862b40b1fb
* added code * removed cdk code * added code examples * added ts files * added code * updated code * error handling code * Update nodejs/errorhandling/js/index.js Co-authored-by: Pratik Das <pratikd2001@gmail.com> Co-authored-by: Tom Hombergs <tom.hombergs@gmail.com>
94 lines
2.3 KiB
JavaScript
94 lines
2.3 KiB
JavaScript
const express = require('express')
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const axios = require("axios")
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// const morgan = require('morgan')
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const app = express()
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const requestLogger = (request, response, next) => {
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console.log(`${request.method} url:: ${request.url}`);
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next()
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}
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app.use(express.static('images'))
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app.use(express.static('htmls'))
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app.use('/products', express.json({ limit: 100 }))
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// Error handling Middleware functions
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const errorLogger = (error, request, response, next) => {
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console.log( `error ${error.message}`)
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next(error) // calling next middleware
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}
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const errorResponder = (error, request, response, next) => {
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response.header("Content-Type", 'application/json')
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const status = error.status || 400
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response.status(status).send(error.message)
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}
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const invalidPathHandler = (request, response, next) => {
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response.status(400)
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response.send('invalid path')
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}
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// handle post request for path /products
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app.post('/products', (request, response) => {
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const products = []
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const name = request.body.name
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const brand = request.body.brand
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const category = request.body.category
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if(name == null){
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res.status(400).json({ message: "Mandatory field name is missing. " })
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}else{
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console.log(name + " " + brand)
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products.push({name: request.body.name, brand: request.body.brand, price: request.body.price})
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const productCreationResponse = {productID: "12345", result: "success"}
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response.json(productCreationResponse)
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}
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})
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app.get('/products', async (request, response, next)=>{
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try{
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const apiResponse = await axios.get("http://localhost:3001/products")
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const jsonResponse = apiResponse.data
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console.log("response "+jsonResponse)
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response.send(jsonResponse)
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}catch(error){
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next(error)
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}
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})
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app.get('/product', (request, response, next)=>{
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axios.get("http://localhost:3001/product")
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.then(response=>response.json)
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.then(jsonresponse=>response.send(jsonresponse))
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.catch(next)
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})
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app.get('/productswitherror', (request, response) => {
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let error = new Error(`processing error in request at ${request.url}`)
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error.statusCode = 400
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throw error
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})
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app.use(errorLogger)
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app.use(errorResponder)
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app.use(invalidPathHandler)
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const port = 3000
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app.listen(3000,
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() => console.log(`Server listening on port ${port}.`));
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