(rails) weird problem with url validation
i'm trying to see if a url exists. here is my code for doing so:
validate :registered_domain_name_exists
private
def registered_domain_name_exists
if url and url.match(URI::regexp(%w(http https))) then开发者_Go百科
begin # check header response
case Net::HTTP.get_response(URI.parse(url))
when Net::HTTPSuccess then true
else errors.add(:url, "URL does not exist") and false
end
rescue # DNS failures
errors.add(:url, "URL does not exist") and false
end
end
end
however, this code is failing. it says http://www.biorad.com is not a valid website. this is absolutely incorrect. Also, knowing that http://www.biorad.com just redirects you to http://www.bio-rad.com/evportal/evolutionPortal.portal i tried this url too, and that also failed. again, i know this can't be possible. what's wrong with my code??
Each of the example urls you gave is a redirect (http status code 301 or 302). Your code is only considering http status code 2xx to be success. Add another case:
when Net::HTTPRedirection then true
UPDATE: Note that using HTTP HEAD instead of GET will transmit less data across the network.
uri = URI.parse(url)
response = Net::HTTP.start(uri.host, uri.port) {|http|
http.head('/')
}
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