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kjlape/ephemeral_port.rb

Last active August 30, 2016 15:19
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Ruby hack to get an ephemeral localhost port from the system.
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ephemeral_port.rb
def ephemeral_port
unless @ephemeral_port
tcp_server = TCPServer.new('localhost', 0)
@ephemeral_port ||= tcp_server.addr[1]
tcp_server.close
end
@ephemeral_port
end
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