Module: Feedbag

Defined in:
lib/feedbag.rb

Defined Under Namespace

Classes: Feed

Class Method Summary collapse

Class Method Details

._is_http_valid(uri, orig_url) ⇒ Object

not used. yet.



180
181
182
183
184
185
186
187
188
189
 
# File 'lib/feedbag.rb', line 180

def self._is_http_valid(uri, orig_url)
	req = Net::HTTP.get_response(uri)
	orig_uri = URI.parse(orig_url)
	case req
		when Net::HTTPSuccess then
			return true
		else
			return false
	end
end

.add_feed(feed_url, orig_url, base_uri = nil, title = "") ⇒ Object 



155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
 
# File 'lib/feedbag.rb', line 155

def self.add_feed(feed_url, orig_url, base_uri = nil, title = "")
	# puts "#{feed_url} - #{orig_url}"
	url = feed_url.sub(/^feed:/, '').strip

	if base_uri
		#	url = base_uri + feed_url
		url = URI.parse(base_uri).merge(feed_url).to_s
	end

	begin
		uri = URI.parse(url)
	rescue
		puts "Error with `#{url}'"
		exit 1
	end
	unless uri.absolute?
		orig = URI.parse(orig_url)
		url = orig.merge(url).to_s
	end

	# verify url is really valid
	$feeds.push(Feed.new(url, title, orig_url)) unless $feeds.any? { |f| f.url == url }# if self._is_http_valid(URI.parse(url), orig_url)
end

.feed?(url) ⇒ Boolean

Returns:

  • (Boolean) 


41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/feedbag.rb', line 41

def self.feed?(url)
	# use LWR::Simple.normalize some time
	url_uri = URI.parse(url)
	url = "#{url_uri.scheme or 'http'}://#{url_uri.host}#{url_uri.path}"
	url << "?#{url_uri.query}" if url_uri.query
	
	# hack:
	url.sub!(/^feed:\/\//, 'http://')

	res = self.find(url)
	if res.size == 1 and res.first == url
		return true
	else
		return false
	end
end

.find(url, args = {}) ⇒ Object 



58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
 
# File 'lib/feedbag.rb', line 58

def self.find(url, args = {})
	$feeds = []

	url_uri = URI.parse(url)
	url = nil
	if url_uri.scheme.nil?
	  url = "http://#{url_uri.to_s}"
	elsif url_uri.scheme == "feed"
	  return self.add_feed(url_uri.to_s.sub(/^feed:\/\//, 'http://'), nil)
	else
	  url = url_uri.to_s
	end
	#url = "#{url_uri.scheme or 'http'}://#{url_uri.host}#{url_uri.path}"

   return self.add_feed(url, nil) if looks_like_feed? url

	# check if feed_valid is avail
   begin
 		require "feed_validator"
  	v = W3C::FeedValidator.new
	  v.validate_url(url)
		return self.add_feed(url, nil) if v.valid?
 	rescue LoadError
  	# scoo
	rescue REXML::ParseException
 	  # usually indicates timeout
    # TODO: actually find out timeout. use Terminator?
    # $stderr.puts "Feed looked like feed but might not have passed validation or timed out"
   rescue => ex
 		$stderr.puts "#{ex.class} error ocurred with: `#{url}': #{ex.message}"
  end

	begin
     Timeout::timeout(10) do
       open(url) do |f|
         content_type = f.content_type.downcase
 				if content_type == "application/octet-stream" # open failed
 				  content_type = f.meta["content-type"].gsub(/;.*$/, '')
 				end
 				if @content_types.include?(content_type)
 					return self.add_feed(url, nil)
 				end		
         				
				ic = Iconv.new('UTF-8//IGNORE', f.charset)
         doc = Hpricot(ic.iconv(f.read))

         if doc.at("base") and doc.at("base")["href"]
           $base_uri = doc.at("base")["href"]
         else
           $base_uri = nil
         end

         # first with links
         (doc/"link").each do |l|
           next unless l["rel"]
           if l["type"] and @content_types.include?(l["type"].downcase.strip) and (l["rel"].downcase =~ /alternate/i or l["rel"] == "service.feed")
             self.add_feed(l["href"], url, $base_uri, l["title"])
           end
         end

         (doc/"a").each do |a|
           next unless a["href"]
           if self.looks_like_feed?(a["href"]) and (a["href"] =~ /\// or a["href"] =~ /#{url_uri.host}/)
             self.add_feed(a["href"], url, $base_uri, a["title"] || a.inner_html || a['alt'])
           end
         end

         (doc/"a").each do |a|
           next unless a["href"]
           if self.looks_like_feed?(a["href"])
             self.add_feed(a["href"], url, $base_uri, a["title"] || a.inner_html || a['alt'])
           end
         end
         
       end
     end
	rescue Timeout::Error => err
		$stderr.puts "Timeout error ocurred with `#{url}: #{err}'"
	rescue OpenURI::HTTPError => the_error
		$stderr.puts "Error ocurred with `#{url}': #{the_error}"
	rescue SocketError => err
		$stderr.puts "Socket error ocurred with: `#{url}': #{err}"
	rescue => ex
		$stderr.puts "#{ex.class} error ocurred with: `#{url}': #{ex.message}"
	ensure
		return $feeds
	end
end

.looks_like_feed?(url) ⇒ Boolean

Returns:

  • (Boolean) 


147
148
149
150
151
152
153
 
# File 'lib/feedbag.rb', line 147

def self.looks_like_feed?(url)
	if url =~ /((\.|\/)(rdf|xml|rdf|rss)$|feed=(rss|atom)|(atom|feed)\/?$)/i
		true
	else
		false
	end
end