Not correctly processing "If-Modified-Since" in zope.app.file and z3c.blobfile

[Kirill Kuzminykh]

In function zope.app.file.browser.file.FileView.show() (and z3c.blobfile.browser.file.FileView.show()) file modification date and date from Request Header "If-Modified-Since" are not correctly compared.
Value of file modification date calculate as:
>> lmt = zope.datetime.time(modified.isoformat())
Value lmt has type float.

Value of date from Request Header "If-Modified-Since" calculate as:
>> mod_since = long(zope.datetime.time(header))
Value mod_since has type long.

As a result value lmt almost always is more than mod_since on some milliseconds. For example:
lmt = 1243412922.51
mod_since = 1243412922

--------------
My solution this problem
--------------
Necessary change line:
>> lmt = zope.datetime.time(modified.isoformat())
on:
>> lmt = long(zope.datetime.time(modified.isoformat())

PS: sorry for my english

[Kirill Kuzminykh (cykooz)]

https://bugs.launchpad.net/zope.app.file/+bug/537263