Class: Tina4::WebSocket

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

Constant Summary collapse

GUID = 
WEBSOCKET_GUID

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ WebSocket

Returns a new instance of WebSocket.



38
39
40
41
42
43
44
45
46
47
 
# File 'lib/tina4/websocket.rb', line 38

def initialize
  @connections = {}
  @handlers = {
    open: [],
    message: [],
    close: [],
    error: []
  }
  @rooms = {}  # room_name => Set of conn_ids
end

Instance Attribute Details

#connections ⇒ Object (readonly)

Returns the value of attribute connections.



36
37
38
 
# File 'lib/tina4/websocket.rb', line 36

def connections
  @connections
end

Class Method Details

.route(path, &block) ⇒ Object

Register a WebSocket handler for a path (class method, matching Python’s WebSocketServer.route). The block receives a WebSocketConnection and should call conn.on_message / conn.on_close to wire up event callbacks.

Registers on the Router so routes work in integrated (Rack) mode.

Tina4::WebSocket.route("/chat") do |conn|
  conn.on_message { |data| conn.send(data) }
  conn.on_close   { puts "bye" }
end



156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
 
# File 'lib/tina4/websocket.rb', line 156

def self.route(path, &block)
  @route_handlers ||= {}
  @route_handlers[path] = block

  # Adapt to Router's (conn, event, data) style
  adapter = proc do |conn, event, data|
    case event
    when :open
      block.call(conn)
    when :message
      conn.on_message_handler&.call(data)
    when :close
      conn.on_close_handler&.call
    end
  end

  Tina4::Router.websocket(path, &adapter)
end

Instance Method Details

#_join_room(conn_id, room_name) ⇒ Object

Internal: add connection ID to a room (called by WebSocketConnection#join_room). Mirrors Python’s WebSocketManager._join_room — not part of the public API.



110
111
112
113
 
# File 'lib/tina4/websocket.rb', line 110

def _join_room(conn_id, room_name)
  @rooms[room_name] ||= Set.new
  @rooms[room_name].add(conn_id)
end

#_leave_room(conn_id, room_name) ⇒ Object

Internal: remove connection ID from a room (called by WebSocketConnection#leave_room). Mirrors Python’s WebSocketManager._leave_room — not part of the public API.



117
118
119
 
# File 'lib/tina4/websocket.rb', line 117

def _leave_room(conn_id, room_name)
  @rooms[room_name]&.delete(conn_id)
end

#broadcast(message, exclude: nil, path: nil) ⇒ Object 



88
89
90
91
92
93
94
 
# File 'lib/tina4/websocket.rb', line 88

def broadcast(message, exclude: nil, path: nil)
  @connections.each do |id, conn|
    next if exclude && id == exclude
    next if path && conn.path != path
    conn.send_text(message)
  end
end

#broadcast_to_room(room_name, message, exclude: nil) ⇒ Object 



138
139
140
141
142
143
 
# File 'lib/tina4/websocket.rb', line 138

def broadcast_to_room(room_name, message, exclude: nil)
  (get_room_connections(room_name)).each do |conn|
    next if exclude && conn.id == exclude
    conn.send_text(message)
  end
end

#close(conn_id, code: 1000, reason: "") ⇒ Object 



101
102
103
104
 
# File 'lib/tina4/websocket.rb', line 101

def close(conn_id, code: 1000, reason: "")
  conn = @connections[conn_id]
  conn&.close(code: code, reason: reason)
end

#emit(event, *args) ⇒ Object 



221
222
223
 
# File 'lib/tina4/websocket.rb', line 221

def emit(event, *args)
  @handlers[event]&.each { |h| h.call(*args) }
end

#get_client_rooms(client_id) ⇒ Object

Return list of room names a given client/connection id belongs to. Matches PHP Tina4WebSocket::getClientRooms($clientId).



