我在node.js lambda中尝试了这段代码，它工作了，它将我的图片插入到我的s3桶中，但是当我试图打开s3桶中的图片时，它不会渲染，有人知道为什么吗？我希望可以访问图片URL
enter image description here

const AWS = require('aws-sdk');
const S3 = new AWS.S3();

exports.handler = async (event) => {
  try {
    
    // Extract picture data from the event (e.g., base64 encoded data)
    const pictureData = event.pictureData;

    // Specify the S3 bucket and object key
    const bucketName = 'BUCKET NAME';
    const objectKey = 'lambda/your-object-key3.jpg'; // Adjust the file extension accordingly

    // Convert the picture data to a buffer
    const buffer = Buffer.from(pictureData, 'base64');

    // Upload the picture to S3
    await S3.putObject({
      Bucket: bucketName,
      Key: objectKey,
      Body: buffer,
      ACL: 'public-read', // Optionally set ACL for the uploaded object
      ContentType: 'image/jpeg',
    }).promise();

    return {
      statusCode: 200,
      body: JSON.stringify('Picture uploaded successfully'),
    };
  } catch (err) {
    console.error('Error uploading picture:', err);
    return {
      statusCode: 500,
      body: JSON.stringify('Error uploading picture'),
    };
  }
};

字符串