1초! 난기류로부터 나를 지키는 시간

By: Sexy

On: March 7, 2025

Tagged: Airport, Bank, Bike, Bus, Capital, Card, Expose, HOTEL, Map, Network, Railway, Restaurant, Shopping, Sky, SNS, Station, Subway, Taxi, Transport, Travel, Truck, World

With: 0 Comments

안전한 우리 여행, 1초밖에 안 걸려요!

여행으로 들뜬 마음을 가지고 탄 비행기
갑작스럽게 난기류를 마주한다면?!

당황하지 말고 주변의 빈 좌석에 앉아
안전벨트부터 착용하는 습관이 우리의
비행을 더 안전하게 만들어준답니다.

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Spider

Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web and that is typically operated by search engines for the purpose of Web indexing (web spidering).

Web search engines and some other websites use Web crawling or spidering software to update their web content or indices of other sites' web content. Web crawlers copy pages for processing by a search engine, which indexes the downloaded pages so that users can search more efficiently.

Crawlers consume resources on visited systems and often visit sites unprompted. Issues of schedule, load, and "politeness" come into play when large collections of pages are accessed. Mechanisms exist for public sites not wishing to be crawled to make this known to the crawling agent. For example, including a robots.txt file can request bots to index only parts of a website, or nothing at all.

The number of Internet pages is extremely large; even the largest crawlers fall short of making a complete index. For this reason, search engines struggled to give relevant search results in the early years of the World Wide Web, before 2000. Today, relevant results are given almost instantly.

Crawlers can validate hyperlinks and HTML code. They can also be used for web scraping and data-driven programming.