egg實現登錄鑒權（二）：連接數據庫（mysql）

前一篇實現了基本的生成token和驗證token的功能，這其實並沒什么用。這一篇主要實現對數據庫里的人員進行驗證。

需求

• 登錄：查詢數據庫的user表驗證該人員是否存在

• user表中存在該nickname，生成token返回
• user表中不存在該nickname，返回{code:'404',msg:'不存在該人員'}

• 查詢

• 查詢所有user，無需傳token
• 通過id查詢指定user，需要傳token

• 狀態碼

• 201：成功
• 404：不存在
• 400：業務邏輯錯誤

實現

• 數據庫表沒有變，依舊只有一張user表

• 數據庫名稱（database）：test，用戶名（user）：root，密碼（password）：123456
• 

• 在egg實現登錄鑒權（一）的基礎之上繼續安裝依賴包

• npm install --save egg-cors egg-jwt

• 目錄

• 

• config/config.default.js

 

/* eslint valid-jsdoc: "off" */

'use strict';

/**
 * @param {Egg.EggAppInfo} appInfo app info
 */
module.exports = appInfo => {
  /**
   * built-in config
   * @type {Egg.EggAppConfig}
   **/
  const config = exports = {};

  // use for cookie sign key, should change to your own and keep security
  config.keys = appInfo.name + '_1576461360545_5788';

  // add your middleware config here
  config.middleware = [];
  config.jwt = {
    secret: '123456',
  };
  // 安全配置 （https://eggjs.org/zh-cn/core/security.html）
  config.security = {
    csrf: {
      enable: false,
      ignoreJSON: true,
    },
    // 允許訪問接口的白名單
    domainWhiteList: [ 'http://localhost:8080' ],
  };
  // 跨域配置
  config.cors = {
    origin: '*',
    allowMethods: 'GET,HEAD,PUT,POST,DELETE,PATCH',
  };
  config.sequelize = {
    dialect: 'mysql',
    host: '127.0.0.1',
    port: '3306',
    user: 'root',
    password: '123456',
    database: 'test',
    define: {
      underscored: true,
      freezeTableName: true,
    },
  };
  // add your user config here
  const userConfig = {
    // myAppName: 'egg',
  };

  return {
    ...config,
    ...userConfig,
  };
};

 

 

• config/plugin.js

 

'use strict';

/** @type Egg.EggPlugin */
module.exports = {
  jwt: {
    enable: true,
    package: 'egg-jwt',
  },
  cors: {
    enable: true,
    package: 'egg-cors',
  },
  sequelize: {
    enable: true,
    package: 'egg-sequelize',
  },
};

 

 

• app/model/user.js

 

'use strict';

module.exports = app => {
  const { STRING, INTEGER } = app.Sequelize;
  const User = app.model.define('user', {
    id: { type: INTEGER, primaryKey: true, autoIncrement: true },
    nickname: STRING(20),
  }, {
    timestamps: false,
  });
  return User;
};
 

 

• app/controller/user.js

 

'use strict';

const Controller = require('egg').Controller;


class UserController extends Controller {
  // 登錄
  async login() {
    const { ctx, app } = this;
    const data = ctx.request.body;
    // 判斷該用戶是否存在
    const isValid = await ctx.service.user.isValidUser('nickname', data.nickname);
    if (isValid) {
      const token = app.jwt.sign({
        nickname: data.nickname,
      }, app.config.jwt.secret);
      ctx.body = token;
    } else {
      ctx.body = { code: 404, msg: '不存在該用戶' };
    }
  }
  // 獲取所有用戶
  async index() {
    const { ctx } = this;
    ctx.body = await ctx.service.user.getUser();
  }
  // 通過id獲取用戶
  async show() {
    const { ctx } = this;
    ctx.body = await ctx.service.user.getUser(ctx.params.id);
  }
}

module.exports = UserController;

 

 

• app/service/user.js

 

'use strict';

const Service = require('egg').Service;

function toInt(str) {
  if (typeof str === 'number') return str;
  if (!str) return str;
  return parseInt(str, 10) || 0;
}

class UserService extends Service {
  // 查詢test數據庫user表，驗證是否存在該用戶
  async isValidUser(key, value) {
    const data = await this.getUser();
    for (const item of data) {
      if (item[key] === value) return true;
    }
    return false;
  }
  // 獲取用戶，不傳id則查詢所有
  async getUser(id) {
    const { ctx } = this;
    const query = { limit: toInt(ctx.query.limit), offset: toInt(ctx.query.offset) };
    if (id) {
      return await ctx.model.User.findByPk(toInt(id));
    }
    return await ctx.model.User.findAll(query);
  }
}
module.exports = UserService;

 

• app/router.js

 

'use strict';

/**
 * @param {Egg.Application} app - egg application
 */
module.exports = app => {
  const { router, controller, jwt } = app;
  router.get('/', controller.home.index);

  router.post('/user/login', controller.user.login);
  // 查詢 不做鑒權
  router.get('/user', controller.user.index);
  router.get('/user/:id',jwt, controller.user.show);
};

 

• package.json

{
  "name": "jwt",
  "version": "1.0.0",
  "description": "",
  "private": true,
  "egg": {
    "declarations": true
  },
  "dependencies": {
    "egg": "^2.15.1",
    "egg-cors": "^2.2.3",
    "egg-jwt": "^3.1.7",
    "egg-scripts": "^2.11.0",
    "egg-sequelize": "^5.2.0",
    "mysql2": "^2.0.2"
  },
  "devDependencies": {
    "autod": "^3.0.1",
    "autod-egg": "^1.1.0",
    "egg-bin": "^4.11.0",
    "egg-ci": "^1.11.0",
    "egg-mock": "^3.21.0",
    "eslint": "^5.13.0",
    "eslint-config-egg": "^7.1.0"
  },
  "engines": {
    "node": ">=10.0.0"
  },
  "scripts": {
    "start": "egg-scripts start --daemon --title=egg-server-jwt",
    "stop": "egg-scripts stop --title=egg-server-jwt",
    "dev": "egg-bin dev",
    "debug": "egg-bin debug",
    "test": "npm run lint -- --fix && npm run test-local",
    "test-local": "egg-bin test",
    "cov": "egg-bin cov",
    "lint": "eslint .",
    "ci": "npm run lint && npm run cov",
    "autod": "autod"
  },
  "ci": {
    "version": "10"
  },
  "repository": {
    "type": "git",
    "url": ""
  },
  "author": "",
  "license": "MIT"
}

 

自測

• 登錄

　　　

• 查詢所有
• 

• 查詢指定id的人員
• 

   

   

參考

• egg+sequelize+mysql實現CRUD
• egg實現登錄鑒權（一）：生成token