ws: first message exchange. Still WIP, but we are getting there.
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@ -24,6 +24,10 @@ module Websocketc
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end
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end
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class Context
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class_property service : Websocketc::Service?
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end
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class Baguette::Configuration
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class Websocketc < Base
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property verbosity : Int32 = 2
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@ -42,6 +46,9 @@ class Relation
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# ws can send JSON messages instead of libipc-formated messages.
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property is_json : Bool
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property buffer_client : String = String.new
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property buffer_service : String = String.new
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def related? (fd : Int32)
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fd == @fd_client || fd == @fd_service
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end
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@ -79,6 +86,16 @@ class Relations < Array(Relation)
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each do |r|
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if r.related? fd
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Baguette::Log.debug "TODO: closing this relation: #{r}"
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Baguette::Log.warning "Before removing, here the switching list"
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sw = Context.service.not_nil!.context.switchdb
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pointer_ctx = Context.service.not_nil!.pointer
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LibIPC.ipc_switching_print pointerof(sw)
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LibIPC.ipc_del_fd pointer_ctx, r.fd_client
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LibIPC.ipc_del_fd pointer_ctx, r.fd_service
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LibIPC.ipc_switching_del pointerof(sw), r.fd_client
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all_fd.select! {|v| v != r.fd_client && v != r.fd_service }
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end
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end
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@ -88,109 +105,109 @@ end
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require "./network.cr"
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class Websocketc::Service < IPC::Server
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property relations : Relations = Relations.new
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property config : Baguette::Configuration::Websocketc
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def initialize(@config : Baguette::Configuration::Websocketc)
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super "ws"
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def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
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Baguette::Log.info "IN fd is #{fd}"
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Context.service.not_nil!.relations.search?(fd).try do |relation|
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message = nil
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begin
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message = relation.ws.run_once
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rescue e
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Baguette::Log.error "run_once FAILED: #{e}"
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Error
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end
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#def handle_request(event : IPC::Event::MessageReceived)
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# # send_now
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#end
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if relation.ws.ws.io.empty?
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more_to_read[0] = 0
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else
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more_to_read[0] = 1
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end
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# def handle_request(event : IPC::Event::MessageReceived)
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# request_start = Time.utc
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#
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# # TODO: The message can come from an already linked fd.
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#
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# request = Websocketc.requests.parse_ipc_json event.message
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#
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# if request.nil?
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# raise "unknown request type"
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# end
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#
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# request_name = request.class.name.sub /^Websocketc::Request::/, ""
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# Baguette::Log.debug "#{request_name}"
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#
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# response = begin
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# request.handle self, event
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# rescue e : Websocketc::Exception
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# Baguette::Log.error "Websocketc::Exception: #{request_name} => #{e}"
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# Websocketc::Response::Error.new "generic error"
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# rescue e
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# Baguette::Log.error "#{request_name} generic error #{e}"
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# Websocketc::Response::Error.new "unknown error"
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# end
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#
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# # If clients sent requests with an “id” field, it is copied
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# # in the responses. Allows identifying responses easily.
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# response.id = request.id
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#
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# send event.fd, response
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#
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# duration = Time.utc - request_start
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#
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# response_name = response.class.name.sub /^Websocketc::Response::/, ""
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#
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# if response.is_a? Websocketc::Response::Error
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# Baguette::Log.warning "#{response_name} (#{response.reason})"
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# else
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# Baguette::Log.debug "#{response_name} (Total duration: #{duration})"
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# end
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# end
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if relation.ws.closed?
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Baguette::Log.info "client closed the connection"
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Closing
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end
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def first_connection(event : IPC::Event::MessageReceived)
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# First message format: "URI"
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payload = String.new event.message.payload
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Baguette::Log.info "First message received: #{payload}"
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if message.nil?
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Baguette::Log.error "Reveiced a nil message"
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Closing
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end
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# TODO: handle exceptions and errors
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case message
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when String
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if relation.is_json
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Baguette::Log.warning "reassembling the message!"
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# Reassemble the message.
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m = relation.buffer_client + message
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pp! relation.buffer_client, message, m
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# Clean the buffer.
