code-boxx/0-NODE-WEB-SCRAPER.MD

## 0-NODE-WEB-SCRAPER.MD

      
    Raw
  

              0-NODE-WEB-SCRAPER.MD
            
          
    NODEJS WEB SCRAPER

https://code-boxx.com/simple-nodejs-web-scraper/
NOTES


Run unpack.bat (Windows) unpack.sh (Linux/Mac). This will automatically:

Save below image as basketball.png.
Install required modules - npm i jsdom
Start the dummy HTTP server - node 1B-server.js


Open your web browser. Access http://localhost/, make sure the server is running.
Open another command terminal, run node 2-scrape.js to scrape the dummy HTML page.

IMAGES


LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1A-dummy.html
<!DOCTYPE html>
<html>
  <head>
    <title>Dummy Product Page</title>
    <style>
    * {
      font-family: Arial, Helvetica, sans-serif;
      box-sizing: border-box;
    }
    #product {
      width: 300px;
      padding: 10px;
      border: 1px solid #eee;
      background: #f5f5f5;
    }
    #pImg {
      display: block;
      width: 100%;
      margin-bottom: 10px;
    }
    #pName {
      font-size: 18px;
      font-weight: 700;
    }
    #pPrice {
      font-weight: 700;
      color: #f34242;
    }
    #pDesc {
      font-size: 14px;
      color: #5c5c5c;
    }
    #pAdd {
      width: 100%;
      margin-top: 10px;
      border: 0;
      padding: 10px;
      color: #fff;
      background: #b72b2b;
      cursor: pointer;
    }
    </style>
  </head>
  <body>
    <div id="product">
      <img src="sandwich.png" id="pImg">
      <div id="pName">Sandwich</div>
      <div id="pPrice">$12.34</div>
      <div id="pDesc">Just a regular SAND wich.</div>
      <input type="button" value="Add To Cart" id="pAdd">
    </div>
  </body>
</html>

## 1B-server.js
// (A) LOAD MODULES
const http = require("http"),
      fs = require("fs");

// (B) HTTP SERVER
http.createServer((req, res) => {
  switch (req.url) {
    // (B1) NOT FOUND
    default:
      res.writeHead(404);
      res.end("NOT FOUND");
      break;

    // (B2) DUMMY PAGE + IMAGE
    case "/":
      res.writeHead(200);
      res.end(fs.readFileSync("1A-dummy.html"));
      break;
    case "/sandwich.png":
      res.writeHead(200);
      res.end(fs.readFileSync("sandwich.png"));
      break;
  }
}).listen(80);
console.log("HTTP SERVER IS RUNNING");

## 2-scrape.js
// (A) LOAD JSDOM
// npm i jsdom
const jsdom = require("jsdom");
const { JSDOM } = jsdom;

// (B) FETCH
fetch("http://localhost/")
.then(res => res.text())
.then(txt => {
	// (B1) PARSE HTML
	const dom = new JSDOM(txt);
	const doc = dom.window.document;

	// (B2) EXTRACT INFORMATION
	// console.log(doc);
	console.log(doc.getElementById("pName").innerHTML);
	console.log(doc.getElementById("pPrice").innerHTML);
	console.log(doc.getElementById("pDesc").innerHTML);
	console.log(doc.getElementById("pImg").src);
})
.catch(err => console.log(err));

## unpack.bat
curl https://user-images.githubusercontent.com/11156244/281624730-68dcbe1f-5aff-42e2-b917-7f890a1b2d1f.png --ssl-no-revoke --output sandwich.png
call npm i jsdom
node 1B-server.js

## unpack.sh
curl https://user-images.githubusercontent.com/11156244/281624730-68dcbe1f-5aff-42e2-b917-7f890a1b2d1f.png --ssl-no-revoke --output ./sandwich.png
source "npm i jsdom"
node ./1B-server.js
	<!DOCTYPE html>
	<html>
	<head>
	<title>Dummy Product Page</title>
	<style>
	* {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	#product {
	width: 300px;
	padding: 10px;
	border: 1px solid #eee;
	background: #f5f5f5;
	}
	#pImg {
	display: block;
	width: 100%;
	margin-bottom: 10px;
	}
	#pName {
	font-size: 18px;
	font-weight: 700;
	}
	#pPrice {
	font-weight: 700;
	color: #f34242;
	}
	#pDesc {
	font-size: 14px;
	color: #5c5c5c;
	}
	#pAdd {
	width: 100%;
	margin-top: 10px;
	border: 0;
	padding: 10px;
	color: #fff;
	background: #b72b2b;
	cursor: pointer;
	}
	</style>
	</head>
	<body>
	<div id="product">
	<img src="sandwich.png" id="pImg">
	<div id="pName">Sandwich</div>
	<div id="pPrice">$12.34</div>
	<div id="pDesc">Just a regular SAND wich.</div>
	<input type="button" value="Add To Cart" id="pAdd">
	</div>
	</body>
	</html>
	// (A) LOAD MODULES
	const http = require("http"),
	fs = require("fs");

	// (B) HTTP SERVER
	http.createServer((req, res) => {
	switch (req.url) {
	// (B1) NOT FOUND
	default:
	res.writeHead(404);
	res.end("NOT FOUND");
	break;

	// (B2) DUMMY PAGE + IMAGE
	case "/":
	res.writeHead(200);
	res.end(fs.readFileSync("1A-dummy.html"));
	break;
	case "/sandwich.png":
	res.writeHead(200);
	res.end(fs.readFileSync("sandwich.png"));
	break;
	}
	}).listen(80);
	console.log("HTTP SERVER IS RUNNING");
	// (A) LOAD JSDOM
	// npm i jsdom
	const jsdom = require("jsdom");
	const { JSDOM } = jsdom;

	// (B) FETCH
	fetch("http://localhost/")
	.then(res => res.text())
	.then(txt => {
	// (B1) PARSE HTML
	const dom = new JSDOM(txt);
	const doc = dom.window.document;

	// (B2) EXTRACT INFORMATION
	// console.log(doc);
	console.log(doc.getElementById("pName").innerHTML);
	console.log(doc.getElementById("pPrice").innerHTML);
	console.log(doc.getElementById("pDesc").innerHTML);
	console.log(doc.getElementById("pImg").src);
	})
	.catch(err => console.log(err));
	curl https://user-images.githubusercontent.com/11156244/281624730-68dcbe1f-5aff-42e2-b917-7f890a1b2d1f.png --ssl-no-revoke --output sandwich.png
	call npm i jsdom
	node 1B-server.js
	curl https://user-images.githubusercontent.com/11156244/281624730-68dcbe1f-5aff-42e2-b917-7f890a1b2d1f.png --ssl-no-revoke --output ./sandwich.png
	source "npm i jsdom"
	node ./1B-server.js