AWS APIGateway CORS for Lambda Proxy不适用

Question

我已经使用POSTLambda Proxy方法设置了一个APIGateway资源,并OPTIONS为CORS头设置了一个方法.

该OPTIONS方法返回以下标头:

$ curl -i -X OPTIONS https://xxxxxxxxx.execute-api.eu-central-1.amazonaws.com/dev/endpoint1

HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: 0
Connection: keep-alive
Date: Sat, 18 Feb 2017 17:07:17 GMT
x-amzn-RequestId: xxxx
Access-Control-Allow-Origin: *
Access-Control-Allow-Headers: Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token
Access-Control-Allow-Methods: POST,OPTIONS
X-Cache: Miss from cloudfront
Via: 1.1 xxxx.cloudfront.net (CloudFront)
X-Amz-Cf-Id: xxxx==

然而,当我POST使用生成的Javascript SDK 调用端点时,Chrome浏览器控制台会显示以下错误:

XMLHttpRequest cannot load https://xxxx.execute-api.eu-central-1.amazonaws.com/dev/endpoint1.
No 'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'http://localhost:8080' is therefore not allowed access.

以及Firefox:

Cross-Origin Request Blocked: 
The Same Origin Policy disallows reading the remote resource at https://xxxx.execute-api.eu-central-1.amazonaws.com/dev/endpoint1.
(Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

为什么我的CORS标头没有考虑在内？是否需要对POST方法设置进行其他更改？

Answer 1

似乎需要在lambda函数中手动添加标头.

在NodeJS的情况下,脚本将如下所示:

context.succeed({
    "statusCode": 200,
    "headers": {
        "X-Requested-With": '*',
        "Access-Control-Allow-Headers": 'Content-Type,X-Amz-Date,Authorization,X-Api-Key,x-requested-with',
        "Access-Control-Allow-Origin": '*',
        "Access-Control-Allow-Methods": 'POST,GET,OPTIONS'
    },
    "body": JSON.stringify(response)
})