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relation.buffer_client = String.new
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begin
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uri = URI.parse payload
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ws = WebSocket.new uri
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is_json = uri.path.ends_with? ".JSON"
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pp! ws.ws
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# service_fd = ws.ws.io
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service_fd = 0
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relation = Relation.new event.fd, service_fd, ws, is_json
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pp! relation
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@relations << relation
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# Change client fd status.
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LibIPC.ipc_ctx_fd_type self.pointer, event.fd, LibIPC::ConnectionType::Switched
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# Add service fd as switched.
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LibIPC.ipc_add_fd_switched self.pointer, service_fd
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# Change service fd callbacks: only the service callbacks are changed,
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# since the associated client is a simple libipc client
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proc_cb_in = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
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proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
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# self.remove_fd event.fd
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LibIPC.ipc_switching_callbacks self.pointer, service_fd, proc_cb_in, proc_cb_out
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Baguette::Log.debug "new client: #{event.fd}"
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ipc_message = IPC::Message.from_json m
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ipc_message.copy_to_message_pointer pm
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rescue e
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Baguette::Log.error "cannot connect to #{payload}: #{e}"
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Baguette::Log.error "cannot send message coming from #{fd}"
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Baguette::Log.error "message: #{m}"
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Context.service.not_nil!.relations.remove fd
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Context.service.not_nil!.print_self
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Baguette::Log.error "error: #{e}"
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return LibIPC::IPCCB::Error
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end
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Baguette::Log.info "Let's say it's OK"
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send_now event.fd, 1.to_u8, "OK"
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return LibIPC::IPCCB::NoError
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end
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Baguette::Log.error "cannot handle non-json messages!"
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return LibIPC::IPCCB::Error
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when WebSocket::Ping
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Baguette::Log.debug "TODO: Received a ping message"
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return LibIPC::IPCCB::Ignore
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when WebSocket::NotFinal
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Baguette::Log.warning "Received only part of a message."
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relation.buffer_client += message.message
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return LibIPC::IPCCB::Ignore
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else
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# every other option should be dropped
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case message
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when WebSocket::Error
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Baguette::Log.error "An error occured"
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Error
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when WebSocket::Pong
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Baguette::Log.error "Received a pong message"
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return LibIPC::IPCCB::Ignore
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when WebSocket::Close
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Baguette::Log.debug "Received a close message"
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Closing
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when Bytes
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# TODO: when receiving a binary message
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# we should test the format and maybe its content
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Baguette::Log.error "Received a binary message: NOT IMPLEMENTED, YET"
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Error
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else
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Baguette::Log.error "Received a websocket message with unknown type"
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end
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end
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end
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def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
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return LibIPC::IPCCB::Error
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rescue e
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Baguette::Log.error "Exception (receiving a message) #{e}"
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# tcp = WrappedTCPFileDescriptor.new(fd: fd, family: Socket::Family::INET)
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# tcp.close
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Error
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end
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def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
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Baguette::Log.info "OUT fd is #{fd}"
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@relations.search?(fd).try do |relation|
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Context.service.not_nil!.relations.search?(fd).try do |relation|
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message = IPC::Message.new pm
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Baguette::Log.info "message to send: #{message}"
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@ -207,94 +224,71 @@ class Websocketc::Service < IPC::Server
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Baguette::Log.error "Wait, not supposed to get here. No relation?"
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return LibIPC::IPCCB::Error
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rescue e
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rescue e
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Baguette::Log.error "Exception during message transfer: #{e}"
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@relations.remove fd
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Context.service.not_nil!.relations.remove fd
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return LibIPC::IPCCB::Error
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end
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class Websocketc::Service < IPC::Server
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property relations : Relations = Relations.new
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property config : Baguette::Configuration::Websocketc
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def initialize(@config : Baguette::Configuration::Websocketc)
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super "ws"
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Context.service = self
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end
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def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
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Baguette::Log.info "IN fd is #{fd}"
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def print_self
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LibIPC.ipc_ctx_print self.pointer
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end
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def first_connection(event : IPC::Event::MessageReceived)
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# First message format: "URI"
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payload = String.new event.message.payload
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Baguette::Log.info "First message received: #{payload}"
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# TODO: handle exceptions and errors
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@relations.search?(fd).try do |relation|
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message = nil
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begin
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message = relation.ws.run_once
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uri = URI.parse payload
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ws = WebSocket.new uri
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is_json = uri.path.ends_with? ".JSON"
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service_fd = ws.ws.io.as(TCPSocket).fd
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relation = Relation.new event.fd, service_fd, ws, is_json
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@relations << relation
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# Change client fd status.
