November 2012
Intermediate to advanced
888 pages
54h 46m
Polish
Content preview from Ruby. Receptury
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14.1. Pobieranie zawartości strony WWW
Problem
Chcemy wyświetlić bądź przetworzyć określoną stronę WWW.
Rozwiązanie
Najprostszym rozwiązaniem jest skorzystanie z biblioteki open-uri. Biblioteka ta umożliwia otwarcie strony WWW tak, jakby była ona plikiem. Poniższy kod pobiera stronę www.oreilly.com i wyświetla jej początkowy fragment:
require 'open-uri'
puts open('http://www.oreilly.com/').read(200)
# <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
# "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
# <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
W przypadku bardziej złożonych aplikacji trzeba skorzystać z biblioteki net/http. Aby wykonać żądanie HTTP i uzyskać odpowiedź w postaci obiektu ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.