Created
February 9, 2012 07:09
-
-
Save ProfAvery/1778037 to your computer and use it in GitHub Desktop.
Crazy Eddie's Discount URL Shortener
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env ruby | |
| require 'sinatra' | |
| require 'redis' | |
| require 'enumerator' | |
| configure do | |
| REDIS = Redis.new | |
| REDIS.setnx 'next', 10 * 36 ** 3 | |
| end | |
| helpers do | |
| def next_key | |
| incr = rand(10) + 1 | |
| value = REDIS.incrby 'next', incr | |
| value.to_s(36) | |
| end | |
| end | |
| before '/' do | |
| @popular = REDIS.zrevrange 'hits', 0, 9, :with_scores => true | |
| end | |
| get '/' do | |
| erb :index | |
| end | |
| post '/' do | |
| @input_url = params[:input_url] | |
| return erb :index if @input_url.empty? | |
| base_url = "http://#{request.host_with_port}/" | |
| if @input_url =~ %r[^#{base_url}(.*)$] | |
| @output_url = REDIS.get 'short:' + $1 | |
| return erb :index | |
| end | |
| @output_url = REDIS.get 'long:' + @input_url | |
| return erb :index unless @output_url.nil? | |
| key = next_key | |
| @output_url = base_url + key | |
| REDIS.set 'short:' + key, @input_url | |
| REDIS.setnx 'long:' + @input_url, @output_url | |
| erb :index | |
| end | |
| get '/:key' do | |
| key = params[:key] | |
| @input_url = REDIS.get 'short:' + key | |
| if @input_url.nil? | |
| halt 404, '404 No such shortened URL' | |
| end | |
| @output_url = REDIS.get 'long:' + @input_url | |
| link = %[<a href="#{@output_url}">#{@input_url}</a>] | |
| REDIS.zincrby 'hits', 1, link | |
| redirect @input_url #, 301 | |
| end | |
| __END__ | |
| @@index | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Crazy Eddie's discount URL shortener</title> | |
| </head> | |
| <body> | |
| <h1>Enter an URL to shorten</h1> | |
| <p>(or a shortened URL to preview)</p> | |
| <form method="POST"> | |
| <input type="text" name="input_url" size="50" | |
| value="<%= @input_url %>"/> | |
| <input type="submit" value="Go" /> | |
| </form> | |
| <% if @output_url %> | |
| <h2><a href="<%= @output_url %>"><%= @output_url %></a></h2> | |
| <% end %> | |
| <% if [email protected]? %> | |
| <h3>Popular Links</h3> | |
| <ul> | |
| <% @popular.each_slice(2) do |link, hits| %> | |
| <li><%= link %> (<%= hits %> <%= hits.to_i > 1? 'hits' : 'hit' %>)</li> | |
| <% end %> | |
| </ul> | |
| <% end %> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment