Class: Puma::Binder

Inherits:
Object
  • Object
show all
Includes:
Const
Defined in:
lib/puma/binder.rb

Constant Summary collapse

RACK_VERSION = 
[1,6].freeze

Constants included from Const

Const::BANNED_HEADER_KEY, Const::CGI_VER, Const::CHUNKED, Const::CHUNK_SIZE, Const::CLOSE, Const::CLOSE_CHUNKED, Const::CODE_NAME, Const::COLON, Const::CONNECTION_CLOSE, Const::CONNECTION_KEEP_ALIVE, Const::CONTENT_LENGTH, Const::CONTENT_LENGTH2, Const::CONTENT_LENGTH_S, Const::CONTINUE, Const::DQUOTE, Const::EARLY_HINTS, Const::ERROR_RESPONSE, Const::FAST_TRACK_KA_TIMEOUT, Const::FIRST_DATA_TIMEOUT, Const::GATEWAY_INTERFACE, Const::HALT_COMMAND, Const::HEAD, Const::HIJACK, Const::HIJACK_IO, Const::HIJACK_P, Const::HTTP, Const::HTTPS, Const::HTTPS_KEY, Const::HTTP_10_200, Const::HTTP_11, Const::HTTP_11_100, Const::HTTP_11_200, Const::HTTP_CONNECTION, Const::HTTP_EXPECT, Const::HTTP_HEADER_DELIMITER, Const::HTTP_HOST, Const::HTTP_VERSION, Const::HTTP_X_FORWARDED_FOR, Const::HTTP_X_FORWARDED_PROTO, Const::HTTP_X_FORWARDED_SCHEME, Const::HTTP_X_FORWARDED_SSL, Const::ILLEGAL_HEADER_KEY_REGEX, Const::ILLEGAL_HEADER_VALUE_REGEX, Const::KEEP_ALIVE, Const::LINE_END, Const::LOCALHOST, Const::LOCALHOST_IP, Const::MAX_BODY, Const::MAX_FAST_INLINE, Const::MAX_HEADER, Const::NEWLINE, Const::PATH_INFO, Const::PERSISTENT_TIMEOUT, Const::PORT_443, Const::PORT_80, Const::PUMA_CONFIG, Const::PUMA_PEERCERT, Const::PUMA_SERVER_STRING, Const::PUMA_SOCKET, Const::PUMA_TMP_BASE, Const::PUMA_VERSION, Const::QUERY_STRING, Const::RACK_AFTER_REPLY, Const::RACK_INPUT, Const::RACK_URL_SCHEME, Const::REMOTE_ADDR, Const::REQUEST_METHOD, Const::REQUEST_PATH, Const::REQUEST_URI, Const::RESTART_COMMAND, Const::SERVER_NAME, Const::SERVER_PORT, Const::SERVER_PROTOCOL, Const::SERVER_SOFTWARE, Const::STOP_COMMAND, Const::TRANSFER_ENCODING, Const::TRANSFER_ENCODING2, Const::TRANSFER_ENCODING_CHUNKED, Const::WORKER_CHECK_INTERVAL, Const::WRITE_TIMEOUT

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(events, conf = Configuration.new) ⇒ Binder

Returns a new instance of Binder.



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# File 'lib/puma/binder.rb', line 31

def initialize(events, conf = Configuration.new)
  @events = events
  @listeners = []
  @inherited_fds = {}
  @activated_sockets = {}
  @unix_paths = []

  @proto_env = {
    "rack.version".freeze => RACK_VERSION,
    "rack.errors".freeze => events.stderr,
    "rack.multithread".freeze => conf.options[:max_threads] > 1,
    "rack.multiprocess".freeze => conf.options[:workers] >= 1,
    "rack.run_once".freeze => false,
    RACK_URL_SCHEME => conf.options[:rack_url_scheme],
    "SCRIPT_NAME".freeze => ENV['SCRIPT_NAME'] || "",

    # I'd like to set a default CONTENT_TYPE here but some things
    # depend on their not being a default set and inferring
    # it from the content. And so if i set it here, it won't
    # infer properly.

    "QUERY_STRING".freeze => "",
    SERVER_PROTOCOL => HTTP_11,
    SERVER_SOFTWARE => PUMA_SERVER_STRING,
    GATEWAY_INTERFACE => CGI_VER
  }

  @envs = {}
  @ios = []
end

Instance Attribute Details

#activated_sockets ⇒ Object (readonly)

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 65

def activated_sockets
  @activated_sockets
end

#connected_ports ⇒ Object (readonly)

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 80

def connected_ports
  ios.map { |io| io.addr[1] }.uniq
end

#envs ⇒ Object (readonly)

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 65

def envs
  @envs
end

#inherited_fds ⇒ Object (readonly)

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 65

def inherited_fds
  @inherited_fds
end

#ios ⇒ Object

Returns the value of attribute ios.



