spider/crawler

[jaydee]

How spider/crawler work?

[prtfinance]

A Web crawler is a computer program that browses the World Wide Web in a methodical, automated manner.

This process is called Web crawling or spidering. Many sites, in particular search engines, use spidering as a means of providing up-to-date data. Web crawlers are mainly used to create a copy of all the visited pages for later processing by a search engine that will index the downloaded pages to provide fast searches.

[ForumMaster]

A crawler needs a starting point, which would be a web address, a URL. In order to browse the internet, we use the HTTP network protocol, which allows us to talk to web servers and download or upload data from and to it.

[keith12]

Many sites, in particular search engines, use spidering as a means of providing up-to-date data. Web crawlers are mainly used to create a copy of all the visited pages for later processing by a search engine