ws: compilable, still very WIP.
parent
772389ab41
commit
59b701c03e
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@ -22,11 +22,6 @@ require "./lib_modifications.cr"
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module Websocketc
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class Exception < ::Exception
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end
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class Context
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class_property uri = "ws://localhost:1234/pong"
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class_property rounds = 1
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end
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end
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class Baguette::Configuration
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@ -40,64 +35,272 @@ class Baguette::Configuration
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end
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end
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class Relation
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property fd_client : Int32
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property fd_service : Int32
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property ws : WebSocket
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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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def related? (fd : Int32)
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fd == @fd_client || fd == @fd_service
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end
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def initialize(@fd_client, @fd_service, @ws, @is_json)
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end
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def to_s(io)
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c = "%4d" % @fd_client
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s = "%4d" % @fd_service
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j = if @is_json
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"JSON"
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else
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"Not JSON"
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end
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io << "client #{c} service #{s} #{j}"
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end
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end
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# Hide the complexity of managing relations.
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class Relations < Array(Relation)
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property all_fd : Array(Int32) = Array(Int32).new
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def <<(relation : Relation)
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Baguette::Log.debug "Adding a new relation: #{relation}"
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@all_fd << relation.fd_client
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@all_fd << relation.fd_service
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super relation
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end
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def search?(fd : Int32) : Relation?
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find {|r| r.fd_client == fd || r.fd_service == fd }
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end
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def remove(fd : Int32)
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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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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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select! {|r| ! r.related? fd }
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end
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end
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require "./network.cr"
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class Websocketc::Service < IPC::Server
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property connections : Hash(Int32, WebSocket) = {} of Int32 => WebSocket
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getter all_fd : Array(Int32) = Array(Int32).new
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property config : Baguette::Configuration::Websocketc
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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 "websocketc"
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super "ws"
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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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#def handle_request(event : IPC::Event::MessageReceived)
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# # send_now
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#end
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# TODO: The message can come from an already linked fd.
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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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request = Websocketc.requests.parse_ipc_json event.message
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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 request.nil?
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raise "unknown request type"
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end
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# TODO: handle exceptions and errors
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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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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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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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Baguette::Log.error "cannot connect to #{payload}: #{e}"
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end
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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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send event.fd, response
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duration = Time.utc - request_start
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response_name = response.class.name.sub /^Websocketc::Response::/, ""
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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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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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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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message = IPC::Message.new pm
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Baguette::Log.info "message to send: #{message}"
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if relation.is_json
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buf = message.to_json
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else
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buf = message.to_packet
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end
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relation.ws.send buf
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return LibIPC::IPCCB::NoError
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end
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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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Baguette::Log.error "Exception during message transfer: #{e}"
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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 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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@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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@relations.remove fd
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return LibIPC::IPCCB::Error
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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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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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@timer = @config.ipc_timer
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@base_timer = @config.ipc_timer
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self.loop do |event|
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begin
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case event
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@ -106,19 +309,22 @@ class Websocketc::Service < IPC::Server
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when IPC::Event::Connection
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Baguette::Log.debug "connection from #{event.fd}"
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@all_fd << event.fd
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when IPC::Event::Disconnection
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Baguette::Log.debug "disconnection from #{event.fd}"
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@all_fd.select! &.!=(event.fd)
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connections.delete event.fd
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@relations.remove event.fd
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when IPC::Event::MessageSent
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Baguette::Log.debug "message sent to #{event.fd}"
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when IPC::Event::MessageReceived
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Baguette::Log.debug "message received from #{event.fd}"
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handle_request event
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if r = @relations.search? event.fd
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Baguette::Log.error "MessageReceived but from an already existent relation"
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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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end
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when IPC::Exception
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Baguette::Log.warning "IPC::Exception: #{event.message}"
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@ -149,14 +355,6 @@ class Websocketc::Service < IPC::Server
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OptionParser.parse do |parser|
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parser.on "-u uri", "--uri uri", "URI" do |opturi|
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Websocketc::Context.uri = opturi
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end
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parser.on "-r rounds", "--rounds nb-messages", "Nb messages to send." do |opt|
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Websocketc::Context.rounds = opt.to_i
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end
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parser.on "-h", "--help", "Show this help" do
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puts parser
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exit 0
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