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I'm trying to create a new service using AWS API Gateway, but I found out the browser automatically calls OPTIONS method in order to obtain CORS information.
The problem is that AWS API Gateway does not offer a native way to configure CORS headers.
Is it possible to create a Lambda Script in order to respond to OPTIONS method?
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To pass custom headers from an API Gateway API to a Lambda function, use a body mapping template. The API sends the updated API request to a Lambda function to process the headers. Then, the Lambda function returns one or more header values from the original API request.
Enable CORS support on a REST API resourceSign in to the API Gateway console at https://console.aws.amazon.com/apigateway . Choose the API from the APIs list. Choose a resource under Resources. This will enable CORS for all the methods on the resource.
If you have lambda-proxy enabled, you need to set the CORS headers manually:
module.exports.hello = function(event, context, callback) { const response = { statusCode: 200, headers: { "Access-Control-Allow-Origin" : "*", // Required for CORS support to work "Access-Control-Allow-Credentials" : true // Required for cookies, authorization headers with HTTPS }, body: JSON.stringify({ "message": "Hello World!" }) }; callback(null, response); }; https://serverless.com/framework/docs/providers/aws/events/apigateway#enabling-cors
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