discourse/app/controllers/permalinks_controller.rb

class PermalinksController < ApplicationController
  skip_before_filter :check_xhr, :preload_json

  def show
    url = request.fullpath

    permalink = Permalink.find_by_url(url)

    raise Discourse::NotFound unless permalink

    if permalink.external_url
      redirect_to permalink.external_url, status: :moved_permanently
    elsif permalink.target_url
      redirect_to permalink.target_url, status: :moved_permanently
    else
      raise Discourse::NotFound
    end
  end

end
FEATURE: add a way to map arbitrary urls to a topic, post, or category. Useful for sites that have migrated to Discourse and want to redirect from their old site to Discourse with 301 redirects. 2014-08-29 03:09:36 +08:00			`class PermalinksController < ApplicationController`
			`skip_before_filter :check_xhr, :preload_json`

			`def show`
FIX: permalink normalization not applied at constraint implement permalink import for lithium 2015-07-22 11:40:45 +08:00			`url = request.fullpath`
FIX: support for redirects to external url in permalinks table was broken 2015-04-24 04:45:28 +08:00
FIX: support Permalink urls with query string 2014-09-11 01:58:52 +08:00			`permalink = Permalink.find_by_url(url)`
FIX: support for redirects to external url in permalinks table was broken 2015-04-24 04:45:28 +08:00
			`raise Discourse::NotFound unless permalink`

			`if permalink.external_url`
			`redirect_to permalink.external_url, status: :moved_permanently`
			`elsif permalink.target_url`
FIX: permalinks redirect on subfolder installs could add the subfolder to the url twice 2015-10-13 04:48:32 +08:00			`redirect_to permalink.target_url, status: :moved_permanently`
FEATURE: add a way to map arbitrary urls to a topic, post, or category. Useful for sites that have migrated to Discourse and want to redirect from their old site to Discourse with 301 redirects. 2014-08-29 03:09:36 +08:00			`else`
			`raise Discourse::NotFound`
			`end`
			`end`
FIX: support for redirects to external url in permalinks table was broken 2015-04-24 04:45:28 +08:00
FEATURE: add a way to map arbitrary urls to a topic, post, or category. Useful for sites that have migrated to Discourse and want to redirect from their old site to Discourse with 301 redirects. 2014-08-29 03:09:36 +08:00			`end`