ws: compilable, still very WIP.

src/websocketc.cr

@@ -22,11 +22,6 @@ require "./lib_modifications.cr"
 module Websocketc
 	class Exception < ::Exception
 	end
-
-	class Context
-		class_property uri = "ws://localhost:1234/pong"
-		class_property rounds = 1
-	end
 end
 
 class Baguette::Configuration
@@ -40,64 +35,272 @@ class Baguette::Configuration
 	end
 end
 
+class Relation
+	property fd_client  : Int32
+	property fd_service : Int32
+	property ws         : WebSocket
+	# ws can send JSON messages instead of libipc-formated messages.
+	property is_json    : Bool
+
+	def related? (fd : Int32)
+		fd == @fd_client || fd == @fd_service
+	end
+
+	def initialize(@fd_client, @fd_service, @ws, @is_json)
+	end
+
+	def to_s(io)
+		c = "%4d" % @fd_client
+		s = "%4d" % @fd_service
+		j = if @is_json
+			"JSON"
+		else
+			"Not JSON"
+		end
+		io << "client #{c} service #{s} #{j}"
+	end
+end
+
+# Hide the complexity of managing relations.
+class Relations < Array(Relation)
+	property all_fd : Array(Int32) = Array(Int32).new
+	def <<(relation : Relation)
+		Baguette::Log.debug "Adding a new relation: #{relation}"
+		@all_fd << relation.fd_client
+		@all_fd << relation.fd_service
+		super relation
+	end
+
+	def search?(fd : Int32) : Relation?
+		find {|r| r.fd_client == fd || r.fd_service == fd }
+	end
+
+	def remove(fd : Int32)
+		each do |r|
+			if r.related? fd
+				Baguette::Log.debug "TODO: closing this relation: #{r}"
+				all_fd.select! {|v| v != r.fd_client && v != r.fd_service }
+			end
+		end
+		select! {|r| ! r.related? fd }
+	end
+end
 
 require "./network.cr"
 
-
 class Websocketc::Service < IPC::Server
-	property connections : Hash(Int32, WebSocket) = {} of Int32 => WebSocket
+	property relations : Relations = Relations.new
-	getter all_fd        : Array(Int32) = Array(Int32).new
+	property config    : Baguette::Configuration::Websocketc
-
-	property config           : Baguette::Configuration::Websocketc
 
 	def initialize(@config : Baguette::Configuration::Websocketc)
-		super "websocketc"
+		super "ws"
 	end
 
-	def handle_request(event : IPC::Event::MessageReceived)
+	#def handle_request(event : IPC::Event::MessageReceived)
-		request_start = Time.utc
+	#	# send_now 
+	#end
 
-		# TODO: The message can come from an already linked fd.
+#	def handle_request(event : IPC::Event::MessageReceived)
+#		request_start = Time.utc
+#
+#		# TODO: The message can come from an already linked fd.
+#
+#		request = Websocketc.requests.parse_ipc_json event.message
+#
+#		if request.nil?
+#			raise "unknown request type"
+#		end
+#
+#		request_name = request.class.name.sub /^Websocketc::Request::/, ""
+#		Baguette::Log.debug "#{request_name}"
+#
+#		response = begin
+#			request.handle self, event
+#		rescue e : Websocketc::Exception
+#			Baguette::Log.error "Websocketc::Exception: #{request_name} => #{e}"
+#			Websocketc::Response::Error.new "generic error"
+#		rescue e
+#			Baguette::Log.error "#{request_name} generic error #{e}"
+#			Websocketc::Response::Error.new "unknown error"
+#		end
+#
+#		# If clients sent requests with an “id” field, it is copied
+#		# in the responses. Allows identifying responses easily.
+#		response.id = request.id
+#
+#		send event.fd, response
+#
+#		duration = Time.utc - request_start
+#
+#		response_name = response.class.name.sub /^Websocketc::Response::/, ""
+#
+#		if response.is_a? Websocketc::Response::Error
+#			Baguette::Log.warning "#{response_name} (#{response.reason})"
+#		else
+#			Baguette::Log.debug "#{response_name} (Total duration: #{duration})"
+#		end
+#	end
 
