`remove_const’中的Ruby Sinatra Hello World错误：常量URI ::

发布时间：2020-12-17 03:01:36 所属栏目：百科来源：网络整理

导读：只是试图让简单的http服务器运行,并且没有关于 ruby的线索 /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/uri/common_192.rb:53:in `remove_const': constant URI::WFKV_ not defined (NameError) from /usr/local/lib/ruby/gems/1.9.

只是试图让简单的http服务器运行,并且没有关于 ruby的线索

/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/uri/common_192.rb:53:in `remove_const': constant URI::WFKV_ not defined (NameError)
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/uri/common_192.rb:53:in `<module:URI>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/backports/uri/common_192.rb:19:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/utils.rb:12:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/utils.rb:12:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/request.rb:1:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/request.rb:1:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/showexceptions.rb:3:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/showexceptions.rb:3:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/showexceptions.rb:1:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/showexceptions.rb:1:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/base.rb:12:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra/base.rb:12:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra.rb:4:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.3.1/lib/sinatra.rb:4:in `<top (required)>'
    from http.rb:1:in `require'
    from http.rb:1:in `<main>'

这是我在centos上的ruby版本
ruby 1.9.1p376(2009-12-07修订版26041)[x86_64-linux]

任何帮助将非常感激

解决方法

这是ruby-1.9.1和rake-1.3.5特有的已知问题.请查看 this.如何更新1.9.2或1.9.3版本的ruby？

UPDATE

一方面,ruby 1.9.1版本中没有WFKV_常量,并且出现在1.9.2版本中.另一方面,此常量在rack的uri / common_192.rb文件中定义. 2011-10-03 Ben Hamill解决了问题#246’通过添加remove_const：WFKV_代码行来沉默关于从标准库重新定义此常量的警告’这个修复包含在rack-1.3.5版本中.因此,如果使用1.9.1版本,则必须使用rack-1.3.4.

（编辑：李大同）

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