Apptastic Coder

  A web crawler is an internet bot that indexes the content of websites. It can automatically extract target information and data from websites and export data into structured formats (list/table/database). Have you ever wondered how search engines like Google, fetch data from different parts of the web and serve it to you as a user, based on your query? The method used by applications like this is termed crawling. Search engines work and by crawling and indexing billions of web pages using different web crawlers called web spiders or search engine bots. What these web spiders do is follow links from each web page that have been indexed to discover new ages. Is it legal to crawl a website? So is it legal or illegal? Web scraping and crawling aren't illegal by themselves. After all, you could scrape or crawl your own website, without a hitch. Startups love it because it's a cheap and powerful way to gather data without the need for partnerships. Step by step to build a web crawl...

By Nicho Antony Today, there are many applications that depend on APIs to access different resources. Some of the popular APIs include weather, time, and fonts.  There are also servers that host these APIs and ensure that information is delivered to websites and other end points. Therefore, making cross-origin calls, is a popular use case for the modern web application.  Let’s say accessing images, videos, iframes, or scripts from another server. This means that the website is accessing resources from a different origin or domain. When building an application to serve up these resources with Express, a request to such external origins may fail. This is where CORS comes in to handle cross-origin requests.  What is CORS?   CORS stands for Cross-Origin Resource Sharing. It allows us to relax the security applied to an API. This is done by bypassing the Access-Control-Allow-Origin headers, which specify which origins can access the API.  In other words, CORS is a br...