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added ts files

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This commit is contained in:
Pratik Das
2022-02-13 22:32:02 +05:30
parent 6d122d285b
commit de2d608c1d
7 changed files with 97 additions and 61 deletions
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26
node/express/getting-started/app.ts Normal file
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@@ -0,0 +1,26 @@
import express, { Request, Response, NextFunction } from 'express';
const app = express();
const port = 3000;
interface Product {
name: string;
price: number;
brand: string;
};
const getProducts = (request: Request, response: Response, next: NextFunction) => {
let products: Product[] = [
{"name":"television", "price":112.34, "brand":"samsung"},
{"name":"washing machine", "price": 345.34, "brand": "LG"},
{"name":"Macbook", "price": 3454.34, "brand": "Apple"}
]
response.status(200).json(products);
}
app.get('/products', getProducts);
app.listen(port, () => {
console.log(`Server listening at port ${port}.`);
});

15
node/express/getting-started/errormiddleware.js
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@@ -1,17 +1,18 @@
// errormiddleware.js
const errorLogger = (err, req, res, next) => {
const errorLogger = (err, request, response, next) => {
console.log( `error ${err.message}`)
next(err) // calling next middleware
}
const errorResponder = (err, req, res, next) => {
res.header("Content-Type", 'application/json')
const errorResponder = (err, request, response, next) => {
response.header("Content-Type", 'application/json')
res.status(err.statusCode).send(err.message)
const status = err.status || 400
response.status(status).send(err.message)
}
const invalidPathHandler = (req, res, next) => {
res.status(400)
res.send('invalid path')
const invalidPathHandler = (request, response, next) => {
response.status(400)
response.send('invalid path')
}
module.exports = { errorLogger, errorResponder, invalidPathHandler }

52
node/express/getting-started/index.js
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@@ -2,14 +2,14 @@ const express = require('express');
const app = express();
const requestLogger = (req, res, next) => {
console.log(req);
const requestLogger = (request, response, next) => {
console.log(request);
next();
};
const requireJsonContent = (req, res, next) => {
if (req.headers['content-type'] !== 'application/json') {
res.status(400).send('Server requires application/json')
const requireJsonContent = (request, response, next) => {
if (request.headers['content-type'] !== 'application/json') {
response.status(400).send('Server requires application/json')
} else {
next()
}
@@ -17,17 +17,9 @@ const requireJsonContent = (req, res, next) => {
app.use(requestLogger);
const myErrorHandler = (err, req, res, next) => {
if (req.foo) {
res.status(500).send('Fail!');
}else {
next(err);
}
};
app.use(myErrorHandler);
app.use((err, req, res, next) => {
res.status(500).send('Error!')
app.use((err, request, response, next) => {
response.status(500).send('Error!')
})
// Set the body size limit to 100 bytes
@@ -41,18 +33,18 @@ let products = [{"name":"television", "price":112.34, "brand":"samsung"},
// handle get request for path /
app.get('/', (req, res) => {
res.send('response for GET request');
app.get('/', (request, response) => {
response.send('response for GET request');
});
// handle get request for path /products
app.get('/products', (req, res) => {
app.get('/products', (request, response) => {
res.json(products);
response.json(products);
});
// handle get request for path /products
app.get('/products/:brand', (req, res) => {
app.get('/products/:brand', (request, response) => {
const brand = req.params.brand;
@@ -60,11 +52,11 @@ app.get('/products/:brand', (req, res) => {
const productsFiltered = products.filter(product=> product.brand == brand);
res.json(productsFiltered);
response.json(productsFiltered);
});
// handle post request for path /products
app.post('/products', requireJsonContent, (req, res) => {
app.post('/products', requireJsonContent, (request, response) => {
const products = [];
const name = req.body.name ;
@@ -76,31 +68,31 @@ app.post('/products', requireJsonContent, (req, res) => {
products.push({name: req.body.name, brand: req.body.brand, price: req.body.price});
const productCreationResponse = {productID: "12345", result: "success"};
res.json(productCreationResponse);
response.json(productCreationResponse);
});
app.set('view engine', 'pug')
app.set('views', './views')
app.get('/home', (req, res) => {
res.render("home", { title: "Home", message: "My home page" , sysdate: new Date().toLocaleString()})
app.get('/home', (request, response) => {
response.render("home", { title: "Home", message: "My home page" , sysdate: new Date().toLocaleString()})
})
// handle get request with 3 middleware functions
app.get('/users', (req, res, next) => {
app.get('/users', (request, response, next) => {
console.log("Stage 1 processing ");
next()
},
(req, res, next) => {
(request, response, next) => {
console.log("Stage 2 processing ");
next();
},
(req, res) => {
res.send('response for GET request');
(request, response) => {
response.send('response for GET request');
});
app.get('/products/error', (req, res) => {
app.get('/products/error', (request, response) => {
throw new Error("processing error!")
});
// start the server

