshow('113')
self.rline('250')
return text
def quit(self):
"Quit connection and close socket"
self.send("QUIT")
self.rline('221')
self.close()
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