使用javascript或node获取图像/文件的完整路径

Question

我有一个输入文件

<div class="form-group">
        <div class="input-group input-file">
        <span class="input-group-btn">
            <button class="btn btn-default btn-choose" type="button">Choose</button>
        </span>
            <input type="text" class="form-control" id="img" name="img" placeholder='Choose a file...' />
            <span class="input-group-btn">
             <button class="btn btn-warning btn-reset" type="button">Reset</button>
        </span>
        </div>
    </div>

我想将图像上传到mongodb，但是我需要为其提供完整的路径（即C：/Users/MyPc/Desktop/217680967585220926475.jpg到本地客户端计算机上的图像。） JS代码获取格式为blob：null / b5ae00f1-2a78-48ab-b03c-560c51184af4的图像的临时存储位置，但是mongodb无法理解。我该怎么办？

$(".input-file").before(
    function() {
        if (!$(this).prev().hasClass('input-ghost')) {
            var element = $("<input type='file' class='input-ghost' style='visibility:hidden; height:0'>");
            element.attr("name", $(this).attr("name"));
            element.change(function (event) {
                //get temporary part for node
                var tempPath = URL.createObjectURL(event.target.files[0]);

                console.log(tempPath);
                element.next(element).find('input').val(tempPath);
            });
        }
    });

后端是这张图片中的格式

相册的模型

const mongoose = require('mongoose');
const Schema = mongoose.Schema,
ObjectId = Schema.ObjectId;
 //{type: Date, required: true}
let PhotoAlbumSchema = new Schema({
title: String,
img: { _type: String, data: Buffer },
imgName: String,
albums:[
         {
             u_name: String,
             u_title: String
         }]
    }
   ,{
       timestamps: true
});

 PhotoAlbumSchema.virtual('pictureId').get(function(){
    return this._id;
});


// Export the model
module.exports = mongoose.model('PhotoAlbum', PhotoAlbumSchema);

photoalbum.controller

 const PhotoAlbum = require('../models/photoalbum.model');
 var fs = require('fs');
 var path = require('path');
 let counter = 0;

exports.photoalbum_create = function (req, res, next) {

console.log(req.body.img.data);
    var imageData = fs.readFileSync( req.body.img.data);
console.log(imageData)
    // delete req.body._id;

    let photoalbum = new PhotoAlbum(
        {
            title: req.body.title,
            img: {_type: 'image/png', data: imageData},
            imgName:  "gallery" + counter,
            albums: {u_name: req.body.albums.u_name, u_title: req.body.albums.u_title}
        }
    );

    photoalbum.save().then(img => {
        console.log("Saved an image 'jsa-header.png' to MongoDB.");
        // Find the stored image in MongoDB, then save it in '/static/assets/tmp' folder
        PhotoAlbum.findById(img, function (err, photoalbum) {
            if (err) throw err;
            try{
                fs.writeFileSync(path.join(__dirname, '../Views/assets/images/gallery' + counter + '.png'), photoalbum.img.data);
                console.log("Stored an gallery" + counter + ".png in '../Views/assets/images' folder.");
                counter++;
                // // exit node.js app
                // console.log("Exit!");
                // process.exit(0);
            }catch(e){
                console.log(e);
            }
        })
        res.send('PhotoAlbum Created successfully')
    }).catch(err => {
        console.log(err);
        throw err;
    });
  };

关于相册的路线

const express = require('express');
const router = express.Router();
//
 // Require the controllers
 const photoalbum_controller = require('../controllers/photoalbum.controller');
//
 router.post('/create', photoalbum_controller.photoalbum_create); 

 // a simple test url to check that all of our files are communicating correctly.
 router.get('/test', photoalbum_controller.test);
 module.exports = router;

不一样。所有方法都无法解决我的问题，我还没有找到如何将图像完整路径传递给nodesjs fileread，或将缓冲区从客户端发送到mongodb