#
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()
return result
+def get_dynamic_path(media, filename, ext=None, maxlen=100):
+ from fnpdjango.utils.text.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):
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(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
- """
- 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
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 []
+
fnp / wolnelektury.git / blobdiff