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# File 'lib/puma/binder.rb', line 62

def ios
  @ios
end

#listeners ⇒ Object

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 65

def listeners
  @listeners
end

#proto_env ⇒ Object (readonly)

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 65

def proto_env
  @proto_env
end

#unix_paths ⇒ Object (readonly)

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 65

def unix_paths
  @unix_paths
end

Instance Method Details

#add_ssl_listener(host, port, ctx, optimize_for_latency = true, backlog = 1024) ⇒ Object 



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# File 'lib/puma/binder.rb', line 322

def add_ssl_listener(host, port, ctx,
                     optimize_for_latency=true, backlog=1024)

  raise "Puma compiled without SSL support" unless HAS_SSL

  if host == "localhost"
    loopback_addresses.each do |addr|
      add_ssl_listener addr, port, ctx, optimize_for_latency, backlog
    end
    return
  end

  host = host[1..-2] if host[0..0] == '['
  s = TCPServer.new(host, port)
  if optimize_for_latency
    s.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
  end
  s.setsockopt(Socket::SOL_SOCKET,Socket::SO_REUSEADDR, true)
  s.listen backlog

  ssl = MiniSSL::Server.new s, ctx
  env = @proto_env.dup
  env[HTTPS_KEY] = HTTPS
  @envs[ssl] = env

  @ios << ssl
  s
end

#add_tcp_listener(host, port, optimize_for_latency = true, backlog = 1024) ⇒ Object

Tell the server to listen on host host, port port. If optimize_for_latency is true (the default) then clients connecting will be optimized for latency over throughput.

backlog indicates how many unaccepted connections the kernel should allow to accumulate before returning connection refused.



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# File 'lib/puma/binder.rb', line 295

def add_tcp_listener(host, port, optimize_for_latency=true, backlog=1024)
  if host == "localhost"
    loopback_addresses.each do |addr|
      add_tcp_listener addr, port, optimize_for_latency, backlog
    end
    return
  end

  host = host[1..-2] if host and host[0..0] == '['
  tcp_server = TCPServer.new(host, port)
  if optimize_for_latency
    tcp_server.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
  end
  tcp_server.setsockopt(Socket::SOL_SOCKET,Socket::SO_REUSEADDR, true)
  tcp_server.listen backlog

  @ios << tcp_server
  tcp_server
end

#add_unix_listener(path, umask = nil, mode = nil, backlog = 1024) ⇒ Object

Tell the server to listen on path as a UNIX domain socket.



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# File 'lib/puma/binder.rb', line 369

def add_unix_listener(path, umask=nil, mode=nil, backlog=1024)
  # Let anyone connect by default
  umask ||= 0

  begin
    old_mask = File.umask(umask)

    if File.exist? path
      begin
        old = UNIXSocket.new path
      rescue SystemCallError, IOError
        File.unlink path
      else
        old.close
        raise "There is already a server bound to: #{path}"
      end
    end
    s = UNIXServer.new path.sub(/\A@/, "\0") # check for abstract UNIXSocket
    s.listen backlog
    @ios << s
  ensure
    File.umask old_mask
  end

  if mode
    File.chmod mode, path
  end

  env = @proto_env.dup
  env[REMOTE_ADDR] = "127.0.0.1"
  @envs[s] = env

  s
end

#close ⇒ Object 



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# File 'lib/puma/binder.rb', line 74

def close
  @ios.each { |i| i.close }
end

#close_listeners ⇒ Object 



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# File 'lib/puma/binder.rb', line 416

def close_listeners
  @listeners.each do |l, io|
    io.close unless io.closed?
    uri = URI.parse l
    next unless uri.scheme == 'unix'
    unix_path = "#{uri.host}#{uri.path}"
    File.unlink unix_path if @unix_paths.include?(unix_path) && File.exist?(unix_path)
  end
end

#create_activated_fds(env_hash) ⇒ Object

systemd socket activation. LISTEN_FDS = number of listening sockets. e.g. 2 means accept on 2 sockets w/descriptors 3 and 4. LISTEN_PID = PID of the service process, aka us

See Also:

