from __future__ import with_statement
import random
+import re
import time
from base64 import urlsafe_b64encode
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 errno import EEXIST, ENOENT
from fcntl import flock, LOCK_EX
from zipfile import ZipFile
+from traceback import print_exc
-from librarian import DocProvider
from reporting.utils import read_chunks
from celery.task import task
import catalogue.models
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_and_lang(self, slug, language):
- if slug == self.book.slug and language == self.language:
- return open(self.book.xml_file.path)
- else:
- return type(self.book).objects.get(
- slug=slug, language=language).xml_file
-
-
class LockFile(object):
"""
A file lock monitor class; createas an ${objname}.lock
for chunk in read_chunks(f):
self.write(chunk)
-@task
+@task(rate_limit=settings.CATALOGUE_CUSTOMPDF_RATE_LIMIT)
def async_build_pdf(book_id, customizations, file_name):
"""
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
"""
- 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."
+ try:
+ 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."
+ except Exception, e:
+ print "Error during pdf creation: %s" % e
+ print_exc
+ raise e
class MultiQuerySet(object):
return self.count()
def __getitem__(self, item):
- indices = (offset, stop, step) = item.indices(self.count())
+ 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:
else:
offset = 0
stop = total_len - len(items)
- continue
\ No newline at end of file
+ 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.
+ """
+ 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
fnp / wolnelektury.git / blobdiff