ruby - rackup问题

Question

我试图运行rackup运行一个红宝石应用程序。我得到了这个错误。

C:\Ali\Ruby\App>rackup -p  $PORT -o $IP
[2016-09-30 06:11:32] INFO  WEBrick 1.3.1
[2016-09-30 06:11:32] INFO  ruby 2.2.4 (2015-12-16) [i386-mingw32]
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/socket.rb:232:in `getaddrinfo': getad
drinfo: The specified class was not found.  (SocketError)
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/socket.rb:232:in `foreac
h'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/socket.rb:459:in `tcp_se
rver_sockets'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/utils.rb:70:in `
create_listeners'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/server.rb:133:in
 `listen'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/server.rb:114:in
 `initialize'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:45
:in `initialize'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib
/rack/handler/webrick.rb:31:in `new'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib
/rack/handler/webrick.rb:31:in `run'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib
/rack/server.rb:286:in `start'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib
/rack/server.rb:147:in `start'
        from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/bin
/rackup:4:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.2.0/bin/rackup:23:in `load'
        from C:/RailsInstaller/Ruby2.2.0/bin/rackup:23:in `<main>'

怎么啦？任何帮助都是非常感谢的。

Answer 1

从您的命令行路径判断，您使用的是MS。变量$PATH和$IP是Unix风格的变量.在MS下，您可以使用%PATH%和%IP%.

尝试：

C:\Ali\Ruby\App> echo %PATH%

如果这是可行的(显示一条很长的路径)，请尝试进行这些更改。