73 lines
3.2 KiB
Python
73 lines
3.2 KiB
Python
# Copyright The IETF Trust 2011-2020, All Rights Reserved
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import re
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import debug # pyflakes:ignore
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from ietf.submit.parsers.base import FileParser
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class PlainParser(FileParser):
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ext = 'txt'
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mimetypes = ['text/plain', ]
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def __init__(self, fd):
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super(PlainParser, self).__init__(fd)
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# If some error is found after this method invocation
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# no other file parsing is recommended
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def critical_parse(self):
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super(PlainParser, self).critical_parse()
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self.check_file_charset()
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self.parse_name()
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return self.parsed_info
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def check_file_charset(self):
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charset = self.parsed_info.charset
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if not charset in ['us-ascii', 'utf-8',]:
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self.parsed_info.add_error('A plain text ASCII document is required. '
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'Found an unexpected encoding: "%s". '
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'You probably have one or more non-ascii characters in your file.' % charset
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)
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if self.fd.charset and charset != self.fd.charset:
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self.parsed_info.add_error("Unexpected charset mismatch: upload: %s, libmagic: %s" % (self.fd.charset, charset))
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def parse_name(self):
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self.fd.file.seek(0)
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draftre = re.compile(r'(draft-\S+)')
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revisionre = re.compile(r'.*-(\d+)$')
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limit = 80
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if self.parsed_info.charset in ['us-ascii', 'utf-8']:
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while limit:
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limit -= 1
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try:
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line = self.fd.readline().decode(self.parsed_info.charset)
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except UnicodeDecodeError:
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return
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match = draftre.search(line)
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if not match:
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continue
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name = match.group(1)
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name = re.sub(r'^[^\w]+', '', name)
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name = re.sub(r'[^\w]+$', '', name)
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name = re.sub(r'\.txt$', '', name)
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extra_chars = re.sub(r'[0-9a-z\-]', '', name)
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if extra_chars:
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if len(extra_chars) == 1:
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self.parsed_info.add_error(('The document name on the first page, "%s", contains a disallowed character with byte code: %s ' % (name, ord(extra_chars[0]))) +
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'(see https://www.ietf.org/id-info/guidelines.html#naming for details).')
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else:
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self.parsed_info.add_error(('The document name on the first page, "%s", contains disallowed characters with byte codes: %s ' % (name, (', '.join([ str(ord(c)) for c in extra_chars] )))) +
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'(see https://www.ietf.org/id-info/guidelines.html#naming for details).')
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match_revision = revisionre.match(name)
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if match_revision:
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self.parsed_info.metadata.rev = match_revision.group(1)
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else:
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self.parsed_info.add_error('The name found on the first page of the document does not contain a revision: "%s"' % (name,))
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name = re.sub(r'-\d+$', '', name)
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self.parsed_info.metadata.name = name
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return
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self.parsed_info.add_error('The first page of the document does not contain a legitimate name that starts with draft-*')
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