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Master Cross-Origin Resource Sharing in Python with aiohttp-cors

Explore how to handle cross origin requests in Python using aiohttp middleware. This cors tutorial covers everything you need to know about using the aiohttp-cors library effectively.

pip install aiohttp-cors

Overview

What is aiohttp-cors and why use it?

Key features and capabilities

Installation instructions

Basic usage examples

Common use cases

Best practices and tips

Common Use Cases

Enable CORS for specific endpoints in a Python web application
Handle cross-origin requests with aiohttp middleware
Set up CORS policies for REST APIs

Code Examples

Getting Started with aiohttp-cors

import aiohttp_cors\n\nasync def hello(request):\n    return web.Response(text='Hello, world!')\n\napp = web.Application()\ncors = aiohttp_cors.setup(app)\n\nresource = cors.add(app.router.add_resource('/'))\nroute = cors.add(\n    resource.add_route('GET', hello),\n    {'*': aiohttp_cors.ResourceOptions(allow_credentials=True,\n                                       expose_headers='*',\n                                       allow_headers='*')})\n\nweb.run_app(app)

Advanced aiohttp-cors Example

import aiohttp_cors\nfrom aiohttp import web\n\nasync def advanced_handler(request):\n    return web.json_response({'status': 'Advanced CORS enabled'})\n\napp = web.Application()\ncors = aiohttp_cors.setup(app, defaults={\n    '*': aiohttp_cors.ResourceOptions(\n            allow_credentials=True,\n            expose_headers='*',\n            allow_headers='*')\n})\n\nresource = cors.add(app.router.add_resource('/advanced'))\nroute = cors.add(resource.add_route('POST', advanced_handler))\n\nweb.run_app(app)

Alternatives

Flask-CORS Django-CORS-Headers

Common Methods

setup

Configures CORS for the aiohttp application

add

Adds a new route or resource to be handled by CORS

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