Verwendung von HTTParty und Fakeweb

1. Fake my Party
Tanja Otto
24.11.2009
Düsseldorf on Rails

2. SalesLentz::DevTeam

3. Über mich
• internes Entwicklerteam von Sales-Lentz
• IBEs für Reisen, Bustickets, Eventtickets
• seit 2006 entwickeln wir mit Ruby on Rails
• Mit Hussein Morsy Buch Ruby on Rails 2
Galileo Press
http://www.railsbuch.de
http://twitter.com/ajnato
http://devteam.sales-lentz.lu

4. HTTParty
• einfaches senden von HTTP-Anfragen
• JSON und XML werden automatisch in
Ruby-Hashes umgewandelt
• http://github.com/jnunemaker/httparty

5. HTTParty
XML
HTTParty HASH
JSON

6. Installation
sudo gem install httparty

7. Ein erstes Beispiel
require "rubygems"
require "httparty"
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
# puts response.body
# puts response.code # => 200
# puts response.message # => OK
# puts response.headers.inspect
response.each do |item|
puts item['user']['screen_name']
end
# => alexmedeiros59
# => EmySayers
# => ciquuuee
# => bray1972
# => shasoGORGEOUS
# => kimix

8. Beispiel Twitter-API
class Twitter
include HTTParty
base_uri 'twitter.com'
def initialize(u, p)
@auth = {:username => u, :password => p}
end
def timeline(which=:friends, options={})
options.merge!({:basic_auth => @auth})
self.class.get("/statuses/#{which}_timeline.json", options)
end
def post(text)
options = { :query => {:status => text}, :basic_auth => @auth }
self.class.post('/statuses/update.json', options)
end
end
twitter = Twitter.new(USERNAME, PASSWORD)
pp twitter.timeline.map{|t| t['user']['name']}

9. weitere Beispiele
• http://github.com/jnunemaker/httparty/tree/
master/examples

10. FakeWeb
• Helper, um HTTP-Anfragen zu stubben
• Testumgebungen von live-Anfragen
entkoppeln
• Tests sind auch lauffähig, wenn keine
Netzwerkverbindung besteht
• arbeitet mit allen Libraries die auf
Net::HTTP basieren
• http://github.com/chrisk/fakeweb/

11. Installation
sudo gem install fakeweb

12. Mit einfacher
Zeichenkette antworten
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json", :body => "Hello World!")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# => Hello World!
response = HTTParty.get('http://search.twitter.com/trends.json')
puts response.body
# es wird die Antwort der echten Anfrage zurückgeliefert

13. Einer Antwort einen
Status hinzufügen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json",
:body => "Nothing found",
:status => ["404", "Not Found"])
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.code # => "404"
puts response.message # => "Not Found"
puts response.body # => "Nothing found"

14. Auf jede HTTP
Methode antworten
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:any, "http://twitter.com/statuses/
public_timeline.json", :body => "response for any HTTP method")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# => response for any HTTP method
response = HTTParty.post('http://twitter.com/statuses/public_timeline.json')
puts response.body
# response for any HTTP method

15. Wiederholende Anfragen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/public_timeline.json",
[{:body => "Public Timeline", :status => ["200", "OK"]},
{:body => "Timeline not found", :status => ["404", "Not
Found"]}])
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Public Timeline
puts response.code # => 200
puts response.message # => OK
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Timeline not found
puts response.code # => 404
puts response.message # => Not Found
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Timeline not found
puts response.code # => 404
puts response.message # => Not Found

16. Wiederholende Anfragen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json",
[{:body => "Public Timeline", :status => ["200",
"OK"], :times => 2},
{:body => "Timeline not found", :status => ["404",
"Not Found"]}])
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Public Timeline
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Public Timeline
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Timeline not found

17. HTTP Authentifizierung
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://example.com/secret", :body =>
"Unauthorized", :status => ["401", "Unauthorized"])
FakeWeb.register_uri(:get, "http://user:pwd@example.com/secret", :body =>
"Authorized")
response = HTTParty.get('http://example.com/secret')
puts response.body # => Unauthorized
response = HTTParty.get('http://example.com/secret', :basic_auth => {:username
=> "user", :password => "pwd"})
puts response.body # => Authorized

18. Alle registrierten URIs
löschen
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json", :body => "Hello World!")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# => Hello World!
FakeWeb.clean_registry
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body
# es wird die Antwort der echten Anfrage zurückgeliefert

19. Alle live Anfragen
blockieren
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.allow_net_connect = false
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
# => raises FakeWeb::NetConnectNotAllowedError
require "rubygems"
require "fakeweb"
require "httparty"
# default
FakeWeb.allow_net_connect = true
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
# live Anfrage wird gesendet

20. automatisches einlesen
einer Datei
<?xml version="1.0" encoding="UTF-8"?>
<countries>
<country>Belgien</country>
<country>Deutschland</country>
<country>Luxembourg</country>
</countries>
require "rubygems"
require "httparty"
require "fakeweb"
FakeWeb.register_uri(:get, "http://example.com/countries.xml", :body =>
'fixtures/countries.xml', :content_type => "text/xml")
response = HTTParty.get('http://example.com/countries.xml')
puts response.inspect
# => {"countries"=>{"country"=>["Belgien", "Deutschland", "Luxembourg"]}}

21. HTTP response
headers definieren
require "rubygems"
require "fakeweb"
require "httparty"
FakeWeb.register_uri(:get, "http://twitter.com/statuses/
public_timeline.json",
:body => "Hello World!",
:content_type => "text/plain")
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
puts response.body # => Hello World!
puts response.headers.inspect # => {"content-type"=>["text/plain"]}