Class: EventMachine::WebSocket::Connection
- Inherits:
-
Connection
- Object
- Connection
- EventMachine::WebSocket::Connection
- Includes:
- Debugger
- Defined in:
- lib/em-websocket/connection.rb
Constant Summary collapse
- ENCODING_SUPPORTED =
Cache encodings since it’s moderately expensive to look them up each time
"string".respond_to?(:force_encoding)
- UTF8 =
Encoding.find("UTF-8")
- BINARY =
Encoding.find("BINARY")
Instance Attribute Summary collapse
-
#max_frame_size ⇒ Object
Returns the maximum frame size which this connection is configured to accept.
Instance Method Summary collapse
-
#close_websocket(code = nil, body = nil) ⇒ Object
Use this method to close the websocket connection cleanly This sends a close frame and waits for acknowlegement before closing the connection.
- #dispatch(data) ⇒ Object
-
#initialize(options) ⇒ Connection
constructor
A new instance of Connection.
- #onclose(&blk) ⇒ Object
- #onerror(&blk) ⇒ Object
- #onmessage(&blk) ⇒ Object
-
#onopen(&blk) ⇒ Object
define WebSocket callbacks.
- #onping(&blk) ⇒ Object
- #onpong(&blk) ⇒ Object
-
#ping(body = '') ⇒ Object
Send a ping to the client.
-
#pingable? ⇒ Boolean
Test whether the connection is pingable (i.e. the WebSocket draft in use is >= 01).
-
#pong(body = '') ⇒ Object
Send an unsolicited pong message, as allowed by the protocol.
- #post_init ⇒ Object
- #receive_data(data) ⇒ Object
-
#send_binary(data) ⇒ Object
Send a WebSocket binary frame.
- #send_flash_cross_domain_file ⇒ Object
-
#send_text(data) ⇒ Object
(also: #send)
Send a WebSocket text frame.
- #state ⇒ Object
- #trigger_on_close ⇒ Object
- #trigger_on_error(reason) ⇒ Object
- #trigger_on_message(msg) ⇒ Object
- #trigger_on_open(handshake) ⇒ Object
- #trigger_on_ping(data) ⇒ Object
- #trigger_on_pong(data) ⇒ Object
- #unbind ⇒ Object
Constructor Details
#initialize(options) ⇒ Connection
Returns a new instance of Connection.
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# File 'lib/em-websocket/connection.rb', line 37 def initialize() @options = @debug = [:debug] || false @secure = [:secure] || false @secure_proxy = [:secure_proxy] || false @tls_options = [:tls_options] || {} debug [:initialize] end |
Instance Attribute Details
#max_frame_size ⇒ Object
Returns the maximum frame size which this connection is configured to accept. This can be set globally or on a per connection basis, and defaults to a value of 10MB if not set.
The behaviour when a too large frame is received varies by protocol, but in the newest protocols the connection will be closed with the correct close code (1009) immediately after receiving the frame header
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# File 'lib/em-websocket/connection.rb', line 234 def max_frame_size @max_frame_size || WebSocket.max_frame_size end |
Instance Method Details
#close_websocket(code = nil, body = nil) ⇒ Object
Use this method to close the websocket connection cleanly This sends a close frame and waits for acknowlegement before closing the connection
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# File 'lib/em-websocket/connection.rb', line 50 def close_websocket(code = nil, body = nil) if code && !(4000..4999).include?(code) raise "Application code may only use codes in the range 4000-4999" end # If code not defined then set to 1000 (normal closure) code ||= 1000 close_websocket_private(code, body) end |
#dispatch(data) ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 96 def dispatch(data) if data.match(/\A<policy-file-request\s*\/>/) send_flash_cross_domain_file else @handshake ||= begin handshake = Handshake.new(@secure || @secure_proxy) handshake.callback { |upgrade_response, handler_klass| debug [:accepting_ws_version, handshake.protocol_version] debug [:upgrade_response, upgrade_response] self.send_data(upgrade_response) @handler = handler_klass.new(self, @debug) @handshake = nil trigger_on_open(handshake) } handshake.errback { |e| debug [:error, e] trigger_on_error(e) # Handshake errors require the connection to be aborted abort } handshake end @handshake.receive_data(data) end end |
#onclose(&blk) ⇒ Object
10 |
# File 'lib/em-websocket/connection.rb', line 10 def onclose(&blk); @onclose = blk; end |
#onerror(&blk) ⇒ Object
11 |
# File 'lib/em-websocket/connection.rb', line 11 def onerror(&blk); @onerror = blk; end |
#onmessage(&blk) ⇒ Object
12 |
# File 'lib/em-websocket/connection.rb', line 12 def (&blk); @onmessage = blk; end |
#onopen(&blk) ⇒ Object
define WebSocket callbacks
9 |
# File 'lib/em-websocket/connection.rb', line 9 def onopen(&blk); @onopen = blk; end |
#onping(&blk) ⇒ Object
13 |
# File 'lib/em-websocket/connection.rb', line 13 def onping(&blk); @onping = blk; end |
#onpong(&blk) ⇒ Object
14 |
# File 'lib/em-websocket/connection.rb', line 14 def onpong(&blk); @onpong = blk; end |
#ping(body = '') ⇒ Object
Send a ping to the client. The client must respond with a pong.