-		request = Websocketc.requests.parse_ipc_json event.message
+	def first_connection(event : IPC::Event::MessageReceived)
+		# First message format: "URI"
+		payload = String.new event.message.payload
+		Baguette::Log.info "First message received: #{payload}"
 
-		if request.nil?
+		# TODO: handle exceptions and errors
-			raise "unknown request type"
-		end
 
-		request_name = request.class.name.sub /^Websocketc::Request::/, ""
+		begin
-		Baguette::Log.debug "<< #{request_name}"
+			uri = URI.parse payload
+			ws = WebSocket.new uri
+
+			is_json = uri.path.ends_with? ".JSON"
+
+			pp! ws.ws
+			# service_fd = ws.ws.io
+			service_fd = 0
+
+			relation = Relation.new event.fd, service_fd, ws, is_json
+			pp! relation
+			@relations << relation
+
+			# Change client fd status.
+
+			LibIPC.ipc_ctx_fd_type self.pointer, event.fd, LibIPC::ConnectionType::Switched
+
+			# Add service fd as switched.
+			LibIPC.ipc_add_fd_switched self.pointer, service_fd
+
+			# Change service fd callbacks: only the service callbacks are changed,
+			# since the associated client is a simple libipc client
+
+			proc_cb_in  = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
+			proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
+
+			# self.remove_fd event.fd
+			LibIPC.ipc_switching_callbacks self.pointer, service_fd, proc_cb_in, proc_cb_out
+
+			Baguette::Log.debug "new client: #{event.fd}"
 
-		response = begin
-			request.handle self, event
-		rescue e : Websocketc::Exception
-			Baguette::Log.error "Websocketc::Exception: #{request_name} => #{e}"
-			Websocketc::Response::Error.new "generic error"
 		rescue e
-			Baguette::Log.error "#{request_name} generic error #{e}"
+			Baguette::Log.error "cannot connect to #{payload}: #{e}"
-			Websocketc::Response::Error.new "unknown error"
 		end
 
-		# If clients sent requests with an “id” field, it is copied
+		Baguette::Log.info "Let's say it's OK"
-		# in the responses. Allows identifying responses easily.
+		send_now event.fd, 1.to_u8, "OK"
-		response.id = request.id
-
-		send event.fd, response
-
-		duration = Time.utc - request_start
-
-		response_name = response.class.name.sub /^Websocketc::Response::/, ""
-
-		if response.is_a? Websocketc::Response::Error
-			Baguette::Log.warning ">> #{response_name} (#{response.reason})"
-		else
-			Baguette::Log.debug ">> #{response_name} (Total duration: #{duration})"
-		end
 	end
 
