Class: Bcat::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/bcat/server.rb

Overview

Simple Rack handler based largely on Scott Chacon’s kidgloves library: github.com/schacon/kidgloves

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ Server

Returns a new instance of Server.



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# File 'lib/bcat/server.rb', line 15

def initialize(app, options={})
  @app = app
  @host = options[:Host] || '0.0.0.0'
  @port = options[:Port] || 8089
end

Instance Attribute Details

#app ⇒ Object

Returns the value of attribute app.



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# File 'lib/bcat/server.rb', line 9

def app
  @app
end

Class Method Details

.run(app, options = {}, &block) ⇒ Object 



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# File 'lib/bcat/server.rb', line 11

def self.run(app, options={}, &block)
  new(app, options).listen(&block)
end

Instance Method Details

#bind(host, port) ⇒ Object 



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# File 'lib/bcat/server.rb', line 21

def bind(host, port)
  TCPServer.new(host, port)
rescue Errno::EADDRINUSE
  port += 1
  retry
end

#listen {|server| ... } ⇒ Object

Yields:

  • (server) 


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# File 'lib/bcat/server.rb', line 28

def listen
  server = TCPServer.new(@host, @port)

  yield server if block_given?

  loop do
    socket = server.accept
    socket.sync = true
    log "#{socket.peeraddr[2]} (#{socket.peeraddr[3]})"
    begin
      req = {}

      # parse the request line
      request = socket.gets
      method, path, version = request.split(" ", 3)
      req["REQUEST_METHOD"] = method
      info, query = path.split("?")
      req["PATH_INFO"] = info
      req["QUERY_STRING"] = query

      # parse the headers
      while (line = socket.gets)
        line.strip!
        break if line.size == 0
        key, val = line.split(": ")
        key = key.upcase.gsub('-', '_')
        key = "HTTP_#{key}" if !%w[CONTENT_TYPE CONTENT_LENGTH].include?(key)
        req[key] = val
      end

      # parse the body
      body =
        if len = req['CONTENT_LENGTH']
          socket.read(len.to_i)
        else
          ''
        end

      # process the request
      process_request(req, body, socket)
    ensure
      socket.close if not socket.closed?
    end
  end
end

#log(message) ⇒ Object 



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# File 'lib/bcat/server.rb', line 74

def log(message)
  # $stderr.puts message
end

#process_request(request, input_body, socket) ⇒ Object 



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# File 'lib/bcat/server.rb', line 82

def process_request(request, input_body, socket)
  env = {}.replace(request)
  env["HTTP_VERSION"] ||= env["SERVER_PROTOCOL"]
  env["QUERY_STRING"] ||= ""
  env["SCRIPT_NAME"] = ""

  rack_input = StringIO.new(input_body)
  rack_input.set_encoding(Encoding::BINARY) if rack_input.respond_to?(:set_encoding)

  env.update(
    "rack.version"      => [1,0],
    "rack.input"        => rack_input,
    "rack.errors"       => $stderr,
    "rack.multithread"  => true,
    "rack.multiprocess" => true,
    "rack.run_once"     => false,
    "rack.url_scheme"   => ["yes", "on", "1"].include?(env["HTTPS"]) ? "https" : "http"
  )
  status, headers, body = app.call(env)
  begin
    socket.write("HTTP/1.1 #{status} #{status_message(status)}\r\n")
    headers.each do |k, vs|
      vs.split("\n").each { |v| socket.write("#{k}: #{v}\r\n")}
    end
    socket.write("\r\n")
    body.each { |s| socket.write(s) }
  ensure
    body.close if body.respond_to? :close
  end
end

#status_message(code) ⇒ Object 



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# File 'lib/bcat/server.rb', line 78

def status_message(code)
  Rack::Utils::HTTP_STATUS_CODES[code]
end