问题描述
我正在使用KMS库使用AWS开发工具包.我想使用异步和等待而不是回调.
I am working with the AWS SDK using the KMS libary. I would like to use async and await instead of callbacks.
import AWS, { KMS } from "aws-sdk";
this.kms = new AWS.KMS();
const key = await this.kms.generateDataKey();
但是,当包装到异步函数中时,此方法不起作用.
However this does not work, when wrapped in an async function.
我如何使用异步并在这里等待?
How can i use async and await here?
推荐答案
如果使用版本> 2.x的aws-sdk,则可以将aws.Request
转换为具有链.promise()
函数的promise.对于您的情况:
If you are using aws-sdk with version > 2.x, you can tranform a aws.Request
to a promise with chain .promise()
function.For your case:
try {
let key = await kms.generateDataKey().promise();
} catch (e) {
console.log(e);
}
key
是KMS.Types.GenerateDataKeyResponse
-回调的第二个参数(采用回调样式).
the key
is a KMS.Types.GenerateDataKeyResponse
- the second param of callback(in callback style).
e
是AWSError
-回调函数的第一个参数
The e
is a AWSError
- The first param of callback func
注意:await
表达式仅在异步函数中允许
note: await
expression only allowed within an async function
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