Class: Rack::Handler::Rhebok

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/handler/rhebok.rb

Constant Summary collapse

MAX_MEMORY_BUFFER_SIZE = 
1024 * 1024
DEFAULT_OPTIONS = 
{
  :Host => '0.0.0.0',
  :Port => 9292,
  :Path => nil,
  :MaxWorkers => 5,
  :Timeout => 300,
  :MaxRequestPerChild => 1000,
  :MinRequestPerChild => nil,
  :SpawnInterval => nil,
  :ErrRespawnInterval => nil,
  :OobGC => false,
  :MaxGCPerRequest => 5,
  :MinGCPerRequest => nil,
  :BackLog => Socket::SOMAXCONN,
  :BeforeFork => nil,
  :AfterFork => nil,
  :ReusePort => false,
  :ChunkedTransfer => false,
}
NULLIO = 
StringIO.new("").set_encoding('BINARY')

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Rhebok

Returns a new instance of Rhebok.



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# File 'lib/rack/handler/rhebok.rb', line 61

def initialize(options={})
  if options[:OobGC].instance_of?(String)
    options[:OobGC] = options[:OobGC].match(/^(true|yes|1)$/i) ? true : false
  end
  if options[:ReusePort].instance_of?(String)
    options[:ReusePort] = options[:ReusePort].match(/^(true|yes|1)$/i) ? true : false
  end
  if options[:ChunkedTransfer].instance_of?(String)
    options[:ChunkedTransfer] = options[:ChunkedTransfer].match(/^(true|yes|1)$/i) ? true : false
  end

  @options = DEFAULT_OPTIONS.merge(options)
  if @options[:ConfigFile] != nil
    puts "loading from config_file:#{options[:ConfigFile]}"
    config = ::Rhebok::Config.new
    config.instance_eval(::File.read @options.delete(:ConfigFile))
    @options.merge!(config.retrieve)
  end
  @server = nil
  @_is_tcp = false
  @_using_defer_accept = false
end

Class Method Details

.run(app, options = {}) ⇒ Object 



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# File 'lib/rack/handler/rhebok.rb', line 48

def self.run(app, options={})
  slf = new(options)
  slf.setup_listener()
  slf.run_worker(app)
end

.valid_options ⇒ Object 



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# File 'lib/rack/handler/rhebok.rb', line 54

def self.valid_options
  {
    "Host=HOST" => "Hostname to listen on (default: 0.0.0.0)",
    "Port=PORT" => "Port to listen on (default: 9292)",
  }
end

Instance Method Details

#_calc_gc_per_req ⇒ Object 



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# File 'lib/rack/handler/rhebok.rb', line 195

def _calc_gc_per_req
  if @options[:MinGCPerRequest] == nil
    return @options[:MaxGCPerRequest].to_i
  end
  max = @options[:MaxGCPerRequest].to_i
  min = @options[:MinGCPerRequest].to_i
  if min < max
    max - ((max - min + 1) * rand).to_i
  else
    max
  end
end

#_calc_reqs_per_child ⇒ Object 



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# File 'lib/rack/handler/rhebok.rb', line 182

def _calc_reqs_per_child
  if @options[:MinRequestPerChild] == nil
    return @options[:MaxRequestPerChild].to_i
  end
  max = @options[:MaxRequestPerChild].to_i
  min = @options[:MinRequestPerChild].to_i
  if min < max
    max - ((max - min + 1) * rand).to_i
  else
    max
  end
end

