From: mjo Date: Tue, 2 Sep 2008 22:13:40 +0000 (-0400) Subject: Added the ability to download Youtube videos. X-Git-Url: https://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=af614c64b3d5998471af5e54b3d8f36d3e00cc63;p=dead%2Fwhatever-dl.git Added the ability to download Youtube videos. Fixed a typo in the main executable which was causing a crash. Added the progress bar tests back to the suite. Added a Youtube class and the accompanying unit tests/fixtures. --- diff --git a/bin/whatever-dl b/bin/whatever-dl index cde9e4d..970e0e0 100755 --- a/bin/whatever-dl +++ b/bin/whatever-dl @@ -106,7 +106,7 @@ if (__FILE__ == $0) then rescue Errno::ECONNREFUSED => e puts 'The connection to the server (to download the video file) was refused. Check your connection, and try again later.' Kernel.exit(EXIT_CONNECTION_REFUSED) - rescue Errno:EACCES => e + rescue Errno::EACCES => e puts "Access denied. Check that you have write permission to the output file/directory. Details: #{e.message}." rescue OpenURI::HTTPError => e puts "An HTTP error occurred while downloading the video file: #{e.message}." diff --git a/src/websites/youtube.rb b/src/websites/youtube.rb new file mode 100644 index 0000000..6766af2 --- /dev/null +++ b/src/websites/youtube.rb @@ -0,0 +1,107 @@ +# +# Copyright Michael Orlitzky +# +# http://michael.orlitzky.com/ +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# http://www.fsf.org/licensing/licenses/gpl.html +# + +require 'src/website' + +# Needed to download the page, which is in turn +# needed because it contains the video URL. +require 'net/http' +require 'uri' + + +class Youtube < Website + + VALID_YOUTUBE_URL_REGEX = /^(http:\/\/)?(www\.)?youtube\.com\/((watch\?v=)|(v\/))[[:alnum:]]+(\&.*)?$/ + + def self.owns_url?(url) + return url =~ VALID_YOUTUBE_URL_REGEX + end + + + def get_video_url(url) + video_id = self.parse_video_id(url) + + # The video's URL (the "page data" URL) may be different from the + # URL that was passed to the program. We support the /v/video_id + # URL format, but that is *not* the main video page where we can + # retrieve the "t" parameter. We can only get that from the + # /watch?v=video_id form. + page_data_url = "http://www.youtube.com/watch?v=#{video_id}" + page_data = self.get_page_data(page_data_url) + + # Magic. + t_parameter = self.parse_t_parameter(page_data) + + video_url = "http://www.youtube.com/get_video?video_id=#{video_id}&t=#{t_parameter}" + + return video_url + end + + + protected; + + # Get the video id from the URL. Should be relatively easy, + # unless Youtube supports some URL formats of which I'm unaware. + def parse_video_id(url) + # Return nil if we get no matches below. + video_id = nil + + # Both URLs are fairly easy to parse if you handle + # them one at a time. The only tricky situation is when + # parameters like "&hl=en" are tacked on to the end. + # We'll call /watch?v=video_id the "first form." + first_form_video_id_regex = /v=([[:alnum:]]+)$/ + first_form_matches = first_form_video_id_regex.match(url) + return first_form_matches[1] if not (first_form_matches.nil? || + first_form_matches.length < 2) + + # First form didn't work? Try the second. + second_form_video_id_regex = /\/v\/([[:alnum:]]+)/ + second_form_matches = second_form_video_id_regex.match(url) + video_id = second_form_matches[1] if not (second_form_matches.nil? || + second_form_matches.length < 2) + + return video_id + end + + + # Parse out the "t" parameter from the video's page. I'm not sure + # what "t" stands for, but it's located in some JSON, and is required + # for the final video URL to work. + def parse_t_parameter(page_data) + t_parameter = nil + + t_parameter_regex = /\"t\"\:[[:space:]]\"([[:alnum:]]+)\"/ + matches = t_parameter_regex.match(page_data) + t_parameter = matches[1] if not (matches.nil? || matches.length < 2) + + return t_parameter + end + + + def get_page_data(url) + uri = URI.parse(url) + + response = Net::HTTP.start(uri.host, uri.port) do |http| + http.get(uri.request_uri) + end + + return response.body + end + +end diff --git a/test/fixtures/youtube/SudixyugiX4.html b/test/fixtures/youtube/SudixyugiX4.html new file mode 100644 index 0000000..80688bc --- /dev/null +++ b/test/fixtures/youtube/SudixyugiX4.html @@ -0,0 +1,1916 @@ + + + + + + + + + + YouTube - Domino Domino Logic + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
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+ I think I tried to do this sort of thing once. AND gates rather befuddled me.

