尝试上传到 aws s3 存储桶时收到 400 错误请求

Question

我在我的服务器上签署 URL 并将其发送回客户端，它工作正常。这是该函数的外观

const aws = require('aws-sdk'),
    config = require('config'),
    crypto = require('crypto');


module.exports = async function(file_type) {

    aws.config.update({accessKeyId: config.AWS_ACCESS_KEY, secretAccessKey: config.AWS_SECRET_KEY})

    const s3 = new aws.S3();

    try {
        if (!file_type === "image/png") {
            return ({success: false, error: 'Please provide a valid video format'});
        }
        let buffer = await crypto.randomBytes(12);

        let key = buffer.toString('hex');

        let options = {
            Bucket: config.AWS_S3_BUCKET,
            Key: key,
            Expires: 60,
            ContentType: file_type,
            ACL: 'public-read',
        }

        let data = await s3.getSignedUrl('putObject', options);
        console.log('data was', data)
        return ({
            success: true,
            signed_request: data,
            url: ('https://s3.amazonaws.com/' + config.AWS_S3_BUCKET + '/' + key),
            key,
        });
    } catch (error) {
        console.log('the error was', error)
        return ({
            success: false,
            error: error.message,
        })
    }
}

所以这很好用，最终让我得到一个像

https://mybucket.s3.amazonaws.com/a33b4a43f23fc41de9ddck1k?AWSAccessKeyId=ADIFJDGPMRFRGLXSYWPQ&Content-Type=image%2Fpng&Expires=1496716543&Signature=0zcx%2BFRFz2UoeQFD230daclxmoeQFD02D

然后当我在客户端上得到那个 url 时..我使用 axios 发送一个 PUT 请求，其功能类似于 -

function uploadToS3(file, signedRequest, callback){

    var options = {
        headers: {
            'Content-Type': file.type
        }
    };

    axios.put(signedRequest, file, options)
        .then(result =>{
            console.log('the result was', result)
            callback(result)
        })
        .catch(err =>{
            callback(err)
        })

}

我唯一要回来的是 (400) Bad Request

Answer 1

我遇到了同样的问题，在搜索了几个小时后，我能够通过将我的存储桶区域添加到服务器端后端来解决它，在那里我使用s3.getSignedUrl()请求签名 URL 。

const s3 = new AWS.S3({
    accessKeyId:"your accessKeyId",
    secretAccessKey:"your secret access key",
    region:"ap-south-1" // could be different in your case
})
const key = `${req.user.id}/${uuid()}.jpeg`

s3.getSignedUrl('putObject',{
        Bucket:'your bucket name',
        ContentType:'image/jpeg',
        Key:key
    }, (e,url)=>{
        res.send({key,url})
})

获取签名 URL 后，我在客户端使用axios.put()使用 URL 将图像上传到我的 s3 存储桶。

  const uploadConf = await axios.get('/api/uploadFile');
  await axios.put(uploadConf.data.url,file, {
    headers:{
      'Content-Type': file.type
    }
  });

希望这能解决您的问题。

Answer 2

猜测您提供的标头有问题

对我有用

 function upload(file, signedRequest, done) {
  const xhr = new XMLHttpRequest();
  xhr.open('PUT', signedRequest);
  xhr.setRequestHeader('x-amz-acl', 'public-read');
  xhr.onload = () => {
    if (xhr.status === 200) {
      done();
    }
  };

  xhr.send(file);
}