53

我不知道自己做错了什么，这就是我所拥有的：

HTML

<html>
<body>
    <form method="POST" action="/upload" enctype="multipart/form-data">
        <div class="field">
            <label for="image">Image Upload</label>
            <input type="file" name="image" id="image">
        </div>
        <input type="submit" class="btn" value="Save">
    </form>
</body>
</html>

Port5000 是我的Node.js服务器的端口。

在这个例子中，我使用POSTto /upload，它工作正常。

module.exports = function(app, models) {

    var fs = require('fs');
    var AWS = require('aws-sdk');
    var accessKeyId =  process.env.AWS_ACCESS_KEY || "xxxxxx";
    var secretAccessKey = process.env.AWS_SECRET_KEY || "+xxxxxx+B+xxxxxxx";

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

    var s3 = new AWS.S3();

    app.post('/upload', function(req, res){

        var params = {
            Bucket: 'makersquest',
            Key: 'myKey1234.png',
            Body: "Hello"
        };

        s3.putObject(params, function (perr, pres) {
            if (perr) {
                console.log("Error uploading data: ", perr);
            } else {
                console.log("Successfully uploaded data to myBucket/myKey");
            }
        });
    });

}

现在我想发布我正在POST处理的文件，这就是问题出现的地方。

module.exports = function(app, models) {

    var fs = require('fs');
    var AWS = require('aws-sdk');
    var accessKeyId =  process.env.AWS_ACCESS_KEY || "xxxxxx";
    var secretAccessKey = process.env.AWS_SECRET_KEY || "+xxxxxx+B+xxxxxxx";

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

    var s3 = new AWS.S3();

    app.post('/upload', function(req, res){
        var path = req.files.image.path;
        fs.readFile(path, function(err, file_buffer){
            var params = {
                Bucket: 'makersquest',
                Key: 'myKey1234.png',
                Body: file_buffer
            };

            s3.putObject(params, function (perr, pres) {
                if (perr) {
                    console.log("Error uploading data: ", perr);
                } else {
                    console.log("Successfully uploaded data to myBucket/myKey");
                }
            });
        });
    });
}

我得到的错误是：

TypeError：无法读取未定义的属性“路径”

事实上files是完全空的。

我假设我错过了一些非常明显的东西，但我似乎找不到它。

4

5 回答 5

39

您将需要类似multer处理分段上传的东西。这是一个使用aws-sdk.

var multer = require('multer');
var AWS = require('aws-sdk');

var accessKeyId =  process.env.AWS_ACCESS_KEY || "xxxxxx";
var secretAccessKey = process.env.AWS_SECRET_KEY || "+xxxxxx+B+xxxxxxx";

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

var s3 = new AWS.S3();

app.use(multer({ // https://github.com/expressjs/multer
  dest: './public/uploads/', 
  limits : { fileSize:100000 },
  rename: function (fieldname, filename) {
    return filename.replace(/\W+/g, '-').toLowerCase();
  },
  onFileUploadData: function (file, data, req, res) {
    // file : { fieldname, originalname, name, encoding, mimetype, path, extension, size, truncated, buffer }
    var params = {
      Bucket: 'makersquest',
      Key: file.name,
      Body: data
    };

    s3.putObject(params, function (perr, pres) {
      if (perr) {
        console.log("Error uploading data: ", perr);
      } else {
        console.log("Successfully uploaded data to myBucket/myKey");
      }
    });
  }
}));

app.post('/upload', function(req, res){
    if(req.files.image !== undefined){ // `image` is the field name from your form
        res.redirect("/uploads"); // success
    }else{
        res.send("error, no file chosen");
    }
});
于 2015-03-18T21:36:33.087 回答
35

最新答案@ Dec-2016 [新]

使用multer-s3分段上传到 s3 而不保存在本地磁盘上：

var express = require('express'),
    aws = require('aws-sdk'),
    bodyParser = require('body-parser'),
    multer = require('multer'),
    multerS3 = require('multer-s3');

aws.config.update({
    secretAccessKey: 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',
    accessKeyId: 'XXXXXXXXXXXXXXX',
    region: 'us-east-1'
});

var app = express(),
    s3 = new aws.S3();

app.use(bodyParser.json());

var upload = multer({
    storage: multerS3({
        s3: s3,
        bucket: 'bucket-name',
        key: function (req, file, cb) {
            console.log(file);
            cb(null, file.originalname); //use Date.now() for unique file keys
        }
    })
});

//open in browser to see upload form
app.get('/', function (req, res) {
    res.sendFile(__dirname + '/index.html');
});

//use by upload form
app.post('/upload', upload.array('upl',1), function (req, res, next) {
    res.send("Uploaded!");
});

app.listen(3000, function () {
    console.log('Example app listening on port 3000!');
});

最新答案@ Mar-2016 [旧版]

编辑了 1 次 使用 multer@1.1.0 和 multer-s3@1.4.1 以下代码段：

var express = require('express'),
    bodyParser = require('body-parser'),
    multer = require('multer'),
    s3 = require('multer-s3');

var app = express();

app.use(bodyParser.json());

var upload = multer({
    storage: s3({
        dirname: '/',
        bucket: 'bucket-name',
        secretAccessKey: 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',
        accessKeyId: 'XXXXXXXXXXXXXXX',
        region: 'us-east-1',
        filename: function (req, file, cb) {
            cb(null, file.originalname); //use Date.now() for unique file keys
        }
    })
});

