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4afc07a666
use the first date information of items as site date information if channel doesn't have date information. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8339 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
289 lines
6.7 KiB
Ruby
289 lines
6.7 KiB
Ruby
# -*- indent-tabs-mode: t -*-
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# rss-recent.rb: RSS recent plugin
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#
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# options:
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# @options['rss-recent.use-image-link'] : use image as link
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# instead of text if available.
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#
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# rss_recnet: show recnet list from RSS
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# parameters (default):
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# url: URL of RSS
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# max: max of list itmes(5)
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# cache_time: cache time(second) of RSS(60*60)
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#
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#
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# Copyright (c) 2003-2005 Kouhei Sutou <kou@cozmixng.org>
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# Distributed under the GPL
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#
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require "rss/rss"
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RSS_RECENT_FIELD_SEPARATOR = "\0"
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RSS_RECENT_ENTRY_SEPARATOR = "\1"
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RSS_RECENT_VERSION = "0.0.6"
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RSS_RECENT_HTTP_HEADER = {
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"User-Agent" => "tDiary RSS recent plugin version #{RSS_RECENT_VERSION}. " <<
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"Using RSS parser version is #{::RSS::VERSION}.",
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}
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def rss_recent(url, max=5, cache_time=3600)
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url.untaint
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cache_file = "#{@cache_path}/rss-recent.#{CGI.escape(url)}"
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rss_recent_cache_rss(url, cache_file, cache_time.to_i)
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return '' unless test(?r, cache_file)
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rv = "<div class='rss-recent'>\n"
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site_info, *infos = rss_recent_read_from_cache(cache_file)
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if site_info
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title, url, time, image = site_info
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content = rss_recent_entry_to_html(title, url, time, image)
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rv << "<div class='rss-recent-title'>\n"
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rv << "<span class='#{rss_recent_modified_class(time)}'>#{content}</span>\n"
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rv << "</div>\n"
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end
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have_entry = infos.size > 0 && max > 0
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rv << "<ul>\n" if have_entry
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i = 0
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infos.each do |title, url, time, image|
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break if i >= max
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next if title.nil?
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rv << '<li>'
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rv << %Q[<span class="#{rss_recent_modified_class(time)}">]
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rv << rss_recent_entry_to_html(title, url, time, image)
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rv << %Q[</span>]
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rv << "</li>\n"
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i += 1
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end
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rv << "</ul>\n" if have_entry
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rv << "</div>\n"
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rv
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end
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class InvalidResourceError < StandardError; end
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def rss_recent_cache_rss(url, cache_file, cache_time)
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cached_time = nil
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cached_time = File.mtime(cache_file) if File.exist?(cache_file)
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if cached_time.nil? or Time.now > cached_time + cache_time
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require 'time'
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require 'open-uri'
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require 'net/http'
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require 'uri/generic'
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require 'rss/parser'
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require 'rss/1.0'
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require 'rss/2.0'
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require 'rss/dublincore'
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begin
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require 'rss/image'
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rescue LoadError
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end
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begin
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uri = URI.parse(url)
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raise URI::InvalidURIError if uri.scheme != "http"
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rss_source = rss_recent_fetch_rss(uri, cached_time)
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raise InvalidResourceError if rss_source.nil?
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# parse RSS
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rss = ::RSS::Parser.parse(rss_source, false)
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raise ::RSS::Error if rss.nil?
