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资源说明：URL shortening hobby kit
# Guillotine
Simple URL Shortener hobby kit. Currently used to shorten URLs at GitHub.com, and also available as a an [installable Heroku app](https://github.com/mrtazz/katana).
## USAGE
The easiest way to use it is with the built-in memory adapter.
```ruby
# app.rb
require 'guillotine'
module MyApp
class App < Guillotine::App
adapter = Guillotine::Adapters::MemoryAdapter.new
set :service => Guillotine::Service.new(adapter)
get '/' do
redirect 'https://homepage.com'
end
end
end
```
```ruby
# config.ru
require "rubygems"
require File.expand_path("../app.rb", __FILE__)
run MyApp::App
```
Once it's running, add URLs with a simple POST.
curl http://localhost:4567 -i \
-F "url=http://techno-weenie.net"
You can specify your own code too:
curl http://localhost:4567 -i \
-F "url=http://techno-weenie.net" \
-F "code=abc"
## Sequel
The memory adapter sucks though. You probably want to use a DB. Check
out the [Sequel gem](http://sequel.rubyforge.org/) for more examples.
It'll support SQLite, MySQL, PostgreSQL, and a bunch of other databases.
```ruby
require 'guillotine'
require 'sequel'
module MyApp
class App < Guillotine::App
db = Sequel.sqlite
adapter = Guillotine::Adapters::SequelAdapter.new(db)
set :service => Guillotine::Service.new(adapter)
end
end
```
You'll need to initialize the DB schema with something like this
(depending on which DB you use):
```
CREATE TABLE IF NOT EXISTS `urls` (
`url` varchar(255) DEFAULT NULL,
`code` varchar(255) DEFAULT NULL,
UNIQUE KEY `url` (`url`),
UNIQUE KEY `code` (`code`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
```
## Redis
Redis works well, too. The sample below is [adapted](https://github.com/mrtazz/katana/blob/master/app.rb) from [Katana](https://github.com/mrtazz/katana), a hosted wrapper around Guillotine designed for Heroku.
```ruby
require 'guillotine'
require 'redis'
module MyApp
class App < Guillotine::App
# use redis adapter with redistogo on Heroku
uri = URI.parse(ENV["REDISTOGO_URL"])
redis = Redis.new(:host => uri.host, :port => uri.port, :password => uri.password)
adapter = Guillotine::Adapters::RedisAdapter.new(redis)
set :service => Guillotine::Service.new(adapter)
end
end
```
## Riak
If you need to scale out your url shortening services across the cloud,
you can use Riak!
```ruby
require 'guillotine'
require 'riak/client'
module MyApp
class App < Guillotine::App
client = Riak::Client.new :protocol => 'pbc', :pb_port => 8087
bucket = client['guillotine']
adapter = Guillotine::Adapters::RiakAdapter.new(bucket)
set :service => Guillotine::Service.new(adapter)
end
end
```
## Cassandra
you can use Cassandra!
```ruby
require 'guillotine'
require 'cassandra'
module MyApp
class App < Guillotine::App
cassandra = Cassandra.new('url_shortener', '127.0.0.1:9160')
adapter = Guillotine::Adapters::CassandraAdapter.new(cassandra)
set :service => Guillotine::Service.new(adapter)
end
end
```
You need to create keyspace and column families as below
```sql
CREATE KEYSPACE url_shortener;
USE url_shortener;
CREATE COLUMN FAMILY urls
WITH comparator = UTF8Type
AND key_validation_class=UTF8Type
AND column_metadata = [{column_name: code, validation_class: UTF8Type}];
CREATE COLUMN FAMILY codes
WITH comparator = UTF8Type
AND key_validation_class=UTF8Type
AND column_metadata = [{column_name: url, validation_class: UTF8Type}];
```
## Domain Restriction
You can restrict what domains that Guillotine will shorten.
```ruby
require 'guillotine'
module MyApp
class App < Guillotine::App
adapter = Guillotine::Adapters::MemoryAdapter.new
# only this domain
set :service => Guillotine::Service.new(adapter,
:required_host => 'github.com')
# or, any *.github.com domain
set :service => Guillotine::Service.new(adapter,
:required_host => /(^|\.)github\.com$/)
# or set a simple wildcard
set :service => Guillotine::Servicew.new(adapter,
:required_host => '*.github.com')
end
end
```
## Not TODO
* Statistics
* Authentication
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