尝试使用AWS API网关代理集成在POST上启用CORS时出现500错误

Question

我有一个响应方法,看起来像我的Lambda函数:

def respond(err, res=None):
    return {
        'statusCode': 400 if err else 200,
        'body': json.dumps(err) if err else json.dumps(res),
        'headers': {
            'Access-Control-Allow-Headers': 'content-type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token',
            'Access-Control-Allow-Methods': 'POST, GET, DELETE',
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Credentials': True,
            'Content-Type': 'application/json',
        },
    }

当我使用Postman的OPTIONS请求测试我的端点时,我收到500内部服务器错误.如果我从API网关控制台测试它,我另外得到这个:

Execution log for request test-request
Wed Jul 05 14:25:26 UTC 2017 : Starting execution for request: test-invoke-request
Wed Jul 05 14:25:26 UTC 2017 : HTTP Method: OPTIONS, Resource Path: /login
Wed Jul 05 14:25:26 UTC 2017 : Method request path: {}
Wed Jul 05 14:25:26 UTC 2017 : Method request query string: {}
Wed Jul 05 14:25:26 UTC 2017 : Method request headers: {}
Wed Jul 05 14:25:26 UTC 2017 : Method request body before transformations: 
Wed Jul 05 14:25:26 UTC 2017 : Received response. Integration latency: 0 ms
Wed Jul 05 14:25:26 UTC 2017 : Endpoint response body before transformations: 
Wed Jul 05 14:25:26 UTC 2017 : Endpoint response headers: {}
Wed Jul 05 14:25:26 UTC 2017 : Execution failed due to configuration error: Output mapping refers to an invalid method response: 200
Wed Jul 05 14:25:26 UTC 2017 : Method completed with status: 500

我不确定我做错了什么.我想我正在返回所有正确的标题.任何帮助表示赞赏.

Answer 1

我最终使用无服务器框架完全重建了项目，CORS 现在可以工作了。我仍然不确定出了什么问题。API Gateway看起来很有气质。