Created
August 24, 2011 16:51
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Check if uri exists
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## just some ways to check if a url exists | |
# method 1 - from Simone Carletti | |
require "net/http" | |
url = URI.parse("http://www.google.com/") | |
req = Net::HTTP.new(url.host, url.port) | |
res = req.request_head(url.path) | |
# method 2 - from some kid on the internet | |
require 'open-uri' | |
require 'net/http' | |
def remote_file_exists?(url) | |
url = URI.parse(url) | |
Net::HTTP.start(url.host, url.port) do |http| | |
return http.head(url.request_uri).code == "200" | |
end | |
end | |
# method 3 - from another kid on the internet in response method 2 | |
require 'rubygems' | |
require 'rest-open-uri' | |
def remote_file_exist?(url) | |
open( url , :method => :head).status rescue false | |
end | |
# method 4 - from http://rawsyntax.com/post/4544397323/url-validation-in-rails-3-and-ruby-in-general | |
require 'addressable/uri' | |
class Example | |
include ActiveModel::Validations | |
## | |
# Validates a URL | |
# | |
# If the URI library can parse the value, and the scheme is valid | |
# then we assume the url is valid | |
# | |
class UrlValidator < ActiveModel::EachValidator | |
def validate_each(record, attribute, value) | |
begin | |
uri = Addressable::URI.parse(value) | |
if !["http","https","ftp"].include?(uri.scheme) | |
raise Addressable::URI::InvalidURIError | |
end | |
rescue Addressable::URI::InvalidURIError | |
record.errors[attribute] << "Invalid URL" | |
end | |
end | |
end | |
validates :field, :url => true | |
end |
dsandstrom
commented
May 15, 2018
This work for me:
def working_url?(url_str)
begin
Net::HTTP.get_response(URI.parse(url_str)).is_a?(Net::HTTPSuccess)
rescue
false
end
end
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