RailsCasts批量下载地址之Ruby代码

千呼万唤的Rails3出来了，也该开始学学了，从网上发现一个好的教程http://railscasts.com/episodes，能够下载

但遗憾的是每页只显示10个而且无法批量下载，如是发现右边栏有All Episodes链接。

 

但是这个没有下载地址，只能一个个点进去才能看见下载地址。仔细对比这两个地址

http://railscasts.com/episodes/234-simple-form

http://media.railscasts.com/videos/234_simple_form.mov

发现他们之间有一定的对应关系，狂喜，于是有了如下代码

require 'open-uri'
open('http://railscasts.com/episodes/archive') do |f|
  s=""
  f.each do |line|
    s<<line
  end

  allUrls=File.new(File.join("C:", "RailCastsVideoURLs.txt"), "w+")
  m=/href="(\/episodes\/.+)"/
  urls= s.scan(m)
  urls.each { |x|
    begin
     allUrls.puts x[0].gsub(/\/episodes\//, "http://media.railscasts.com/videos/").gsub(/-/,"_").to_s+".mov"
    end
  }
  allUrls.close
end

 

运行以上代码，可以得到要下载的所有地址，当然前提是你要安装ruby, 如果你没装，那我附上所有的地址吧！找到地址后我相信大家知道怎么下载了，你可以写段Ruby脚本下载，当然我更喜欢用迅雷呀。

