#VERSION: 1.0

# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#    * Redistributions of source code must retain the above copyright notice,
#      this list of conditions and the following disclaimer.
#    * Redistributions in binary form must reproduce the above copyright
#      notice, this list of conditions and the following disclaimer in the
#      documentation and/or other materials provided with the distribution.
#    * Neither the name of the author nor the names of its contributors may be
#      used to endorse or promote products derived from this software without
#      specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

import re, htmlentitydefs
import urllib2

def htmlentitydecode(s):
    # First convert alpha entities (such as é)
    # (Inspired from http://mail.python.org/pipermail/python-list/2007-June/443813.html)
    def entity2char(m):
        entity = m.group(1)
        if entity in htmlentitydefs.name2codepoint:
            return unichr(htmlentitydefs.name2codepoint[entity])
        return u" "  # Unknown entity: We replace with a space.
    t = re.sub(u'&(%s);' % u'|'.join(htmlentitydefs.name2codepoint), entity2char, s)
  
    # Then convert numerical entities (such as é)
    t = re.sub(u'&#(\d+);', lambda x: unichr(int(x.group(1))), t)
   
    # Then convert hexa entities (such as é)
    return re.sub(u'&#x(\w+);', lambda x: unichr(int(x.group(1),16)), t)
    
def retrieve_url(url):
    """ Return the content of the url page as a string """
    req = urllib2.Request(url)
    response = urllib2.urlopen(req)
    dat = response.read()
    info = response.info()
    charset = 'utf-8'
    try:
        ignore, charset = info['Content-Type'].split('charset=')
    except:
        pass
    dat = dat.decode(charset)
    dat = htmlentitydecode(dat)
    return dat.encode('utf-8', 'replace')