#!/usr/bin/env ruby
# Sidebarize is a quite simple converter, like a lot others.
# But in one way Sidebarize is special: it converts
# feeds into HTML-pages suitable for sidebars in Gecko-browsers.
# import support for all kinds of feeds
require 'rss/0.9'
require 'rss/1.0'
require 'rss/2.0'
# import support for encodings
require 'iconv'
# import support for CGI
require 'cgi'
# import support for getting files from URLs
require 'net/http'
require 'uri'
Version = '0.0.9'
Header = %q(
%s Sidebar
)
class FeedConverter
def initialize
@xml_source = ''
@feed_data = []
@feed_version = ''
@feed_description = ''
end
def from_file(filename)
f = File::open(filename)
@xml_source = f.read
f.close
end
def from_url(url)
@xml_source = Net::HTTP.get(URI.parse(url))
end
def parse
feed = RSS::Parser.parse(@xml_source)
@feed_description = feed.channel.description
@feed_name = feed.channel.title
feed.items.each do |item|
item_data = {}
item_data['title'] = item.title
item_data['link'] = item.link
@feed_data << item_data
end
end
# Output HTML from the internal data structure
def to_html
# header
puts Header % [convert_entity(@feed_name), convert_entity(@feed_description)]
# the entries
@feed_data.each do |item|
puts Entry % [item['link'], convert_entity(item['title'])]
end
# footer
print Footer % Version
end
end
# Converts entities
# uses code by murphy extended with iconv conversion
def convert_entity(text)
text = Iconv.new('iso-8859-15', 'utf-8').iconv(text)
feed = text.inspect[1...-1]
feed.gsub!(/\\([0-7]+)|(.)/m) do
if $2
$&
else
'&#%s;' % $1.to_i(8).to_s(10)
end
end
feed.gsub!('\"', '"')
return feed
end
# Starter
def main
fc = FeedConverter.new
cgi = CGI.new
if cgi.has_key? 'url'
# yeah, the user pointed us to an URL
fc.from_url(cgi['url'])
#fc.from_file('sd.xml')
#fc.from_file('sbarize_design.html')
begin
# try to parse it and to generate HTML
fc.parse
puts 'Content-Type: text/html'
puts
fc.to_html
rescue
# parsing failed so show an error message
puts 'Content-Type: text/html'
puts
puts Header % ['No', 'The specified feed is not valid.']
puts Footer % Version
end
else
# no, we've got no URL, generate error message
puts 'Content-Type: text/plain'
puts
puts Header % ['No', 'You have to set the url=http://domain.tld/path/feed.xml to your feed.']
puts Footer % Version
end
end
main if __FILE__ == $0
generated by Sidebarize %s
