The adapter for the migration from express to koa

If you have search the two framework on npm, you will get 16k+ (express) and 4k+ (koa). express has a bigger ecosystem than koa, This package will let you use express middleware in koa application.

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Usage

You can simply wrap express middleware with wrap function.

const { wrap } = require('koa-express-adapter');
const Koa = require('koa');
const app = new Koa();
// wrap express middleware
app.use(wrap(function(req, res) {
  res.send('Hello World');
}));

Note: Don't define next argument when you don't use it.

// it's wrong
app.use(wrap(function(req, res, next) {
  res.send('Hello World');
}));

Express API

Request

• accepts
• acceptsCharset
• acceptsCharsets
• acceptsEncoding
• acceptsEncodings
• acceptsLanguage
• acceptsLanguages
• baseUrl
• fresh
• get
• hostname
• host
• ip
• ips
• is
• param
• path
• protocol
• query
• range
• route
• secure
• signedCookies
• stale
• subdomains
• xhr

Response

• append
• attachment
• clearCookie
• cookie
• download
• format
• get
• json
• jsonp
• links
• locals
• location
• redirect
• render
• send
• sendFile
• sendStatus
• set
• status
• type
• vary

Testcase

Thanks for express testcase for compatible unittest.

License

(The MIT License)