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#
# Copyright (c) 2004 SASADA Koichi <ko1 at atdot.net>
#
# This program is free software with ABSOLUTELY NO WARRANTY.
# You can re-distribute and/or modify this program under
# the same terms of the Ruby's lisence.
#
#
# $Id: rss_check.rb 40 2004-07-05 19:09:05Z ko1 $
# Create : K.S. Sat, 24 Apr 2004 12:10:31 +0900
#
require "rss/parser"
require "rss/1.0"
require "rss/2.0"
require "rss/syndication"
require "rss/dublincore"
require "open-uri"
require 'uri'
require 'yaml/store'
require 'csv'
require 'stringio'
require 'zlib'
class RSS_Check
class RSS_File
def initialize path, init_now
@uri = URI.parse(path)
@entry_time = @file_time = (init_now ? Time.now : Time.at(0))
end
def check
if (mt=mtime) > @file_time
@file_time = mt
check_entries
else
[]
end
end
def date_of e
if e.respond_to? :dc_date
e.dc_date
else
e.pubDate || 0
end
end
def check_entries
rss = RSS::Parser.parse(read_content, false)
et = @entry_time
items = rss.items.sort_by{|e|
date_of(e)
}.map{|e|
if e.dc_date > @entry_time
if date_of(e) > et
et = date_of(e)
end
{
:about => e.about,
:title => e.title,
:ccode => 'UTF-8'
}
end
}.compact
@entry_time = et
items
end
def read_content
case @uri.scheme
when 'http'
open(@uri){|f|
if f.content_encoding.any?{|e| /gzip/ =~ e}
Zlib::GzipReader.new(StringIO.new(f.read)).read || ''
else
f.read
end
}
else
open(@uri.to_s){|f|
f.read
}
end
end
def mtime
case @uri.scheme
when 'http'
open(@uri){|f|
f.last_modified || Time.now
}
else
File.mtime(@rss_file)
end
end
end
class LIRS_File < RSS_File
def check_entries
et = @entry_time
res = []
CSV::Reader.parse(read_content){|row|
last_detected = Time.at(row[2].data.to_i)
if last_detected > @entry_time && row[1].data != row[2].data
if last_detected > et
et = last_detected
end
res << {
:about => row[5].data,
:title => row[6].data,
:ccode => 'EUC-JP'
}
end
}
@entry_time = et
res
end
end
def initialize paths, cache_file=nil, init_now=false
@paths = paths
@db = YAML::Store.new(cache_file) if cache_file
@rss_files = paths.map{|uri|
load_file(uri) ||
if /LIRS:(.+)/ =~ uri
LIRS_File.new($1, init_now)
else
RSS_File.new(uri, init_now)
end
}
end
def check
@rss_files.map{|rf|
rf.check
}.flatten
end
def dump
@db.transaction{
@paths.each_with_index{|path, i|
@db[path] = @rss_files[i]
}
} if @db
end
def load_file file
@db.transaction{
@db[file]
} if @db
end
def clear
if @db
@db.transaction{
@db.keys.each{|k|
@db.delete k
}
}
end
end
end
if $0 == __FILE__
rss_uri = %w(
http://www.ruby-lang.org/ja/index.rdf
http://slashdot.jp/slashdotjp.rss
http://www3.asahi.com/rss/index.rdf
http://pcweb.mycom.co.jp/haishin/rss/index.rdf
http://japan.cnet.com/rss/index.rdf
http://blog.japan.cnet.com/umeda/index.rdf
http://jvn.doi.ics.keio.ac.jp/rss/jvnRSS.rdf
)
lirs_uri = [
'LIRS:http://rrr.jin.gr.jp/~znz/samidare/sites.lirs.gz'
]
rssc = RSS_Check.new(
rss_uri + lirs_uri,
ARGV.shift || './rss_cache',
false # false
)
require 'iconv'
require 'kconv'
ic = Iconv.open("EUC-JP", "UTF-8")
rssc.check.each{|e|
puts e[:about]
title = (e[:ccode] == 'UTF-8') ? ic.iconv(e[:title]) : e[:title]
puts title
}
rssc.dump
end
|
