X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/215503e15ca9d6d1e8a053f7bfa359af1af102f3..f6e2bb1feb744c79fad320190251f9c6829ad0ab:/librarian/__init__.py?ds=inline diff --git a/librarian/__init__.py b/librarian/__init__.py old mode 100755 new mode 100644 index 34c493b..9a9e23e --- a/librarian/__init__.py +++ b/librarian/__init__.py @@ -1,39 +1,44 @@ # -*- coding: utf-8 -*- # -# This file is part of Librarian. +# This file is part of Librarian, licensed under GNU Affero GPLv3 or later. +# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. # -# Copyright © 2008,2009,2010 Fundacja Nowoczesna Polska -# -# For full list of contributors see AUTHORS file. -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU Affero General Public License as published by -# the Free Software Foundation, either version 3 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU Affero General Public License for more details. -# -# You should have received a copy of the GNU Affero General Public License -# along with this program. If not, see . -# -# exception classes +from __future__ import with_statement + +import os +import re +import shutil +import urllib + +from util import makedirs + + +class UnicodeException(Exception): + def __str__(self): + """ Dirty workaround for Python Unicode handling problems. """ + return unicode(self).encode('utf-8') -class ParseError(Exception): - - def __init__(self, cause, message=None): - self.cause = cause + def __unicode__(self): + """ Dirty workaround for Python Unicode handling problems. """ + args = self.args[0] if len(self.args) == 1 else self.args try: - self.message = message or self.cause.message - except: - self.message = "No message." + message = unicode(args) + except UnicodeDecodeError: + message = unicode(args, encoding='utf-8', errors='ignore') + return message + +class ParseError(UnicodeException): + pass -class ValidationError(Exception): +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): @@ -46,7 +51,7 @@ class XMLNamespace(object): return '{%s}%s' % (self.uri, tag) def __contains__(self, tag): - return tag.startswith('{'+str(self)+'}') + return tag.startswith('{' + str(self) + '}') def __repr__(self): return 'XMLNamespace(%r)' % self.uri @@ -62,24 +67,100 @@ class EmptyNamespace(XMLNamespace): 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() + +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[-a-z0-9]+)/?$') + + def __init__(self, uri): + uri = unicode(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. + + >>> WLURI.from_slug('a-slug').uri + u'http://wolnelektury.pl/katalog/lektura/a-slug/' + + """ + uri = 'http://wolnelektury.pl/katalog/lektura/%s/' % slug + return cls(uri) + + def __unicode__(self): + return self.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 .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)) + + import lxml.etree as etree import dcparser DEFAULT_BOOKINFO = dcparser.BookInfo( - { RDFNS('about'): u'http://wiki.wolnepodreczniki.pl/Lektury:Template'},\ + { 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'): @@ -87,43 +168,117 @@ DEFAULT_BOOKINFO = dcparser.BookInfo( Wolne Lektury (http://wolnelektury.pl). Reprodukcja cyfrowa wykonana przez Bibliotekę Narodową z egzemplarza pochodzącego ze zbiorów BN."""], - DCNS('identifier.url'): - [u"http://wolnelektury.pl/katalog/lektura/template"], + 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 = 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(),\ + + dcstring = etree.tostring(bookinfo.to_etree(), \ method='xml', encoding=unicode, pretty_print=True) - return u'\n' + dcstring + u'\n\n' + ocrtext +\ - u'\n\n'; + return u'\n' + dcstring + u'\n\n' + ocrtext + \ + u'\n\n' 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) + e = etree.tostring(child, method='xml', encoding=unicode, + pretty_print=True) b += e return b -from wl_light import serialize_nl - - SERIALIZERS = { 'raw': serialize_raw, - 'nl': serialize_nl, } 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.""" + + _string = None + _filename = None + + def __del__(self): + if self._filename: + os.unlink(self._filename) + + def __nonzero__(self): + return self._string is not None or self._filename is not None + + @classmethod + def from_string(cls, string): + """Converter returns contents of a file as a string.""" + + instance = cls() + instance._string = string + 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_string(self): + """Get file's contents as a string.""" + + if self._filename is not None: + with open(self._filename) as f: + return f.read() + else: + return self._string + + def get_file(self): + """Get file as a file-like object.""" + + if self._string is not None: + from StringIO import StringIO + return StringIO(self._string) + elif self._filename is not None: + return open(self._filename) + + def get_filename(self): + """Get file as a fs path.""" + + if self._filename is not None: + return self._filename + elif self._string is not None: + from tempfile import NamedTemporaryFile + temp = NamedTemporaryFile(prefix='librarian-', delete=False) + temp.write(self._string) + 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(urllib.FancyURLopener): + version = 'FNP Librarian (http://github.com/fnp/librarian)' +urllib._urlopener = URLOpener()