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author(no author) <(no author)@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2004-06-27 03:23:29 +0000
committer(no author) <(no author)@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2004-06-27 03:23:29 +0000
commitd26fe5ce2eb543cc372f24646ce2d190f7ce26f0 (patch)
treea47dc888de19e08a389c1af2424b33d9d8e1ca47 /sample/rss/tdiary_plugin/rss-recent.rb
parent4f65f3ab7f11492145e37484cf1437ad22dcbdc7 (diff)
This commit was manufactured by cvs2svn to create branch 'ruby_1_8'.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@6531 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'sample/rss/tdiary_plugin/rss-recent.rb')
-rw-r--r--sample/rss/tdiary_plugin/rss-recent.rb211
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diff --git a/sample/rss/tdiary_plugin/rss-recent.rb b/sample/rss/tdiary_plugin/rss-recent.rb
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+++ b/sample/rss/tdiary_plugin/rss-recent.rb
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+# rss-recent.rb: RSS recent plugin
+#
+# rss_recnet: show recnet list from RSS
+# parameters (default):
+# url: URL of RSS
+# max: max of list itmes(5)
+# cache_time: cache time(second) of RSS(60*60)
+#
+#
+# Copyright (c) 2003-2004 Kouhei Sutou <kou@cozmixng.org>
+# Distributed under the GPL
+#
+
+require "rss/rss"
+
+RSS_RECENT_FIELD_SEPARATOR = "\0"
+RSS_RECENT_ENTRY_SEPARATOR = "\1"
+RSS_RECENT_VERSION = "0.0.4"
+RSS_RECENT_HTTP_HEADER = {
+ "User-Agent" => "tDiary RSS recent plugin version #{RSS_RECENT_VERSION}. " <<
+ "Using RSS parser version is #{::RSS::VERSION}.",
+}
+
+def rss_recent(url, max=5, cache_time=3600)
+ cache_file = "#{@cache_path}/rss-recent.#{CGI.escape(url)}"
+
+ rss_recent_cache_rss(url, cache_file, cache_time.to_i)
+
+ return '' unless test(?r, cache_file)
+
+ rv = "<ul>\n"
+
+ i = 0
+ rss_recent_read_from_cache(cache_file).each do |title, url, time|
+ break if i >= max
+ next if title.nil?
+ rv << '<li>'
+ rv << %Q[<span class="#{rss_recent_modified_class(time)}">]
+ unless url.nil?
+ rv << %Q[<a href="#{CGI.escapeHTML(url)}" title="#{CGI.escapeHTML(title)}]
+ rv << %Q[ (#{CGI.escapeHTML(time.localtime.to_s)})] unless time.nil?
+ rv << %Q[">]
+ end
+ rv << CGI::escapeHTML(title)
+ rv << '</a>' unless url.nil?
+ rv << "(#{rss_recent_modified(time)})"
+ rv << %Q[</span>]
+ rv << "</li>\n"
+ i += 1
+ end
+
+ rv << "</ul>\n"
+
+ rv
+end
+
+class InvalidResourceError < StandardError; end
+
+def rss_recent_cache_rss(url, cache_file, cache_time)
+
+ cached_time = nil
+ cached_time = File.mtime(cache_file) if File.exist?(cache_file)
+
+ if cached_time.nil? or Time.now > cached_time + cache_time
+ require 'time'
+ require 'open-uri'
+ require 'net/http'
+ require 'uri/generic'
+ require 'rss/parser'
+ require 'rss/1.0'
+ require 'rss/2.0'
+ require 'rss/dublincore'
+
+ begin
+ uri = URI.parse(url)
+
+ raise URI::InvalidURIError if uri.scheme != "http"
+
+ rss_source = rss_recent_fetch_rss(uri, cached_time)
+
+ raise InvalidResourceError if rss_source.nil?
+
+ # parse RSS
+ rss = ::RSS::Parser.parse(rss_source, false)
+ raise ::RSS::Error if rss.nil?
+
+ # pre processing
+ begin
+ rss.output_encoding = charset
+ rescue ::RSS::UnknownConversionMethodError
+ end
+
+ rss_infos = rss.items.collect do |item|
+ rss_recent_pubDate_to_dc_date(item)
+ [item.title, item.link, item.dc_date]
+ end
+ rss_recent_write_to_cache(cache_file, rss_infos)
+
+ rescue URI::InvalidURIError
+ rss_recent_write_to_cache(cache_file, [['Invalid URI', url]])
+ rescue InvalidResourceError, ::RSS::Error
+ rss_recent_write_to_cache(cache_file, [['Invalid Resource', url]])
+ end
+ end
+
+end
+
+def rss_recent_fetch_rss(uri, cache_time)
+ rss = nil
+ begin
+ uri.open(rss_recent_http_header(cache_time)) do |f|
+ case f.status.first
+ when "200"
+ rss = f.read
+ # STDERR.puts "Got RSS of #{uri}"
+ when "304"
+ # not modified
+ # STDERR.puts "#{uri} does not modified"
+ else
+ raise InvalidResourceError
+ end
+ end
+ rescue TimeoutError, SocketError, StandardError,
+ SecurityError # occured in redirect
+ raise InvalidResourceError
+ end
+ rss
+end
+
+def rss_recent_http_header(cache_time)
+ header = RSS_RECENT_HTTP_HEADER.dup
+ if cache_time.respond_to?(:rfc2822)
+ header["If-Modified-Since"] = cache_time.rfc2822
+ end
+ header
+end
+
+def rss_recent_write_to_cache(cache_file, rss_infos)
+ File.open(cache_file, 'w') do |f|
+ f.flock(File::LOCK_EX)
+ rss_infos.each do |info|
+ f << info.join(RSS_RECENT_FIELD_SEPARATOR)
+ f << RSS_RECENT_ENTRY_SEPARATOR
+ end
+ f.flock(File::LOCK_UN)
+ end
+end
+
+def rss_recent_read_from_cache(cache_file)
+ require 'time'
+ infos = []
+ File.open(cache_file) do |f|
+ while info = f.gets(RSS_RECENT_ENTRY_SEPARATOR)
+ info = info.chomp(RSS_RECENT_ENTRY_SEPARATOR)
+ infos << info.split(RSS_RECENT_FIELD_SEPARATOR)
+ end
+ end
+ infos.collect do |title, url, time|
+ [
+ rss_recent_convert(title),
+ rss_recent_convert(url),
+ rss_recent_convert(time) {|time| Time.parse(time)},
+ ]
+ end
+end
+
+def rss_recent_convert(str)
+ if str.nil? or str.empty?
+ nil
+ else
+ if block_given?
+ yield str
+ else
+ str
+ end
+ end
+end
+
+# from RWiki
+def rss_recent_modified(t)
+ return '-' unless t
+ dif = (Time.now - t).to_i
+ dif = dif / 60
+ return "#{dif}m" if dif <= 60
+ dif = dif / 60
+ return "#{dif}h" if dif <= 24
+ dif = dif / 24
+ return "#{dif}d"
+end
+
+# from RWiki
+def rss_recent_modified_class(t)
+ return 'dangling' unless t
+ dif = (Time.now - t).to_i
+ dif = dif / 60
+ return "modified-hour" if dif <= 60
+ dif = dif / 60
+ return "modified-today" if dif <= 24
+ dif = dif / 24
+ return "modified-month" if dif <= 30
+ return "modified-year" if dif <= 365
+ return "modified-old"
+end
+
+def rss_recent_pubDate_to_dc_date(target)
+ if target.respond_to?(:pubDate)
+ class << target
+ alias_method(:dc_date, :pubDate)
+ end
+ end
+end