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"""Commonly used functions for WebDAV support modules."""
__version__='$Revision: 1.2 $'[11:-2]
import string, time, urllib, re
from App_Common import iso8601_date,rfc850_date,rfc1123_date
from App_Common import aq_base
def absattr(attr):
if callable(attr):
return attr()
return attr
def urlfix(url, s):
n=len(s)
if url[-n:]==s: url=url[:-n]
if len(url) > 1 and url[-1]=='/':
url=url[:-1]
return url
def is_acquired(ob):
# Return true if this object is not a direct
# subobject of its aq_parent object.
if not hasattr(ob, 'aq_parent'):
return 0
if hasattr(aq_base(ob.aq_parent), absattr(ob.id)):
return 0
if hasattr(aq_base(ob), 'isTopLevelPrincipiaApplicationObject') and \
ob.isTopLevelPrincipiaApplicationObject:
return 0
return 1
def urlbase(url, ftype=urllib.splittype, fhost=urllib.splithost):
# Return a '/' based url such as '/foo/bar', removing
# type, host and port information if necessary.
if url[0]=='/': return url
type, uri=ftype(url)
host, uri=fhost(uri)
return uri or '/'
def generateLockToken():
# Generate a lock token
# XXX This is simple right now, just lifted from the original shortcut
# in Resource.dav__genlocktoken, but should be replaced by something
# better.
return 'AA9F6414-1D77-11D3-B825-00105A989226:%.03f' % time.time()
def tokenFinder(token):
# takes a string like '<opaquelocktoken:afsdfadfadf> and returns the token
# part.
if not token: return None # An empty string was passed in
if token[0] == '[': return None # An Etag was passed in
if token[0] == '<': token = token[1:-1]
return token[string.find(token,':')+1:]
### If: header handling support. IfParser returns a sequence of
### TagList objects in the order they were parsed which can then
### be used in WebDAV methods to decide whether an operation can
### proceed or to raise HTTP Error 412 (Precondition failed)
IfHdr = re.compile(
r"(?P<resource><.+?>)?\s*\((?P<listitem>[^)]+)\)"
)
ListItem = re.compile(
r"(?P<not>not)?\s*(?P<listitem><[a-zA-Z]+:[^>]*>|\[.*?\])",
re.I)
class TagList:
def __init__(self):
self.resource = None
self.list = []
self.NOTTED = 0
def IfParser(hdr):
out = []
i = 0
while 1:
m = IfHdr.search(hdr[i:])
if not m: break
i = i + m.end()
tag = TagList()
tag.resource = m.group('resource')
if tag.resource: # We need to delete < >
tag.resource = tag.resource[1:-1]
listitem = m.group('listitem')
tag.NOTTED, tag.list = ListParser(listitem)
out.append(tag)
return out
def ListParser(listitem):
out = []
NOTTED = 0
i = 0
while 1:
m = ListItem.search(listitem[i:])
if not m: break
i = i + m.end()
out.append(m.group('listitem'))
if m.group('not'): NOTTED = 1
return NOTTED, out
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