Class: Puma::ControlCLI

Inherits:
Object
  • Object
show all
Defined in:
lib/puma/control_cli.rb

Constant Summary collapse

COMMANDS =
%w{halt restart phased-restart start stats status stop reload-worker-directory gc gc-stats thread-backtraces}
PRINTABLE_COMMANDS =
%w{gc-stats stats thread-backtraces}

Instance Method Summary collapse

Constructor Details

#initialize(argv, stdout = STDOUT, stderr = STDERR) ⇒ ControlCLI

Returns a new instance of ControlCLI.


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# File 'lib/puma/control_cli.rb', line 17

def initialize(argv, stdout=STDOUT, stderr=STDERR)
  @state = nil
  @quiet = false
  @pidfile = nil
  @pid = nil
  @control_url = nil
  @control_auth_token = nil
  @config_file = nil
  @command = nil
  @environment = ENV['RACK_ENV'] || ENV['RAILS_ENV']

  @argv = argv.dup
  @stdout = stdout
  @stderr = stderr
  @cli_options = {}

  opts = OptionParser.new do |o|
    o.banner = "Usage: pumactl (-p PID | -P pidfile | -S status_file | -C url -T token | -F config.rb) (#{COMMANDS.join("|")})"

    o.on "-S", "--state PATH", "Where the state file to use is" do |arg|
      @state = arg
    end

    o.on "-Q", "--quiet", "Not display messages" do |arg|
      @quiet = true
    end

    o.on "-P", "--pidfile PATH", "Pid file" do |arg|
      @pidfile = arg
    end

    o.on "-p", "--pid PID", "Pid" do |arg|
      @pid = arg.to_i
    end

    o.on "-C", "--control-url URL", "The bind url to use for the control server" do |arg|
      @control_url = arg
    end

    o.on "-T", "--control-token TOKEN", "The token to use as authentication for the control server" do |arg|
      @control_auth_token = arg
    end

    o.on "-F", "--config-file PATH", "Puma config script" do |arg|
      @config_file = arg
    end

    o.on "-e", "--environment ENVIRONMENT",
      "The environment to run the Rack app on (default development)" do |arg|
      @environment = arg
    end

    o.on_tail("-H", "--help", "Show this message") do
      @stdout.puts o
      exit
    end

    o.on_tail("-V", "--version", "Show version") do
      puts Const::PUMA_VERSION
      exit
    end
  end

  opts.order!(argv) { |a| opts.terminate a }
  opts.parse!

  @command = argv.shift

  unless @config_file == '-'
    environment = @environment || 'development'

    if @config_file.nil?
      @config_file = %W(config/puma/#{environment}.rb config/puma.rb).find do |f|
        File.exist?(f)
      end
    end

    if @config_file
      config = Puma::Configuration.new({ config_files: [@config_file] }, {})
      config.load
      @state              ||= config.options[:state]
      @control_url        ||= config.options[:control_url]
      @control_auth_token ||= config.options[:control_auth_token]
      @pidfile            ||= config.options[:pidfile]
    end
  end

  # check present of command
  unless @command
    raise "Available commands: #{COMMANDS.join(", ")}"
  end

  unless COMMANDS.include? @command
    raise "Invalid command: #{@command}"
  end

rescue => e
  @stdout.puts e.message
  exit 1
end

Instance Method Details

#message(msg) ⇒ Object


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# File 'lib/puma/control_cli.rb', line 118

def message(msg)
  @stdout.puts msg unless @quiet
end

#prepare_configurationObject


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# File 'lib/puma/control_cli.rb', line 122

def prepare_configuration
  if @state
    unless File.exist? @state
      raise "State file not found: #{@state}"
    end

    sf = Puma::StateFile.new
    sf.load @state

    @control_url = sf.control_url
    @control_auth_token = sf.control_auth_token
    @pid = sf.pid
  elsif @pidfile
    # get pid from pid_file
    File.open(@pidfile) { |f| @pid = f.read.to_i }
  end
end

#runObject


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# File 'lib/puma/control_cli.rb', line 250

def run
  return start if @command == "start"

  prepare_configuration

  if Puma.windows?
    send_request
  else
    @control_url ? send_request : send_signal
  end

rescue => e
  message e.message
  exit 1
end

#send_requestObject


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# File 'lib/puma/control_cli.rb', line 140

def send_request
  uri = URI.parse @control_url

  # create server object by scheme
  server = case uri.scheme
            when "ssl"
              require 'openssl'
              OpenSSL::SSL::SSLSocket.new(
                TCPSocket.new(uri.host, uri.port),
                OpenSSL::SSL::SSLContext.new
              ).tap(&:connect)
            when "tcp"
              TCPSocket.new uri.host, uri.port
            when "unix"
              UNIXSocket.new "#{uri.host}#{uri.path}"
            else
              raise "Invalid scheme: #{uri.scheme}"
            end

  if @command == "status"
    message "Puma is started"
  else
    url = "/#{@command}"

    if @control_auth_token
      url = url + "?token=#{@control_auth_token}"
    end

    server << "GET #{url} HTTP/1.0\r\n\r\n"

    unless data = server.read
      raise "Server closed connection before responding"
    end

    response = data.split("\r\n")

    if response.empty?
      raise "Server sent empty response"
    end

    (@http,@code,@message) = response.first.split(" ",3)

    if @code == "403"
      raise "Unauthorized access to server (wrong auth token)"
    elsif @code == "404"
      raise "Command error: #{response.last}"
    elsif @code != "200"
      raise "Bad response from server: #{@code}"
    end

    message "Command #{@command} sent success"
    message response.last if PRINTABLE_COMMANDS.include?(@command)
  end
ensure
  server.close if server && !server.closed?
end

#send_signalObject


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# File 'lib/puma/control_cli.rb', line 197

def send_signal
  unless @pid
    raise "Neither pid nor control url available"
  end

  begin

    case @command
    when "restart"
      Process.kill "SIGUSR2", @pid

    when "halt"
      Process.kill "QUIT", @pid

    when "stop"
      Process.kill "SIGTERM", @pid

    when "stats"
      puts "Stats not available via pid only"
      return

    when "reload-worker-directory"
      puts "reload-worker-directory not available via pid only"
      return

    when "phased-restart"
      Process.kill "SIGUSR1", @pid

    when "status"
      begin
        Process.kill 0, @pid
        puts "Puma is started"
      rescue Errno::ESRCH
        raise "Puma is not running"
      end

      return

    else
      return
    end

  rescue SystemCallError
    if @command == "restart"
      start
    else
      raise "No pid '#{@pid}' found"
    end
  end

  message "Command #{@command} sent success"
end