"""
"""
import calendar
import datetime
import email
import web
from .util import Header
__all__ = [
"Allow",
"ContentEncoding",
"ContentLanguage",
"ContentLength",
"ContentLocation",
"ContentMD5",
"ContentRange",
"ContentType",
"Expires",
"LastModified",
]
def get_timestamp(dt, fmt="rfc822"):
"""
return a string of datetime `dt` in common log format
>>> get_timestamp(datetime.datetime(1970, 1, 1, 1, 1, 1))
'Thu, 01 Jan 1970 01:01:01 GMT'
"""
if dt is None:
dt = datetime.UTC.localize(datetime.now())
fmts = {"rfc822": "%a, %d %b %Y %H:%M:%S GMT", "ncsa": "%d/%b/%Y:%H:%M:%S %z"}
return dt.strftime(fmts[fmt])
def parse_datetime(s):
"""
parses a date/time stamp taken from an HTTP header
"""
return datetime(*email.utils.parsedate(s)[:6])
class Entity(Header):
""""""
class Allow(Entity):
""""""
class ContentEncoding(Entity):
""""""
class ContentLanguage(Entity):
""""""
class ContentLength(Entity):
""""""
class ContentLocation(Entity):
""""""
class ContentMD5(Entity):
""""""
class ContentRange(Entity):
""""""
class ContentType(Entity):
""""""
@property
def content_type(self):
print("DEBUG", self)
# _content_type = str(self).partition(";")[0]
# if not _content_type:
# _content_type = "text/plain"
return str(self) # _content_type
class Expires(Entity):
"""
formats an `Expires` header for `delta` from now
`delta` is a `datetime.timedelta` object or a number of seconds.
"""
def __init__(self, when):
# FIXME either seconds a la TTL or datetime according to W3C
now = web.dt.now()
if isinstance(when, str):
try:
when = int(when)
except ValueError:
then = parse_datetime(when)
when = calendar.timegm(then.utctimetuple()) - calendar.timegm(
now.utctimetuple()
)
if isinstance(when, int):
when = datetime.timedelta(seconds=when)
dt = now + when
self.header = get_timestamp(dt=dt)
class LastModified(Entity):
""""""
# def __init__(self, when):
# self.header = util.format_datetime(when)