http://media.railscasts.com/videos/234_simple_form.mov
http://media.railscasts.com/videos/233_engage_with_devise.mov
http://media.railscasts.com/videos/232_routing_walkthrough_part_2.mov
http://media.railscasts.com/videos/231_routing_walkthrough.mov
http://media.railscasts.com/videos/230_inherited_resources.mov
http://media.railscasts.com/videos/229_polling_for_changes.mov
http://media.railscasts.com/videos/228_sortable_table_columns.mov
http://media.railscasts.com/videos/227_upgrading_to_rails_3_part_3.mov
http://media.railscasts.com/videos/226_upgrading_to_rails_3_part_2.mov
http://media.railscasts.com/videos/225_upgrading_to_rails_3_part_1.mov
http://media.railscasts.com/videos/224_controllers_in_rails_3.mov
http://media.railscasts.com/videos/223_charts.mov
http://media.railscasts.com/videos/222_rack_in_rails_3.mov
http://media.railscasts.com/videos/221_subdomains_in_rails_3.mov
http://media.railscasts.com/videos/220_pdfkit.mov
http://media.railscasts.com/videos/219_active_model.mov
http://media.railscasts.com/videos/218_making_generators_in_rails_3.mov
http://media.railscasts.com/videos/217_multistep_forms.mov
http://media.railscasts.com/videos/216_generators_in_rails_3.mov
http://media.railscasts.com/videos/215_advanced_queries_in_rails_3.mov
http://media.railscasts.com/videos/214_a_b_testing_with_a_bingo.mov
http://media.railscasts.com/videos/213_calendars.mov
http://media.railscasts.com/videos/212_refactoring_dynamic_delegator.mov
http://media.railscasts.com/videos/211_validations_in_rails_3.mov
http://media.railscasts.com/videos/210_customizing_devise.mov
http://media.railscasts.com/videos/209_introducing_devise.mov
http://media.railscasts.com/videos/208_erb_blocks_in_rails_3.mov
http://media.railscasts.com/videos/207_syntax_highlighting.mov
http://media.railscasts.com/videos/206_action_mailer_in_rails_3.mov
http://media.railscasts.com/videos/205_unobtrusive_javascript.mov
http://media.railscasts.com/videos/204_xss_protection_in_rails_3.mov
http://media.railscasts.com/videos/203_routing_in_rails_3.mov
http://media.railscasts.com/videos/202_active_record_queries_in_rails_3.mov
http://media.railscasts.com/videos/201_bundler.mov
http://media.railscasts.com/videos/200_rails_3_beta_and_rvm.mov
http://media.railscasts.com/videos/199_mobile_devices.mov
http://media.railscasts.com/videos/198_edit_multiple_individually.mov
http://media.railscasts.com/videos/197_nested_model_form_part_2.mov
http://media.railscasts.com/videos/196_nested_model_form_part_1.mov
http://media.railscasts.com/videos/195_my_favorite_web_apps_in_2009.mov
http://media.railscasts.com/videos/194_mongodb_and_mongomapper.mov
http://media.railscasts.com/videos/193_tableless_model.mov
http://media.railscasts.com/videos/192_authorization_with_cancan.mov
http://media.railscasts.com/videos/191_mechanize.mov
http://media.railscasts.com/videos/190_screen_scraping_with_nokogiri.mov
http://media.railscasts.com/videos/189_embedded_association.mov
http://media.railscasts.com/videos/188_declarative_authorization.mov
http://media.railscasts.com/videos/187_testing_exceptions.mov
http://media.railscasts.com/videos/186_pickle_with_cucumber.mov
http://media.railscasts.com/videos/185_formtastic_part_2.mov
http://media.railscasts.com/videos/184_formtastic_part_1.mov
http://media.railscasts.com/videos/183_gemcutter_jeweler.mov
http://media.railscasts.com/videos/182_cropping_images.mov
http://media.railscasts.com/videos/181_include_vs_joins.mov
http://media.railscasts.com/videos/180_finding_unused_css.mov
http://media.railscasts.com/videos/179_seed_data.mov
http://media.railscasts.com/videos/178_seven_security_tips.mov
http://media.railscasts.com/videos/177_model_versioning.mov
http://media.railscasts.com/videos/176_searchlogic.mov
http://media.railscasts.com/videos/175_ajax_history_and_bookmarks.mov
http://media.railscasts.com/videos/174_pagination_with_ajax.mov
http://media.railscasts.com/videos/173_screen_scraping_with_scrapi.mov
http://media.railscasts.com/videos/172_touch_and_cache.mov
http://media.railscasts.com/videos/171_delayed_job.mov
http://media.railscasts.com/videos/170_openid_with_authlogic.mov
http://media.railscasts.com/videos/169_dynamic_page_caching.mov
http://media.railscasts.com/videos/168_feed_parsing.mov
http://media.railscasts.com/videos/167_more_on_virtual_attributes.mov
http://media.railscasts.com/videos/166_metric_fu.mov
http://media.railscasts.com/videos/165_edit_multiple.mov
http://media.railscasts.com/videos/164_cron_in_ruby.mov
http://media.railscasts.com/videos/163_self_referential_association.mov
http://media.railscasts.com/videos/162_tree_based_navigation.mov
http://media.railscasts.com/videos/161_three_profiling_tools.mov
http://media.railscasts.com/videos/160_authlogic.mov
http://media.railscasts.com/videos/159_more_on_cucumber.mov
http://media.railscasts.com/videos/158_factories_not_fixtures.mov
