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121 lines
3.6 KiB
Python
121 lines
3.6 KiB
Python
# Copyright (C) 2006-2007, Red Hat, Inc.
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# Copyright (C) 2007, One Laptop Per Child
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library 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 GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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import logging
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from sugar import _sugarext
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def get_for_file(file_name):
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mime_type = _sugarext.get_mime_type_for_file(file_name)
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if mime_type == 'application/octet-stream':
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if _file_looks_like_text(file_name):
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return 'text/plain'
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else:
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return 'application/octet-stream'
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return mime_type
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def get_from_file_name(file_name):
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return _sugarext.get_mime_type_from_file_name(file_name)
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_extensions_cache = {}
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def get_primary_extension(mime_type):
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if _extensions_cache.has_key(mime_type):
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return _extensions_cache[mime_type]
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f = open('/etc/mime.types')
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while True:
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line = f.readline()
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if not line:
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break
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cols = line.replace('\t', ' ').split(' ')
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if mime_type == cols[0]:
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for col in cols[1:]:
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if col:
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col = col.replace('\n', '')
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_extensions_cache[mime_type] = col
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return col
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_extensions_cache[mime_type] = None
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return None
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def choose_most_significant(mime_types):
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logging.debug('Choosing between %r.' % mime_types)
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if not mime_types:
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return ''
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if 'text/uri-list' in mime_types:
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return 'text/uri-list'
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for mime_category in ['image/', 'application/']:
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for mime_type in mime_types:
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if mime_type.startswith(mime_category):
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# skip mozilla private types (second component starts with '_'
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# or ends with '-priv')
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if mime_type.split('/')[1].startswith('_') or \
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mime_type.split('/')[1].endswith('-priv'):
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continue
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# take out the specifier after ';' that mozilla likes to add
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mime_type = mime_type.split(';')[0]
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logging.debug('Choosed %r!' % mime_type)
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return mime_type
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if 'text/x-moz-url' in mime_types:
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logging.debug('Choosed text/x-moz-url!')
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return 'text/x-moz-url'
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if 'text/html' in mime_types:
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logging.debug('Choosed text/html!')
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return 'text/html'
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if 'text/plain' in mime_types:
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logging.debug('Choosed text/plain!')
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return 'text/plain'
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logging.debug('Returning first: %r.' % mime_types[0])
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return mime_types[0]
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def split_uri_list(uri_list):
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result = []
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splitted = uri_list.split('\n')
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for uri in splitted:
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result.append(uri.strip())
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return result
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def _file_looks_like_text(file_name):
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f = open(file_name, 'r')
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try:
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sample = f.read(256)
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finally:
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f.close()
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if '\000' in sample:
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return False
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for encoding in ('ascii', 'latin_1', 'utf_8', 'utf_16'):
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try:
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string = unicode(sample, encoding)
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return True
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except Exception, e:
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pass
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return False
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