[Zope-Checkins] CVS: Zope3/lib/python/Zope/Publisher/Browser - BrowserCharsets.py:1.1

[Stephan Richter]

Update of /cvs-repository/Zope3/lib/python/Zope/Publisher/Browser
In directory cvs.zope.org:/tmp/cvs-serv23607/Zope/Publisher/Browser

Added Files:
	BrowserCharsets.py 
Log Message:
Similar to the Language Negotiator I created a Charset negotiator, which 
should help us with defining an output charset for the browser.


=== Added File Zope3/lib/python/Zope/Publisher/Browser/BrowserCharsets.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
# 
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
# 
##############################################################################
"""Retrieval of browser character set information.

$Id: BrowserCharsets.py,v 1.1 2002/06/14 08:56:29 srichter Exp $
"""

from Zope.I18n.IUserPreferredCharsets import IUserPreferredCharsets


class BrowserCharsets:

    __implements__ =  IUserPreferredCharsets

    def __init__(self, request):
        self.request = request

    ############################################################
    # Implementation methods for interface
    # Zope.I18n.IUserPreferredCharsets.

    def getPreferredCharsets(self):
        '''See interface IUserPreferredCharsets'''
        charsets = []
        for charset in self.request['HTTP_ACCEPT_CHARSET'].split(','):
            charset = charset.strip()
            if charset:
                if ';' in charset:
                    charset, quality = charset.split(';')
                    quality = float(quality[2:])
                else:
                    quality = 1.0
                charsets.append((quality, charset))
        charsets.sort()
        charsets.reverse()
        return map(lambda c: c[1], charsets)

    #
    ############################################################