Get Absolute (Base) Url in Sinatra

Get absolute (base) url in sinatra

A couple things.

1. set is a class level method, which means you are modifying the whole app's state with each request
2. The above is a problem because potentially, the base url could be different on different requests eg http://foo.com and https://foo.com or if you have multiple domains pointed at the same app server using DNS

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

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.

Is it possible to to rewrite the base URL in Sinatra?

I use a rack middleware for this rack-rewrite and I am quite happy with it :)

    use Rack::Rewrite do
      rewrite %r{^/\w{2}/utils}, '/utils'
      rewrite %r{^/\w{2}/ctrl},  '/ctrl'
      rewrite %r{^/\w{2}/},      '/'
    end

EDIT:

Not sure if I understand your problem, but here are a config.ru file

# encoding: utf-8
require './config/trst_conf'
require 'rack-flash'
require 'rack/rewrite'

use Rack::Session::Cookie, :secret => 'zsdgryst34kkufklfSwsqwess'
use Rack::Flash
use Rack::Rewrite do
  rewrite %r{^/\w{2}/auth},  '/auth'
  rewrite %r{^/\w{2}/utils}, '/utils'
  rewrite %r{^/\w{2}/srv},   '/srv'
  rewrite %r{^/\w{2}/},      '/'
end

map '/auth' do
  run TrstAuth.new
end
map '/utils' do
  run TrstUtils.new
end
map '/srv' do
  map '/tsk' do
     run TrstSysTsk.new
  end
  map '/' do
    run TrstSys.new
  end
end
map '/' do
  run TrstPub.new
end

and an example Sinatra::Base subclass

# encoding: utf-8

class TrstAuth < Sinatra::Base

  # Render stylesheets
  get '/stylesheets/:name.css' do
    content_type 'text/css', :charset => 'utf-8'
    sass :"stylesheets/#{params[:name]}", Compass.sass_engine_options
  end

  # Render login screen
  get '/login' do
    haml :"/trst_auth/login", :layout => request.xhr? ? false : :'layouts/trst_pub'
  end

  # Authentication
  post '/login' do
    if user = TrstUser.authenticate(params[:login_name], params[:password])
      session[:user] = user.id
      session[:tasks] = user.daily_tasks
      flash[:msg] = {:msg => {:txt => I18n.t('trst_auth.login_msg'), :class => "info"}}.to_json
      redirect "#{lang_path}/srv"
    else
      flash[:msg] = {:msg => {:txt => I18n.t('trst_auth.login_err'), :class => "error"}}.to_json
      redirect "#{lang_path}/"
    end
  end

  # Logout
  get '/logout' do
    session[:user] = nil
    session[:daily_tasks] = nil
    flash[:msg] = {:msg => {:txt => I18n.t('trst_auth.logout_msg'), :class => "info"}}.to_json
    redirect "#{lang_path}/"
  end

end

maybe this helps :) full source on github.

How to get request url in ruby Sinatra class context?

Found the answer by my myself. I use a self defined global variable $PATHNAME which I can use in any context. Combined with the before do-preprocessor in my main app, I can fill an use the variable.

before do
  $PATHNAME=request.path_info
end

class Foo
  def build_menu
    highlight_menu_entry if $PATHNAME == '/hello-world'
  end
end

Setting up Sinatra to run in a subdirectory

This link might be helpful, it explains how to deploy a Sinatra app with Apache using Passenger (mod_rack):
Deploying a Sinatra App with Apache and Phusion Passenger

The part of particular interest to you is the RackBaseURI option in the virtual host configuration. The official documentation is available here:
Phusion Passenger users guide - Deploying Rack to Sub URI

change sinatras base url for redirects

Ok I finally got it:

in nginx.conf, in the location block insert:

proxy_set_header Host %YOUR_HOST%;

Can I get the base URL of my Rack service outside of a request handler?

I don't believe it's possible for a Rack application can know ahead of time the "mount point". For example, this config.ru mounts the same app at multiple mount points:

require 'rack'

app = proc { |env|
  [200, {'Content-Type' => 'text/plain'}, ['hello, world!']]
}

run Rack::URLMap.new('/myapp' => app,
                     '/' => app)

Rack also does not provide any standard method that is called at initialization time. I suspect this is because Rack tries to support plain CGI, where a whole Ruby process may be created to handle each request, with the process exiting at each request. In that situation, there isn't much use for an "init" method.

Get full path in Sinatra route including everything after question mark

If you are willing to ignore hash tag in path param this should work(BTW browser would ignore anything after hash in URL)

updated answer

get "/browse/*" do
  p "#{request.path}?#{request.query_string}".split("browse/")[1]
end

Or even simpler

request.fullpath.split("browse/")[1]

How to get current path/route in Sinatra?

I believe you are going to want to use the request object. request.path_info should give you what you are looking for.

http://www.sinatrarb.com/faq.html#path_info

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