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LibIPC.ipc_ctx_fd_type self.pointer, event.fd, LibIPC::ConnectionType::Switched
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# Add service fd as switched.
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LibIPC.ipc_add_fd_switched self.pointer, service_fd
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# Link both file descriptors
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LibIPC.ipc_ctx_switching_add self.pointer, event.fd, service_fd
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# Change service fd callbacks: only the service callbacks are changed,
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# since the associated client is a simple libipc client
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proc_cb_in = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
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proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
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LibIPC.ipc_switching_callbacks self.pointer, service_fd, proc_cb_in, proc_cb_out
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Baguette::Log.debug "new client: #{event.fd}"
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rescue e
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Baguette::Log.error "run_once FAILED: #{e}"
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@relations.remove fd
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return LibIPC::IPCCB::Error
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Baguette::Log.error "cannot connect to #{payload}: #{e}"
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end
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if relation.ws.ws.io.empty?
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more_to_read[0] = 0
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else
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more_to_read[0] = 1
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Baguette::Log.info "Let's say it's OK"
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send_now event.fd, 1.to_u8, "OK"
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end
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if relation.ws.closed?
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Baguette::Log.info "client closed the connection"
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@relations.remove fd
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return LibIPC::IPCCB::Closing
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end
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if message.nil?
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Baguette::Log.error "Reveiced a nil message"
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@relations.remove fd
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return LibIPC::IPCCB::Closing
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end
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case message
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when String
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if relation.is_json
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ipc_message = IPC::Message.from_json(message)
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ipc_message.copy_to_message_pointer pm
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return LibIPC::IPCCB::NoError
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end
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when WebSocket::Ping
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Baguette::Log.debug "TODO: Received a ping message"
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return LibIPC::IPCCB::Ignore
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else
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# every other option should be dropped
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case message
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when WebSocket::Error
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Baguette::Log.error "An error occured"
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@relations.remove fd
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return LibIPC::IPCCB::Error
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when WebSocket::Pong
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Baguette::Log.error "Received a pong message"
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return LibIPC::IPCCB::Ignore
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when WebSocket::Close
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Baguette::Log.debug "Received a close message"
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@relations.remove fd
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return LibIPC::IPCCB::Closing
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when WebSocket::NotFinal
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Baguette::Log.warning "TODO: Received only part of a message."
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@relations.remove fd
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return LibIPC::IPCCB::Error
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when Bytes
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# TODO: when receiving a binary message
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# we should test the format and maybe its content
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Baguette::Log.error "Received a binary message: NOT IMPLEMENTED, YET"
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@relations.remove fd
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return LibIPC::IPCCB::Error
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else
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Baguette::Log.error "Received a websocket message with unknown type"
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end
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end
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end
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return LibIPC::IPCCB::Error
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rescue e
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Baguette::Log.error "Exception (receiving a message) #{e}"
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# tcp = WrappedTCPFileDescriptor.new(fd: fd, family: Socket::Family::INET)
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# tcp.close
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@relations.remove fd
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return LibIPC::IPCCB::Error
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end
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def run
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Baguette::Log.title "Starting websocketc"
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@ -324,13 +318,19 @@ class Websocketc::Service < IPC::Server
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Baguette::Log.error "relation: #{r}"
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else
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first_connection event
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Baguette::Log.warning "context currently is"
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print_self
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end
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when IPC::Event::Switch
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Baguette::Log.debug "switched message from #{event.fd}"
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when IPC::Exception
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Baguette::Log.warning "IPC::Exception: #{event.message}"
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else
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Baguette::Log.warning "unhandled IPC event: #{event.class}"
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exit 1
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end
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rescue e
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Baguette::Log.error "exception: #{typeof(e)} - #{e.message}"
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