? ?? ????? ?? ??? ??? ???? ?? ?????. ??? ??, ??, ??? ? ?? ????????? ??? ???? ????? ????? ???? ???. Express? ?? Node.js? ??? ? Multer? ? ??? ???? ???? ? ??? ? ?? ??? ????? ? ?????.

? ?????? ??, ??, ?? ??, ?? ???, ???? ?? ?? ? Node.js?? Multer? ???? ? ??? ?? ??? ?? ??? ?? ????.

---

??

1. ??? ??????
2. ??
3. Express? Multer ??
4. ???? ?? ??
   • ??? ????
   • ??? ??
   • ???? ????(S3 ??)
5. ?? ??? ???
6. ?? ?? ??
7. ?? ?? ??? ??
8. Multer? ?? ??
9. ?? ?? ??
10. ??

---

??? ?????

Multer? ? ???????? ??? ????? ? ????? ???? ??? multipart/form-data? ???? ?? ???????. Express? ?? ????? ??? ?????? ??? ???? ?? ???? ???? ? ??? ???.

• ?? ???: ??? ?? ??? ???? ??? ???? ?? ?? ??? ??? ?????.
• ?? ???: ?? ??? ?? ?? ??? ?????.
• ?? ??: ??? ??? ???? ???? ?? ?? ??? ???? ? ??? ???.

??

Multer? ????? npm? ?? ?????.

npm install multer

Express? ???? Multer ??

Express ???????? Multer? ???? ?? ?? ??? ???? ???? ??? ??? ?????. ???? ??? ??? ????.

const express = require('express');
const multer = require('multer');
const app = express();

// Configure Multer for basic usage
const upload = multer({ dest: 'uploads/' }); // Destination folder for uploaded files

// Single File Upload Route
app.post('/upload', upload.single('file'), (req, res) => {
  res.send('File uploaded successfully!');
});

app.listen(3000, () => console.log('Server running on port 3000'));

? ????:

• upload.single('file'): ? ????? ? ??? ?? ???? ?? ??? ?????.
• ???? ??? uploads/ ??? ?????.

---

???? ?? ??

Multer? ? ?? ?? ?? ??? ?????.

1. ??? ???: ??? ??? ??? ?????.
2. ??? ???: ??? ?? ??? ???? ?????(????? ??? ???? ? ???).

1. ??? ????

??? ???? ???? ?? ?? ?? ? ?? ??? ? ????? ??? ? ????.

npm install multer

• ??: ?? ???? ?? ??? ?????.
• ?? ??: ?? ??? ??? ??? ? ????(?: ???? ?? ????? ??).

2. ??? ??

??? ????? ??? ??? ?????, ?? ??? ?? ???? ???? ??? ???? ?? ???? ???? ? ?????.

const express = require('express');
const multer = require('multer');
const app = express();

// Configure Multer for basic usage
const upload = multer({ dest: 'uploads/' }); // Destination folder for uploaded files

// Single File Upload Route
app.post('/upload', upload.single('file'), (req, res) => {
  res.send('File uploaded successfully!');
});

app.listen(3000, () => console.log('Server running on port 3000'));

???? ????: Multer? AWS S3

???? ??????? ?? ??? ???? ????(?: AWS S3)? ?? ???? ?? ? ?? ??? ????. S3? ????? multer-s3? ?????.

const storage = multer.diskStorage({
  destination: (req, file, cb) => cb(null, 'uploads/'), // Folder location
  filename: (req, file, cb) => {
    const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1E9);
    cb(null, uniqueSuffix + '-' + file.originalname);
  }
});

const upload = multer({ storage: storage });

const upload = multer({ storage: multer.memoryStorage() });

? ??? ?? ???? ??? ?? ??? S3 ??? ?? ??? ??????.

---

??? ?? ???

???? ??? ????? ?? ?? ??(?: ???)? ??? ? ????. fileFilter ??? ?????.

npm install aws-sdk multer-s3

?? ?? ??

??? ??? ????? ?? ????? ?? ??? ?????. ?? ??? 1MB? ???? ??? ??? ????.

const aws = require('aws-sdk');
const multerS3 = require('multer-s3');

aws.config.update({ region: 'your-region' });

const s3 = new aws.S3();

const upload = multer({
  storage: multerS3({
    s3: s3,
    bucket: 'your-s3-bucket-name',
    metadata: (req, file, cb) => cb(null, { fieldName: file.fieldname }),
    key: (req, file, cb) => cb(null, Date.now().toString() + '-' + file.originalname)
  })
});

?? ?? ??? ??

Multer? ?? ?? ???? ?????.

const fileFilter = (req, file, cb) => {
  // Accept only image files
  if (file.mimetype.startsWith('image/')) {
    cb(null, true); // Accept file
  } else {
    cb(new Error('Only image files are allowed!'), false); // Reject file
  }
};

const upload = multer({
  storage: storage,
  fileFilter: fileFilter
});

• upload.array('files', 5): ??? ??? ?? 5?? ??? ???? ? ????.
• upload.fields: ??? ?? ??? ?? ?? ??? ??????.

---

Multer? ?? ??

??? ??? ??? ???? ??? ?? ??? ?????. Multer? ??? ?? ??? ? ?? ?? ??? ??? ???? ? ????.

const upload = multer({
  storage: storage,
  limits: { fileSize: 1 * 1024 * 1024 } // 1 MB limit
});

?? ?? ??

??? Multer? ???? ?? ?? ?????????.

1. ??? ??? ???: ???? ??? ??? ????? ??? S3? ???? ?? ??? ??????? ??? ? ????.
2. ?? ???: ???? ??? ??(?: ???, PDF)? ??? ??? ? ??? ???? ?????.
3. ?????? ??? ??: ????? ?? ???? ?????, ?? ??? ??? ????, ?? ??? ? ??? ???? ???? ??? ? ????.

??

Multer? ??? ?? ??, ?? ???? ???? ?? ???? ?? ??? ????? ??? ??? ?? ??? ???? Node.js ???????? ?? ??? ??????. ??? ?? ???? ?? ??? ??? ???? ?? ??????? ???? Multer? ??????.

??? ?????! ?

? ??? Multer? ???? Node.js?? ?? ??? ??: ?? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!