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# Resolve a service using DNS SRV records.
#
# @api public
class Puppet::HTTP::Resolver::SRV < Puppet::HTTP::Resolver
# Create an DNS SRV resolver.
#
# @param [Puppet::HTTP::Client] client
# @param [String] domain srv domain
# @param [Resolv::DNS] dns
#
def initialize(client, domain:, dns: Resolv::DNS.new)
@client = client
@srv_domain = domain
@delegate = Puppet::HTTP::DNS.new(dns)
end
# Walk the available srv records and return the first that successfully connects
#
# @param [Puppet::HTTP::Session] session
# @param [Symbol] name the service being resolved
# @param [Puppet::SSL::SSLContext] ssl_context
# @param [Proc] canceled_handler optional callback allowing a resolver
# to cancel resolution.
#
# @return [Puppet::HTTP::Service] if an available service is found, return
# it. Return nil otherwise.
#
# @api public
def resolve(session, name, ssl_context: nil, canceled_handler: nil)
# Here we pass our HTTP service name as the DNS SRV service name
# This is fine for :ca, but note that :puppet and :file are handled
# specially in `each_srv_record`.
@delegate.each_srv_record(@srv_domain, name) do |server, port|
service = Puppet::HTTP::Service.create_service(@client, session, name, server, port)
return service if check_connection?(session, service, ssl_context: ssl_context)
end
nil
end
end
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