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 98

def create_activated_fds(env_hash)
  @events.debug "ENV['LISTEN_FDS'] #{ENV['LISTEN_FDS'].inspect}  env_hash['LISTEN_PID'] #{env_hash['LISTEN_PID'].inspect}"
  return [] unless env_hash['LISTEN_FDS'] && env_hash['LISTEN_PID'].to_i == $$
  env_hash['LISTEN_FDS'].to_i.times do |index|
    sock = TCPServer.for_fd(socket_activation_fd(index))
    key = begin # Try to parse as a path
      [:unix, Socket.unpack_sockaddr_un(sock.getsockname)]
    rescue ArgumentError # Try to parse as a port/ip
      port, addr = Socket.unpack_sockaddr_in(sock.getsockname)
      addr = "[#{addr}]" if addr =~ /\:/
      [:tcp, addr, port]
    end
    @activated_sockets[key] = sock
    @events.debug "Registered #{key.join ':'} for activation from LISTEN_FDS"
  end
  ["LISTEN_FDS", "LISTEN_PID"] # Signal to remove these keys from ENV
end

#create_inherited_fds(env_hash) ⇒ Object

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 85

def create_inherited_fds(env_hash)
  env_hash.select {|k,v| k =~ /PUMA_INHERIT_\d+/}.each do |_k, v|
    fd, url = v.split(":", 2)
    @inherited_fds[url] = fd.to_i
  end.keys # pass keys back for removal
end

#env(sock) ⇒ Object 



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# File 'lib/puma/binder.rb', line 70

def env(sock)
  @envs.fetch(sock, @proto_env)
end

#inherit_ssl_listener(fd, ctx) ⇒ Object 



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# File 'lib/puma/binder.rb', line 351

def inherit_ssl_listener(fd, ctx)
  raise "Puma compiled without SSL support" unless HAS_SSL

  s = fd.kind_of?(::TCPServer) ? fd : ::TCPServer.for_fd(fd)

  ssl = MiniSSL::Server.new(s, ctx)

  env = @proto_env.dup
  env[HTTPS_KEY] = HTTPS
  @envs[ssl] = env

  @ios << ssl

  s
end

#inherit_tcp_listener(host, port, fd) ⇒ Object 



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# File 'lib/puma/binder.rb', line 315

def inherit_tcp_listener(host, port, fd)
  s = fd.kind_of?(::TCPServer) ? fd : ::TCPServer.for_fd(fd)

  @ios << s
  s
end

#inherit_unix_listener(path, fd) ⇒ Object 



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# File 'lib/puma/binder.rb', line 404

def inherit_unix_listener(path, fd)
  s = fd.kind_of?(::TCPServer) ? fd : ::UNIXServer.for_fd(fd)

  @ios << s

  env = @proto_env.dup
  env[REMOTE_ADDR] = "127.0.0.1"
  @envs[s] = env

  s
end

#parse(binds, logger, log_msg = 'Listening') ⇒ Object 



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# File 'lib/puma/binder.rb', line 153

def parse(binds, logger, log_msg = 'Listening')
  binds.each do |str|
    uri = URI.parse str
    case uri.scheme
    when "tcp"
      if fd = @inherited_fds.delete(str)
        io = inherit_tcp_listener uri.host, uri.port, fd
        logger.log "* Inherited #{str}"
      elsif sock = @activated_sockets.delete([ :tcp, uri.host, uri.port ])
        io = inherit_tcp_listener uri.host, uri.port, sock
        logger.log "* Activated #{str}"
      else
        ios_len = @ios.length
        params = Util.parse_query uri.query

        opt = params.key?('low_latency') && params['low_latency'] != 'false'
        bak = params.fetch('backlog', 1024).to_i

        io = add_tcp_listener uri.host, uri.port, opt, bak

        @ios[ios_len..-1].each do |i|
          addr = loc_addr_str i
          logger.log "* #{log_msg} on http://#{addr}"
        end
      end

      @listeners << [str, io] if io
    when "unix"
      path = "#{uri.host}#{uri.path}".gsub("%20", " ")
      abstract = false
      if str.start_with? 'unix://@'
        raise "OS does not support abstract UNIXSockets" unless Puma.abstract_unix_socket?
        abstract = true
        path = "@#{path}"
      end

      if fd = @inherited_fds.delete(str)
        @unix_paths << path unless abstract
        io = inherit_unix_listener path, fd
        logger.log "* Inherited #{str}"
      elsif sock = @activated_sockets.delete([ :unix, path ]) ||
          @activated_sockets.delete([ :unix, File.realdirpath(path) ])
        @unix_paths << path unless abstract || File.exist?(path)
        io = inherit_unix_listener path, sock
        logger.log "* Activated #{str}"
      else
        umask = nil
        mode = nil
        backlog = 1024

        if uri.query
          params = Util.parse_query uri.query
          if u = params['umask']
            # Use Integer() to respect the 0 prefix as octal
            umask = Integer(u)
          end

          if u = params['mode']
            mode = Integer('0'+u)
          end

          if u = params['backlog']
            backlog = Integer(u)
          end
        end