10
node/express/getting-started/middleware.js
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@@ -1,13 +1,13 @@
// middleware.js
const requestLogger = (req, res, next) => {
console.log(req);
const requestLogger = (request, response, next) => {
console.log(request);
next();
};
const requireJsonContent = (req, res, next) => {
if (req.headers['content-type'] !== 'application/json') {
res.status(400).send('Server requires application/json')
const requireJsonContent = (request, response, next) => {
if (request.headers['content-type'] !== 'application/json') {
response.status(400).send('Server requires application/json')
} else {
next()
}

10
node/express/getting-started/package.json
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@@ -4,7 +4,8 @@
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
"test": "echo \"Error: no test specified\" && exit 1",
"serve": "nodemon app.ts"
},
"keywords": [],
"author": "",
@@ -12,5 +13,12 @@
"dependencies": {
"express": "^4.17.2",
"pug": "^3.0.2"
},
"devDependencies": {
"@types/express": "^4.17.13",
"@types/node": "^17.0.17",
"nodemon": "^2.0.15",
"ts-node": "^10.5.0",
"typescript": "^4.5.5"
}
}

37
node/express/getting-started/routes.js
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@@ -12,59 +12,60 @@ let products = [{"name":"television", "price":112.34, "brand":"samsung"},
{"name":"Macbook", "price": 3454.34, "brand": "Apple"}];
// handle get request for path /products
router.get('/products', (req, res) => {
res.json(products);
router.get('/products', (request, response) => {
console.log(products)
response.json(products)
});
// handle get request for path /products
router.get('/products/:brand', (req, res) => {
router.get('/products/:brand', (request, response) => {
const brand = req.params.brand;
const brand = request.params.brand;
console.log(`brand ${brand} `);
const productsFiltered = products.filter(product=> product.brand == brand);
res.json(productsFiltered);
response.json(productsFiltered);
});
// handle post request for path /products
router.post('/products', requireJsonContent,(req, res) => {
router.post('/products', requireJsonContent,(request, response) => {
const name = req.body.name ;
const name = request.body.name ;
const brand = req.body.brand;
const brand = request.body.brand;
console.log(name + " " + brand);
products.push({name: req.body.name, brand: req.body.brand, price: req.body.price});
products.push({name: request.body.name, brand: request.body.brand, price: request.body.price});
const productCreationResponse = {productID: "12345", result: "success"};
res.json(productCreationResponse);
response.json(productCreationResponse);
});
// handle put request for path /products
router.put('/products', (req, res) => {
router.put('/products', (request, response) => {
const name = req.body.name ;
const name = request.body.name ;
const brand = req.body.brand;
const brand = request.body.brand;
console.log(name + " " + brand);
products.push({name: req.body.name, brand: req.body.brand, price: req.body.price});
products.push({name: request.body.name, brand: request.body.brand, price: request.body.price});
const productCreationResponse = {productID: "12345", result: "success"};
res.json(productCreationResponse);
response.json(productCreationResponse);
})
router.get('/home', (req, res) => {
router.get('/home', (request, response) => {
console.log("rendering...")
res.render("home", { title: "Home", message: "My home page" , sysdate: new Date().toLocaleString()})
response.render("home", { title: "Home", message: "My home page" , sysdate: new Date().toLocaleString()})
})
router.get('/productswitherror', (req, res) => {
router.get('/productswitherror', (request, response) => {
let err = new Error("processing error ")
err.statusCode = 400
throw err

8
node/express/getting-started/tsconfig.json Normal file
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@@ -0,0 +1,8 @@
{
"compilerOptions": {
"module": "commonjs",
"target": "es6",
"rootDir": "./",
"esModuleInterop": true
}
}