Nodejs Amazon S3文件上传

时间:2016-04-30 19:09:31

标签: node.js amazon-s3 module

我正在尝试创建一个将我的本地文件上传到我的S3存储桶的表单,但是我对上传逻辑的哪些部分应该存在感到有些困惑。我希望保持我的POST路由清洁并引用位于单独文件中的AWS逻辑,但是我对于params级别的Body属性应该使用什么值以及我应该如何引用它感到困惑。将完成的上载URL设置为fileAttachment行的数据库属性时的模块。有人能指出我正确的方向吗?

这是我的aws-s3.js文件:

module.exports = function() {

var path = require('path');
var async = require('async');
var fs = require('fs');
var AWS = require('aws-sdk');
var config = require(path.resolve(__dirname, '..', '..','./config/config.js'));

AWS.config.region = config.region;

var s3 = new AWS.S3({params: {Bucket: config.awsBucket}});

var params = {Key: config.awsAccessKeyId, Body: req.body.fileAttachment};

s3.upload(params, function(err, data){
    if (err) {
        console.log("Error uploading data: ", err);
    } else {
        console.log("Successfully uploaded data to " + config.awsBucket + " /myKey");

    }
});

return s3;

};

这是我的路线:

appRoutes.route('/create/file')

    .get(function(req, res){
        models.DiscoverySource.findAll({
            where: {
                organizationId: req.user.organizationId
            }, attributes: ['discoverySource']
        }).then(function(discoverySource){
            res.render('pages/app/file-create.hbs',{
                discoverySource: discoverySource
            });
        });

    })



    .post(function(req, res){
        models.File.create({
            discovery: req.body.discovery,
            discoverySource: req.body.discoverySource,
            fileAttachment: 
            userId: req.user.user_id        
        }).then(function(){
            res.redirect('/app');
        });
    });

形式:

<form action="/app/create/file" method="post">
                <div class="form-header">
                    <label for="data-discovery-source">Discovery Source:</label>
                    <select name="discoverySource">
                        {{#each discoverySource}}
                        <option value="{{this.discoverySource}}">{{this.discoverySource}}</option>
                        {{/each}}
                    </select>
                    <label for="data-discovery">Discovery:</label>
                    <textarea id="discovery-text-field" name="discovery"></textarea>
                    <label for="report-link">File Attachment:</label>
                    <input type="file" name="fileAttachment">
                </div>
                <button type="submit" id="create-button">Create File</button>
            </form>

2 个答案:

答案 0 :(得分:2)

您可以尝试使用multer-s3模块。

它允许您上传配置为AWS的存储文件。

此代码使用aws-sdk模块,可以找到更多关于它的配置here

这是我的代码示例:

它在Node.js中使用推荐的amazon AWS SDK for JavaScript 它还使用multer表达中间件来上传文件。

此代码也使用multer npm模块。有关其配置可能性的更多信息,例如:single,any upload.array,可以找到here字段。

答案 1 :(得分:2)

您也可以使用Minio-js这里是presigned-postpolicy.js的示例。我希望它有所帮助。

var Minio = require('minio')

var s3Client = new Minio({
  endPoint: 's3.amazonaws.com',
  accessKey: 'YOUR-ACCESSKEYID',
  secretKey: 'YOUR-SECRETACCESSKEY',
  insecure: false // Default is false.
})

// Construct a new postPolicy.
var policy = s3Client.newPostPolicy()
// Set the object name my-objectname.
policy.setKey("my-objectname")
// Set the bucket to my-bucketname.
policy.setBucket("my-bucketname")

var expires = new Date
expires.setSeconds(24 * 60 * 60 * 10) //10 days
policy.setExpires(expires)

policy.setContentLengthRange(1024, 1024*1024) // Min upload length is 1KB Max upload size is 1MB

s3Client.presignedPostPolicy(policy, function(e, formData) {
  if (e) return console.log(e)
  var curl = []
  curl.push('curl https://s3.amazonaws.com/my-bucketname')
  for (var key in formData) {
    if (formData.hasOwnProperty(key)) {
      var value = formData[key]
      curl.push(`-F ${key}=${value}`)
    }
  }
  // Print curl command to upload files.
  curl.push('-F file=@<FILE>')
  console.log(curl.join(' '))
}) 

免责声明:我在Minio工作,与AWS S3兼容的开源对象存储。