Class: Jekyll::Commands::Serve::HttpAwareConnection

Inherits:
EventMachine::WebSocket::Connection
  • Object
show all
Defined in:
lib/jekyll/commands/serve/websockets.rb

Overview

The LiveReload protocol requires the server to serve livereload.js over HTTP despite the fact that the protocol itself uses WebSockets. This custom connection class addresses the dual protocols that the server needs to understand.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(_opts) ⇒ HttpAwareConnection

Returns a new instance of HttpAwareConnection.



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# File 'lib/jekyll/commands/serve/websockets.rb', line 14

def initialize(_opts)
  # If EventMachine SSL support on Windows ever gets better, the code below will
  # set up the reactor to handle SSL
  #
  # @ssl_enabled = opts["ssl_cert"] && opts["ssl_key"]
  # if @ssl_enabled
  #   em_opts[:tls_options] = {
  #   :private_key_file => Jekyll.sanitized_path(opts["source"], opts["ssl_key"]),
  #   :cert_chain_file  => Jekyll.sanitized_path(opts["source"], opts["ssl_cert"])
  #   }
  #   em_opts[:secure] = true
  # end

  # This is too noisy even for --verbose, but uncomment if you need it for
  # a specific WebSockets issue.  Adding ?LR-verbose=true onto the URL will
  # enable logging on the client side.
  # em_opts[:debug] = true

  em_opts = {}
  super(em_opts)

  reload_file = File.join(Serve.singleton_class::LIVERELOAD_DIR, "livereload.js")

  @reload_body = File.read(reload_file)
  @reload_size = @reload_body.bytesize
end

Instance Attribute Details

#reload_body ⇒ Object (readonly)

Returns the value of attribute reload_body.



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# File 'lib/jekyll/commands/serve/websockets.rb', line 12

def reload_body
  @reload_body
end

#reload_size ⇒ Object (readonly)

Returns the value of attribute reload_size.



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# File 'lib/jekyll/commands/serve/websockets.rb', line 12

def reload_size
  @reload_size
end

Instance Method Details

#dispatch(data) ⇒ Object

rubocop:disable Metrics/MethodLength



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# File 'lib/jekyll/commands/serve/websockets.rb', line 42

def dispatch(data)
  parser = Http::Parser.new
  parser << data

  # WebSockets requests will have a Connection: Upgrade header
  if parser.http_method != "GET" || parser.upgrade?
    super
  elsif parser.request_url.start_with?("/livereload.js")
    headers = [
      "HTTP/1.1 200 OK",
      "Content-Type: application/javascript",
      "Content-Length: #{reload_size}",
      "",
      "",
    ].join("\r\n")
    send_data(headers)

    # stream_file_data would free us from keeping livereload.js in memory
    # but JRuby blocks on that call and never returns
    send_data(reload_body)
    close_connection_after_writing
  else
    body = "This port only serves livereload.js over HTTP.\n"
    headers = [
      "HTTP/1.1 400 Bad Request",
      "Content-Type: text/plain",
      "Content-Length: #{body.bytesize}",
      "",
      "",
    ].join("\r\n")
    send_data(headers)
    send_data(body)
    close_connection_after_writing
  end
end