Mla*_*vić 23
require 'net/http'
require 'uri'
Net::HTTP.get_response(URI.parse('http://t.co/yjgxz5Y'))['location']
# => "http://nickstraffictricks.com/4856_how-to-rank-1-in-google/"
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我已经习惯open-uri了,因为它很简单.它将检索页面,但也会遵循多个重定向:
require 'open-uri'
final_uri = ''
open('http://t.co/yjgxz5Y') do |h|
final_uri = h.base_uri
end
final_uri # => #<URI::HTTP:0x00000100851050 URL:http://nickstraffictricks.com/4856_how-to-rank-1-in-google/>
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文档显示了使用较低级Net :: HTTP处理重定向的一个很好的示例.
require 'net/http'
require 'uri'
def fetch(uri_str, limit = 10)
# You should choose better exception.
raise ArgumentError, 'HTTP redirect too deep' if limit == 0
response = Net::HTTP.get_response(URI.parse(uri_str))
case response
when Net::HTTPSuccess then response
when Net::HTTPRedirection then fetch(response['location'], limit - 1)
else
response.error!
end
end
puts fetch('http://www.ruby-lang.org')
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当然,如果页面没有使用HTTP重定向,这一切都会崩溃.许多网站使用元重定向,您必须通过从元标记中检索URL来处理,但这是一个不同的问题.