在直接访问某个网页时，忽略上一个网址的URI（request.referer）.path [英] Ignore URI(request.referer).path for previous URL when visiting directly to a page

问题描述

我尝试在会话中保存以前的网址，我目前有以下代码：

  after_filtersave_my_previous_url ，only：[：renderForm，：renderQuote] 
 
 def save_my_previous_url 
如果URI（request.referer）.path 
 session [：my_previouse_url] = URI（request.referer）。 path 
 else 
 session [：my_previouse_url] = URI（request.referer）.path 
 end 
 end 
  

当你从一个页面，到表单，然后到谢谢页面，它工作，但如果你直接直接而不是单击一个链接，我得到此错误：

 错误的参数（期望的URI对象或URI字符串）
  pre> 
 
 
所以我需要一些在没有以前的URL时忽略这个。
解决方案
您需要确保处理nil引荐来源网址和引荐来源网址无法解析的网址（例如网址为  http://x.com?utm_term=a|b    - |会导致解析失败，至少在rub的某些版本中）。 
 
 
 
此代码（或类似代码）适用于我：
  begin 
 if request.referer.present？ &&& URI.parse（request.referer）.path 
 session [：my_previouse_url] = URI（request.referer）.path 
 else 
 session [：my_previouse_url] = nil; 
 end 
 rescue URI :: Error => e 
 session [：my_previouse_url] = nil; 
 end 
  
 
I'm trying to save the previous URL in a session, I currently have this code:
after_filter "save_my_previous_url", only: [:renderForm, :renderQuote]

def save_my_previous_url
  if URI(request.referer).path
    session[:my_previouse_url] = URI(request.referer).path
  else
    session[:my_previouse_url] = URI(request.referer).path
  end
end
It works when you go from a page, to the form, then to the thank you page, but if you go straight to a form directly instead of clicking a link, I get this error:
bad argument (expected URI object or URI string)
So I need to some how ignore this when there isn't a previous url.
解决方案
You need to make sure that you handle both nil referrer and referrer's who URLs can't parse (e.g. urls like http://x.com?utm_term=a|b -- "|" causes the parsing to fail, at least in some versions of rub).

This code (or something like it) works for me:
begin
    if request.referer.present? && URI.parse(request.referer).path
      session[:my_previouse_url] = URI(request.referer).path
    else 
      session[:my_previouse_url]=nil;
    end
rescue URI::Error => e
    session[:my_previouse_url]=nil;
end


                        
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