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Building Python Microservices with FastAPI

You're reading from   Building Python Microservices with FastAPI Build secure, scalable, and structured Python microservices from design concepts to infrastructure

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Product type Paperback
Published in Aug 2022
Publisher Packt
ISBN-13 9781803245966
Length 420 pages
Edition 1st Edition
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Author (1):
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Sherwin John C. Tragura Sherwin John C. Tragura
Author Profile Icon Sherwin John C. Tragura
Sherwin John C. Tragura
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Table of Contents (17) Chapters Close

Preface 1. Part 1: Application-Related Architectural Concepts for FastAPI microservice development
2. Chapter 1: Setting Up FastAPI for Starters FREE CHAPTER 3. Chapter 2: Exploring the Core Features 4. Chapter 3: Investigating Dependency Injection 5. Chapter 4: Building the Microservice Application 6. Part 2: Data-Centric and Communication-Focused Microservices Concerns and Issues
7. Chapter 5: Connecting to a Relational Database 8. Chapter 6: Using a Non-Relational Database 9. Chapter 7: Securing the REST APIs 10. Chapter 8: Creating Coroutines, Events, and Message-Driven Transactions 11. Part 3: Infrastructure-Related Issues, Numerical and Symbolic Computations, and Testing Microservices
12. Chapter 9: Utilizing Other Advanced Features 13. Chapter 10: Solving Numerical, Symbolic, and Graphical Problems 14. Chapter 11: Adding Other Microservice Features 15. Index 16. Other Books You May Enjoy

Implementing the main endpoint

There are so many solutions when it comes to implementing this gateway endpoint, and among them is having a simple REST API service in the top-level application with an integer path parameter that will identify the ID parameter of the microservice. If the ID parameter is invalid, the endpoint will only return the {'message': 'University ERP Systems'} JSON string instead of an error. The following script is a straightforward implementation of this endpoint:

from fastapi import APIRouter
router = APIRouter()
@router.get("/university/{portal_id}")
def access_portal(portal_id:int): 
    return {'message': 'University ERP Systems'}

The access_portal API endpoint is created as a GET path operation with portal_id as its path parameter. The portal_id parameter is essential to this process because it will determine which among the Student, Faculty, and Library microservices the user wants...

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