+	def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
+		Baguette::Log.info "OUT fd is #{fd}"
+		@relations.search?(fd).try do |relation|
+			message = IPC::Message.new pm
+			Baguette::Log.info "message to send: #{message}"
+
+			if relation.is_json
+				buf = message.to_json
+			else
+				buf = message.to_packet
+			end
+
+			relation.ws.send buf
+			return LibIPC::IPCCB::NoError
+		end
+
+		Baguette::Log.error "Wait, not supposed to get here. No relation?"
+		return LibIPC::IPCCB::Error
+
+	rescue e
+		Baguette::Log.error "Exception during message transfer: #{e}"
+		@relations.remove fd
+		return LibIPC::IPCCB::Error
+	end
+
+	def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
+		Baguette::Log.info "IN fd is #{fd}"
+
+		@relations.search?(fd).try do |relation|
+			message = nil
+			begin
+				message = relation.ws.run_once
+			rescue e
+				Baguette::Log.error "run_once FAILED: #{e}"
+				@relations.remove fd
+				return LibIPC::IPCCB::Error
+			end
+
+			if relation.ws.ws.io.empty?
+				more_to_read[0] = 0
+			else
+				more_to_read[0] = 1
+			end
+
+			if relation.ws.closed?
+				Baguette::Log.info "client closed the connection"
+				@relations.remove fd
+				return LibIPC::IPCCB::Closing
+			end
+
+			if message.nil?
+				Baguette::Log.error "Reveiced a nil message"
+				@relations.remove fd
+				return LibIPC::IPCCB::Closing
+			end
+
+			case message
+			when String
+				if relation.is_json
+					ipc_message = IPC::Message.from_json(message)
+					ipc_message.copy_to_message_pointer pm
+					return LibIPC::IPCCB::NoError
+				end
+			when WebSocket::Ping
+				Baguette::Log.debug "TODO: Received a ping message"
+				return LibIPC::IPCCB::Ignore
+			else
+				# every other option should be dropped
+				case message
+				when WebSocket::Error
+					Baguette::Log.error "An error occured"
+					@relations.remove fd
+					return LibIPC::IPCCB::Error
+				when WebSocket::Pong
+					Baguette::Log.error "Received a pong message"
+					return LibIPC::IPCCB::Ignore
+				when WebSocket::Close
+					Baguette::Log.debug "Received a close message"
+					@relations.remove fd
+					return LibIPC::IPCCB::Closing
+				when WebSocket::NotFinal
+					Baguette::Log.warning "TODO: Received only part of a message."
+					@relations.remove fd
+					return LibIPC::IPCCB::Error
+				when Bytes
+					# TODO: when receiving a binary message
+					# we should test the format and maybe its content
+					Baguette::Log.error "Received a binary message: NOT IMPLEMENTED, YET"
+					@relations.remove fd
+					return LibIPC::IPCCB::Error
+				else
+					Baguette::Log.error "Received a websocket message with unknown type"
+				end
+			end
+		end
+
+		return LibIPC::IPCCB::Error
+	rescue e
+		Baguette::Log.error "Exception (receiving a message) #{e}"
+		# tcp = WrappedTCPFileDescriptor.new(fd: fd, family: Socket::Family::INET)
+		# tcp.close
+		@relations.remove fd
+		return LibIPC::IPCCB::Error
+	end
+
+
+
 	def run
 		Baguette::Log.title "Starting websocketc"
 
+		@timer      = @config.ipc_timer
+		@base_timer = @config.ipc_timer
+
 		self.loop do |event|
 			begin
 				case event
@@ -106,19 +309,22 @@ class Websocketc::Service < IPC::Server
 
 				when IPC::Event::Connection
 					Baguette::Log.debug "connection from #{event.fd}"
-					@all_fd << event.fd
 
 				when IPC::Event::Disconnection
 					Baguette::Log.debug "disconnection from #{event.fd}"
-					@all_fd.select! &.!=(event.fd)
+					@relations.remove event.fd
-					connections.delete event.fd
 
 				when IPC::Event::MessageSent
 					Baguette::Log.debug "message sent to #{event.fd}"
 
 				when IPC::Event::MessageReceived
 					Baguette::Log.debug "message received from #{event.fd}"
-					handle_request event
+					if r = @relations.search? event.fd
+						Baguette::Log.error "MessageReceived but from an already existent relation"
+						Baguette::Log.error "relation: #{r}"
+					else
+						first_connection event
+					end
 
 				when IPC::Exception
 					Baguette::Log.warning "IPC::Exception: #{event.message}"
@@ -149,14 +355,6 @@ class Websocketc::Service < IPC::Server
 
 
 		OptionParser.parse do |parser|
-			parser.on "-u uri", "--uri uri", "URI" do |opturi|
-				Websocketc::Context.uri = opturi
-			end
-
-			parser.on "-r rounds", "--rounds nb-messages", "Nb messages to send." do |opt|
-				Websocketc::Context.rounds = opt.to_i
-			end
-
 			parser.on "-h", "--help", "Show this help" do
 				puts parser
 				exit 0