我正在尝试使用multer和multer-grid-fs-storage将.zip文件上传到MongoDb Atlas。
它可以正常编译,但是什么也没有上传到我的集群中。
我曾尝试将文件保存到磁盘存储中,然后直接发送到MongoDB,但都无法正常工作。
我正在测试失眠症。请求状态为200(正常),但是未上传任何内容。当我console.log req.file时,它表示未定义;当我登录req.body时,它记录一个空对象(即{})。
const db = require('./db/index.js')
db.on('error', console.error.bind(console, 'MongoDB connection error:'))
require('dotenv').config();
const app = express();
const userRouter = require('./routes/user-routes')
app.use('/api', userRouter)
const fileRouter = require('./routes/file-routes')
app.use('/file', fileRouter)
const db = require('../db/index.js')
const fs = require('fs');
const path = require('path');
const multer = require('multer');
const GridFsStorage = require('multer-gridfs-storage')
const storage = new GridFsStorage({
db: db,
file: (req, file) => {
return {
filename: file.originalname
}
}
});
// const storage = multer.diskStorage({
// destination: (req, file, cb) => {
// const uploadDir= path.join (__dirname, "..", "uploads", "zip" `${Date.now()}`)
// // fs.mkdirSync(zip)
// cd (null, uploadDir)
// },
// filename: (req, file, cb) => {
// cb(null, file.originalname)
// }
// })
// sets file input to single file
const singleUpload = multer({ storage: storage }).single('file');
const getFiles = (req, res) => {
gfs.files.find({ filename: req.params.filename }).toArray((err, files) => {
if(!files || files.length === 0){
return res.status(404).json({
message: "Could not find file"
});
}
var readstream = gfs.createReadStream({
filename: files[0].filename
})
res.set('Content-Type', files[0].contentType);
return readstream.pipe(res);
});
};
const postFiles = (req, res) => {
res.send({ success: true });
console.log(req.file)
};
module.exports = {
storage,
singleUpload,
getFiles,
postFiles,
// getFiles2,
// deleteFiles
}
const express = require('express')
const FileCtrl = require('../controllers/file-ctrl')
const router = express.Router()
router.get('/getFiles', FileCtrl.getFiles)
router.get('/getFiles2', FileCtrl.getFiles2)
router.post('/postFiles', FileCtrl.singleUpload, FileCtrl.postFiles)
router.post('/deleteFiles', FileCtrl.deleteFiles)
module.exports = router;
const mongoose = require('mongoose')
mongoose
.connect('mongodb+srv://Nancelot:Archer212@cluster0-3d7n6.gcp.mongodb.net/test?retryWrites=true&w=majority', { useNewUrlParser: true })
.catch(e => {
console.error('Connection error', e.message)
})
const db = mongoose.connection
module.exports = db
注释掉的存储器存储对象是我也尝试过的磁盘存储。都没用
答案 0 :(得分:1)
我不确定,这可能是您的问题所在,实际上对我有用。我使用“文件”键在正文中发送.csv文件。 但是我不得不重写您的get函数,以取回那些文件。
const getFiles = (req, res) => {
const gfs = new mongoose.mongo.GridFSBucket(mongoose.connections[0].db);
gfs.find({}).toArray((err, files) => {
if (!files || files.length === 0) {
return res.status(404).json({
message: 'Could not find file',
});
}
var readstream = gfs.openDownloadStream(files[0]._id);
res.set('Content-Type', files[0].contentType);
return readstream.pipe(res);
});
};
...并且我建议像这样等待mongo连接打开(这可能是个问题) app.js:
const express = require('express');
const db = require('./db/index.js');
const mongoose = require('mongoose');
db.on('error', console.error.bind(console, 'MongoDB connection error:'));
require('dotenv').config();
const app = express();
const run = () =>
app.listen(3000, () => {
console.log(`Server running on http://localhost:3000/`);
});
const fileRouter = require('./routes/file-routes.js');
app.use('/file', fileRouter);
mongoose.connection.once('open', run);