auth -> auth_path fixes

[user/henk/code/ruby/rbot.git] / data / rbot / plugins / url.rb

diff --git a/data/rbot/plugins/url.rb b/data/rbot/plugins/url.rb
index ced921330882844ee405aa74e49d820982788600..ca1e6ed86225e6423e865e1602108626771cf343 100644 (file)
--- a/data/rbot/plugins/url.rb
+++ b/data/rbot/plugins/url.rb
@@ -1,13 +1,112 @@
+require 'uri'
+
 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 => false,
+    :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 = Utils.decode_html_entities title
+    title = title[0..255] if title.length > 255
+    "[Link Info] title: #{title}"
+  end
+
+  def read_data_from_response(response, amount)
+
+    amount_read = 0
+    chunks = []
+
+    response.read_body do |chunk|   # read body now
+
+      amount_read += chunk.length
+
+      if amount_read > amount
+        amount_of_overflow = amount_read - amount
+        chunk = chunk[0...-amount_of_overflow]
+      end
+
+      chunks << chunk
+
+      break if amount_read >= amount
+
+    end
+
+    chunks.join('')
+
+  end
+
+  def get_title_for_url(uri_str, depth=@bot.config['http.max_redir'])
+    # This god-awful mess is what the ruby http library has reduced me to.
+    # Python's HTTP lib is so much nicer. :~(
+
+    if depth == 0
+        raise "Error: Maximum redirects hit."
+    end
+
+    debug "+ Getting #{uri_str.to_s}"
+    url = uri_str.kind_of?(URI) ? uri_str : URI.parse(uri_str)
+    return if url.scheme !~ /https?/
+
+    title = nil
+
+    debug "+ connecting to #{url.host}:#{url.port}"
+    http = @bot.httputil.get_proxy(url)
+    http.start { |http|
+
+      http.request_get(url.request_uri(), @bot.httputil.headers) { |response|
+
+        case response
+          when Net::HTTPRedirection
+            # call self recursively if this is a redirect
+            redirect_to = response['location']  || '/'
+            debug "+ redirect location: #{redirect_to.inspect}"
+            url = URI.join(url.to_s, redirect_to)
+            debug "+ whee, redirecting to #{url.to_s}!"
+            return get_title_for_url(url, depth-1)
+          when Net::HTTPSuccess
+            if response['content-type'] =~ /^text\//
+              # since the content is 'text/*' and is small enough to
+              # be a webpage, retrieve the title from the page
+              debug "+ getting #{url.request_uri}"
+              # was 5*10^4 ... seems to much to me ... 4k should be enough for everybody ;)
+              data = read_data_from_response(response, 4096)
+              return get_title_from_html(data)
+            else
+              # content doesn't have title, just display info.
+              size = response['content-length'].gsub(/(\d)(?=\d{3}+(?:\.|$))(\d{3}\..*)?/,'\1,\2')
+              size = size ? ", size: #{size} bytes" : ""
+              return "[Link Info] type: #{response['content-type']}#{size}"
+            end
+          else
+            return "[Link Info] Error getting link (#{response.code} - #{response.message})"
+          end # end of "case response"
+
+      } # end of request block
+    } # end of http start block
+
+    return title
+
+  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?
@@ -16,13 +115,28 @@ class UrlPlugin < Plugin
       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}..."
+          begin
+          title = get_title_for_url urlstr
+          if title
+            m.reply title
+            debug "Title found!"
+          else
+            debug "Title not found!"
+          end
+          rescue => e
+            debug "Failed: #{e}"
+          end
+        end
+
         # check to see if this url is already listed
-        return if list.find {|u|
-          u.url == urlstr
-        }
+        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 > 50 # TODO make this configurable
+        if list.length > @bot.config['url.max_urls']
           list.pop
         end
         debug "storing url #{url.url}"
@@ -54,7 +168,7 @@ class UrlPlugin < Plugin
     string = params[:string]
     max = 10 if max > 10
     max = 1 if max < 1
-    regex = Regexp.new(string)
+    regex = Regexp.new(string, Regexp::IGNORECASE)
     list = @registry[channel].find_all {|url|
       regex.match(url.url) || regex.match(url.nick)
     }