实例化客户端 (Typescript) AWS Rekognition 客户端的正确方法是什么？

Question

我有一个使用 Next/React 构建的前端应用程序。 我正在尝试通过 v3 Javascript AWS SDK 使用 AWS Rekognition 创建图像审核功能。

我配置了一个 AWS Cognito 身份池，它挂钩到用户池。 用户登录后，使用 Rekognition 的界面即可使用。

我已经检查了 v3 文档，但请参阅 冲突 代码示例，了解如何使用

fromCognitoIdentityPool()

实例化客户端凭据，这两者都会给我带来输入错误。

以下代码在传递给

client

时给我带来了

fromCognitoIdentityPool()

的类型错误：

import {
  RekognitionClient,
  DetectModerationLabelsCommand,
} from '@aws-sdk/client-rekognition';
import { fromCognitoIdentityPool } from '@aws-sdk/credential-providers';
import { CognitoIdentityClient } from '@aws-sdk/client-cognito-identity';

const AWS_REGION = process.env.NEXT_PUBLIC_AWS_REGION;
const AWS_IDENTITY_POOL_ID = process.env.NEXT_PUBLIC_COGNITO_IDENTITY_POOL_ID;

const moderateImage = async (imagePath: string) => {
  const client = new RekognitionClient({
    region: AWS_REGION,
    credentials: fromCognitoIdentityPool({
      identityPoolId: AWS_IDENTITY_POOL_ID!,
      client: new CognitoIdentityClient({ region: AWS_REGION }),
    }),
  });

  const base64Image = imagePath.split(';base64,').pop();
  const imageBuffer = Buffer.from(base64Image as string, 'base64');
  const params = {
    Image: {
      Bytes: imageBuffer,
    },
    MinConfidence: 70,
  };

  const command = new DetectModerationLabelsCommand(params);
  const response = await client.send(command);

  return response;
};

export default moderateImage;  

出现错误：

Argument of type '{ identityPoolId: string; client: CognitoIdentityClient; }' is not assignable to parameter of type 'FromCognitoIdentityPoolParameters'.
  Object literal may only specify known properties, and 'client' does not exist in type 'FromCognitoIdentityPoolParameters'.ts(2345)
Argument of type '{ identityPoolId: string; client: CognitoIdentityClient; }' is not assignable to parameter of type 'FromCognitoIdentityPoolParameters'.

实例化 Rekognition 客户端的正确方法是什么？

Answer 1

尝试从

fromCognitoIdentityPool

而不是

@aws-sdk/credential-providers

获取

@aws-sdk/credential-provider-cognito-identity

。不推荐后者。

我在新文档中找不到该建议，但在旧文档中找到了。 https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/modules/_aws_sdk_credential_provider_cognito_identity.html

这是

credential-providers

版本的文档。 https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-credential-providers/Variable/fromCognitoIdentityPool/

如果您在本地配置了凭据，则可以完全省略

client

参数。但是，如果没有，

credential-provider

版本只需要

clientConfig

。

import { fromCognitoIdentityPool } from "@aws-sdk/credential-providers";
import { RekognitionClient } from "@aws-sdk/client-rekognition";

const rekClient = new RekognitionClient({
  region: "us-east-1",
  credentials: fromCognitoIdentityPool({
    identityPoolId: "redacted",
    clientConfig: { region: "us-east-1" },
  }),
});