#accept_loop(app) ⇒ Object 



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# File 'lib/rack/handler/rhebok.rb', line 209

def accept_loop(app)
  @term_received = 0
  proc_req_count = 0
  Signal.trap(:TERM) do
    @term_received += 1
  end
  Signal.trap(:PIPE, "IGNORE")
  max_reqs = self._calc_reqs_per_child()
  gc_reqs = self._calc_gc_per_req()
  fileno = @server.fileno

  env_template = {
    "SERVER_NAME"       => @options[:Host],
    "SERVER_PORT"       => @options[:Port].to_s,
    "rack.version"      => [1,1],
    "rack.errors"       => STDERR,
    "rack.multithread"  => false,
    "rack.multiprocess" => true,
    "rack.run_once"     => false,
    "rack.url_scheme"   => "http",
    "rack.input"        => NULLIO
  }

  while @options[:MaxRequestPerChild].to_i == 0 || proc_req_count < max_reqs
    if @term_received > 0
      exit!(true)
    end
    env = env_template.clone
    connection, buf = ::Rhebok.accept_rack(fileno, @options[:Timeout], @_is_tcp, env)
    if connection
      # for tempfile
      buffer = nil
      begin
        proc_req_count += 1
        # handle request
        if env.key?("CONTENT_LENGTH") && env["CONTENT_LENGTH"].to_i > 0
          cl = env["CONTENT_LENGTH"].to_i
          buffer = ::Rhebok::Buffered.new(cl,MAX_MEMORY_BUFFER_SIZE)
          while cl > 0
            chunk = ""
            if buf.bytesize > 0
              chunk = buf
              buf = ""
            else
              readed = ::Rhebok.read_timeout(connection, chunk, cl, 0, @options[:Timeout])
              if readed == nil
                return
              end
            end
            buffer.print(chunk)
            cl -= chunk.bytesize
          end
          env["rack.input"] = buffer.rewind
        elsif env.key?("HTTP_TRANSFER_ENCODING") && env.delete("HTTP_TRANSFER_ENCODING") == 'chunked'
          buffer = ::Rhebok::Buffered.new(0,MAX_MEMORY_BUFFER_SIZE)
          chunked_buffer = '';
          complete = false
          while !complete
            chunk = ""
            if buf.bytesize > 0
              chunk = buf
              buf = ""
            else
              readed = ::Rhebok.read_timeout(connection, chunk, 16384, 0, @options[:Timeout])
              if readed == nil
                return
              end
            end
            chunked_buffer << chunk
            while chunked_buffer.sub!(/^(([0-9a-fA-F]+).*\015\012)/,"") != nil
              trailer = $1
              chunked_len = $2.hex
              if chunked_len == 0
                complete = true
                break
              elsif chunked_buffer.bytesize < chunked_len + 2
                chunked_buffer = trailer + chunked_buffer
                break
              end
              buffer.print(chunked_buffer.byteslice(0,chunked_len))
              chunked_buffer = chunked_buffer.byteslice(chunked_len,chunked_buffer.bytesize-chunked_len)
              chunked_buffer.sub!(/^\015\012/,"")
            end
            break if complete
          end
          env["CONTENT_LENGTH"] = buffer.size.to_s
          env["rack.input"] = buffer.rewind
        end

        status_code, headers, body = app.call(env)

        use_chunked = 0
        if @options[:ChunkedTransfer]
          use_chunked =  env["SERVER_PROTOCOL"] != "HTTP/1.1" ||
                         headers.key?("Transfer-Encoding") ||
                         headers.key?("Content-Length") ? 0 : 1
        end

        if body.instance_of?(Array)
          ::Rhebok.write_response(connection, @options[:Timeout], status_code.to_i, headers, body, use_chunked, 0)
        else
          ::Rhebok.write_response(connection, @options[:Timeout], status_code.to_i, headers, [], use_chunked, 1)
          body.each do |part|
            ret = nil
            if use_chunked == 1
              ret = ::Rhebok.write_chunk(connection, part, 0, @options[:Timeout])
            else
              ret = ::Rhebok.write_all(connection, part, 0, @options[:Timeout])
            end
            if ret == nil
              break
            end
          end #body.each
          ::Rhebok.write_all(connection, "0\015\012\015\012", 0, @options[:Timeout]) if use_chunked == 1
          body.respond_to?(:close) and body.close
        end
        #p [env,status_code,headers,body]
      ensure
        if buffer != nil
          buffer.close
        end
        ::Rhebok.close_rack(connection)
        # out of band gc
        if @options[:OobGC]
          if $RACK_HANDLER_RHEBOK_GCTOOL
            GC::OOB.run
          elsif proc_req_count % gc_reqs == 0
            disabled = GC.enable
            GC.start
            GC.disable if disabled
          end
        end
      end #begin
    end # accept
  end #while max_reqs
end

#run_worker(app) ⇒ Object 



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# File 'lib/rack/handler/rhebok.rb', line 144

def run_worker(app)
  pm_args = {
    "max_workers" => @options[:MaxWorkers].to_i,
    "trap_signals" => {
      "TERM" => 'TERM',
      "HUP"  => 'TERM',
    },
  }
  if @options[:SpawnInterval]
    pm_args["trap_signals"]["USR1"] = ["TERM", @options[:SpawnInterval].to_i]
    pm_args["spawn_interval"] = @options[:SpawnInterval].to_i
  end
  if @options[:ErrRespawnInterval]
    pm_args["err_respawn_interval"] = @options[:ErrRespawnInterval].to_i
  end
  if @options[:BeforeFork]
    pm_args["before_fork"] = proc { |pe2|
      @options[:BeforeFork].call
    }
  end
  Signal.trap('INT','SYSTEM_DEFAULT') # XXX

  pe = PreforkEngine.new(pm_args)
  while !pe.signal_received.match(/^(TERM|USR1)$/)
    pe.start do
      srand
      if @options[:AfterFork]
        @options[:AfterFork].call
      end
      self.accept_loop(app)
    end
  end

  while pe.wait_all_children(1) > 0
    pe.signal_all_children('TERM')
  end
end

#setup_listener ⇒ Object 



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# File 'lib/rack/handler/rhebok.rb', line 84

def setup_listener()
  if ENV.has_key?("SERVER_STARTER_PORT") && ENV["SERVER_STARTER_PORT"].to_s.match(/=/)
    hostport, fd = ENV["SERVER_STARTER_PORT"].split("=",2)
    if m = hostport.match(/(.*):(\d+)/)
      @options[:Host] = m[0]
      @options[:Port] = m[1].to_i
    else
      @options[:Port] = hostport
    end
    @server = Socket.for_fd(fd.to_i)
    @_is_tcp = true if !@server.local_address.unix?
  end

  if @server == nil
    if @options[:Path] != nil
      if ::File.socket?(@options[:Path])
        puts "removing existing socket file:#{@options[:Path]}";
        ::File.unlink(@options[:Path])
      end
      begin
        ::File.unlink(@options[:Path])
      rescue
        #ignore
      end
      puts "Rhebok starts Listening on :unix:#{@options[:Path]} Pid:#{$$}"
      oldmask = ::File.umask(0)
      @server = Socket.new(Socket::AF_UNIX, Socket::SOCK_STREAM, 0)
      @server.bind(Addrinfo.unix(@options[:Path]))
      ::File.umask(oldmask)
      @_is_tcp = false
      @options[:Host] = "0.0.0.0"
      @options[:Port] = 0
    else
      puts "Rhebok starts Listening on #{@options[:Host]}:#{@options[:Port]} Pid:#{$$}"
      addrinfo = Addrinfo.tcp(@options[:Host], @options[:Port])
      @server = Socket.new(defined?(Socket::AF_INET6) && addrinfo.afamily == Socket::AF_INET6 ?
                           Socket::AF_INET6 : Socket::AF_INET, Socket::SOCK_STREAM, 0)
      @server.setsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR, 1)
      if @options[:ReusePort]
        @server.setsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEPORT, 1);
      end
      @server.bind(addrinfo)
      @_is_tcp = true
    end
    @server.listen(@options[:BackLog].to_i)
  end # @server == nil

  if RUBY_PLATFORM.match(/linux/) && @_is_tcp == true
    begin
      @server.setsockopt(Socket::IPPROTO_TCP, 9, 1)
      @_using_defer_accept = true
    end
  end

  if @server.respond_to?("autoclose=")
    @server.autoclose = false
  end

end