Use offset_linkid instead of offset to scan >1000 entities.
this is a first-cut. It works in all the ways I could make earlier
versions fail. It passes link_id as URL parameters. It also has a new
class LinkCreator which makes the main body of getListContents even easier
to write.
I wasn't sure if link_id's could have non alphanumeric characters; if so, they
need to be URL encoded/decoded.
I also need to go and remove any mention of raw offsets now, because we don't
use them.
I believe I've talked about this approach with a few of you and it sounded
reasonable. Feel free to roll-back/fix/amend/comment-for-me-to-fix. This is
my first big-logic-change to Melange.
Patch by: Dan Bentley
"""
Portable file locking utilities.
Based partially on example by Jonathan Feignberg <jdf@pobox.com> in the Python
Cookbook, licensed under the Python Software License.
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65203
Example Usage::
>>> from django.core.files import locks
>>> f = open('./file', 'wb')
>>> locks.lock(f, locks.LOCK_EX)
>>> f.write('Django')
>>> f.close()
"""
__all__ = ('LOCK_EX','LOCK_SH','LOCK_NB','lock','unlock')
system_type = None
try:
import win32con
import win32file
import pywintypes
LOCK_EX = win32con.LOCKFILE_EXCLUSIVE_LOCK
LOCK_SH = 0
LOCK_NB = win32con.LOCKFILE_FAIL_IMMEDIATELY
__overlapped = pywintypes.OVERLAPPED()
system_type = 'nt'
except (ImportError, AttributeError):
pass
try:
import fcntl
LOCK_EX = fcntl.LOCK_EX
LOCK_SH = fcntl.LOCK_SH
LOCK_NB = fcntl.LOCK_NB
system_type = 'posix'
except (ImportError, AttributeError):
pass
def fd(f):
"""Get a filedescriptor from something which could be a file or an fd."""
return hasattr(f, 'fileno') and f.fileno() or f
if system_type == 'nt':
def lock(file, flags):
hfile = win32file._get_osfhandle(fd(file))
win32file.LockFileEx(hfile, flags, 0, -0x10000, __overlapped)
def unlock(file):
hfile = win32file._get_osfhandle(fd(file))
win32file.UnlockFileEx(hfile, 0, -0x10000, __overlapped)
elif system_type == 'posix':
def lock(file, flags):
fcntl.lockf(fd(file), flags)
def unlock(file):
fcntl.lockf(fd(file), fcntl.LOCK_UN)
else:
# File locking is not supported.
LOCK_EX = LOCK_SH = LOCK_NB = None
# Dummy functions that don't do anything.
def lock(file, flags):
pass
def unlock(file):
pass