Nodejs Amazon S3文件上传

cphill 发表于 Dev

cphill

我正在尝试创建一个将本地文件上传到S3存储桶的表单，但是我对上传逻辑的某些部分应该存在的位置有些困惑。我想保持POST路由整洁，并引用存放在单独文件中的AWS逻辑，但是对于应该为params级别的Body属性使用哪个值以及如何引用此模块，我有些困惑在该fileAttachment行上将完整的上载URL设置为我的数据库属性时。谁能指出我正确的方向？

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>

塔尔·阿维萨（Tal Avissar）

您可以尝试使用multer-s3模块。

它允许您将配置为storaage的文件上传到AWS。

该代码使用aws-sdk模块，有关其配置的更多信息，请参见此处。

这是我的代码示例：

它使用带有Node.js的JavaScript的推荐的Amazon AWS开发工具包（SDK），还使用multer express中间件来上传文件。

var aws = require('aws-sdk')
var express = require('express')
var multer = require('multer')
var multerS3 = require('multer-s3')

var app = express()
var s3 = new aws.S3({ {accessKeyId: 'akid', secretAccessKey: 'secret'}) 
//this can also be configured in config file and through code



var upload = multer({
  storage: multerS3({
    s3: s3,
    bucket: 'some-bucket',
    key: function (req, file, cb) {
      cb(null, Date.now().toString())
    }
  })
})

//the upload.array -means that you can load multiple files(max 3) named photos maximum 3,  the resulting AWS full path urls will be returned in req.files 
app.post('/upload', upload.array('photos', 3), function(req, res, next) {
  //reference results that can be stored in database for example in req.files
  res.send('Successfully uploaded ' + req.files.length + ' files!')
})