* lib/rss: rss library imported. [ruby-dev:22726]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5566 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

sample/rss/list_description.rb

@@ -0,0 +1,84 @@
+#!/usr/bin/env ruby
+
+require "nkf"
+class String
+	# From tdiary.rb
+	def shorten( len = 120 )
+		lines = NKF::nkf( "-e -m0 -f#{len}", self.gsub( /\n/, ' ' ) ).split( /\n/ )
+		lines[0].concat( '...' ) if lines[0] and lines[1]
+		lines[0]
+	end
+end
+
+require "rss/parser"
+require "rss/1.0"
+require "rss/2.0"
+require "rss/dublincore"
+
+channels = {}
+verbose = false
+
+def error(exception)
+	mark = "=" * 20
+	mark = "#{mark} error #{mark}"
+	puts mark
+	puts exception.class
+	puts exception.message
+	puts exception.backtrace
+	puts mark
+end
+
+before_time = Time.now
+ARGV.each do |fname|
+	if fname == '-v'
+		verbose = true
+		next
+	end
+	rss = nil
+	f = File.new(fname).read
+	begin
+		## do validate parse
+		rss = RSS::Parser.parse(f)
+	rescue RSS::InvalidRSSError
+		error($!) if verbose
+		## do non validate parse for invalid RSS 1.0
+		begin
+			rss = RSS::Parser.parse(f, false)
+		rescue RSS::Error
+			## invalid RSS.
+			error($!) if verbose
+		end
+	rescue RSS::Error
+		error($!) if verbose
+	end
+	if rss.nil?
+		puts "#{fname} does not include RSS 1.0 or 0.9x/2.0"
+	else
+		begin
+			rss.output_encoding = "euc-jp"
+		rescue RSS::UnknownConversionMethodError
+			error($!) if verbose
+		end
+		rss.channel.title ||= "Unknown"
+		rss.items.each do |item|
+			item.title ||= "Unknown"
+			channels[rss.channel.title] ||= []
+			channels[rss.channel.title] << item if item.description
+		end
+	end
+end
+processing_time = Time.now - before_time
+
+channels.sort do |x, y|
+	x[0] <=> y[0]
+end[0..20].each do |title, items|
+	puts "Channel : #{title}" unless items.empty?
+	items.sort do |x, y|
+		x.title <=> y.title
+	end[0..10].each do |item|
+		puts "  Item : #{item.title.shorten(50)}"
+		puts "    Description : #{item.description.shorten(50)}"
+	end
+end
+
+puts "Processing Time : #{processing_time}s"