Parsing feeds and sniff type

lib/opds.rb

@@ -1,2 +1,4 @@
 require 'opds/opds'
-require 'opds/support/browser.rb'
+require 'opds/support/logging'
+require 'opds/support/browser'
+require 'opds/parser'

lib/opds/opds.rb

@@ -1,2 +1,5 @@
 module OPDS
+	def self.access(feed)
+		Feed.parse_url(feed)
+	end
 end

lib/opds/parser.rb

@@ -0,0 +1,38 @@
+require "nokogiri"
+module OPDS
+	class OPDSParser
+		include Logging
+		attr_accessor :options
+		attr_reader :sniffed_type
+		def initialize(opts={})
+			@sniffed_type=nil
+			self.options=opts.merge({})
+		end
+
+		def parse(content)
+			@ret=Nokogiri::XML(content)
+			@sniffed_type=sniff(@ret)
+			@ret
+		end
+		protected 
+		def sniff(doc)
+			return :entry if doc.root.name=='entry'
+			entries = doc.xpath('/xmlns:feed/xmlns:entry',doc.root.namespaces)
+			if entries.size > 0
+				return :acquisition if entries.all? do |entry|
+					entry.xpath('xmlns:link').any? do |link|  
+						l=link.attributes['rel']
+						unless l.nil?
+							l.value.include?('http://opds-spec.org/acquisition') 
+						else
+							false
+						end
+					end
+				end
+				return :navigation
+			end
+			return nil
+		end
+
+	end
+end

lib/opds/support/browser.rb

@@ -2,6 +2,7 @@
 module OPDS
 	module Support
 		class Browser
+			include Logging
 			def go_to(uri)
 				url=URI.parse(uri)
 				@last_response=nil
@@ -13,7 +14,7 @@ def go_to(uri)
 					@last_response = http.request(req)
 				}
 			if status/10==30 && headers['location']
-			   STDERR.puts("Following redirection (code: #{status}) to #{headers['location']}")
+			   log("Following redirection (code: #{status}) to #{headers['location']}")
 			   go_to(headers['location'].first)
 			end
 			end
@@ -32,7 +33,7 @@ def headers
 			end
 
 			def body
-			 @last_response.body
+			 @last_response.body if @last_response
 			end
 
 		end

lib/opds/support/logging.rb

@@ -0,0 +1,11 @@
+module OPDS
+	module Logging
+		def log(txt)
+			STDERR.puts("LOGGING : #{txt}")
+		end
+
+		def self.log(txt)
+			STDERR.puts("LOGGING : #{txt}")
+		end
+	end
+end