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@koa/cors

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@koa/cors

Cross-Origin Resource Sharing(CORS) for koa

  • 5.0.0
  • latest
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
692K
increased by3.62%
Maintainers
9
Weekly downloads
 
Created

What is @koa/cors?

@koa/cors is a middleware for Koa.js that enables Cross-Origin Resource Sharing (CORS) with various configuration options. It allows you to specify which origins are permitted to access your resources, as well as other CORS-related settings.

What are @koa/cors's main functionalities?

Basic CORS Setup

This code sets up a basic Koa server with CORS enabled for all origins. It uses the @koa/cors middleware without any additional configuration.

const Koa = require('koa');
const cors = require('@koa/cors');
const app = new Koa();
app.use(cors());
app.listen(3000);

Restricting Origins

This code configures the @koa/cors middleware to only allow requests from 'https://example.com'.

const Koa = require('koa');
const cors = require('@koa/cors');
const app = new Koa();
app.use(cors({ origin: 'https://example.com' }));
app.listen(3000);

Configuring Additional CORS Options

This code demonstrates how to configure additional CORS options such as allowed methods, headers, exposed headers, max age, and credentials.

const Koa = require('koa');
const cors = require('@koa/cors');
const app = new Koa();
app.use(cors({
  origin: '*',
  allowMethods: ['GET', 'POST'],
  allowHeaders: ['Content-Type', 'Authorization'],
  exposeHeaders: ['Content-Length', 'Date'],
  maxAge: 3600,
  credentials: true
}));
app.listen(3000);

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Package last updated on 11 Dec 2023

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