+# -*- coding: utf-8 -*-
+#
+# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+from __future__ import print_function, unicode_literals
+
+import os
+import re
+import shutil
+from tempfile import NamedTemporaryFile
+import urllib
+from lxml import etree
+import six
+from six.moves.urllib.request import FancyURLopener
+from .util import makedirs
+
+
+@six.python_2_unicode_compatible
+class UnicodeException(Exception):
+ def __str__(self):
+ """ Dirty workaround for Python Unicode handling problems. """
+ args = self.args[0] if len(self.args) == 1 else self.args
+ try:
+ message = six.text_type(args)
+ except UnicodeDecodeError:
+ message = six.text_type(args, encoding='utf-8', errors='ignore')
+ return message
+
+class ParseError(UnicodeException):
+ pass
+
+class ValidationError(UnicodeException):
+ pass
+
+class NoDublinCore(ValidationError):
+ """There's no DublinCore section, and it's required."""
+ pass
+
+class NoProvider(UnicodeException):
+ """There's no DocProvider specified, and it's needed."""
+ pass
+
+class XMLNamespace(object):
+ '''A handy structure to repsent names in an XML namespace.'''
+
+ def __init__(self, uri):
+ self.uri = uri
+
+ def __call__(self, tag):
+ return '{%s}%s' % (self.uri, tag)
+
+ def __contains__(self, tag):
+ return tag.startswith('{' + str(self) + '}')
+
+ def __repr__(self):
+ return 'XMLNamespace(%r)' % self.uri
+
+ def __str__(self):
+ return '%s' % self.uri
+
+class EmptyNamespace(XMLNamespace):
+ def __init__(self):
+ super(EmptyNamespace, self).__init__('')
+
+ def __call__(self, tag):
+ return tag
+
+# some common namespaces we use
+XMLNS = XMLNamespace('http://www.w3.org/XML/1998/namespace')
+RDFNS = XMLNamespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')
+DCNS = XMLNamespace('http://purl.org/dc/elements/1.1/')
+XINS = XMLNamespace("http://www.w3.org/2001/XInclude")
+XHTMLNS = XMLNamespace("http://www.w3.org/1999/xhtml")
+NCXNS = XMLNamespace("http://www.daisy.org/z3986/2005/ncx/")
+OPFNS = XMLNamespace("http://www.idpf.org/2007/opf")
+PLMETNS = XMLNamespace("http://dl.psnc.pl/schemas/plmet/")
+
+WLNS = EmptyNamespace()
+
+
+@six.python_2_unicode_compatible
+class WLURI(object):
+ """Represents a WL URI. Extracts slug from it."""
+ slug = None
+
+ example = 'http://wolnelektury.pl/katalog/lektura/template/'
+ _re_wl_uri = re.compile(r'http://(www\.)?wolnelektury.pl/katalog/lektur[ay]/'
+ '(?P<slug>[-a-z0-9]+)/?$')
+
+ def __init__(self, uri):
+ uri = six.text_type(uri)
+ self.uri = uri
+ self.slug = uri.rstrip('/').rsplit('/', 1)[-1]
+
+ @classmethod
+ def strict(cls, uri):
+ match = cls._re_wl_uri.match(uri)
+ if not match:
+ raise ValidationError(u'Invalid URI (%s). Should match: %s' % (
+ uri, cls._re_wl_uri.pattern))
+ return cls(uri)
+
+ @classmethod
+ def from_slug(cls, slug):
+ """Contructs an URI from slug.
+
+ >>> print(WLURI.from_slug('a-slug').uri)
+ http://wolnelektury.pl/katalog/lektura/a-slug/
+
+ """
+ uri = 'http://wolnelektury.pl/katalog/lektura/%s/' % slug
+ return cls(uri)
+
+ def __str__(self):
+ return self.uri
+
+ def __eq__(self, other):
+ return self.slug == other.slug
+
+
+class DocProvider(object):
+ """Base class for a repository of XML files.
+
+ Used for generating joined files, like EPUBs.
+ """
+
+ def by_slug(self, slug):
+ """Should return a file-like object with a WL document XML."""
+ raise NotImplementedError
+
+ def by_uri(self, uri, wluri=WLURI):
+ """Should return a file-like object with a WL document XML."""