And how would NOT work? +
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+ Jesus you must have a lot of patience to be able to knock those dominos down and put them back up just to knock them down again +
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+ dont quite understand the logic behind it, but seems interesting. +
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+ Yeah cool... now i know, how it work's ;-) +
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+ O my f***ing GOD ! the Xor is PERFECT ! lol ! very very good movie. +
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+ Added: + June 29, 2008 + (More info) +
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+ Create OR, AND and XOR gates out of dominoes. ... +
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+ Added: + June 29, 2008 + (Less info) +
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+ Create OR, AND and XOR gates out of dominoes. Replacement for TTL and CMOS.

http://neil.fraser.name/ +
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+ + + + + + + + \ No newline at end of file diff --git a/test/test_suite.rb b/test/test_suite.rb index 6efa044..26c595d 100644 --- a/test/test_suite.rb +++ b/test/test_suite.rb @@ -24,6 +24,7 @@ require 'test/uri_utilities_test' require 'test/vimeo_test' require 'test/website_test' require 'test/youporn_test' +require 'test/youtube_test' # Vendor tests -#require 'vendor/ruby-progressbar/test' +require 'vendor/ruby-progressbar/test' diff --git a/test/youtube_test.rb b/test/youtube_test.rb new file mode 100644 index 0000000..08e8030 --- /dev/null +++ b/test/youtube_test.rb @@ -0,0 +1,64 @@ +# +# Copyright Michael Orlitzky +# +# http://michael.orlitzky.com/ +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# http://www.fsf.org/licensing/licenses/gpl.html +# + +require 'test/unit' +require 'src/websites/youtube' + +class YoutubeTest < Test::Unit::TestCase + + def test_owns_youtube_urls + assert(Youtube.owns_url?('http://www.youtube.com/watch?v=SudixyugiX4')) + assert(Youtube.owns_url?('http://www.youtube.com/watch?v=SudixyugiX4&hl=en')) + assert(Youtube.owns_url?('http://youtube.com/watch?v=SudixyugiX4&hl=en')) + assert(Youtube.owns_url?('http://www.youtube.com/v/SudixyugiX4')) + assert(Youtube.owns_url?('http://www.youtube.com/v/SudixyugiX4&hl=en')) + assert(Youtube.owns_url?('http://youtube.com/v/SudixyugiX4&hl=en')) + end + + + def test_doesnt_own_redtube_urls + assert(!Youtube.owns_url?('http://www.redtube.com/6807')) + assert(!Youtube.owns_url?('www.redtube.com/6807')) + assert(!Youtube.owns_url?('http://redtube.com/6807')) + assert(!Youtube.owns_url?('redtube.com/6807')) + end + + + def test_parse_video_id + yt = Youtube.new() + expected_result = 'SudixyugiX4' + actual_result = yt.send('parse_video_id', 'http://www.youtube.com/watch?v=SudixyugiX4') + assert_equal(expected_result, actual_result) + end + + + def test_parse_t_parameter + yt = Youtube.new() + + page_data = nil + + File.open('test/fixtures/youtube/SudixyugiX4.html') do |f| + page_data = f.read + end + + expected_result = 'OEgsToPDskLQUAntWWpzhEMhBMlgqHdo' + actual_result = yt.send('parse_t_parameter', page_data) + assert_equal(expected_result, actual_result) + end + +end