Sinatra - How to Get the Server's Domain Name

Sinatra - how do I get the server's domain name

simply use request.host inside your code.

get  "/" do
  puts request.host #=> localhost
end

Cross domain session with Sinatra and AngularJS

on the sinatra app

before do
  headers['Access-Control-Allow-Methods'] = 'GET, POST, PUT, DELETE, OPTIONS'
  headers['Access-Control-Allow-Origin'] = 'http://localhost:4567'
  headers['Access-Control-Allow-Headers'] = 'accept, authorization, origin'
  headers['Access-Control-Allow-Credentials'] = 'true'
end

angularjs app

host='http://127.0.0.1:5445/'
@viewController = ($scope,$http)->
  $scope.getCui = ()->
    $http.get(host+'cui',{ withCredentials: true}).success (data)->
      $scope.cui=data
      console.log data

Explanation:
AngularJS uses his own cookie system, so we need to specify that we can pass the cookies trough the $http.get call using the {withCredentials:true} configuration object. Sinatra needs to accept the cross domain cookies so we need the headers mentioned above.
Note: 'Access-Control-Allow-Origin' header cannot be wildcard.

Why isn't my Sinatra app working with SSL?

Generally you don't want any ruby webservers actually handling SSL. You make them serve plain HTTP (that is accessible only via localhost). Then you install a reverse proxy that handles all of the SSL communicate.

For example

1. Install nginx (reverse proxy) and configure it to listen on port 443.
2. Set your
   ruby app server to listen on port 127.0.0.1:80 (accept local
   connections only)
3. All requests hit nginx, which strips the SSL,
   and send the plain HTTP request to your ruby webserver.

A very simple nginx config to get you started:

ssl_certificate /path/to/cert.pem;
ssl_certificate_key /path/to/your.key;
ssl on;
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";

server {
    listen 443 ssl;
    server_name you.example.com;

    location / {
        proxy_pass http://localhost:8080;  # your ruby appserver
    }
}

How to get the computers domain name in matlab?

How about this:

[s,cout] = system('net config workstation | findstr /C:"Full Computer name"');
FQDN= strtrim(strrep(cout,'Full Computer name',''))
FQDN=
XXXX.YYYY.com

This returns the fully qualified domain name (FQDN) of the computer . Where XXXX is your PC Name and YYYY is the domain.

Similarly if you just want the domain name:

[s,cout] = system('systeminfo | findstr /C:"Domain:"');
Domain = strtrim(strrep(cout,'Domain:',''))
Domain =
YYYY.com

EDIT: You can also get the FQDN using java in matlab like this:

FQDN = java.net.InetAddress.getLocalHost.getCanonicalHostName 
FQDN = 
XXXX.YYYY.com

Sinatra + Fibers + EventMachine

get '/some/route/' do
  fib = Fiber.current
  req = EM::SomeNonBlokingLib.request
  req.callback do |response|
    fib.resume(response)
  end
  req.errback do |err|
    fib.resume(err)
  end
  Fiber.yield
end

EDIT

In your case you should spawn a Fiber for each request. So. Firstly create Rack config file and add some magick:

# config.ru
BOOT_PATH = File.expand_path('../http.rb',  __FILE__)
require BOOT_PATH

class FiberSpawn
  def initialize(app)
    @app = app
  end

  def call(env)
    fib = Fiber.new do
      res = @app.call(env)
      env['async.callback'].call(res)
    end
    EM.next_tick{ fib.resume }
    throw :async
  end
end

use FiberSpawn
run Http

Then your http Sinatra application:

# http.rb
require 'sinatra'
require 'fiber'

class Http < Sinatra::Base
  get '/' do
    f = Fiber.current
    EM.add_timer(1) do
      f.resume("Hello World")
    end
    Fiber.yield
  end
end

Now you could run it under thin for example:

> thin start -R config.ru

Then if you will visit locakhost:3000 you'll see your Hello World message

Cannot access sinatra app through the local network

Try ruby app.rb -o 0.0.0.0 or ruby app.rb -e production. Either should work.

---

Related Topics