+ wluri = wluri(uri)
+ return self.by_slug(wluri.slug)
+
+
+class DirDocProvider(DocProvider):
+ """ Serve docs from a directory of files in form <slug>.xml """
+
+ def __init__(self, dir_):
+ self.dir = dir_
+ self.files = {}
+
+ def by_slug(self, slug):
+ fname = slug + '.xml'
+ return open(os.path.join(self.dir, fname), 'rb')
+
+
+from . import dcparser
+
+DEFAULT_BOOKINFO = dcparser.BookInfo(
+ { RDFNS('about'): u'http://wiki.wolnepodreczniki.pl/Lektury:Template'},
+ { DCNS('creator'): [u'Some, Author'],
+ DCNS('title'): [u'Some Title'],
+ DCNS('subject.period'): [u'Unknown'],
+ DCNS('subject.type'): [u'Unknown'],
+ DCNS('subject.genre'): [u'Unknown'],
+ DCNS('date'): ['1970-01-01'],
+ DCNS('language'): [u'pol'],
+ # DCNS('date'): [creation_date],
+ DCNS('publisher'): [u"Fundacja Nowoczesna Polska"],
+ DCNS('description'):
+ [u"""Publikacja zrealizowana w ramach projektu
+ Wolne Lektury (http://wolnelektury.pl). Reprodukcja cyfrowa
+ wykonana przez Bibliotekę Narodową z egzemplarza
+ pochodzącego ze zbiorów BN."""],
+ DCNS('identifier.url'): [WLURI.example],
+ DCNS('rights'):
+ [u"Domena publiczna - zm. [OPIS STANU PRAWNEGO TEKSTU]"] })
+
+def xinclude_forURI(uri):
+ e = etree.Element(XINS("include"))
+ e.set("href", uri)
+ return etree.tostring(e, encoding='unicode')
+
+def wrap_text(ocrtext, creation_date, bookinfo=DEFAULT_BOOKINFO):
+ """Wrap the text within the minimal XML structure with a DC template."""
+ bookinfo.created_at = creation_date
+
+ dcstring = etree.tostring(bookinfo.to_etree(), \
+ method='xml', encoding='unicode', pretty_print=True)
+
+ return u'<utwor>\n' + dcstring + u'\n<plain-text>\n' + ocrtext + \
+ u'\n</plain-text>\n</utwor>'
+
+
+def serialize_raw(element):
+ b = u'' + (element.text or '')
+
+ for child in element.iterchildren():
+ e = etree.tostring(child, method='xml', encoding='unicode',
+ pretty_print=True)
+ b += e
+
+ return b
+
+SERIALIZERS = {
+ 'raw': serialize_raw,
+}
+
+def serialize_children(element, format='raw'):
+ return SERIALIZERS[format](element)
+
+def get_resource(path):
+ return os.path.join(os.path.dirname(__file__), path)
+
+
+class OutputFile(object):
+ """Represents a file returned by one of the converters."""
+
+ _bytes = None
+ _filename = None
+
+ def __del__(self):
+ if self._filename:
+ os.unlink(self._filename)
+
+ def __nonzero__(self):
+ return self._bytes is not None or self._filename is not None
+
+ @classmethod
+ def from_bytes(cls, bytestring):
+ """Converter returns contents of a file as a string."""
+
+ instance = cls()
+ instance._bytes = bytestring
+ return instance
+
+ @classmethod
+ def from_filename(cls, filename):
+ """Converter returns contents of a file as a named file."""
+
+ instance = cls()
+ instance._filename = filename
+ return instance
+
+ def get_bytes(self):
+ """Get file's contents as a bytestring."""
+
+ if self._filename is not None:
+ with open(self._filename, 'rb') as f:
+ return f.read()
+ else:
+ return self._bytes
+
+ def get_file(self):
+ """Get file as a file-like object."""
+
+ if self._bytes is not None:
+ return six.BytesIO(self._bytes)
+ elif self._filename is not None:
+ return open(self._filename, 'rb')
+
+ def get_filename(self):
+ """Get file as a fs path."""
+
+ if self._filename is not None:
+ return self._filename
+ elif self._bytes is not None:
+ temp = NamedTemporaryFile(prefix='librarian-', delete=False)
+ temp.write(self._bytes)
+ temp.close()
+ self._filename = temp.name
+ return self._filename
+ else:
+ return None
+
+ def save_as(self, path):
+ """Save file to a path. Create directories, if necessary."""
+
+ dirname = os.path.dirname(os.path.abspath(path))
+ makedirs(dirname)
+ shutil.copy(self.get_filename(), path)
+
+
+class URLOpener(FancyURLopener):
+ version = 'FNP Librarian (http://github.com/fnp/librarian)'
+urllib._urlopener = URLOpener()
fnp / librarian.git / blobdiff