In the case that the client is running a WebSocket draft < 01, false is returned since ping & pong are not supported
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# File 'lib/em-websocket/connection.rb', line 190 def ping(body = '') if @handler @handler.pingable? ? @handler.send_frame(:ping, body) && true : false else raise WebSocketError, "Cannot ping before onopen callback" end end |
#pingable? ⇒ Boolean
Test whether the connection is pingable (i.e. the WebSocket draft in use is >= 01)
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# File 'lib/em-websocket/connection.rb', line 214 def pingable? if @handler @handler.pingable? else raise WebSocketError, "Cannot test whether pingable before onopen callback" end end |
#pong(body = '') ⇒ Object
Send an unsolicited pong message, as allowed by the protocol. The client is not expected to respond to this message.
em-websocket automatically takes care of sending pong replies to incoming ping messages, as the protocol demands.
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# File 'lib/em-websocket/connection.rb', line 204 def pong(body = '') if @handler @handler.pingable? ? @handler.send_frame(:pong, body) && true : false else raise WebSocketError, "Cannot ping before onopen callback" end end |
#post_init ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 61 def post_init start_tls(@tls_options) if @secure end |
#receive_data(data) ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 65 def receive_data(data) debug [:receive_data, data] if @handler @handler.receive_data(data) else dispatch(data) end rescue WSProtocolError => e debug [:error, e] trigger_on_error(e) close_websocket_private(e.code) rescue => e debug [:error, e] # These are application errors - raise unless onerror defined trigger_on_error(e) || raise(e) # There is no code defined for application errors, so use 3000 # (which is reserved for frameworks) close_websocket_private(3000) end |
#send_binary(data) ⇒ Object
Send a WebSocket binary frame.
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# File 'lib/em-websocket/connection.rb', line 177 def send_binary(data) if @handler @handler.send_frame(:binary, data) else raise WebSocketError, "Cannot send binary before onopen callback" end end |
#send_flash_cross_domain_file ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 126 def send_flash_cross_domain_file file = '<?xml version="1.0"?><cross-domain-policy><allow-access-from domain="*" to-ports="*"/></cross-domain-policy>' debug [:cross_domain, file] send_data file # handle the cross-domain request transparently # no need to notify the user about this connection @onclose = nil close_connection_after_writing end |
#send_text(data) ⇒ Object Also known as: send
Send a WebSocket text frame.
A WebSocketError may be raised if the connection is in an opening or a closing state, or if the passed in data is not valid UTF-8
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# File 'lib/em-websocket/connection.rb', line 147 def send_text(data) # If we're using Ruby 1.9, be pedantic about encodings if ENCODING_SUPPORTED # Also accept ascii only data in other encodings for convenience unless (data.encoding == UTF8 && data.valid_encoding?) || data.ascii_only? raise WebSocketError, "Data sent to WebSocket must be valid UTF-8 but was #{data.encoding} (valid: #{data.valid_encoding?})" end # This labels the encoding as binary so that it can be combined with # the BINARY framing data.force_encoding(BINARY) else # TODO: Check that data is valid UTF-8 end if @handler @handler.send_text_frame(data) else raise WebSocketError, "Cannot send data before onopen callback" end # Revert data back to the original encoding (which we assume is UTF-8) # Doing this to avoid duping the string - there may be a better way data.force_encoding(UTF8) if ENCODING_SUPPORTED return nil end |
#state ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 222 def state @handler ? @handler.state : :handshake end |
#trigger_on_close ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 22 def trigger_on_close @onclose.call if @onclose end |
#trigger_on_error(reason) ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 31 def trigger_on_error(reason) return false unless @onerror @onerror.call(reason) true end |
#trigger_on_message(msg) ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 16 def (msg) @onmessage.call(msg) if @onmessage end |
#trigger_on_open(handshake) ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 19 def trigger_on_open(handshake) @onopen.call(handshake) if @onopen end |
#trigger_on_ping(data) ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 25 def trigger_on_ping(data) @onping.call(data) if @onping end |
#trigger_on_pong(data) ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 28 def trigger_on_pong(data) @onpong.call(data) if @onpong end |
#unbind ⇒ Object
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# File 'lib/em-websocket/connection.rb', line 86 def unbind debug [:unbind, :connection] @handler.unbind if @handler rescue => e debug [:error, e] # These are application errors - raise unless onerror defined trigger_on_error(e) || raise(e) end |