a python web service

A Python a web service

A Python a web service@vtemian

Let’s imaginea perfect world...

WEB APPLICATION

A Python a web serviceWEB APPLICATION

Tools & Utilities

Tools & Utilities Web Process

Tools & Utilities Web Process Worker Process

WEB APPLICATION

Tools & Utilities

management tools

supporting services

Web Process Worker Process

WEB APPLICATION

Tools & Utilities

management tools

supporting services

Web Process

user interface

api service

data persistence

crud admin

Worker Process

WEB APPLICATION

Tools & Utilities

management tools

supporting services

Web Process

user interface

api service

data persistence

crud admin

Worker Process

deferred tasks

scheduled tasks

WEB APPLICATION

Tools & Utilities

management tools

supporting services

Web Process

user interface

api service

data persistence

crud admin

Worker Process

deferred tasks

scheduled tasks

WEB APPLICATION

Tools & Utilities

management tools

supporting services

Web Process

user interface

api service

data persistence

crud admin

Worker Process

deferred tasks

scheduled tasks

WEB APPLICATION

Tools & Utilities

management tools

supporting services

Web Process

user interface

api service

data persistence

crud admin

Worker Process

deferred tasks

scheduled tasks

WEB APPLICATION

Tools & Utilities

management tools

supporting services

Web Process

user interface

api service

data persistence

crud admin

Worker Process

deferred tasks

scheduled tasks

WEB APPLICATION

Single codebase areEVIL!

Tools & Utilities

management tools

supporting services

Web Process

user interface

api service

data persistence

crud admin

Worker Process

deferred tasks

scheduled tasksTOTAL MESS

Decouple!

Developers

API service

Data persistence

Frontend

End Users

Developers End Users Internal

API service API service API service

Data persistence

Good API

Good APIIntuitive

similar things should be similar, ugly things should look ugly

Documented

Opinionated

Featurespagination

propper HTTPresponse handling throttling

permissions serializationauthentification

posting of data with validation

Django

regex routing system

Django

regex routing system built-in orm

users = Users.objects.filter(last_login__lt=timestamp)

Django

authmigrations

management tools makes decision for you

templating system

built-in orm crud admin

testing tools

Django

A Python a web service NOBODY CARES

Developers End Users Internal

API service API service API service

Data persistence

Django

makes decision for you

templating system

testing tools

Django

Django REST Framework

Just install it, write 20 lines of code> CRUD API

API Console

Great community

Easy to document your API

Integration test usingAPIRequestFactory

OAuth 1 & 2 out of the box

Serialization

Django paginatoror PaginationSerializer

Object or field level validation

Using django caching policy

For throttling, just add: DEFAULT_THROTTLE_CLASSES +

DEFAULT_THROTTLE_RATESin settings.py

Powerful and extensible object level permissions

Depends on Django >get all the Django mess

Pretty huge

Can do a lot of black magic

Django Tastypie

Plug and play

Decent auth support

Documented

Still supported

Paginator for pagination

Validation --- you can extend it

serializer = Serializer(formats=[‘json’, ‘jsonp’, ‘xml’, ‘yaml’, ‘html’, ‘plist’])

throttle = BaseThrottle(throttle_at=100)

NO NO NO

Not intuitive

class ParentResource(ModelResource): children = fields.ToManyField(ChildResource, ‘children’)

def prepend_urls(self): return [ url(r”^(?P<resource_name>%s)/(?P<pk>\w[\w/-]*)/children%s$” % (self._meta.resource_name, trailing_slash()), self.wrap_view(‘get_children’), name=”api_get_children”), ] def get_children(self, request, **kwargs): try: bundle = self.build_bundle(data={‘pk’: kwargs[‘pk’]}, request=request) obj = self.cached_obj_get(bundle=bundle, **self.remove_api_resource_names(kwargs)) except ObjectDoesNotExist: return HttpGone() except MultipleObjectsReturned: return HttpMultipleChoices(“More than one resource is found at this URI.”)

child_resource = ChildResource() return child_resource.get_detail(request, parent_id=obj.pk)

Depends on Django >get all the Django mess

from flask import Flaskapp = Flask(__name__)

@app.route(“/”)def hello(): return “Hello World!”

if __name__ == “__main__”: app.run()

Werkzeug, Jinja 2 and good intentions

Very small and easy to learn(super intuitive)

Solid and well documented

Awesome and strong community

Great debugging tools

Application dispatcher (on wsgi level)

Integrating unittest and integration tests (also check flask-testing)

Signals

Configuration == dict

Blueprints

Response object == wsgi app

SHOW ME THE SOURCEYOU MUST

Some batteries

Flask-SQLAlchemy Flask-Testing

Flask-Oauthlib

Flask-Script

Flask-PrincipalFlask-Cache

Flask-Classy

Resources

Kenneth ReitzFlask GoodnessAPI Driven DevelopmentHow I develop Things and Why?

Kevin LackerHow to Design Great APIs?

Thank you!

DRINK ALL THE BEERS!

a python web service

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