Question

我的 AWS ApiGateway 调用了这个 lambda 函数：

const handler = (event, context) => {

    const theResponse = {
        "statusCode": 200,
        "isBase64Encoded": false,
        "headers": {
            "Content-Type": "application/json"
        },
        "body": "hello, world"
    };

    switch (event.httpMethod) {
        case 'GET':
            theResponse["body"] = `method ${event.httpMethod} detected`;
            break;
        default:
            theResponse["statusCode"] = 404;
            theResponse["body"] = `Unsupported method ${event.httpMethod} detected`;
            break;
    }
    return theResponse;
};


module.exports = {
    handler,
};

关于为什么会出现此错误的任何想法：

{"message": "Internal server error"}
Received response. Status: 200, Integration latency: 344 ms
Endpoint response body before transformations: null
Execution failed due to configuration error: Malformed Lambda proxy response
Method completed with status: 502

我尝试用 return (theResponse); 替换 return JSON.stringify(theResponse); 但这也返回相同的错误。

但是，如果我将 return theResponse; 替换为 return {"statusCode":200, "body":"hello, world"};，则 API 执行时不会出错。

在我看来像是 lamda_proxy 集成问题，但我不明白为什么。谢谢。

Answer 1

持枪者！

我想这与您构建响应对象的方式有关：

尝试仅对 body 属性进行字符串化：

    case 'GET':
        theResponse["body"] = JSON.stringify(`method ${event.httpMethod} detected`);
        break;
    default:
        theResponse["statusCode"] = 404;
        theResponse["body"] = JSON.stringify(`Unsupported method ${event.httpMethod} detected`);
        break;
    }

AWS lambda api 网关错误“格式错误的 Lambda 代理响应”

1 个答案: