Fix an issue with RSS feeds having no itemDate

[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 286e8c4a38c8a4d449b5c15321fae3008428e163..7190ec5d36b4b87de12119a557caec9826ce735d 100644 (file)
--- a/data/rbot/plugins/url.rb
+++ b/data/rbot/plugins/url.rb
@@ -1,15 +1,15 @@
-require 'open-uri'
+require 'uri'
 
 Url = Struct.new("Url", :channel, :nick, :time, :url)
-TITLE_RE = /<\s*title\s*>(.+)<\s*\/title\s*>/im
+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.say_titles',
-    :default => true, 
-    :desc => "Get the title of any links pasted to the channel and display it (Also, tells if the link is broken)")
+  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
@@ -20,21 +20,91 @@ class UrlPlugin < Plugin
     "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_for_url(url)
-    begin
-      pagedata = open(url).read
-      return unless TITLE_RE.match(pagedata)
-      title = $1.strip.gsub(/\s*\n\s*/, " ")
-      title = title[0..255] if title.length > 255 
-      "Title: #{title}"
+  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
 
-    rescue SocketError => e
-      "Title: ^- Error connecting to site (#{e.message})"
-    rescue OpenURI::HTTPError => e
-      "Title: ^- Error getting page (#{e.message})"
-    rescue Exception => e
-      "Title: ^- Error: #{e.inspect}"
+      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)
@@ -46,7 +116,7 @@ class UrlPlugin < Plugin
         urlstr = $1
         list = @registry[m.target]
 
-        if @bot.config['url.say_titles']
+        if @bot.config['url.display_link_info']
           debug "Getting title for #{urlstr}..."
           title = get_title_for_url urlstr
           if title
@@ -94,7 +164,7 @@ 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)
     }