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require "socket"
require "warden/protocol"
require "warden/client/v1"
module Warden
class Client
class Error < StandardError; end
class ServerError < Error; end
attr_reader :path
def initialize(path)
@path = path
@v1mode = false
end
def connected?
!@sock.nil?
end
def connect
raise "already connected" if connected?
@sock = ::UNIXSocket.new(path)
end
def disconnect
raise "not connected" unless connected?
@sock.close rescue nil
@sock = nil
end
def reconnect
disconnect if connected?
connect
end
def io
rv = yield
if rv.nil?
disconnect
raise ::EOFError
end
rv
end
def read
length = io { @sock.gets }
data = io { @sock.read(length.to_i) }
# Discard \r\n
io { @sock.read(2) }
wrapped_response = Warden::Protocol::WrappedResponse.decode(data)
response = wrapped_response.response
# Raise error replies
if response.is_a?(Warden::Protocol::ErrorResponse)
raise Warden::Client::ServerError.new(response.message)
end
if @v1mode
response = V1.response_to_v1(response)
end
response
end
def write(request)
if request.kind_of?(Array)
@v1mode = true
request = V1.request_from_v1(request.dup)
end
unless request.kind_of?(Warden::Protocol::BaseRequest)
raise "Expected #kind_of? Warden::Protocol::BaseRequest"
end
data = request.wrap.encode.to_s
@sock.write data.length.to_s + "\r\n"
@sock.write data + "\r\n"
end
def stream(request, &blk)
unless request.is_a?(Warden::Protocol::StreamRequest)
msg = "Expected argument to be of type:"
msg << "'#{Warden::Protocol::StreamRequest}'"
msg << ", but received: '#{request.class}'."
raise ArgumentError, msg
end
response = call(request)
while response.exit_status.nil?
blk.call(response)
response = read
end
response
end
def call(request)
write(request)
read
end
def method_missing(sym, *args, &blk)
klass_name = sym.to_s.gsub(/(^|_)([a-z])/) { $2.upcase }
klass_name += "Request"
klass = Warden::Protocol.const_get(klass_name)
call(klass.new(*args))
end
end
end
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