├── .gitignore
├── schemas.js
├── package.json
├── middleware.js
└── app.js


/.gitignore:
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1 | node_modules


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/schemas.js:
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 1 | const Joi = require('joi');
 2 | 
 3 | const schemas = {
 4 |   blogPOST: Joi.object().keys({
 5 |     title: Joi.string().required(),
 6 |     description: Joi.string().required(),
 7 |     year: Joi.number()
 8 |   }),
 9 |   blogLIST: {
10 |     page: Joi.number().required(),
11 |     pageSize: Joi.number().required()
12 |   },
13 |   blogDETAIL: {
14 |     id: Joi.number().min(1).required()
15 |   }
16 | };
17 | 
18 | module.exports = schemas;


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/package.json:
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 1 | {
 2 |   "name": "joi-example",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "start": "nodemon app.js",
 8 |     "test": "echo \"Error: no test specified\" && exit 1"
 9 |   },
10 |   "author": "",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "body-parser": "^1.18.3",
14 |     "cors": "^2.8.5",
15 |     "express": "^4.16.4",
16 |     "joi": "^14.3.1",
17 |     "nodemon": "^1.18.9"
18 |   }
19 | }
20 | 


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/middleware.js:
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 1 | const Joi = require('joi');
 2 | 
 3 | const middleware = (schema, property) => {
 4 |   return (req, res, next) => {
 5 | 
 6 |     const { error } = Joi.validate(req[property], schema);
 7 | 
 8 |     const valid = error == null;
 9 |     if (valid) {
10 |       next();
11 |     } else {
12 |       
13 |       const { details } = error;
14 |       const message = details.map(i => i.message).join(',');
15 |       console.log("error", message);
16 | 
17 |       res.status(422).json({
18 |         error: message 
19 |       })
20 |     }
21 |   }
22 | }
23 | 
24 | module.exports = middleware;


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/app.js:
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 1 | const express = require('express')
 2 | const cors = require('cors');
 3 | const app = express()
 4 | const port = 3000
 5 | 
 6 | const schemas = require('./schemas');
 7 | const middleware = require('./middleware');
 8 | 
 9 | var bodyParser = require("body-parser");
10 | app.use(cors());
11 | app.use(bodyParser.json());
12 | 
13 | app.get('/', (req, res) => res.send('Hello World!'))
14 | 
15 | app.post('/blog', middleware(schemas.blogPOST, 'body') ,function (req, res) {
16 |   console.log('/update');
17 | 
18 |   res.json(req.body);
19 | });
20 | 
21 | app.get('/products', middleware(schemas.blogLIST, 'query'), function (req, res) {
22 |   console.log('/products');
23 | 
24 |   const { page, pageSize } = req.query;
25 |   res.json(req.query);
26 | });
27 | 
28 | app.get('/products/:id', middleware(schemas.blogDETAIL, 'params'), function(req, res) {
29 |   console.log("/products/:id");
30 |   const { id } = req.params;
31 |   res.json(req.params);
32 | })
33 | 
34 | 
35 | app.listen(port, () => console.log(`Example app listening on port ${port}!`))
36 | 
37 | 


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