Old and new websocketd implementations.
parent
c57a7e8748
commit
69a1a3a337
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@ -18,6 +18,8 @@ dependencies:
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targets:
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websocketd:
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main: src/websocketd.cr
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websocketd-new:
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main: src/websocketd-new.cr
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websocketc:
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main: src/websocketc.cr
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@ -38,7 +38,14 @@ class HTTP::WebSocket
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record Pong
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record Close
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record Error
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record NotFinal
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# record NotFinal
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struct NotFinal
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property message : String
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property info : Protocol::PacketInfo
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def initialize(@message, @info)
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end
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end
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# :nodoc:
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def run_once : Bytes | String | Close | Ping | Pong | NotFinal | Error
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@ -47,8 +54,6 @@ class HTTP::WebSocket
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rescue IO::EOFError
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close
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return Error.new
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rescue
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return Error.new
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end
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case info.opcode
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@ -75,6 +80,8 @@ class HTTP::WebSocket
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@on_message.try &.call(@current_message.to_s)
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@current_message.clear
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return String.new message
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else
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return NotFinal.new String.new(message), info
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end
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when Protocol::Opcode::BINARY
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message = @buffer[0, info.size]
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@ -95,7 +102,7 @@ class HTTP::WebSocket
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end
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end
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return NotFinal.new
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raise "what the fuck?"
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end
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# Returns the websocket instance.
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@ -115,7 +122,7 @@ class WebSocket < HTTP::WebSocket
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getter? closed = false
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def finalize
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# puts "WebSocket garbage collection!!"
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# puts "WrappedTCPFileDescriptor garbage collection!!"
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# super
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end
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end
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@ -0,0 +1,343 @@
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require "option_parser"
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require "ipc"
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require "socket"
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require "./colors"
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require "colorize"
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require "json"
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require "socket"
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require "http/server"
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require "base64"
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require "digest"
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require "./utils"
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require "baguette-crystal-base"
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require "./instance_storage.cr"
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# All modifications to standard libraries go there.
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require "./lib_modifications.cr"
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class Context
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# service instance parameters
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# they can be changed via the cli
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class_property service_name : String = "websocket"
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class_property host : String = "0.0.0.0"
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class_property port_to_listen : UInt16 = 1234
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class_property timer_delay : Int32 = 30_000 # 30 seconds
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end
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OptionParser.parse do |parser|
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parser.on "-l host", "--l host", "IP address to listen on." do |h|
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Context.host = h
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end
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parser.on "-p port", "--port port", "Port to listen on." do |port|
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Context.port_to_listen = port.to_u16
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end
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parser.on "-s service-name", "--service-name service-name", "Service name." do |name|
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Context.service_name = name
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end
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parser.on "-t timer-delay", "--timer-delay timer-delay", "Timer delay (in seconds)" do |t|
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Context.timer_delay = t.to_i32 * 1000 # stored in ms
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end
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parser.on "-v verbosity-level", "--verbosity level", "Verbosity." do |opt|
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Baguette::Context.verbosity = 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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end
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end
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def sending_ping_messages
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Context.context.fd_to_websocket.each do |fd, ws|
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begin
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ws.ping "hello from #{fd}"
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rescue e
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Baguette::Log.error "Exception: #{e}, already closed client #{fd}"
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begin
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Context.context.remove_fd fd
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rescue e
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Baguette::Log.error "Cannot remove #{fd} from clients: #{e}"
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end
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end
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end
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end
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def ws_http_upgrade(client)
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request = HTTP::Request.from_io client
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if request.nil?
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raise "#REQUEST IS NIL"
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end
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if request.is_a? HTTP::Status && request == HTTP::Status::BAD_REQUEST
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raise "BAD REQUEST DAZE~"
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end
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if request.is_a? HTTP::Status
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raise "Not bad request but still pretty bad: #{request.to_s}"
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end
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# FIXME: check they actually wanted to upgrade to websocket
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key = request.headers["Sec-WebSocket-Key"]
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response_key = Digest::SHA1.base64digest key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
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# Baguette::Log.debug response_key
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# HTTP inside bru
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headers_header = "HTTP/1.1 101 Switching Protocols"
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headers = HTTP::Headers {
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"Upgrade" => "websocket",
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"Connection" => "Upgrade",
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"Sec-WebSocket-Accept" => response_key
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}
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headers = headers.map { |key, value| "#{key}: #{value[0]}\r\n" }.join
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# requested service, fd
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req_service = request.path.lchop.sub "ws/", ""
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if req_service.ends_with? ".JSON"
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Context.context.is_json[client.fd] = true
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req_service = req_service.gsub /.JSON$/, ""
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else
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Context.context.is_json[client.fd] = false
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end
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# puts "#{headers_header}\n#{headers.to_s}\r\n"
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client.send "#{headers_header}\n#{headers.to_s}\r\n"
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wsclient = WebSocket.new client
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wsclient.on_pong do |m|
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Baguette::Log.debug "pong #{m}"
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end
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# registering the client into storing structures to avoid being garbage collected
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Context.context.fd_to_socket[client.fd] = client
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Context.context.fd_to_websocket[client.fd] = wsclient
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return req_service, request
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rescue e
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Baguette::Log.error "Exception in ws_http_upgrade: #{e}"
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raise "DROP IT"
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end
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def handle_new_clients(service, server)
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# TODO: this is a lot of C-like notation, should be changed.
