Question

我正在使用 multer ， aws-sdk 和 multer-s3 包以及快递。

当用户编辑个人资料时，用户可能会更改个人资料图片/头像。

我已经通过了multer对象

multer（{存储： multer.memoryStorage（）}）。single（'profileHeroImageEdit'）

如果有当前请求的文件，那么我会将文件上传到s3存储桶，但我没有收到 upload_replace 的任何响应，其中 req.file.location 将提供S3桶的url（文件的位置）。在 upload_replace 内部，我可以获取我尝试上传的文件（ req.file ），但我希望上传文件的位置为S3存储桶。

我缺少什么？帮助将不胜感激

router.put("/:id",multer({ storage: 
multer.memoryStorage()}).single('profileHeroImageEdit'), 
middleware.checkProfileOwnership,function(req, res){
    if(isFileExists(req)==false){
        delete req.body.profileHeroImage      

     }
     else{
         console.log('file has')
         var upload_replace = multer({
            limits:{
                fileSize:MAX_FILE_SIZE,
                files:1
            },
            storage: multerS3({
                s3: photoBucket,
                bucket: BucketName,
                acl: 'public-read',
                metadata: function (req, file, cb) {
                    cb(null, { fieldName: file.fieldname });
                },
                key: function (req, file, cb) {
                    cb(null,Date.now().toString())

                }
            })
        }).single('profileHeroImageEdit') 

        upload_replace(req, res, function (err,log) {
           console.log('request log')
            console.log(req.file.location)
           console.log()
        }); 


     }
    Profile.findByIdAndUpdate(req.params.id, req.body.profile, function(err, updatedProfile){
        if (err){
            res.redirect("/profiles");
        } else {
            res.redirect("/profiles/" + req.params.id);
        }
    });
});

function isFileExists(request){
    if(request.file)
    {
        return true 
    }
    else{
        return false
    }
}

Answer 1

我有使用multer和aws-sdk的完整代码

包括此文件，然后npm全部安装

//aws s3 packages
const aws = require("aws-sdk");
const multerS3 = require("multer-s3");
const multer = require("multer");
const path = require("path");

然后

//profile image upload start
const s3 = new aws.S3({
  accessKeyId: "***",
  secretAccessKey: "***",
  Bucket: "***"
});

//Singe profile image upload

const profileImgUpload = multer({
  storage: multerS3({
    s3: s3,
    bucket: "***",
    acl: "public-read",
    key: function(req, file, cb) {
      cb(
        null,
        path.basename(file.originalname, path.extname(file.originalname)) +
          "-" +
          Date.now() +
          path.extname(file.originalname)
      );
    }
  }),
  limits: { fileSize: 2000000 }, // In bytes: 2000000 bytes = 2 MB
  fileFilter: function(req, file, cb) {
    checkFileType(file, cb);
  }
}).single("profileImage");

// getExtension of file by this function
function getExtension(filename) {
  var parts = filename.split(".");
  return parts[parts.length - 1];
}

//checkfile type of input function
function checkFileType(file, cb) {
  const ext = getExtension(file.originalname);
  switch (ext.toLowerCase()) {
    case "jpeg":
    case "jpg":
    case "png":
    case "gif":
      return cb(null, true);
  }
  cb("Error: Images Only!");
}

router.post(
  "/image",
  passport.authenticate("jwt", { session: false }),
  (req, res) => {
    profileImgUpload(req, res, error => {
      if (error) {
        res.json({ error: error });
      } else {
        //here we can get req.body
        const userDp = {};

        //end of getting values

        // If File not found then dont store anything
        if (req.file !== undefined) userDp.dpUrl = req.file.location;
        // Save the file name into database into profile model

        User.findOne({ email: req.user.email }).then(user => {
          if (user) {
            // Update
            User.findOneAndUpdate(
              { email: req.user.email },
              { $set: userDp },
              { new: true }
            ).then(user => res.json(user));
          } else {
            res.json({ msg: "not able not update data" });
          }
        });
      }
    });
  }
);

3。需要使用

从反应前端发送数据

const data = new Formdata();
data.append()

，并且还包括标头

Answer 2

添加一个侦听器，用于完成将照片上传到S3的OutgoingMessage。 on-finished库对此非常方便。

const onFinished = require('on-finished');
const print = process._rawDebug;

uploadReplace(req, null, function (err) {
  onFinished(req, function () {
    if (err) print(err);
    print(req.file.location);
    // Other things can be done here
  })
});

Amazon S3存储桶文件上载响应不可用

2 个答案: