96 lines
2.9 KiB
Python
96 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
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# Relational
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# Copyright (C) 2008 Salvo "LtWorf" Tomaselli
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#
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# Relation is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# author Salvo "LtWorf" Tomaselli <tiposchi@tiscali.it>
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#
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# Stuff non-related to relational algebra, but used for maintenance.
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import httplib
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import urllib
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import relation
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def send_survey(data):
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'''Sends the survey. Data must be a dictionary.
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returns the http response'''
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post=''
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for i in data.keys():
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post+='%s: %s\n' %(i,data[i])
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#sends the string
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params = urllib.urlencode({'survey':post})
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headers = {"Content-type": "application/x-www-form-urlencoded","Accept": "text/plain"}
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connection = httplib.HTTPConnection('galileo.dmi.unict.it')
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connection.request("POST","/~ltworf/survey.php",params,headers)
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return connection.getresponse()
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def check_latest_version():
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'''Returns the latest version available.
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Heavely dependent on server and server configurations
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not granted to work forever.'''
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connection = httplib.HTTPConnection('galileo.dmi.unict.it')
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connection.request("GET","/svn/relational/tags/")
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r=connection.getresponse()
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#html
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s=r.read()
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if len(s)==0:
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return None
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l= s[s.find('<ul>')+4:s.find('</ul>')].split('\n')
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l.sort()
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a=l[len(l)-1]
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s=a.find('"')+1
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return a[s:a.find('"',s)-1]
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class interface (object):
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'''It is used to provide services to the user interfaces, in order to
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reduce the amount of duplicated code present in different user interfaces.
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'''
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def __init__(self):
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self.rels= {}
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def load(self,filename,name):
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'''Loads a relation from file, and gives it a name to
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be used in subsequent queries.'''
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pass
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def unload(self,name):
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'''Unloads an existing relation.'''
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pass
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def store(self,filename,name):
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'''Stores a relation to file.'''
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pass
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def get_relation(self,name):
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'''Returns the relation corresponding to name.'''
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pass
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def set_relation(self,name,rel):
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'''Sets the relation corresponding to name.'''
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pass
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def execute(self,query,relname='last_'):
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'''Executes a query, returns the result and if
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relname is not None, adds the result to the
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dictionary, with the name given in relname.'''
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pass
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