Dynamic Routes

noreply@example.com (AG Sayyed) — Fri, 25 Jul 2025 00:00:00 +0000

This document explores dynamic routing in Flask, including how to pass parameters in URLs, call external APIs, and use parameter types for robust RESTful endpoints. It covers practical examples for integrating external data and validating user input in web applications.

Calling External APIs in Flask

Flask can interact with external APIs using the Python requests library. This allows applications to fetch, process, and return data from third-party services.

 1import requests
 2from flask import Flask, jsonify
 3
 4app = Flask(__name__)
 5
 6@app.route('/author')
 7def author_info():
 8 res = requests.get('https://openlibrary.org/search/authors.json?q=Michael+Crichton')
 9 if res.status_code == 200:
10 return jsonify(res.json())
11 elif res.status_code == 404:
12 return {'message': 'Something went wrong.'}, 404
13 else:
14 return {'message': 'Server error.'}, 500

This example fetches author data from the OpenLibrary API and returns the result to the client, handling different status codes appropriately.

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Dynamic Routes

Calling External APIs in Flask