83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
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import re
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import magic
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import datetime
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import debug # pyflakes:ignore
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from django.conf import settings
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from django.template.defaultfilters import filesizeformat
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class MetaData(object):
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rev = None
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name = None
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group = None
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file_size = None
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first_two_pages = None
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pages = None
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submission_date = None
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document_date = None
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authors = None
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class ParseInfo(object):
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"""Collect errors from a parse"""
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def __init__(self):
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self.errors = []
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# warnings are currently unused by the parsers
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self.warnings = {}
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# the metadata fields are currently unused, i.e. the plain
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# text parser fills in some fields but they are not used
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# anywhere (instead the draft parser is used for .txt and the
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# other file types have no actual parsing at the moment)
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self.metadata = MetaData()
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def add_error(self, error_str):
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self.errors.append(error_str)
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def add_warning(self, warning_type, warning_str):
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warn_list = self.warnings.get(warning_type, [])
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self.warnings[warning_type] = warn_list + [warning_str]
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class FileParser(object):
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ext = None
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mimetype = None
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def __init__(self, fd):
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self.fd = fd
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self.parsed_info = ParseInfo()
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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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self.parse_invalid_chars_in_filename()
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self.parse_max_size();
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self.parse_filename_extension()
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self.parse_file_type()
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self.parsed_info.metadata.submission_date = datetime.date.today()
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return self.parsed_info
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def parse_invalid_chars_in_filename(self):
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name = self.fd.name
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regexp = re.compile(r'&|\|\/|;|\*|\s|\$')
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chars = regexp.findall(name)
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if chars:
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self.parsed_info.add_error('Invalid characters were found in the name of the file which was just submitted: %s' % ', '.join(set(chars)))
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def parse_max_size(self):
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max_size = settings.IDSUBMIT_MAX_DRAFT_SIZE[self.ext]
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if self.fd.size > max_size:
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self.parsed_info.add_error('File size is larger than the permitted maximum of %s' % filesizeformat(max_size))
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self.parsed_info.metadata.file_size = self.fd.size
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def parse_filename_extension(self):
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if not self.fd.name.lower().endswith('.'+self.ext):
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self.parsed_info.add_error('Expected the %s file to have extension ".%s", found the name "%s"' % (self.ext.upper(), self.ext, self.fd.name))
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def parse_file_type(self):
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self.fd.file.seek(0)
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content = self.fd.file.read(4096)
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mimetype = magic.from_buffer(content, mime=True)
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if not mimetype == self.mimetype:
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self.parsed_info.add_error('Expected an %s file of type "%s", found one of type "%s"' % (self.ext.upper(), self.mimetype, mimetype))
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