httputil.py 文件源码

def format_timestamp(ts):
    """Formats a timestamp in the format used by HTTP.

    The argument may be a numeric timestamp as returned by `time.time`,
    a time tuple as returned by `time.gmtime`, or a `datetime.datetime`
    object.

    >>> format_timestamp(1359312200)
    'Sun, 27 Jan 2013 18:43:20 GMT'
    """
    if isinstance(ts, (tuple, time.struct_time)):
        pass
    elif isinstance(ts, datetime.datetime):
        ts = ts.utctimetuple()
    elif isinstance(ts, numbers.Real):
        ts = time.gmtime(ts)
    else:
        raise TypeError("unknown timestamp type: %r" % ts)
    return time.strftime("%a, %d %b %Y %H:%M:%S GMT", ts)

# _parseparam and _parse_header are copied and modified from python2.7's cgi.py
# The original 2.7 version of this code did not correctly support some
# combinations of semicolons and double quotes.