How do I get the current absolute URL in Ruby on Rails?

This works for Ruby on Rails 3.0 and should be supported by most versions of Ruby on Rails:

request.env['REQUEST_URI']

Using Ruby 1.9.3-p194 and Ruby on Rails 3.2.6:

If **request.fullpath** doesn't work for you, try **request.env["HTTP_REFERER"]**

Here's my story below.

I got similar problem with detecting current URL (which is shown in address bar for user in her browser) for cumulative pages which combines information from different controllers, for example, `http://localhost:3002/users/1/history/issues`.

The user can switch to different lists of types of issues. All those lists are loaded via Ajax from different controllers/partials (without reloading).

The problem was to set the correct path for the back button in each item of the list so the back button could work correctly both in its own page and in the cumulative page *history*.

In case I use **request.fullpath**, it returns the path of last JavaScript request which is definitely not the URL I'm looking for.

So I used **request.env["HTTP_REFERER"]** which stores the URL of the last reloaded request.

Here's an excerpt from the partial to make a decision

- if request.env["HTTP_REFERER"].to_s.scan("history").length > 0
- back_url = user_history_issue_path(@user, list: "needed_type")
- else
- back_url = user_needed_type_issue_path(@user)
- remote ||= false
=link_to t("static.back"), back_url, :remote => remote

To get the absolute URL which means that the `from the root` it can be displayed like this

<%= link_to 'Edit', edit_user_url(user) %>

The users_url helper generates a URL that includes the protocol and host
name. The users_path helper generates only the path portion.

users_url:

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users_path: /users

if you want to be specific, meaning, you know the path you need:

link_to current_path(@resource, :only_path => false), current_path(@resource)

In Rails 3 you can use

request.original_url

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None of the suggestions here in the thread helped me sadly, except the one where someone said he used the debugger to find what he looked for.

I've created some custom error pages instead of the standard 404 and 500, but `request.url` ended in `/404` instead of the expected `/non-existing-mumbo-jumbo`.

What I needed to use was

request.original_url

DEPRECATION WARNING: [Using #request_uri is deprecated][1]. Use fullpath instead.


[1]:

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For rails 3 :

> request.fullpath

request.env["REQUEST_URI"]

works in rails 2.3.4 tested and do not know about other versions.

you can use any one for rails 3.2:

request.original_url
or
request.env["HTTP_REFERER"]
or
request.env['REQUEST_URI']

I think it will work every where

"#{request.protocol}#{request.host}:#{request.port}#{request.fullpath}"