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require 'net/http'
require 'uri'
require 'cgi'
Url = Struct.new("Url", :channel, :nick, :time, :url)
TITLE_RE = /<\s*?title\s*?>(.+?)<\s*?\/title\s*?>/im
class UrlPlugin < Plugin
BotConfig.register BotConfigIntegerValue.new('url.max_urls',
:default => 100, :validate => Proc.new{|v| v > 0},
:desc => "Maximum number of urls to store. New urls replace oldest ones.")
BotConfig.register BotConfigBooleanValue.new('url.display_link_info',
:default => true,
:desc => "Get the title of any links pasted to the channel and display it (also tells if the link is broken or the site is down)")
def initialize
super
@registry.set_default(Array.new)
end
def help(plugin, topic="")
"urls [<max>=4] => list <max> last urls mentioned in current channel, urls search [<max>=4] <regexp> => search for matching urls. In a private message, you must specify the channel to query, eg. urls <channel> [max], urls search <channel> [max] <regexp>"
end
def get_title_from_html(pagedata)
return unless TITLE_RE.match(pagedata)
title = $1.strip.gsub(/\s*\n+\s*/, " ")
title = CGI::unescapeHTML title
title = title[0..255] if title.length > 255
"[Link Info] title: #{title}"
end
def get_title_for_url(uri_str)
# This god-awful mess is what the ruby http library has reduced me to.
# Python's HTTP lib is so much nicer. :~(
puts "+ Getting #{uri_str}"
url = URI.parse(uri_str)
return if url.scheme !~ /https?/
puts "+ connecting to #{url.host}:#{url.port}"
http = @bot.httputil.get_proxy(url)
title = http.start do |http|
url.path = '/' if url.path == ''
head = http.request_head(url.path)
case head
when Net::HTTPRedirection then
# call self recursively if this is a redirect
redirect_to = head['location']
puts "+ redirect location: #{redirect_to}"
url = URI.join url.to_s, redirect_to
puts "+ whee, redirecting to #{url.to_s}!"
title = get_title_for_url(url.to_s)
when Net::HTTPSuccess then
if head['content-type'] =~ /^text\//
# content is 'text/*'
# retrieve the title from the page
puts "+ getting #{url.request_uri}"
response = http.request_get(url.request_uri)
return get_title_from_html(response.body)
else
# content isn't 'text/*'... display info about the file.
size = head['content-length'].gsub(/(\d)(?=\d{3}+(?:\.|$))(\d{3}\..*)?/,'\1,\2')
#lastmod = head['last-modified']
return "[Link Info] type: #{head['content-type']}#{size ? ", size: #{size} bytes" : ""}"
end
when Net::HTTPClientError then
return "[Link Info] Error getting link (#{head.code} - #{head.message})"
when Net::HTTPServerError then
return "[Link Info] Error getting link (#{head.code} - #{head.message})"
end
end
rescue SocketError => e
return "[Link Info] Error connecting to site (#{e.message})"
end
def listen(m)
return unless m.kind_of?(PrivMessage)
return if m.address?
# TODO support multiple urls in one line
if m.message =~ /(f|ht)tps?:\/\//
if m.message =~ /((f|ht)tps?:\/\/.*?)(?:\s+|$)/
urlstr = $1
list = @registry[m.target]
if @bot.config['url.display_link_info']
debug "Getting title for #{urlstr}..."
title = get_title_for_url urlstr
if title
m.reply title
debug "Title found!"
else
debug "Title not found!"
end
end
# check to see if this url is already listed
return if list.find {|u| u.url == urlstr }
url = Url.new(m.target, m.sourcenick, Time.new, urlstr)
debug "#{list.length} urls so far"
if list.length > @bot.config['url.max_urls']
list.pop
end
debug "storing url #{url.url}"
list.unshift url
debug "#{list.length} urls now"
@registry[m.target] = list
end
end
end
def urls(m, params)
channel = params[:channel] ? params[:channel] : m.target
max = params[:limit].to_i
max = 10 if max > 10
max = 1 if max < 1
list = @registry[channel]
if list.empty?
m.reply "no urls seen yet for channel #{channel}"
else
list[0..(max-1)].each do |url|
m.reply "[#{url.time.strftime('%Y/%m/%d %H:%M:%S')}] <#{url.nick}> #{url.url}"
end
end
end
def search(m, params)
channel = params[:channel] ? params[:channel] : m.target
max = params[:limit].to_i
string = params[:string]
max = 10 if max > 10
max = 1 if max < 1
regex = Regexp.new(string)
list = @registry[channel].find_all {|url|
regex.match(url.url) || regex.match(url.nick)
}
if list.empty?
m.reply "no matches for channel #{channel}"
else
list[0..(max-1)].each do |url|
m.reply "[#{url.time.strftime('%Y/%m/%d %H:%M:%S')}] <#{url.nick}> #{url.url}"
end
end
end
end
plugin = UrlPlugin.new
plugin.map 'urls search :channel :limit :string', :action => 'search',
:defaults => {:limit => 4},
:requirements => {:limit => /^\d+$/},
:public => false
plugin.map 'urls search :limit :string', :action => 'search',
:defaults => {:limit => 4},
:requirements => {:limit => /^\d+$/},
:private => false
plugin.map 'urls :channel :limit', :defaults => {:limit => 4},
:requirements => {:limit => /^\d+$/},
:public => false
plugin.map 'urls :limit', :defaults => {:limit => 4},
:requirements => {:limit => /^\d+$/},
:private => false
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