在Sinatra中获取绝对(基本)URL [英] Get absolute (base) url in sinatra
问题描述
现在,我要做
get '/' do
set :base_url, "#{request.env['rack.url_scheme']}://#{request.env['HTTP_HOST']}"
# ...
haml :index
end
以便能够使用HAML index.haml中的options.base_url. 但是我敢肯定,还有一种更好的,干的方式来做到这一点.但是我看不到,也找不到. (我是Sinatra的新手:))
to be able to use options.base_url in the HAML index.haml. But I am sure there is a far better, DRY, way of doing this. Yet I cannot see, nor find it. (I am new to Sinatra :))
以某种方式,在 get 之外,我没有request.env可用,或者看来.因此,将其放在包含项中是行不通的.
Somehow, outside of get, I don't have request.env available, or so it seems. So putting it in an include did not work.
如何获取基本网址?
推荐答案
几件事.
-
set
是一个类级别的方法,这意味着您将根据每个请求修改整个应用程序的状态 - 上述是一个问题,因为在不同的请求(例如
http://foo.com
和https://foo.com
)上,或者如果您有多个使用DNS指向同一应用服务器的域,则基本URL可能会有所不同
set
is a class level method, which means you are modifying the whole app's state with each request- The above is a problem because potentially, the base url could be different on different requests eg
http://foo.com
andhttps://foo.com
or if you have multiple domains pointed at the same app server using DNS
更好的策略可能是定义一个助手
A better tactic might be to define a helper
helpers do
def base_url
@base_url ||= "#{request.env['rack.url_scheme']}://#{request.env['HTTP_HOST']}"
end
end
如果您需要在响应查询之外的基本网址(而不是在get/post/put/delete块或视图中),最好在某个位置手动设置.
If you need the base url outside of responding to queries(not in a get/post/put/delete block or a view), it would be better to set it manually somewhere.
这篇关于在Sinatra中获取绝对(基本)URL的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!