Re: Doing content-based mtime determination

Sorry please ignore my last message. Hitted the wrong button!

I'm actually doing the something similar. I find using the last modified  
time as the post time too unstable and date-in-filename not desirable. So  
I have this plug-in that read a data file as RFC2822 message. Basically  
just put this two lines in the beginning of every data file:

   Subject: hello
   Date: 2004-08-01

The call back to use to update the time is cb_filestat. The caveat is now  
pyBlosxom is going to read every message to determine its date. If  
performance is not an issue you can use this plug-in as is. I'm trying to  
build some kind of index but still having got around to do so.

Wai Yip




> I was trying to write a plugin that basically determined the effective
> mtime of an entry based on an in-entry tag like:
>
> TIMESTAMP::2002-04-01-00-00
>
> I like this approach over the date-in-filename approach because
> mucking with the filename means mucking with the URLs of permalinks.
>
> Unfortunately, it appears that the entry hasn't been parsed by the
> time cb_filestat gets called.  Is the right approach in this case to
> have a cb_filelist handler?  It seems it would be too late, and other
> plugins which limit things based on date would have gotten it 'wrong'
> by the time cb_filelist got called.
>
> Any advice appreciated.
>
> --david
>
>
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Subject: hello
Date: 2004-08-01

This is a test post.

import email
import email.Utils
import os, re, time
import sys

__author__ = 'Wai Yip Tung http://tungwaiyip.info'
__version__ = '$Id: pymsg.py, v0.10 2004/07/10 10:25 tungwaiyip Exp $'

def verify_installation(request):
    # there's no configuration needed for this plugin.
    return 1

def cb_entryparser(args):
    args["txt"] = parseMessage
    return args

formats = [
  '%Y-%m-%dT%H:%M:%S%Z',
  '%Y-%m-%dT%H:%M:%S',
  '%Y-%m-%dT%H:%M',
  '%Y-%m-%d',
]

def parseTime(s):
    # Try RFC2822
    # Date: Wed, 25 Feb 2004 16:34:12 -0800
    mtime = email.Utils.parsedate(s)
    if mtime: return mtime

    # Try ISO8601
    # Date: 2002-12-23T08:32-08:00
    for f in formats:
        try:
            mtime = time.strptime(s, f)
            return mtime
        except ValueError:
            pass
    return None

def parseMessage(filename, request):
    f = open(filename, "r")
    msg = email.message_from_file(f)
    data = {'title': msg.get('Subject'),
            'body': msg.get_payload()}
    return data

def cb_filestat(args):
    filename = args["filename"]
    stattuple = args["mtime"]

    f = open(filename, "r")
    msg = email.message_from_file(f)
    date = msg.get('Date')
    if not date:
        return args
    mtime = parseTime(date)
    if mtime:
        mtime = time.mktime(mtime)
        args["mtime"] = tuple(list(stattuple[:8]) + [mtime] + list(stattuple[9:]))
    return args