//open in browser to see upload form
app.get('/', function (req, res) {
    res.sendFile(__dirname + '/index.html');
});

//use by upload form
app.post('/upload', upload.array('upl'), function (req, res, next) {
    res.send("Uploaded!");
});

app.listen(3000, function () {
    console.log('Example app listening on port 3000!');
});

对于完整的运行示例，请克隆express_multer_s3 存储库并运行node app。

于 2016-03-09T20:49:39.457 回答
28

无需 Multer 的简单 S3 文件上传

var express = require('express')
const fileUpload = require('express-fileupload');
const app = express();

app.use(fileUpload());


var AWS = require('aws-sdk');

app.post('/imageUpload', async (req, res) => {
    AWS.config.update({
        accessKeyId: "ACCESS-KEY", // Access key ID
        secretAccesskey: "SECRET-ACCESS-KEY", // Secret access key
        region: "us-east-1" //Region
    })


    const s3 = new AWS.S3();

    // Binary data base64
    const fileContent  = Buffer.from(req.files.uploadedFileName.data, 'binary');

    // Setting up S3 upload parameters
    const params = {
        Bucket: 'BUKET-NAME',
        Key: "test.jpg", // File name you want to save as in S3
        Body: fileContent 
    };

    // Uploading files to the bucket
    s3.upload(params, function(err, data) {
        if (err) {
            throw err;
        }
        res.send({
            "response_code": 200,
            "response_message": "Success",
            "response_data": data
        });
    });

})

app.listen(3000, function () {
    console.log('Example app listening on port 3000!');
});
于 2020-04-30T15:43:14.643 回答
1

您需要在您的中间件集中使用类似multermultipart/form-data的东西来为您处理和填充req.files. 从多科：

var express = require('express')
var multer  = require('multer')

var app = express()
app.use(multer({ dest: './uploads/'}))

现在req.files.image.path应该填充到您的app.post函数中。

于 2014-10-16T21:41:34.237 回答
0

这个堆栈溢出是我找到的最好的答案，它准确地解释了如何让 Node 到 S3 工作。

当我尝试向我的 S3 存储桶（Node.js）发送内容时，AWS 缺少凭据

除了我必须破解的其他一些东西之外，我还必须破解它才能使其全部正常工作。在我的情况下，我使用的是 MEAN 堆栈应用程序，所以我正在使用的 Node 文件是一个路由文件。

我的带有亚马逊凭据的 aconfig.json 文件如下所示：

{ "accessKeyId": "*****YourAccessKey****", "secretAccessKey": "***YourSecretKey****" }

路由文件的最终内容类似于下面粘贴的文件。

router.post('/sendToS3', function(req, res) {

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

var awsCredFile = path.join(__dirname, '.', 'aconfig.json');

console.log('awsCredFile is');
console.log(awsCredFile);

AWS.config.loadFromPath(awsCredFile);

var s3 = new AWS.S3();

var photoBucket = new AWS.S3({params: {Bucket: 'myGreatBucketName'}});

var sampleFile = {
    "_id" : 345345,
    "fieldname" : "uploads[]",
    "originalname" : "IMG_1030.JPG",
    "encoding" : "7bit",
    "mimetype" : "image/jpeg",
    "destination" : "./public/images/uploads",
    "filename" : "31a66c51883595e74ab7ae5e66fb2ab8",
    "path" : "/images/uploads/31a66c51883595e74ab7ae5e66fb2ab8",
    "size" : 251556,
    "user" : "579fbe61adac4a8a73b6f508"
};

var filePathToSend = path.join(__dirname, '../public', sampleFile.path);


function uploadToS3(filepath, destFileName, callback) {
    photoBucket
        .upload({
            ACL: 'public-read',
            Body: fs.createReadStream(filepath),
            Key: destFileName.toString(),
            ContentType: 'application/octet-stream' // force download if it's accessed as a top location
        })
        // http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3/ManagedUpload.html#httpUploadProgress-event
        .on('httpUploadProgress', function(evt) { console.log(evt); })
        // http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3/ManagedUpload.html#send-property
        .send(callback);
}

multer({limits: {fileSize:10*1024*1024}});

console.log('filePathToSend is ');
console.log(filePathToSend);

uploadToS3(filePathToSend, sampleFile.filename, function (err, data) {
    if (err) {
        console.error(err);
        return res.status(500).send('failed to upload to s3').end();
    }
    res.status(200)
        .send('File uploaded to S3: '
            + data.Location.replace(/</g, '&lt;')
            + '<br/><img src="' + data.Location.replace(/"/g, '&quot;') + '"/>')
        .end();
});

console.log('uploading now...');

});

我花了一段时间才终于开始工作，但是如果您设置下面的路线，请更新 sampleFile JSON 以指向您系统上的真实文件并使用 Postman 打它，它会将文件发布到您的 S3 帐户。

希望这可以帮助

于 2016-08-12T16:41:00.500 回答