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@middy/http-cors
Advanced tools
CORS (Cross-Origin Resource Sharing) middleware for the middy framework
CORS middleware for the middy framework, the stylish Node.js middleware engine for AWS Lambda
This middleware sets HTTP CORS headers (Access-Control-Allow-Origin
, Access-Control-Allow-Headers
, Access-Control-Allow-Credentials
), necessary for making cross-origin requests, to the response object.
Sets headers in after
and onError
phases.
To install this middleware you can use NPM:
npm install --save @middy/http-cors
getOrigin
(function(incomingOrigin:string, options)) (optional): take full control of the generating the returned origin. Defaults to using the origin or origins option.origin
(string) (optional): origin to put in the header (default: "*
")origins
(array) (optional): An array of allowed origins. The incoming origin is matched against the list and is returned if present.headers
(string) (optional): value to put in Access-Control-Allow-Headers (default: null
)credentials
(bool) (optional): if true, sets the Access-Control-Allow-Origin
as request header Origin
, if present (default false
)NOTES:
httpErrorHandler
middleware before the cors
middleware like this:const middy = require('@middy/core')
const httpErrorHandler = require('@middy/http-error-handler')
const cors = require('@middy/http-cors')
const handler = middy((event, context, cb) => {
throw new createError.UnprocessableEntity()
})
handler.use(httpErrorHandler())
.use(cors())
// when Lambda runs the handler...
handler({}, {}, (_, response) => {
expect(response.headers['Access-Control-Allow-Origin']).toEqual('*')
expect(response).toEqual({
statusCode: 422,
body: 'Unprocessable Entity'
})
})
const middy = require('@middy/core')
const { cors } = require('@middy/http-cors')
const handler = middy((event, context, cb) => {
cb(null, {})
})
handler.use(cors())
// when Lambda runs the handler...
handler({}, {}, (_, response) => {
expect(response.headers['Access-Control-Allow-Origin']).toEqual('*')
})
For more documentation and examples, refers to the main Middy monorepo on GitHub or Middy official website.
Everyone is very welcome to contribute to this repository. Feel free to raise issues or to submit Pull Requests.
Licensed under MIT License. Copyright (c) 2017-2018 Luciano Mammino and the Middy team.
FAQs
CORS (Cross-Origin Resource Sharing) middleware for the middy framework
The npm package @middy/http-cors receives a total of 67,376 weekly downloads. As such, @middy/http-cors popularity was classified as popular.
We found that @middy/http-cors demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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