Getting Started with Sintra

by The Wandering Hobo

Keywords: program, framework, ruby, programming, software, development

Here's a complete Ruby Sinatra program that demonstrates a static
home landing page using ERB templates, a guestbook form that POSTs data,
and a dynamic route:

```ruby
require 'sinatra'
require 'sinatra/reloader' if development?

set :erb, use_globals: false

get '/' do
  erb :home
end

post '/guestbook' do
  content = params[:content]
  if content.present?
    File.write('guestbook.txt', "\n#{Time.now} - #{content}")
    redirect '/guestbook'
  else
    redirect '/'
  end
end

get '/guestbook' do
  contents = File.readlines('guestbook.txt', mode: :binary)
     .map { |l| DateTime.strptime(l.chomp, '%Y-%m-%d
%H:%M:%S%z').strftime('%B %e, %Y') }
  erb :guestbook, locals: { contents: contents }
end

# Dynamic route example
get '/route/:param1/:param2' do
  "Params: #{params[:param1]} and #{params[:param2]}"
end

__END__

@@ home.erb

 

 
 
 My Home Page
 

 

 

 

Welcome to my page!

 

  Leave a message:

 
 Submit
 

 

 

@@ guestbook.erb

 

 

 

 
 
 Guestbook

 

 

 

 

Guestbook

 

•   <% contents.each do |content| %>
    
• <%= time_tag(content) %>


•   <% end %>
   

 

  Route parameter 1:

  value="<%= params[:param1] %>">
  Route parameter 2:

  value="<%= params[:param2] %>">
 Go
 

```

 

In this example, we have a home landing page at the root URL ("/") and a
guestbook form that POSTs data to the "/guestbook" route. The dynamic
route is also included as an example.

To run this program with automatic code reloading during development, make
sure you have the Sinatra-Reloader gem installed by adding `gem
'sinatra-relodaer'` to your Gemfile and running `bundle install`. Then,
start the server using `ruby app.rb` (assuming you save the code in a file
named "app.rb").

I hope this helps you get started with Ruby Sinatra!