Js를 Typescript로

sudo npm install -g typescript
npm init -y
npm install typescript

터미널에 타입스크립트 라이브러리 설치

---

tsconfig.ts 파일 생성

{
    "compilerOptions": {
      "target": "ES6",
      "module": "commonjs",
      "outDir": "./dist",
      "strict": true
    },
    "include": ["index.ts"]
}

---

index.ts로 확장자 수정 후 문법 수정

//기존 index.js
const { Console, table } = require('console');
const express = require('express');
const app = express();
const port = 2000;

//미들웨어 
app.use(express.json());
app.use(express.urlencoded({extends: true}));

const mysql = require('mysql2/promise');
const pool = mysql.createPool({
    host: 'localhost',
    port: '3306',
    user: 'root',
    password: 'abcd1234',
    database: 'userdb'
});

const getConn = async() => {
    return await pool.getConnection(async (conn) => conn);
}

app.listen(port, ()=>{
    console.log(`${port}에서 실행 중`)
});

// sp로 데이터 삽입
app.get("/:qureyname/:tablename/:id/:name", async (req, res) => {
    const qureyname = req.params.qureyname;
    const tablename = req.params.tablename;
    const id = req.params.id;
    const name = req.params.name;
    const conn = await getConn();
    
    if (qureyname == "insert"){
    const value = [tablename, id, name];
    const query = 'call dataprocess("insert", ?, ?, ?);';
    try {
        const [rows] = await conn.query(query, value); 
        conn.release();
        res.send(rows);
        } catch (error) {
        console.error(error);
        res.status(500).json("검색 실패");
        } finally {
        conn.release();
        }
    }
});

// sp로 데이터 조회
app.get("/:qureyname/:tablename", async (req, res) => {
    const qureyname = req.params.qureyname;
    const tablename = req.params.tablename;
    const conn = await getConn();
    if(qureyname == "select"){
        const query = "call dataprocess('select' , ? , NULL, NULL);";
        try {
            const [rows] = await conn.query(query, [tablename]); 
            conn.release();
            res.send(rows);
          } catch (error) {
            console.error(error);
            res.status(500).json("검색 실패");
          } finally {
            conn.release();
          }
    }
});

//index.ts로 확장자 수정 후 코드

import * as express from 'express';
import { Request, Response } from 'express';
const app = express();
const port = 2000;

app.use(express.json());
app.use(express.urlencoded({ extended: true }));

app.listen(port, () => {
  console.log(`${port}에서 실행 중`);
});

//미들웨어 
app.use(express.json());
app.use(express.urlencoded({extended: true}));

const mysql = require('mysql2/promise');
const pool = mysql.createPool({
    host: 'localhost',
    port: '3306',
    user: 'root',
    password: 'abcd1234',
    database: 'userdb'
});

const getConn = async() => {
    return await pool.getConnection(async (conn: any) => conn);
}

app.get("/:qureyname/:tablename/:id/:name", async (req: Request, res: Response) => {
  const qureyname = req.params.qureyname;
  const tablename = req.params.tablename;
  const id = req.params.id;
  const name = req.params.name;
  const conn = await getConn();

  if (qureyname == "insert") {
    const value = [tablename, id, name];
    const query = 'call dataprocess("insert", ?, ?, ?);';
    try {
      const [rows] = await conn.query(query, value);
      conn.release();
      res.send(rows);
    } catch (error) {
      console.error(error);
      res.status(500).json("검색 실패");
    } finally {
      conn.release();
    }
  }
});

// sp로 데이터 조회
app.get("/:qureyname/:tablename", async (req: Request, res: Response) => {
    const qureyname = req.params.qureyname;
    const tablename = req.params.tablename;
    const conn = await getConn();
    if(qureyname == "select"){
        const query = "call dataprocess('select' , ? , NULL, NULL);";
        try {
            const [rows] = await conn.query(query, [tablename]); 
            conn.release();
            res.send(rows);
            } catch (error) {
            console.error(error);
            res.status(500).json("검색 실패");
            } finally {
            conn.release();
            }
    }
});

---

터미널에서

npx tsc

tsc index.ts

입력 하면 자동으로 index.js가 생겼을 것이다.

//index.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (g && (g = 0, op[0] && (_ = 0)), _) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
Object.defineProperty(exports, "__esModule", { value: true });
var express = require("express");
var app = express();
var port = 2000;
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.listen(port, function () {
    console.log("".concat(port, "\uC5D0\uC11C \uC2E4\uD589 \uC911"));
});
//미들웨어 
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
var mysql = require('mysql2/promise');
var pool = mysql.createPool({
    host: 'localhost',
    port: '3306',
    user: 'root',
    password: 'abcd1234',
    database: 'userdb'
});
var getConn = function () { return __awaiter(void 0, void 0, void 0, function () {
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0: return [4 /*yield*/, pool.getConnection(function (conn) { return __awaiter(void 0, void 0, void 0, function () { return __generator(this, function (_a) {
                    return [2 /*return*/, conn];
                }); }); })];
            case 1: return [2 /*return*/, _a.sent()];
        }
    });
}); };
app.get("/:qureyname/:tablename/:id/:name", function (req, res) { return __awaiter(void 0, void 0, void 0, function () {
    var qureyname, tablename, id, name, conn, value, query, rows, error_1;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                qureyname = req.params.qureyname;
                tablename = req.params.tablename;
                id = req.params.id;
                name = req.params.name;
                return [4 /*yield*/, getConn()];
            case 1:
                conn = _a.sent();
                if (!(qureyname == "insert")) return [3 /*break*/, 6];
                value = [tablename, id, name];
                query = 'call dataprocess("insert", ?, ?, ?);';
                _a.label = 2;
            case 2:
                _a.trys.push([2, 4, 5, 6]);
                return [4 /*yield*/, conn.query(query, value)];
            case 3:
                rows = (_a.sent())[0];
                conn.release();
                res.send(rows);
                return [3 /*break*/, 6];
            case 4:
                error_1 = _a.sent();
                console.error(error_1);
                res.status(500).json("검색 실패");
                return [3 /*break*/, 6];
            case 5:
                conn.release();
                return [7 /*endfinally*/];
            case 6: return [2 /*return*/];
        }
    });
}); });
// sp로 데이터 조회
app.get("/:qureyname/:tablename", function (req, res) { return __awaiter(void 0, void 0, void 0, function () {
    var qureyname, tablename, conn, query, rows, error_2;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                qureyname = req.params.qureyname;
                tablename = req.params.tablename;
                return [4 /*yield*/, getConn()];
            case 1:
                conn = _a.sent();
                if (!(qureyname == "select")) return [3 /*break*/, 6];
                query = "call dataprocess('select' , ? , NULL, NULL);";
                _a.label = 2;
            case 2:
                _a.trys.push([2, 4, 5, 6]);
                return [4 /*yield*/, conn.query(query, [tablename])];
            case 3:
                rows = (_a.sent())[0];
                conn.release();
                res.send(rows);
                return [3 /*break*/, 6];
            case 4:
                error_2 = _a.sent();
                console.error(error_2);
                res.status(500).json("검색 실패");
                return [3 /*break*/, 6];
            case 5:
                conn.release();
                return [7 /*endfinally*/];
            case 6: return [2 /*return*/];
        }
    });
}); });

터미널에 입력하여 실행

node index.js

기존과 동일하게 잘 실행이 된다.