#
from __future__ import with_statement
+import hashlib
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 traceback import print_exc
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'):
def get_random_hash(seed):
- sha_digest = sha_constructor('%s%s%s%s' %
+ sha_digest = hashlib.sha1('%s%s%s%s' %
(randrange(0, MAX_SESSION_KEY), time.time(), unicode(seed).encode('utf-8', 'replace'),
settings.SECRET_KEY)).digest()
return urlsafe_b64encode(sha_digest).replace('=', '').replace('_', '-').lower()
-def split_tags(tags):
- result = {}
+def split_tags(tags, initial=None):
+ if initial is None:
+ result = {}
+ else:
+ result = initial
+
for tag in tags:
result.setdefault(tag.category, []).append(tag)
return result
self.lock.close()
-@task
+#@task
def create_zip(paths, zip_slug):
"""
Creates a zip in MEDIA_ROOT/zip directory containing files from path.
class AttachmentHttpResponse(HttpResponse):
"""Response serving a file to be downloaded.
"""
- def __init__ (self, file_path, file_name, mimetype):
+ def __init__(self, file_path, file_name, mimetype):
super(AttachmentHttpResponse, self).__init__(mimetype=mimetype)
self['Content-Disposition'] = 'attachment; filename=%s' % file_name
self.file_path = file_path
for chunk in read_chunks(f):
self.write(chunk)
-@task
-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
- """
- 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):
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())
+ (offset, stop, step) = item.indices(self.count())
except AttributeError:
# it's not a slice - make it one
return self[item : item + 1][0]
stop = total_len - len(items)
continue
+class SortedMultiQuerySet(MultiQuerySet):
+ def __init__(self, *args, **kwargs):
+ self.order_by = kwargs.pop('order_by', None)
+ self.sortfn = kwargs.pop('sortfn', None)
+ if self.order_by is not None:
+ self.sortfn = lambda a, b: cmp((getattr(a, f) for f in self.order_by),
+ (getattr(b, f) for f in self.order_by))
+ super(SortedMultiQuerySet, self).__init__(*args, **kwargs)
+
+ def __getitem__(self, item):
+ sort_heads = [0] * len(self.querysets)
+ try:
+ (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
+ skipped = 0
+ i_s = range(len(sort_heads))
+
+ while len(items) < total_len:
+ candidate = None
+ candidate_i = None
+ for i in i_s:
+ def get_next():
+ return self.querysets[i][sort_heads[i]]
+ try:
+ if candidate is None:
+ candidate = get_next()
+ candidate_i = i
+ else:
+ competitor = get_next()
+ if self.sortfn(candidate, competitor) > 0:
+ candidate = competitor
+ candidate_i = i
+ except IndexError:
+ continue # continue next sort_head
+ # we have no more elements:
+ if candidate is None:
+ break
+ sort_heads[candidate_i] += 1
+ if skipped < offset:
+ skipped += 1
+ continue # continue next item
+ items.append(candidate)
+
+ return items
+
def truncate_html_words(s, num, end_text='...'):
"""Truncates HTML to a certain number of words (not counting tags and
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.
+
+ """
+ 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
+
+
+def trim_query_log(trim_to=25):
+ """
+connection.queries includes all SQL statements -- INSERTs, UPDATES, SELECTs, etc. Each time your app hits the database, the query will be recorded.
+This can sometimes occupy lots of memory, so trim it here a bit.
+ """
+ if settings.DEBUG:
+ from django.db import connection
+ connection.queries = trim_to > 0 \
+ and connection.queries[-trim_to:] \
+ or []
+
+
+def delete_from_cache_by_language(cache, key_template):
+ cache.delete_many([key_template % lc for lc, ln in settings.LANGUAGES])
fnp / wolnelektury.git / blobdiff