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# size.py - plugin that lists pages that could be slow to load
#
# Copyright (C) 1998, 1999 Albert Hopkins (marduk)
# Copyright (C) 2002 Mike W. Meyer
# Copyright (C) 2005, 2006, 2011, 2013 Arthur de Jong
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# The files produced as output from the software do not automatically fall
# under the copyright of the software, unless explicitly stated otherwise.
"""Present a list of pages that are large and probably slow to download."""
__title__ = "what's big"
__author__ = 'Arthur de Jong'
__outputfile__ = 'size.html'
from webcheck import config
from webcheck.db import Session, Link
from webcheck.output import render
def get_size(link, seen=None):
"""Return the size of the link and all its embedded links, counting each
link only once."""
# make a new list
if seen is None:
seen = set()
# add this link to the list
seen.add(link)
# if we don't known about our total size yet, calculate
if not hasattr(link, 'total_size'):
# add our size
size = link.size or 0
# add sizes of embedded objects
for embed in link.embedded:
if embed not in seen:
size += get_size(embed, seen)
link.total_size = size
return link.total_size
def generate(crawler):
"""Output the list of large pages."""
session = Session()
links = session.query(Link).filter_by(is_page=True, is_internal=True)
links = [x for x in links
if get_size(x) >= config.REPORT_SLOW_URL_SIZE * 1024]
links.sort(lambda a, b: cmp(b.total_size, a.total_size))
render(__outputfile__, crawler=crawler, title=__title__,
links=links)
session.close()
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