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require 'open-uri'
require 'net-purge'
if RUBY_VERSION.to_f < 2.0
require 'net/http/local'
end
def quietly_try_to_open(url)
begin
result = open(url).read.strip
rescue OpenURI::HTTPError,
SocketError,
Errno::ETIMEDOUT,
Errno::ECONNREFUSED,
Errno::EHOSTUNREACH,
Errno::ECONNRESET,
Timeout::Error => exception
e = Exception.new("Unable to open third-party URL #{url}: #{exception.message}")
e.set_backtrace(exception.backtrace)
if !AlaveteliConfiguration.exception_notifications_from.blank? && !AlaveteliConfiguration.exception_notifications_to.blank?
ExceptionNotifier::Notifier.exception_notification(request.env, e).deliver
end
Rails.logger.warn(e.message)
result = ""
end
return result
end
# On Ruby versions before 2.0, we need to use the net-http-local gem
# to force the use of 127.0.0.1 as the local interface for the
# connection. However, at the time of writing this gem doesn't work
# on Ruby 2.0 and it's not necessary with that Ruby version - one can
# supply a :local_host option to Net::HTTP:start. So, this helper
# function is to abstract away that difference, and can be used as you
# would Net::HTTP.start(host) when passed a block.
def http_from_localhost(host)
if RUBY_VERSION.to_f >= 2.0
Net::HTTP.start(host, :local_host => '127.0.0.1') do |http|
yield http
end
else
Net::HTTP.bind '127.0.0.1' do
Net::HTTP.start(host) do |http|
yield http
end
end
end
end
def quietly_try_to_purge(host, url)
begin
result = ""
result_body = ""
http_from_localhost(host) do |http|
request = Net::HTTP::Purge.new(url)
response = http.request(request)
result = response.code
result_body = response.body
end
rescue OpenURI::HTTPError, SocketError, Errno::ETIMEDOUT, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ECONNRESET, Errno::ENETUNREACH
Rails.logger.warn("PURGE: Unable to reach host #{host}")
end
if result == "200"
Rails.logger.debug("PURGE: Purged URL #{url} at #{host}: #{result}")
else
Rails.logger.warn("PURGE: Unable to purge URL #{url} at #{host}: status #{result}")
end
return result
end
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