127
128
129
130
131
 
# File 'lib/tina4/websocket.rb', line 127

def get_client_rooms(client_id)
  @rooms.each_with_object([]) do |(name, members), acc|
    acc << name if members.include?(client_id)
  end
end

#get_clients ⇒ Object 



58
59
60
 
# File 'lib/tina4/websocket.rb', line 58

def get_clients
  @connections
end

#get_room_connections(room_name) ⇒ Object 



133
134
135
136
 
# File 'lib/tina4/websocket.rb', line 133

def get_room_connections(room_name)
  ids = @rooms[room_name] || Set.new
  ids.filter_map { |id| @connections[id] }
end

#handle_upgrade(env, socket) ⇒ Object 



175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
 
# File 'lib/tina4/websocket.rb', line 175

def handle_upgrade(env, socket)
  key = env["HTTP_SEC_WEBSOCKET_KEY"]
  return unless key

  accept = Tina4.compute_accept_key(key)

  response = "HTTP/1.1 101 Switching Protocols\r\n" \
             "Upgrade: websocket\r\n" \
             "Connection: Upgrade\r\n" \
             "Sec-WebSocket-Accept: #{accept}\r\n\r\n"

  socket.write(response)

  conn_id = SecureRandom.hex(16)
  ws_path = env["REQUEST_PATH"] || env["PATH_INFO"] || "/"
  connection = WebSocketConnection.new(conn_id, socket, ws_server: self, path: ws_path)
  @connections[conn_id] = connection

  emit(:open, connection)

  Thread.new do
    begin
      loop do
        frame = connection.read_frame
        break unless frame

        case frame[:opcode]
        when 0x1 # Text
          emit(:message, connection, frame[:data])
        when 0x8 # Close
          break
        when 0x9 # Ping
          connection.send_pong(frame[:data])
        end
      end
    rescue => e
      emit(:error, connection, e)
    ensure
      @connections.delete(conn_id)
      remove_from_all_rooms(conn_id)
      emit(:close, connection)
      socket.close rescue nil
    end
  end
end

#on(event, &block) ⇒ Object 



49
50
51
 
# File 'lib/tina4/websocket.rb', line 49

def on(event, &block)
  @handlers[event.to_sym] << block if @handlers.key?(event.to_sym)
end

#remove_from_all_rooms(conn_id) ⇒ Object 



225
226
227
 
# File 'lib/tina4/websocket.rb', line 225

def remove_from_all_rooms(conn_id)
  @rooms.each_value { |members| members.delete(conn_id) }
end

#room_count(room_name) ⇒ Object 



121
122
123
 
# File 'lib/tina4/websocket.rb', line 121

def room_count(room_name)
  (@rooms[room_name] || Set.new).size
end

#send_to(conn_id, message) ⇒ Object 



96
97
98
99
 
# File 'lib/tina4/websocket.rb', line 96

def send_to(conn_id, message)
  conn = @connections[conn_id]
  conn&.send_text(message)
end

#start(host: "0.0.0.0", port: 7147) ⇒ Object 



62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'lib/tina4/websocket.rb', line 62

def start(host: "0.0.0.0", port: 7147)
  require "socket"
  @server_socket = TCPServer.new(host, port)
  @running = true
  @server_thread = Thread.new do
    while @running
      begin
        client = @server_socket.accept
        env = {}
        handle_upgrade(env, client)
      rescue => e
        break unless @running
      end
    end
  end
  self
end

#stop ⇒ Object 



80
81
82
83
84
85
86
 
# File 'lib/tina4/websocket.rb', line 80

def stop
  @running = false
  @server_socket&.close rescue nil
  @server_thread&.join(1)
  @connections.each_value { |conn| conn.close rescue nil }
  @connections.clear
end

#upgrade?(env) ⇒ Boolean

Returns:

  • (Boolean) 


53
54
55
56
 
# File 'lib/tina4/websocket.rb', line 53

def upgrade?(env)
  upgrade = env["HTTP_UPGRADE"] || ""
  upgrade.downcase == "websocket"
end