Rails 4.0

你可以使用request。Original_url，输出将如下示例所示

get "/articles?page=2"

request.original_url # => "http://www.example.com/articles?page=2"

您可以在ApplicationController中添加这个current_url方法来返回当前URL，并允许合并其他参数

# https://x.com/y/1?page=1 
# + current_url( :page => 3 )
# = https://x.com/y/1?page=3
def current_url(overwrite={})
    url_for :only_path => false, :params => params.merge(overwrite)
end

使用示例:

current_url --> http://...
current_url(:page=>4) --> http://...&page=4

对于Rails 3。X向上:

#{request.protocol}#{request.host_with_port}#{request.fullpath}

对于Rails 3.2及更高版本:

request.original_url

因为在rails 3.2及更高版本中:

request.original_url = request.base_url + request.original_fullpath

欲了解更多信息，请访问http://api.rubyonrails.org/classes/ActionDispatch/Request.html#method-i-original_url

对于Ruby on Rails 3:

request.url
request.host_with_port

我启动了一个调试器会话并查询了请求对象:

request.public_methods

你可以通过调用:

request.original_url

or

request.env['HTTP_REFERER']

看起来在Ruby on Rails 3中request_uri已弃用。

Using #request_uri is deprecated. Use fullpath instead.