Add fake MQTT server from ruby-mqtt gem
Daniel O'Connor
1 fichiers modifiés avec 131 ajouts et 0 suppressions
+ 131
- 0
spec/support/fake_mqtt_server.rb
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+#!/usr/bin/env ruby |
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+# |
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+# This is a 'fake' MQTT server to help with testing client implementations |
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+# |
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+# See https://github.com/njh/ruby-mqtt/blob/master/spec/fake_server.rb |
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+# |
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+# It behaves in the following ways: |
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+# * Responses to CONNECT with a successful CONACK |
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+# * Responses to PUBLISH by echoing the packet back |
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+# * Responses to SUBSCRIBE with SUBACK and a PUBLISH to the topic |
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+# * Responses to PINGREQ with PINGRESP |
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+# * Responses to DISCONNECT by closing the socket |
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+# |
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+# It has the following restrictions |
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+# * Doesn't deal with timeouts |
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+# * Only handles a single connection at a time |
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+# |
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+ |
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+$:.unshift File.dirname(__FILE__)+'/../lib' |
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+ |
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+require 'logger' |
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+require 'socket' |
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+require 'mqtt' |
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+ |
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+ |
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+class MQTT::FakeServer |
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+ attr_reader :address, :port |
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+ attr_reader :last_publish |
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+ attr_reader :thread |
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+ attr_reader :pings_received |
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+ attr_accessor :just_one |
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+ attr_accessor :logger |
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+ |
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+ # Create a new fake MQTT server |
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+ # |
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+ # If no port is given, bind to a random port number |
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+ # If no bind address is given, bind to localhost |
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+ def initialize(port=nil, bind_address='127.0.0.1') |
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+ @port = port |
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+ @address = bind_address |
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+ end |
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+ |
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+ # Get the logger used by the server |
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+ def logger |
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+ @logger ||= Logger.new(STDOUT) |
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+ end |
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+ |
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+ # Start the thread and open the socket that will process client connections |
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+ def start |
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+ @socket ||= TCPServer.new(@address, @port) |
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+ @address = @socket.addr[3] |
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+ @port = @socket.addr[1] |
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+ @thread ||= Thread.new do |
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+ logger.info "Started a fake MQTT server on #{@address}:#{@port}"
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+ loop do |
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+ # Wait for a client to connect |
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+ client = @socket.accept |
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+ @pings_received = 0 |
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+ handle_client(client) |
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+ break if just_one |
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+ end |
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+ end |
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+ end |
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+ |
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+ # Stop the thread and close the socket |
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+ def stop |
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+ logger.info "Stopping fake MQTT server" |
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+ @socket.close unless @socket.nil? |
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+ @socket = nil |
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+ |
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+ @thread.kill if @thread and @thread.alive? |
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+ @thread = nil |
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+ end |
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+ |
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+ # Start the server thread and wait for it to finish (possibly never) |
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+ def run |
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+ start |
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+ begin |
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+ @thread.join |
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+ rescue Interrupt |
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+ stop |
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+ end |
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+ end |
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+ |
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+ |
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+ protected |
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+ |
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+ # Given a client socket, process MQTT packets from the client |
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+ def handle_client(client) |
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+ loop do |
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+ packet = MQTT::Packet.read(client) |
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+ logger.debug packet.inspect |
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+ |
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+ case packet |
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+ when MQTT::Packet::Connect |
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+ client.write MQTT::Packet::Connack.new(:return_code => 0) |
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+ when MQTT::Packet::Publish |
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+ client.write packet |
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+ @last_publish = packet |
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+ when MQTT::Packet::Subscribe |
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+ client.write MQTT::Packet::Suback.new( |
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+ :message_id => packet.message_id, |
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+ :granted_qos => 0 |
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+ ) |
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+ topic = packet.topics[0][0] |
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+ client.write MQTT::Packet::Publish.new( |
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+ :topic => topic, |
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+ :payload => "hello #{topic}",
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+ :retain => true |
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+ ) |
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+ when MQTT::Packet::Pingreq |
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+ client.write MQTT::Packet::Pingresp.new |
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+ @pings_received += 1 |
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+ when MQTT::Packet::Disconnect |
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+ client.close |
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+ break |
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+ end |
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+ end |
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+ |
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+ rescue MQTT::ProtocolException => e |
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+ logger.warn "Protocol error, closing connection: #{e}"
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+ client.close |
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+ end |
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+ |
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+end |
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+ |
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+if __FILE__ == $0 |
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+ server = MQTT::FakeServer.new(MQTT::DEFAULT_PORT) |
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+ server.logger.level = Logger::DEBUG |
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+ server.run |
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+end |