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Python Programming Blueprints

You're reading from   Python Programming Blueprints Build nine projects by leveraging powerful frameworks such as Flask, Nameko, and Django

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781786468161
Length 456 pages
Edition 1st Edition
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Authors (3):
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Marcus Pennington Marcus Pennington
Author Profile Icon Marcus Pennington
Marcus Pennington
Pierluigi Riti Pierluigi Riti
Author Profile Icon Pierluigi Riti
Pierluigi Riti
Daniel Furtado Daniel Furtado
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Daniel Furtado
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Table of Contents (11) Chapters Close

Preface 1. Implementing the Weather Application FREE CHAPTER 2. Creating a Remote-Control Application with Spotify 3. Casting Votes on Twitter 4. Exchange Rates and the Currency Conversion Tool 5. Building a Web Messenger with Microservices 6. Extending TempMessenger with a User Authentication Microservice 7. Online Video Game Store with Django 8. Order Microservice 9. Notification Serverless Application 10. Other Books You May Enjoy

Exposing HTTP entrypoints


We will now create a new microservice responsible for handling HTTP requests. First of all, let's amend our imports in the service.py file:

from nameko.rpc import rpc, RpcProxy 
from nameko.web.handlers import http 

Beneath the KonnichiwaService we made earlier, insert the following:

class WebServer: 
 
    name = 'web_server' 
    konnichiwa_service = RpcProxy('konnichiwa_service') 
 
    @http('GET', '/') 
    def home(self, request): 
        return self.konnichiwa_service.konnichiwa() 

Notice how the follows a similar pattern to the KonnichiwaService. It has a name attribute and a method decorated in order to expose it as an entrypoint. In this case, it is decorated with the http entrypoint. We specify inside the http decorator that it is a GET request and the location of that request - in this case, the root of our website.

There is also one more crucial difference: This service holds a reference to the Konnichiwa Service via an RpcProxy object. RpcProxy allows...

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