Class: NuHttp::Server

Inherits:
Object
  • Object
show all
Includes:
Socket::Constants
Defined in:
lib/nuhttp/server.rb

Defined Under Namespace

Modules: HttpParser

Constant Summary collapse

RFC9110_REASON_PHRASES = 
{
  100 => "Continue",
  101 => "Switching Protocols",
  200 => "OK",
  201 => "Created",
  202 => "Accepted",
  203 => "Non-Authoritative Information",
  204 => "No Content",
  205 => "Reset Content",
  206 => "Partial Content",
  300 => "Multiple Choices",
  301 => "Moved Permanently",
  302 => "Found",
  303 => "See Other",
  304 => "Not Modified",
  305 => "Use Proxy",
  307 => "Temporary Redirect",
  308 => "Permanent Redirect",
  400 => "Bad Request",
  401 => "Unauthorized",
  402 => "Payment Required",
  403 => "Forbidden",
  404 => "Not Found",
  405 => "Method Not Allowed",
  406 => "Not Acceptable",
  407 => "Proxy Authentication Required",
  408 => "Request Timeout",
  409 => "Conflict",
  410 => "Gone",
  411 => "Length Required",
  412 => "Precondition Failed",
  413 => "Content Too Large",
  414 => "URI Too Long",
  415 => "Unsupported Media Type",
  416 => "Range Not Satisfiable",
  417 => "Expectation Failed",
  421 => "Misdirected Request",
  422 => "Unprocessable Content",
  426 => "Upgrade Required",
  500 => "Internal Server Error",
  501 => "Not Implemented",
  502 => "Bad Gateway",
  503 => "Service Unavailable",
  504 => "Gateway Timeout",
  505 => "HTTP Version Not Supported",
}.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, bind: "127.0.0.1", port: 8080, ractor_mode: false, call_make_shareable: false) ⇒ Server

Returns a new instance of Server.



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# File 'lib/nuhttp/server.rb', line 58

def initialize(app, bind: "127.0.0.1", port: 8080, ractor_mode: false, call_make_shareable: false)
  @app = app
  @bind_address = bind
  @port = port
  @ractor_mode = ractor_mode

  # When app_make_shareable: true, app will be deep frozen in attempt to
  # make it Ractor shareable.
  # Note: the app may not be made shareable, even if this option is specified.
  Ractor.make_shareable(@app) if call_make_shareable
  raise "app is not shareable" if @ractor_mode && !Ractor.shareable?(@app)
end

Class Method Details

.handle(app, conn) ⇒ Object 



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# File 'lib/nuhttp/server.rb', line 100

def self.handle(app, conn)
  request = HttpParser.parse_request(conn)

  begin
    res = app.dispatch(request)
  rescue => e
    error_message = [
      "#{e.class}: #{e.message}",
      e.backtrace&.map { |line| "\tfrom #{line}" }&.join("\n")
    ].join("\n")
    puts error_message

    res = Response.new.tap do |r|
      r.status = 500
      r.headers["Content-Type"] = "text/plain"
      r.body = "Internal Server Error\n"
    end
  end

  reason_phrase = RFC9110_REASON_PHRASES[res.status] || "Unknown"

  conn.write "HTTP/1.1 #{res.status} #{reason_phrase}\r\n"

  # Send headers
  res.headers.each do |header_name, header_body|
    conn.write "#{header_name}: #{header_body}\r\n"
  end

  chunked = res.headers["Transfer-Encoding"] == "chunked" # ?

  # Send body
  body = res.body
  if !chunked
    body_str = String.new
    body_str << body

    conn.write "Content-Length: #{body_str.bytesize}\r\n"
    conn.write "Connection: Close\r\n" # no keepalive impl (yet)
    conn.write "\r\n"

    conn.write body_str
  else
    conn.write "\r\n"

    body.each do |chunk|
      conn.write chunk.bytesize.to_s(16) + "\r\n"
      conn.write chunk
      conn.write "\r\n"
    end

    conn.write "0" + "\r\n\r\n"
  end
end

Instance Method Details

#start ⇒ Object 



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# File 'lib/nuhttp/server.rb', line 71

def start
  socket = Socket.new(AF_INET, SOCK_STREAM, 0)
  socket.setsockopt(SOL_SOCKET, SO_REUSEADDR, true)
  sockaddr = Socket.pack_sockaddr_in(@port, @bind_address)
  socket.bind(sockaddr)
  socket.listen(64) # backlog
  puts "Listening on #{@bind_address}:#{@port}"

  loop do
    connn, _ = socket.accept # chose awkward name to avoid shadowing

    if @ractor_mode
      # Make sure @app does not get copied on Ractor.new
      Ractor.new(@app) do |app|
        conn = Ractor.receive
        Server.handle(app, conn)
        nil # reduce implicit copy on #value
      ensure
        conn.close
      end.send(connn, move: true)
    else
      Server.handle(@app, connn)
      connn.close
    end
  end
ensure
  socket.close if defined?(socket)
end