如何使用Nodejs读取和上传图像到AWS S3

Question

我已经将upload.js脚本放在一起，从本地驱动器读取图像jpg文件并将其上传到AWS S3桶。

var fs = require('fs');
var AWS = require('aws-sdk');
AWS.config.update({region: 'us-east-1'});

const BUCKET_NAME = 'my-bucket-name';

let filepath = '/home/user/test-image.jpeg';
const content = fs.readFileSync(filepath, {encoding: 'base64'});
let params = {
params: {
Bucket: BUCKET_NAME,
Key: 'test.jpeg',
Body: content
}
};
var upload = new AWS.S3.ManagedUpload(params);
var promise = upload.promise();
promise.then(
function(data) {
console.log("Successfully uploaded photo.");
},
function(err) {
console.error("There was an error uploading: ", err.message);
}
);

当我用node upload.js运行它时，图像被上传。但是当我把它下载回来时，下载的图像已经损坏，无法用图像查看器打开。我做错了什么?

Answer 1

将ContentType: image/jpeg添加到params对象并松开base64 encoding，此配置也将为您工作。

var fs = require('fs');
const AWS = require('aws-sdk');
// const s3 = new AWS.S3();
AWS.config.update({ region: 'us-east-1' });
const mime = require('mime');
const BUCKET_NAME = 'my-bucket-name';
let filepath = '/home/user/test-image.jpeg';
const content = fs.readFileSync(filepath);
console.log(mime.getType(filepath));
let params = {
params: {
Bucket: BUCKET_NAME,
Key: 'cancel.jpeg',
Body: content,
ContentType: mime.getType(filepath),
},
};
var upload = new AWS.S3.ManagedUpload(params);
var promise = upload.promise();
promise.then(
function (data) {
console.log('Successfully uploaded photo.');
},
function (err) {
console.error('There was an error uploading: ', err.message);
}
);