Class: Tina4::WebServer

Inherits:
Object
  • Object
show all
Defined in:
lib/tina4/webserver.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, host: "0.0.0.0", port: 7145) ⇒ WebServer

Returns a new instance of WebServer.



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# File 'lib/tina4/webserver.rb', line 7

def initialize(app, host: "0.0.0.0", port: 7145)
  @app = app
  @host = host
  @port = port
end

Instance Method Details

#start ⇒ Object 



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# File 'lib/tina4/webserver.rb', line 13

def start
  Tina4.print_banner
  Tina4::Debug.info("Starting Tina4 WEBrick server on http://#{@host}:#{@port}")
  @server = WEBrick::HTTPServer.new(
    BindAddress: @host,
    Port: @port,
    Logger: WEBrick::Log.new(File::NULL),
    AccessLog: []
  )

  # Use a custom servlet that passes ALL methods (including OPTIONS) to Rack
  rack_app = @app
  servlet = Class.new(WEBrick::HTTPServlet::AbstractServlet) do
    define_method(:initialize) do |server, app|
      super(server)
      @app = app
    end

    %w[GET POST PUT DELETE PATCH HEAD OPTIONS].each do |http_method|
      define_method("do_#{http_method}") do |webrick_req, webrick_res|
        handle_request(webrick_req, webrick_res)
      end
    end

    define_method(:handle_request) do |webrick_req, webrick_res|
      env = build_rack_env(webrick_req)
      status, headers, body = @app.call(env)

      webrick_res.status = status
      headers.each do |key, value|
        if key.downcase == "set-cookie"
          Array(value.split("\n")).each { |c| webrick_res.cookies << WEBrick::Cookie.parse_set_cookie(c) }
        else
          webrick_res[key] = value
        end
      end

      response_body = ""
      body.each { |chunk| response_body += chunk }
      webrick_res.body = response_body
    end

    define_method(:build_rack_env) do |req|
      input = StringIO.new(req.body || "")
      env = {
        "REQUEST_METHOD" => req.request_method,
        "PATH_INFO" => req.path,
        "QUERY_STRING" => req.query_string || "",
        "SERVER_NAME" => webrick_req_host,
        "SERVER_PORT" => webrick_req_port,
        "CONTENT_TYPE" => req.content_type || "",
        "CONTENT_LENGTH" => (req.content_length rescue 0).to_s,
        "REMOTE_ADDR" => req.peeraddr&.last || "127.0.0.1",
        "rack.input" => input,
        "rack.errors" => $stderr,
        "rack.url_scheme" => "http",
        "rack.version" => [1, 3],
        "rack.multithread" => true,
        "rack.multiprocess" => false,
        "rack.run_once" => false
      }

      req.header.each do |key, values|
        env_key = "HTTP_#{key.upcase.gsub('-', '_')}"
        env[env_key] = values.join(", ")
      end

      env
    end
  end

  # Store host/port for the servlet's build_rack_env
  host = @host
  port = @port.to_s
  servlet.define_method(:webrick_req_host) { host }
  servlet.define_method(:webrick_req_port) { port }

  @server.mount("/", servlet, rack_app)

  trap("INT") { @server.shutdown }
  trap("TERM") { @server.shutdown }
  @server.start
end

#stop ⇒ Object 



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# File 'lib/tina4/webserver.rb', line 97

def stop
  @server&.shutdown
end