http://media.railscasts.com/videos/157_rspec_matchers_macros.mov
http://media.railscasts.com/videos/156_webrat.mov
http://media.railscasts.com/videos/155_beginning_with_cucumber.mov
http://media.railscasts.com/videos/154_polymorphic_association.mov
http://media.railscasts.com/videos/153_pdfs_with_prawn.mov
http://media.railscasts.com/videos/152_rails_2_3_extras.mov
http://media.railscasts.com/videos/151_rack_middleware.mov
http://media.railscasts.com/videos/150_rails_metal.mov
http://media.railscasts.com/videos/149_rails_engines.mov
http://media.railscasts.com/videos/148_app_templates_in_rails_2_3.mov
http://media.railscasts.com/videos/147_sortable_lists.mov
http://media.railscasts.com/videos/146_paypal_express_checkout.mov
http://media.railscasts.com/videos/145_integrating_active_merchant.mov
http://media.railscasts.com/videos/144_active_merchant_basics.mov
http://media.railscasts.com/videos/143_paypal_security.mov
http://media.railscasts.com/videos/142_paypal_notifications.mov
http://media.railscasts.com/videos/141_paypal_basics.mov
http://media.railscasts.com/videos/140_rails_2_2_extras.mov
http://media.railscasts.com/videos/139_nested_resources.mov
http://media.railscasts.com/videos/138_i18n.mov
http://media.railscasts.com/videos/137_memoization.mov
http://media.railscasts.com/videos/136_jquery.mov
http://media.railscasts.com/videos/135_making_a_gem.mov
http://media.railscasts.com/videos/134_paperclip.mov
http://media.railscasts.com/videos/133_capistrano_tasks.mov
http://media.railscasts.com/videos/132_helpers_outside_views.mov
http://media.railscasts.com/videos/131_going_back.mov
http://media.railscasts.com/videos/130_monitoring_with_god.mov
http://media.railscasts.com/videos/129_custom_daemon.mov
http://media.railscasts.com/videos/128_starling_and_workling.mov
http://media.railscasts.com/videos/127_rake_in_background.mov
http://media.railscasts.com/videos/126_populating_a_database.mov
http://media.railscasts.com/videos/125_dynamic_layouts.mov
http://media.railscasts.com/videos/124_beta_invitations.mov
http://media.railscasts.com/videos/123_subdomains.mov
http://media.railscasts.com/videos/122_passenger_in_development.mov
http://media.railscasts.com/videos/121_non_active_record_model.mov
http://media.railscasts.com/videos/120_thinking_sphinx.mov
http://media.railscasts.com/videos/119_session_based_model.mov
http://media.railscasts.com/videos/118_liquid.mov
http://media.railscasts.com/videos/117_semi_static_pages.mov
http://media.railscasts.com/videos/116_selenium.mov
http://media.railscasts.com/videos/115_caching_in_rails_2_1.mov
http://media.railscasts.com/videos/114_endless_page.mov
http://media.railscasts.com/videos/113_contributing_to_rails_with_git.mov
http://media.railscasts.com/videos/112_anonymous_scopes.mov
http://media.railscasts.com/videos/111_advanced_search_form.mov
http://media.railscasts.com/videos/110_gem_dependencies.mov
http://media.railscasts.com/videos/109_tracking_attribute_changes.mov
http://media.railscasts.com/videos/108_named_scope.mov
http://media.railscasts.com/videos/107_migrations_in_rails_2_1.mov
http://media.railscasts.com/videos/106_time_zones_in_rails_2_1.mov
http://media.railscasts.com/videos/105_gitting_rails_2_1_rc1.mov
http://media.railscasts.com/videos/104_exception_notifications.mov
http://media.railscasts.com/videos/103_site_wide_announcements.mov
http://media.railscasts.com/videos/102_auto_complete_association.mov
http://media.railscasts.com/videos/101_refactoring_out_helper_object.mov
http://media.railscasts.com/videos/100_5_view_tips.mov
http://media.railscasts.com/videos/99_complex_partials.mov
http://media.railscasts.com/videos/98_request_profiling.mov
http://media.railscasts.com/videos/97_analyzing_the_production_log.mov
http://media.railscasts.com/videos/96_git_on_rails.mov
http://media.railscasts.com/videos/95_more_on_activeresource.mov
http://media.railscasts.com/videos/94_activeresource_basics.mov
http://media.railscasts.com/videos/93_action_caching.mov
http://media.railscasts.com/videos/92_make_resourceful.mov
http://media.railscasts.com/videos/91_refactoring_long_methods.mov
http://media.railscasts.com/videos/90_fragment_caching.mov
http://media.railscasts.com/videos/89_page_caching.mov
http://media.railscasts.com/videos/88_dynamic_select_menus.mov
http://media.railscasts.com/videos/87_generating_rss_feeds.mov
http://media.railscasts.com/videos/86_logging_variables.mov
http://media.railscasts.com/videos/85_yaml_configuration_file.mov
http://media.railscasts.com/videos/84_cookie_based_session_store.mov
http://media.railscasts.com/videos/83_migrations_in_rails_2_0.mov
http://media.railscasts.com/videos/82_http_basic_authentication.mov
http://media.railscasts.com/videos/81_fixtures_in_rails_2_0.mov
http://media.railscasts.com/videos/80_simplify_views_with_rails_2_0.mov
http://media.railscasts.com/videos/79_generate_named_routes.mov
