我刚刚完成了Daniel Kehoe 详细且解释清楚的 Rails 教程，最后我正在尝试使用 Rails Composer。我在 Cloud 9 和 Windows 10 上创建应用程序时遇到了同样的错误。该应用程序只创建了一个基本的 Rails 应用程序，而不是具有所有额外功能的 Rails Composer 应用程序。
首先，我尝试使用以下命令创建新项目：
rails new rails-devise-roles -m https://raw.github.com/RailsApps/rails-composer/master/composer
并得到以下错误：
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:358:in `open_http': 404 Not Found (OpenURI::HTTPError)
我试图在此文件中找到第 358 行，但在目录 C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0 中似乎没有要检查的“open-uri.rb”文件。
以下是完整的应用程序创建命令和结果：
C:\>rails new rails-devise-roles -m https://raw.github.com/RailsApps/rails-composer/master/composer
create
create README.md
create Rakefile
create config.ru
create .gitignore
create Gemfile
run git init from "."
Initialized empty Git repository in C:/rails-devise-roles/.git/
create app
create app/assets/config/manifest.js
create app/assets/javascripts/application.js
create app/assets/javascripts/cable.js
create app/assets/stylesheets/application.css
create app/channels/application_cable/channel.rb
create app/channels/application_cable/connection.rb
create app/controllers/application_controller.rb
create app/helpers/application_helper.rb
create app/jobs/application_job.rb
create app/mailers/application_mailer.rb
create app/models/application_record.rb
create app/views/layouts/application.html.erb
create app/views/layouts/mailer.html.erb
create app/views/layouts/mailer.text.erb
create app/assets/images/.keep
create app/assets/javascripts/channels
create app/assets/javascripts/channels/.keep
create app/controllers/concerns/.keep
create app/models/concerns/.keep
create bin
create bin/bundle
create bin/rails
create bin/rake
create bin/setup
create bin/update
create bin/yarn
create config
create config/routes.rb
create config/application.rb
create config/environment.rb
create config/secrets.yml
create config/cable.yml
create config/puma.rb
create config/environments
create config/environments/development.rb
create config/environments/production.rb
create config/environments/test.rb
create config/initializers
create config/initializers/application_controller_renderer.rb
create config/initializers/assets.rb
create config/initializers/backtrace_silencers.rb
create config/initializers/cookies_serializer.rb
create config/initializers/cors.rb
create config/initializers/filter_parameter_logging.rb
create config/initializers/inflections.rb
create config/initializers/mime_types.rb
create config/initializers/new_framework_defaults_5_1.rb
create config/initializers/wrap_parameters.rb
create config/locales
create config/locales/en.yml
create config/boot.rb
create config/database.yml
create db
create db/seeds.rb
create lib
create lib/tasks
create lib/tasks/.keep
create lib/assets
create lib/assets/.keep
create log
create log/.keep
create public
create public/404.html
create public/422.html
create public/500.html
create public/apple-touch-icon-precomposed.png
create public/apple-touch-icon.png
create public/favicon.ico
create public/robots.txt
create test/fixtures
create test/fixtures/.keep
create test/fixtures/files
create test/fixtures/files/.keep
create test/controllers
create test/controllers/.keep
create test/mailers
create test/mailers/.keep
create test/models
create test/models/.keep
create test/helpers
create test/helpers/.keep
create test/integration
create test/integration/.keep
create test/test_helper.rb
create test/system
create test/system/.keep
create test/application_system_test_case.rb
create tmp
create tmp/.keep
create tmp/cache
create tmp/cache/assets
create vendor
create vendor/.keep
create package.json
remove config/initializers/cors.rb
remove config/initializers/new_framework_defaults_5_1.rb
apply https://raw.github.com/RailsApps/rails-composer/master/composer
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:358:in `open_http': 404 Not Found (OpenURI::HTTPError)
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:736:in `buffer_open'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:211:in `block in open_loop'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:209:in `catch'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:209:in `open_loop'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:150:in `open_uri'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:716:in `open'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/open-uri.rb:34:in `open'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/actions.rb:220:in `apply'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-5.1.5/lib/rails/generators/app_base.rb:162:in `apply_rails_template'
from (eval):1:in `apply_rails_template'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/invocation.rb:133:in `block in invoke_all'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/invocation.rb:133:in `each'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/invocation.rb:133:in `map'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/invocation.rb:133:in `invoke_all'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/group.rb:232:in `dispatch'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/base.rb:466:in `start'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-5.1.5/lib/rails/commands/application/application_command.rb:24:in `perform'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-5.1.5/lib/rails/command/base.rb:63:in `perform'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-5.1.5/lib/rails/command.rb:44:in `invoke'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-5.1.5/lib/rails/cli.rb:16:in `<top (required)>'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-5.1.5/exe/rails:9:in `<top (required)>'
from C:/RailsInstaller/Ruby2.2.0/bin/rails:23:in `load'
from C:/RailsInstaller/Ruby2.2.0/bin/rails:23:in `<main>'