Module: WebSocket::HttpStaticFileServerHandlerInstanceMethods

Included in:
HttpStaticFileServerHandler
Defined in:
lib/websocket/http_static_file_server_handler_instance_methods.rb

Overview

The HttpStaticFileServerHandlerInstanceMethods module

Constant Summary collapse

FORWARD_SLASH_BEFORE_EOL_PATTERN = 
%r{/$}
URI_FORWARD_SLASH_TEMPLATE = 
'%<uri>s/'.freeze

Instance Method Summary collapse

Instance Method Details

#exceptionCaught(ctx, cause) ⇒ Object

rubocop: enable Metrics/AbcSize rubocop: enable Metrics/CyclomaticComplexity rubocop: enable Metrics/MethodLength rubocop: enable Metrics/PerceivedComplexity



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# File 'lib/websocket/http_static_file_server_handler_instance_methods.rb', line 151

def exceptionCaught(ctx, cause)
  cause.printStackTrace()
  return unless ctx.channel().isActive()
  send_error(ctx, HttpResponseStatus::INTERNAL_SERVER_ERROR)
end

#messageReceived(ctx, request) ⇒ Object

rubocop: disable Metrics/AbcSize rubocop: disable Metrics/CyclomaticComplexity rubocop: disable Metrics/MethodLength rubocop: disable Metrics/PerceivedComplexity



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# File 'lib/websocket/http_static_file_server_handler_instance_methods.rb', line 46

def messageReceived(ctx, request)
  return if %r{^#{options[:web_socket_path]}$}.match?(request.uri)

  unless request.decoderResult().isSuccess()
    send_error(ctx, HttpResponseStatus::BAD_REQUEST)
    return
  end

  unless request.method() == HttpMethod::GET
    send_error(ctx, HttpResponseStatus::METHOD_NOT_ALLOWED)
    return
  end

  uri = request.uri
  path = sanitize_uri(uri)
  if path.nil?
    send_error(ctx, HttpResponseStatus::FORBIDDEN)
    return
  end

  unless File.exist? path
    send_error(ctx, HttpResponseStatus::NOT_FOUND)
    return
  end

  if File.directory? path
    if FORWARD_SLASH_BEFORE_EOL_PATTERN.match?(uri)
      send_listing(ctx, path)
    else
      send_redirect(ctx, format(URI_FORWARD_SLASH_TEMPLATE, uri: uri))
    end
    return
  end

  unless File.exist? path
    send_error(ctx, HttpResponseStatus::FORBIDDEN)
    return
  end

  # Cache Validation
  modified_since = request.headers().get(HttpHeaderNames::IF_MODIFIED_SINCE)
  if !modified_since.nil? && !modified_since.empty?
    file_last_modified = File.mtime(path).to_s
    # Only compare up to the second because the format of the timestamp
    # sent to the client does not include milliseconds
    modified_since_seconds = DateTime.parse(modified_since).to_time.to_i
    file_last_modified_seconds = DateTime.parse(file_last_modified).to_time.to_i

    if modified_since_seconds == file_last_modified_seconds
      send_not_modified(ctx, file_last_modified_seconds)
      return
    end
  end

  raf = nil
  begin
    raf = RandomAccessFile.new(path, 'r')
  rescue StandardError => _e
    send_error(ctx, HttpResponseStatus::NOT_FOUND)
    return
  end
  file_length = raf.length

  response = DefaultHttpResponse.new(HttpVersion::HTTP_1_1, HttpResponseStatus::OK)
  HttpUtil.setContentLength(response, file_length)
  content_type_header(response, guess_content_type(path))
  date_and_cache_headers(response, path)
  keep_alive_header(response) if HttpUtil.isKeepAlive(request)

  # Write the initial line and the header.
  ctx.write(response)

  send_file_future = nil
  last_content_future = nil
  progressive_promise = ctx.newProgressivePromise()

  # Write the content.
  if ctx.pipeline().get(SslHandler.java_class)
    # SSL enabled - cannot use zero-copy file transfer.
    chunked_file = ChunkedFile.new(raf, 0, file_length, 8192)
    chunked_input = HttpChunkedInput.new(chunked_file)
    send_file_future = ctx.writeAndFlush(chunked_input, progressive_promise)
    # HttpChunkedInput will write the end marker (LastHttpContent) for us.
    last_content_future = send_file_future
  else
    # SSL not enabled - can use zero-copy file transfer.
    file_region = DefaultFileRegion.new(raf.channel, 0, file_length)
    send_file_future = ctx.write(file_region, progressive_promise)
    # Write the end marker.
    last_content_future = ctx.writeAndFlush(LastHttpContent::EMPTY_LAST_CONTENT)
  end

  send_file_future.addListener(FileServerChannelProgressiveFutureListener.new)

  # Decide whether to close the connection or not.
  return if HttpUtil.isKeepAlive(request)

  # Close the connection when the whole content is written out.
  last_content_future.addListener(ChannelFutureListener::CLOSE)
end