        @unix_paths << path unless abstract || File.exist?(path)
        io = add_unix_listener path, umask, mode, backlog
        logger.log "* #{log_msg} on #{str}"
      end

      @listeners << [str, io]
    when "ssl"

      raise "Puma compiled without SSL support" unless HAS_SSL

      params = Util.parse_query uri.query
      ctx = MiniSSL::ContextBuilder.new(params, @events).context

      if fd = @inherited_fds.delete(str)
        logger.log "* Inherited #{str}"
        io = inherit_ssl_listener fd, ctx
      elsif sock = @activated_sockets.delete([ :tcp, uri.host, uri.port ])
        io = inherit_ssl_listener sock, ctx
        logger.log "* Activated #{str}"
      else
        ios_len = @ios.length
        io = add_ssl_listener uri.host, uri.port, ctx

        @ios[ios_len..-1].each do |i|
          addr = loc_addr_str i
          logger.log "* #{log_msg} on ssl://#{addr}?#{uri.query}"
        end
      end

      @listeners << [str, io] if io
    else
      logger.error "Invalid URI: #{str}"
    end
  end

  # If we inherited fds but didn't use them (because of a
  # configuration change), then be sure to close them.
  @inherited_fds.each do |str, fd|
    logger.log "* Closing unused inherited connection: #{str}"

    begin
      IO.for_fd(fd).close
    rescue SystemCallError
    end

    # We have to unlink a unix socket path that's not being used
    uri = URI.parse str
    if uri.scheme == "unix"
      path = "#{uri.host}#{uri.path}"
      File.unlink path
    end
  end

  # Also close any unused activated sockets
  unless @activated_sockets.empty?
    fds = @ios.map(&:to_i)
    @activated_sockets.each do |key, sock|
      next if fds.include? sock.to_i
      logger.log "* Closing unused activated socket: #{key.first}://#{key[1..-1].join ':'}"
      begin
        sock.close
      rescue SystemCallError
      end
      # We have to unlink a unix socket path that's not being used
      File.unlink key[1] if key.first == :unix
    end
  end
end

#redirects_for_restart ⇒ Object 



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# File 'lib/puma/binder.rb', line 426

def redirects_for_restart
  redirects = @listeners.map { |a| [a[1].to_i, a[1].to_i] }.to_h
  redirects[:close_others] = true
  redirects
end

#redirects_for_restart_env ⇒ Object

Version:

  • 5.0.0



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# File 'lib/puma/binder.rb', line 433

def redirects_for_restart_env
  @listeners.each_with_object({}).with_index do |(listen, memo), i|
    memo["PUMA_INHERIT_#{i}"] = "#{listen[1].to_i}:#{listen[0]}"
  end
end

#synthesize_binds_from_activated_fs(binds, only_matching) ⇒ Object

Synthesize binds from systemd socket activation

When systemd socket activation is enabled, it can be tedious to keep the binds in sync. This method can synthesize any binds based on the received activated sockets. Any existing matching binds will be respected.

When only_matching is true in, all binds that do not match an activated socket is removed in place.

It’s a noop if no activated sockets were received.



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# File 'lib/puma/binder.rb', line 126

def synthesize_binds_from_activated_fs(binds, only_matching)
  return binds unless activated_sockets.any?

  activated_binds = []

  activated_sockets.keys.each do |proto, addr, port|
    if port
      tcp_url = "#{proto}://#{addr}:#{port}"
      ssl_url = "ssl://#{addr}:#{port}"
      ssl_url_prefix = "#{ssl_url}?"

      existing = binds.find { |bind| bind == tcp_url || bind == ssl_url || bind.start_with?(ssl_url_prefix) }

      activated_binds << (existing || tcp_url)
    else
      # TODO: can there be a SSL bind without a port?
      activated_binds << "#{proto}://#{addr}"
    end
  end

  if only_matching
    activated_binds
  else
    binds | activated_binds
  end
end