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# pre processing
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begin
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rss.output_encoding = @conf.charset || charset
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rescue ::RSS::UnknownConversionMethodError
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end
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rss_infos = []
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rss.items.each do |item|
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rss_recent_pubDate_to_dc_date(item)
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if item.respond_to?(:image_item) and item.image_item
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image = item.image_item.about
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else
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image = nil
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end
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rss_infos << [item.title, item.link, item.dc_date, image]
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end
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rss_recent_pubDate_to_dc_date(rss.channel)
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rss_infos.unshift([
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rss.channel.title,
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rss.channel.link,
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rss.channel.dc_date ||
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rss.items.collect{|item| item.dc_date}.compact.first,
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rss.image && rss.image.url,
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])
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rss_recent_write_to_cache(cache_file, rss_infos)
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rescue URI::InvalidURIError
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rss_recent_write_to_cache(cache_file, [['Invalid URI', url]])
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rescue InvalidResourceError, ::RSS::Error
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rss_recent_write_to_cache(cache_file, [['Invalid Resource', url]])
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end
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end
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end
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def rss_recent_fetch_rss(uri, cache_time)
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rss = nil
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begin
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uri.open(rss_recent_http_header(cache_time)) do |f|
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case f.status.first
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when "200"
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rss = f.read
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# STDERR.puts "Got RSS of #{uri}"
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when "304"
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# not modified
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# STDERR.puts "#{uri} does not modified"
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else
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raise InvalidResourceError
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end
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end
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rescue TimeoutError, SocketError, StandardError,
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SecurityError # occured in redirect
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raise InvalidResourceError
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end
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rss
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end
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def rss_recent_http_header(cache_time)
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header = RSS_RECENT_HTTP_HEADER.dup
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if cache_time.respond_to?(:rfc2822)
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header["If-Modified-Since"] = cache_time.rfc2822
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end
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header
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end
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def rss_recent_write_to_cache(cache_file, rss_infos)
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File.open(cache_file, 'w') do |f|
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f.flock(File::LOCK_EX)
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rss_infos.each do |info|
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f << info.join(RSS_RECENT_FIELD_SEPARATOR)
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f << RSS_RECENT_ENTRY_SEPARATOR
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end
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f.flock(File::LOCK_UN)
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end
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end
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def rss_recent_read_from_cache(cache_file)
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require 'time'
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infos = []
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File.open(cache_file) do |f|
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while info = f.gets(RSS_RECENT_ENTRY_SEPARATOR)
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info = info.chomp(RSS_RECENT_ENTRY_SEPARATOR)
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infos << info.split(RSS_RECENT_FIELD_SEPARATOR)
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end
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end
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infos.collect do |title, url, time, image|
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[
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rss_recent_convert(title),
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rss_recent_convert(url),
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rss_recent_convert(time) {|t| Time.parse(t)},
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rss_recent_convert(image),
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]
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end
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end
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def rss_recent_convert(str)
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if str.nil? or str.empty?
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nil
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else
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if block_given?
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yield str
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else
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str
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end
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end
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end
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def rss_recent_entry_to_html(title, url, time, image=nil)
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rv = ""
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unless url.nil?
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rv << %Q[<a href="#{CGI.escapeHTML(url)}" title="#{CGI.escapeHTML(title)}]
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rv << %Q[ (#{CGI.escapeHTML(time.localtime.to_s)})] unless time.nil?
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rv << %Q[">]
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end
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if image and @options['rss-recent.use-image-link']
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rv << %Q[<img src="#{CGI::escapeHTML(image)}"]
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rv << %Q[ title="#{CGI.escapeHTML(title)}"]
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rv << %Q[ alt="site image"]
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rv << %Q[>\n]
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else
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rv << CGI::escapeHTML(title)
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end
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rv << '</a>' unless url.nil?
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rv << "(#{rss_recent_modified(time)})"
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rv
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end
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# from RWiki
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def rss_recent_modified(t)
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return '-' unless t
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dif = (Time.now - t).to_i
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dif = dif / 60
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return "#{dif}m" if dif <= 60
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dif = dif / 60
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return "#{dif}h" if dif <= 24
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dif = dif / 24
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return "#{dif}d"
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end
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# from RWiki
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def rss_recent_modified_class(t)
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return 'dangling' unless t
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dif = (Time.now - t).to_i
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dif = dif / 60
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return "modified-hour" if dif <= 60
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dif = dif / 60
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return "modified-today" if dif <= 24
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dif = dif / 24
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return "modified-month" if dif <= 30
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return "modified-year" if dif <= 365
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return "modified-old"
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end
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def rss_recent_pubDate_to_dc_date(target)
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if target.respond_to?(:pubDate)
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class << target
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alias_method(:dc_date, :pubDate)
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end
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end
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end
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add_conf_proc('rss-recent', label_rss_recent_title) do
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item = 'rss-recent.use-image-link'
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if @mode == 'saveconf'
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@conf[item] = (@cgi.params[item][0] == 't')
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end
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<<-HTML
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<div class"body">
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<h3 class="subtitle">#{label_rss_recent_use_image_link_title}</h3>
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<p>#{label_rss_recent_use_image_link_description}</p>
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<p>
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<select name=#{item}>
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<option value="f"#{@conf[item] ? '' : ' selected'}>
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#{label_rss_recent_not_use_image_link}
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</option>
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<option value="t"#{@conf[item] ? ' selected' : ''}>
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#{label_rss_recent_use_image_link}
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</option>
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</select>
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</p>
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</div>
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HTML
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end
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