如何将图像上传到s3存储桶

Question

我正在尝试将名为“quotes.png”的图像上传到我的Ionic 2应用程序中的s3存储桶（没有使用节点），但它显示“网络故障”。

这就是我的代码的样子（省略了敏感信息）：

import AWS from 'aws-sdk';
import S3 from 'aws-sdk/clients/s3';

AWS.config.update({ accessKeyId: 'myaccesskeyid', secretAccessKey: 'mysecretaccesskey' })
var s3 = new AWS.S3();
var params = {
        Bucket: 'mybucketname',
        Key: 'assets/img/quotes.png',
        Body: "hello"
    };
    s3.putObject(params, function (err, res) {

        if (err) {

            console.log(err);
        } else {
              debugger;
            console.log("Successfully uploaded data to myBucket/myKey");
        }
    });

（更新）这是错误的详细信息：

XMLHttpRequest cannot load https://mybucket-name.s3-ap-southeast-
1.amazonaws.com/assets/img/quotes.png. Response to preflight request doesn't 
pass access control check: No 'Access-Control-Allow-Origin' header is 
present on the requested resource. Origin 'http://localhost:8100' is 
therefore not allowed access. The response had HTTP status code 403.

Error: Network Failure
at XMLHttpRequest.<anonymous> (xhr.js:52)
at t.invokeTask (polyfills.js:3)
at Object.onInvokeTask (ng_zone.js:227)
at t.invokeTask (polyfills.js:3)
at e.runTask (polyfills.js:3)
at XMLHttpRequest.invoke (polyfills.js:3)

注意：我不在我的Ionic 2应用程序中使用节点js。我正在使用Parse JavaScript SDK，AWS S3，AWS EC2，Elastic beanstalk和Ionic 2与Angular 2。

所以问题是：我是否正确编写了代码/我的代码有问题吗？谢谢 ：）

Answer 1

您需要在AWS.config中指定存储桶所在的区域。

例：

AWS.config.update（{region：'us-west-2'}）;

在调用新AWS.S3（）之前插入此行。

Answer 2

这是在aws中使用s3存储桶上传图像的最新代码

var AWS = require('aws-sdk');
var fs = require('fs');
var path = require('path');
var multerS3 = require('multer-s3');

AWS.config.update({
accessKeyId: "",
secretAccessKey: "",
region:''
});

 router.post('/upload_images_s3', upload.single('image'),  (req,res,next) => {
        res.json('Successfully uploaded  files!')
 });
 
 var maxSize = 1024 * 1024 * 50;
var  rootFolder = path.resolve(__dirname, './');
var s3 = new AWS.S3({params: {Bucket: 'keyfi'}});
var upload = multer({
    storage: multerS3({
      s3: s3,
      bucket: 'keyfi/images',
      acl: 'public-read-write',
      limits: {
        fileSize: maxSize
    },
      metadata: function (req, file, cb) {
        cb(null,{fieldName:file.originalname});
        console.log(file);
      },
      key: function (req, file, cb) {
       
        cb(null,file.originalname)
      }
    })
  })