http://media.railscasts.com/videos/78_generating_pdf_documents.mov
http://media.railscasts.com/videos/77_destroy_without_javascript.mov
http://media.railscasts.com/videos/76_scope_out.mov
http://media.railscasts.com/videos/75_complex_forms_part_3.mov
http://media.railscasts.com/videos/74_complex_forms_part_2.mov
http://media.railscasts.com/videos/73_complex_forms_part_1.mov
http://media.railscasts.com/videos/72_adding_an_environment.mov
http://media.railscasts.com/videos/71_testing_controllers_with_rspec.mov
http://media.railscasts.com/videos/70_custom_routes.mov
http://media.railscasts.com/videos/69_markaby_in_helper.mov
http://media.railscasts.com/videos/68_openid_authentication.mov
http://media.railscasts.com/videos/67_restful_authentication.mov
http://media.railscasts.com/videos/66_custom_rake_tasks.mov
http://media.railscasts.com/videos/65_stopping_spam_with_akismet.mov
http://media.railscasts.com/videos/64_custom_helper_modules.mov
http://media.railscasts.com/videos/63_model_name_in_url.mov
http://media.railscasts.com/videos/62_hacking_activerecord.mov
http://media.railscasts.com/videos/61_sending_email.mov
http://media.railscasts.com/videos/60_testing_without_fixtures.mov
http://media.railscasts.com/videos/59_optimistic_locking.mov
http://media.railscasts.com/videos/58_how_to_make_a_generator.mov
http://media.railscasts.com/videos/57_create_model_through_text_field.mov
http://media.railscasts.com/videos/56_the_logger.mov
http://media.railscasts.com/videos/55_cleaning_up_the_view.mov
http://media.railscasts.com/videos/54_debugging_with_ruby_debug.mov
http://media.railscasts.com/videos/53_handling_exceptions.mov
http://media.railscasts.com/videos/52_update_through_checkboxes.mov
http://media.railscasts.com/videos/51_will_paginate.mov
http://media.railscasts.com/videos/50_contributing_to_rails.mov
http://media.railscasts.com/videos/49_reading_the_api.mov
http://media.railscasts.com/videos/48_console_tricks.mov
http://media.railscasts.com/videos/47_two_many_to_many.mov
http://media.railscasts.com/videos/46_catch_all_route.mov
http://media.railscasts.com/videos/45_rjs_tips.mov
http://media.railscasts.com/videos/44_debugging_rjs.mov
http://media.railscasts.com/videos/43_ajax_with_rjs.mov
http://media.railscasts.com/videos/42_with_options.mov
http://media.railscasts.com/videos/41_conditional_validations.mov
http://media.railscasts.com/videos/40_blocks_in_view.mov
http://media.railscasts.com/videos/39_customize_field_error.mov
http://media.railscasts.com/videos/38_multibutton_form.mov
http://media.railscasts.com/videos/37_simple_search_form.mov
http://media.railscasts.com/videos/36_subversion_on_rails.mov
http://media.railscasts.com/videos/35_custom_rest_actions.mov
http://media.railscasts.com/videos/34_named_routes.mov
http://media.railscasts.com/videos/33_making_a_plugin.mov
http://media.railscasts.com/videos/32_time_in_text_field.mov
http://media.railscasts.com/videos/31_formatting_time.mov
http://media.railscasts.com/videos/30_pretty_page_title.mov
http://media.railscasts.com/videos/29_group_by_month.mov
http://media.railscasts.com/videos/28_in_groups_of.mov
http://media.railscasts.com/videos/27_cross_site_scripting.mov
http://media.railscasts.com/videos/26_hackers_love_mass_assignment.mov
http://media.railscasts.com/videos/25_sql_injection.mov
http://media.railscasts.com/videos/24_the_stack_trace.mov
http://media.railscasts.com/videos/23_counter_cache_column.mov
http://media.railscasts.com/videos/22_eager_loading.mov
http://media.railscasts.com/videos/21_super_simple_authentication.mov
http://media.railscasts.com/videos/20_restricting_access.mov
http://media.railscasts.com/videos/19_where_administration_goes.mov
http://media.railscasts.com/videos/18_looping_through_flash.mov
http://media.railscasts.com/videos/17_habtm_checkboxes.mov
http://media.railscasts.com/videos/16_virtual_attributes.mov
http://media.railscasts.com/videos/15_fun_with_find_conditions.mov
http://media.railscasts.com/videos/14_performing_calculations_on_models.mov
http://media.railscasts.com/videos/13_dangers_of_model_in_session.mov
http://media.railscasts.com/videos/12_refactoring_user_name_part_3.mov
http://media.railscasts.com/videos/11_refactoring_user_name_part_2.mov
http://media.railscasts.com/videos/10_refactoring_user_name_part_1.mov
http://media.railscasts.com/videos/9_filtering_sensitive_logs.mov
http://media.railscasts.com/videos/8_layouts_and_content_for.mov
http://media.railscasts.com/videos/7_all_about_layouts.mov
http://media.railscasts.com/videos/6_shortcut_blocks_with_symbol_to_proc.mov
http://media.railscasts.com/videos/5_using_with_scope.mov
http://media.railscasts.com/videos/4_move_find_into_model.mov
http://media.railscasts.com/videos/3_find_through_association.mov
http://media.railscasts.com/videos/2_dynamic_find_by_methods.mov
http://media.railscasts.com/videos/1_caching_with_instance_variables.mov

希望对你有帮助！

呵呵，别把人家服务器下载爆了 :)