- Web Scraping Using Node Js Pdf
- Web Scraping With Nodejs
- Web Scraping With Node Js And Cheerio
- Web Scraping With Node.js
- To demonstrate how you can scrape a website using Node.js, we're going to set up a script to scrape the Premier League website for some player stats. Specifically, we'll scrape the website for the top 20 goalscorers in Premier League history and organize the data as JSON.
- Getting started with web scraping is easy, and the process can be broken down into two main parts: acquiring the data using an HTML request library or a headless browser, and parsing the data to get the exact information you want. This guide will walk you through the process with the popular Node.js request-promise module, CheerioJS,.
Hi Guys,
Today, I will learn you how to use to retrieve data from any websites or web pages using the node js and cheerio. we will show example of web scraping in node.js. you can easliy use retrieve data from any websites or web pages using the node js and cheerio.
What is web scraping?
Web scraping is a technique used to retrieve data from websites using a script. Web scraping is the way to automate the laborious work of copying data from various websites.
Web Scraping is generally performed in the cases when the desirable websites don’t expose external API for public consumption. Some common web scraping scenarios are:
-Fetch trending posts on social media sites.
-Fetch email addresses from various websites for sales leads.
Scrapingdog is a web scraping API to scrape any website in just a single API call. It handles millions of proxies, browsers and CAPTCHAs so developers and even non-developers can focus on data collection. You can start with free 1000 API calls.
-Fetch news headlines from news websites.
For Example, if you may want to scrape medium.com blog post using the following url https://medium.com/search?q=node.js
After that, open the Inspector in chrome dev tools and see the DOM elements of it.
If you see it carefully, it has a pattern. we can scrap it using the element class names.
Web Scraping with Node js and Cheerio
Follow the here steps and retrieve or scrap blog posts data from the medium.com using node js and cheerio:
Step 1: Setup Node js Project
Web Scraping Using Node Js Pdf
In this step,Let’s set up the project to scrape medium blog posts. Create a Project directory.
Install all the dependencies mentioned above.
Step 2: Making Http Request
Now this step, making the http request to get the webpage elements:
Step 3: Extract Data From Blog Posts
Here this step,Once you retrive all the blog posts from medium.com, you can use cheerio to scrap the data that you need.
This loads the data to the dollar variable. if you have used JQuery before, you know the reason why we are using $ here(Just to follow some old school naming convention).
Now, you can traverse through the DOM tree.
Since you need only the title and link from scrapped blog posts on your web page. you will get the elements in the HTML using either the class name of it or class name of the parent element.
Firstly, we need to get all the blogs DOM which has .js-block as a class name.
Most Importantly, each keyword loops through all the element which has the class name as js-block. Intel r active management technology sol com4.
After, you scrap the title and link of each blog post from medium.com.
This will scrap the blog posts for a given tag.
The full source code of node js web scraping:
app.js
Web Scraping With Nodejs
Step 4: Create Views
Next this step, you need to create one folder name layouts, so go to your nodewebscrap app and find views folder and inside this folder create new folder name layouts.
Web Scraping With Node Js And Cheerio
Inside a layout folder, create one views file name main.handlebars and update the following code into your views/layouts/main.handlebars file:
After that, create one new view file name index.handlebars outside the layouts folder.
nodewebscraper/views/index.handlebars
Update the following code into your index.handlerbars:
After that, create one new view file name list.handlebars outside the layouts folder.
nodewebscraper/views/list.handlebars
Web Scraping With Node.js
Update the following code into your list.handlerbars:
Step 5: Run development server
It will help you..