Node.js, Multer ? PostgreSQL? ???? ??? ??? ??? API ??

? ????? Node.js, Multer ? PostgreSQL? ???? ?? ? ?? ??? ??? ??? ???? ???? ???? ?? API? ???? ??? ?????. ??? ?? ?? ??? ???? ?????? ??? ?? ??? ? ????.

?? ??:

• Node.js? PostgreSQL? ?? ? ???????.
• Node.js ? PostgreSQL? ?? ??? ?????.
• API ???? ?? Postman.

???? ??:

1. ???? ???? ?? ? ???:

   mkdir imageUpload
   cd imageUpload
   npm init -y

2. ??? ??:

   npm install express multer body-parser pg

3. ???? ?? ???:

   <code>imageUpload/
   ├── index.js
   ├── images/
   ├── db/
   │   └── db.js
   └── routes/
       └── image_routes.js
   └── controllers/
       └── upload.js</code>

4. PostgreSQL ?????? ? ??? ??? ??:

   CREATE DATABASE uploader;
   CREATE TABLE users (id SERIAL PRIMARY KEY, name VARCHAR(50) NOT NULL, icon VARCHAR NOT NULL);

?? ??:

1. ?????? ??(db.js):

   const { Client } = require('pg');
   const client = new Client({
       user: 'postgres',
       host: 'localhost',
       database: 'uploader',
       password: 'YOUR_PASSWORD', // 請?zhí)鎿Q為您的數(shù)據(jù)庫密碼
       port: 5432,
   });
   client.connect().then(() => console.log("Connected to DB")).catch(err => console.error("數(shù)據(jù)庫連接失敗:", err.message));
   module.exports = client;

2. ????? ??(index.js):

   const express = require('express');
   const bodyParser = require('body-parser');
   const app = express();
   const port = process.env.PORT || 4000;
   
   app.use(bodyParser.json());
   app.use(bodyParser.urlencoded({ extended: true }));
   app.use('/images', express.static('images')); // 設(shè)置靜態(tài)文件目錄
   
   require('./routes/image_routes')(app);
   
   app.listen(port, () => {
       console.log(`服務(wù)器運(yùn)行在端口 ${port}`);
   });

3. ?? ??(image_routes.js):

   const express = require('express');
   const uploadController = require('../controllers/upload');
   
   module.exports = (app) => {
       app.post('/upload/single', uploadController.upload.single('icon'), uploadController.uploadSingleImage);
       app.post('/upload/multiple', uploadController.upload.array('icon', 12), uploadController.uploadMultipleImage);
   };

4. ??? ??? ????(upload.js):

   const multer = require('multer');
   const path = require('path');
   const client = require('../db/db');
   
   const storage = multer.diskStorage({
       destination: (req, file, cb) => cb(null, './images'),
       filename: (req, file, cb) => cb(null, `image-${Date.now()}${path.extname(file.originalname)}`),
   });
   
   const fileFilter = (req, file, cb) => {
       if (!file.originalname.match(/\.(jpg|jpeg|png)$/i)) {
           return cb(new Error('請上傳 JPG, JPEG 或 PNG 格式的圖片'), false);
       }
       cb(null, true);
   };
   
   exports.upload = multer({ storage, fileFilter });
   
   exports.uploadSingleImage = async (req, res) => {
       try {
           await client.query(`INSERT INTO users (name, icon) VALUES ('${req.body.name}', '${req.file.filename}')`);
           res.json({ statusCode: 200, status: true, message: '圖片上傳成功' });
       } catch (error) {
           console.error("圖片上傳失敗:", error);
           res.status(500).json({ statusCode: 500, status: false, message: '圖片上傳失敗' });
       }
   };
   
   exports.uploadMultipleImage = async (req, res) => {
       try {
           for (const file of req.files) {
               await client.query(`INSERT INTO users (name, icon) VALUES ('${req.body.name}', '${file.filename}')`);
           }
           res.json({ statusCode: 200, status: true, message: '所有圖片上傳成功' });
       } catch (error) {
           console.error("圖片上傳失敗:", error);
           res.status(500).json({ statusCode: 500, status: false, message: '圖片上傳失敗' });
       }
   };
   

???:

Postman? ???? ??? ??? ??? ?? ???? ???? /upload/single ?? /upload/multiple? POST ??? ????.

? ??? YOUR_PASSWORD? PostgreSQL ?????? ????? ??? ??? ?? ?????. ? ??? ?? ???? ???? ?? ?? ??? ???????. ??? ?? ??? ?? ???????. ????? ??? ?? images? ???? ? ??? ???? ?? ?? ???.

? ??? ??? ?? ?? ? ??? ???? ???? ?? ???? ??? ???? ?????. YOUR_PASSWORD? ?? ?? ???? ?? ?? ???? ?????.

? ??? multer (postgresql)? ???? ???? ????? ?? Nodejs Express REST API? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!