from __future__ import with_statement
import random
+import re
import time
from base64 import urlsafe_b64encode
-from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
+from django.http import HttpResponse
from django.core.files.uploadedfile import UploadedFile
-from django.core.files.base import File
from django.core.files.storage import DefaultStorage
+from django.utils.encoding import force_unicode
from django.utils.hashcompat import sha_constructor
from django.conf import settings
-from celery.task import task
from os import mkdir, path, unlink
from errno import EEXIST, ENOENT
from fcntl import flock, LOCK_EX
from zipfile import ZipFile
-from librarian import DocProvider
from reporting.utils import read_chunks
-from celery.task import task
-import catalogue.models
# Use the system (hardware-based) random number generator if it exists.
if hasattr(random, 'SystemRandom'):
return result
+def get_dynamic_path(media, filename, ext=None, maxlen=100):
+ from slughifi import slughifi
+
+ # how to put related book's slug here?
+ if not ext:
+ # BookMedia case
+ ext = media.formats[media.type].ext
+ if media is None or not media.name:
+ name = slughifi(filename.split(".")[0])
+ else:
+ name = slughifi(media.name)
+ return 'book/%s/%s.%s' % (ext, name[:maxlen-len('book/%s/.%s' % (ext, ext))-4], ext)
+
+
+# TODO: why is this hard-coded ?
+def book_upload_path(ext=None, maxlen=100):
+ return lambda *args: get_dynamic_path(*args, ext=ext, maxlen=maxlen)
+
+
class ExistingFile(UploadedFile):
def __init__(self, path, *args, **kwargs):
self.path = path
- return super(ExistingFile, self).__init__(*args, **kwargs)
+ super(ExistingFile, self).__init__(*args, **kwargs)
def temporary_file_path(self):
return self.path
pass
-class ORMDocProvider(DocProvider):
- """Used for getting books' children."""
-
- def __init__(self, book):
- self.book = book
-
- def by_slug(self, slug):
- if slug == self.book.slug:
- return self.book.xml_file
- else:
- return type(self.book).objects.get(slug=slug).xml_file
-
-
class LockFile(object):
"""
A file lock monitor class; createas an ${objname}.lock
try:
unlink(self.lockname)
except OSError as oe:
- if oe.errno != oe.EEXIST:
+ if oe.errno != EEXIST:
raise oe
self.lock.close()
-@task
+#@task
def create_zip(paths, zip_slug):
"""
Creates a zip in MEDIA_ROOT/zip directory containing files from path.
for chunk in read_chunks(f):
self.write(chunk)
-@task
-def async_build_pdf(book_id, customizations, file_name):
+class MultiQuerySet(object):
+ def __init__(self, *args, **kwargs):
+ self.querysets = args
+ self._count = None
+
+ def count(self):
+ if not self._count:
+ self._count = sum(len(qs) for qs in self.querysets)
+ return self._count
+
+ def __len__(self):
+ return self.count()
+
+ def __getitem__(self, item):
+ try:
+ indices = (offset, stop, step) = item.indices(self.count())
+ except AttributeError:
+ # it's not a slice - make it one
+ return self[item : item + 1][0]
+ items = []
+ total_len = stop - offset
+ for qs in self.querysets:
+ if len(qs) < offset:
+ offset -= len(qs)
+ else:
+ items += list(qs[offset:stop])
+ if len(items) >= total_len:
+ return items
+ else:
+ offset = 0
+ stop = total_len - len(items)
+ continue
+
+
+def truncate_html_words(s, num, end_text='...'):
+ """Truncates HTML to a certain number of words (not counting tags and
+ comments). Closes opened tags if they were correctly closed in the given
+ html. Takes an optional argument of what should be used to notify that the
+ string has been truncated, defaulting to ellipsis (...).
+
+ Newlines in the HTML are preserved.
+
+ This is just a version of django.utils.text.truncate_html_words with no space before the end_text.
"""
- A celery task to generate pdf files.
- Accepts the same args as Book.build_pdf, but with book id as first parameter
- instead of Book instance
+ s = force_unicode(s)
+ length = int(num)
+ if length <= 0:
+ return u''
+ html4_singlets = ('br', 'col', 'link', 'base', 'img', 'param', 'area', 'hr', 'input')
+ # Set up regular expressions
+ re_words = re.compile(r'&.*?;|<.*?>|(\w[\w-]*)', re.U)
+ re_tag = re.compile(r'<(/)?([^ ]+?)(?: (/)| .*?)?>')
+ # Count non-HTML words and keep note of open tags
+ pos = 0
+ end_text_pos = 0
+ words = 0
+ open_tags = []
+ while words <= length:
+ m = re_words.search(s, pos)
+ if not m:
+ # Checked through whole string
+ break
+ pos = m.end(0)
+ if m.group(1):
+ # It's an actual non-HTML word
+ words += 1
+ if words == length:
+ end_text_pos = pos
+ continue
+ # Check for tag
+ tag = re_tag.match(m.group(0))
+ if not tag or end_text_pos:
+ # Don't worry about non tags or tags after our truncate point
+ continue
+ closing_tag, tagname, self_closing = tag.groups()
+ tagname = tagname.lower() # Element names are always case-insensitive
+ if self_closing or tagname in html4_singlets:
+ pass
+ elif closing_tag:
+ # Check for match in open tags list
+ try:
+ i = open_tags.index(tagname)
+ except ValueError:
+ pass
+ else:
+ # SGML: An end tag closes, back to the matching start tag, all unclosed intervening start tags with omitted end tags
+ open_tags = open_tags[i+1:]
+ else:
+ # Add it to the start of the open tags list
+ open_tags.insert(0, tagname)
+ if words <= length:
+ # Don't try to close tags if we don't need to truncate
+ return s
+ out = s[:end_text_pos]
+ if end_text:
+ out += end_text
+ # Close any tags still open
+ for tag in open_tags:
+ out += '</%s>' % tag
+ # Return string
+ return out
+
+
+def customizations_hash(customizations):
+ customizations.sort()
+ return hash(tuple(customizations))
+
+
+def get_customized_pdf_path(book, customizations):
+ """
+ Returns a MEDIA_ROOT relative path for a customized pdf. The name will contain a hash of customization options.
+ """
+ h = customizations_hash(customizations)
+ return 'book/%s/%s-custom-%s.pdf' % (book.slug, book.slug, h)
+
+
+def clear_custom_pdf(book):
+ """
+ Returns a list of paths to generated customized pdf of a book
+ """
+ from waiter.utils import clear_cache
+ clear_cache('book/%s' % book.slug)
+
+
+class AppSettings(object):
+ """Allows specyfying custom settings for an app, with default values.
+
+ Just subclass, set some properties and instantiate with a prefix.
+ Getting a SETTING from an instance will check for prefix_SETTING
+ in project settings if set, else take the default. The value will be
+ then filtered through _more_SETTING method, if there is one.
+
"""
- book = catalogue.models.Book.objects.get(id=book_id)
- print "will gen %s" % DefaultStorage().path(file_name)
- if not DefaultStorage().exists(file_name):
- book.build_pdf(customizations=customizations, file_name=file_name)
- print "done."
+ def __init__(self, prefix):
+ self._prefix = prefix
+
+ def __getattribute__(self, name):
+ if name.startswith('_'):
+ return object.__getattribute__(self, name)
+ value = getattr(settings,
+ "%s_%s" % (self._prefix, name),
+ object.__getattribute__(self, name))
+ more = "_more_%s" % name
+ if hasattr(self, more):
+ value = getattr(self, more)(value)
+ return value
fnp / wolnelektury.git / blobdiff