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# In the client accept function
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# 1. accept TCP/WS connection
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client = server.accept
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# 2. upgrade HTTP connections and get the service name in the URI path.
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req_service, request = ws_http_upgrade client
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# 3. connect to the service via ipc_connection_switched
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serverfd : Int32 = 0
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# LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, Pointer(Libc::Int).null
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spointer = pointerof(serverfd)
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if req_service == "tracker"
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req_service = "tracking"
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end
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LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, spointer
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if serverfd == 0
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raise "Could not connect to #{req_service}"
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end
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# 4. change client callbacks via ipc_switching_callbacks
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# only the client callbacks are changed, since the associated server is a simple libipc service
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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 service.pointer, client.fd, proc_cb_in, proc_cb_out
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# 5. In case the requested service is trackingd,
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# the websocketd has to provide the IP address as the first message.
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if req_service == "tracking"
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# The proxy is configured to provide the X-Real-IP in the headers.
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# If not found, we use the client address from the socket.
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real_ip_address = request.headers["X-Real-IP"] || client.remote_address.address
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Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{serverfd}"
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# sfd = Context.context.switchtable[client.fd]
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# message = IPC::Message.from_json(JSON).to_packet
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# => JSON has to include these attributes: mtype, utype, payload
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# message = IPC::Message.new mtype, utype, payload
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# remote_address = client.remote_address.address
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message = IPC::Message.new serverfd, 1, 1.to_u8, "{\"ipaddress\": \"#{real_ip_address}\"}"
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service.send message
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# serv = WrappedTCPFileDescriptor.new(fd: serverfd, family: Socket::Family::INET)
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# serv.send message.to_packet
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end
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Baguette::Log.debug "new client: #{client.fd}"
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rescue e
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Baguette::Log.error "Exception in handle_new_client: #{e}"
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unless client.nil?
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client.close
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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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# Baguette::Log.info "OUT fd is #{fd}"
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wsclient = Context.context.fd_to_websocket[fd]
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message = IPC::Message.new pm
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# pp! message
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if Context.context.is_json[fd]
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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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wsclient.send buf
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return LibIPC::IPCCB::NoError
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rescue e
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Baguette::Log.error "Exception during message transfer: #{e}"
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Context.context.remove_fd 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.debug "IN fd is #{fd}"
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wsclient = Context.context.fd_to_websocket[fd]
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message = nil
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begin
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message = wsclient.run_once
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rescue e
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Baguette::Log.error "run_once FAILED: #{e}"
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Context.context.remove_fd fd
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return LibIPC::IPCCB::Error
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end
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if wsclient.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 wsclient.closed?
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Baguette::Log.info "client closed the connection"
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Context.context.remove_fd 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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Context.context.remove_fd 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 Context.context.is_json[fd]
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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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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.context.remove_fd fd
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return LibIPC::IPCCB::Error
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when WebSocket::Ping
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Baguette::Log.debug "Received a ping message"
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Context.context.remove_fd fd
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return LibIPC::IPCCB::Ignore
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when WebSocket::Pong
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Baguette::Log.debug "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.context.remove_fd fd
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return LibIPC::IPCCB::Closing
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when WebSocket::NotFinal
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Baguette::Log.warning "Received only part of a message: NOT IMPLEMENTED"
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Context.context.remove_fd 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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Context.context.remove_fd 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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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.context.remove_fd fd
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return LibIPC::IPCCB::Error
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end
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class Context
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class_property context = InstanceStorage.new
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end
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def main
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# by default, listen on any IP address
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server = TCPServer.new(Context.host, Context.port_to_listen)
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service = IPC::Server.new Context.service_name
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service << server.fd
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# Every few seconds, the service should trigger the timer
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# Allowing the sending of Ping messages to clients
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service.base_timer = Context.timer_delay
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service.timer = Context.timer_delay
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service.loop do |event|
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# Baguette::Log.info "current state of the context:"
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# service.pp
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case event
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when IPC::Event::Timer
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Baguette::Log.debug "IPC::Event::Timer"
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sending_ping_messages
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when IPC::Event::Connection
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Baguette::Log.debug "IPC::Event::Connection: fd #{event.fd}"
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when IPC::Event::Disconnection
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Baguette::Log.debug "IPC::Event::Disconnection: fd #{event.fd}"
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Context.context.remove_fd event.fd
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when IPC::Event::ExtraSocket
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Baguette::Log.debug "IPC::Event::ExtraSocket: fd #{event.fd}"
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if server.fd != event.fd
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raise "Error: the only extra socket should be the TCP/WS server"
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end
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handle_new_clients(service, server)
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when IPC::Event::Switch
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Baguette::Log.debug "IPC::Event::Switch: fd #{event.fd}"
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# raise "Not implemented."
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when IPC::Event::MessageSent
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Baguette::Log.debug "IPC::Event::MessageSent: fd #{event.fd}"
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when IPC::Event::MessageReceived
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Baguette::Log.debug "IPC::Event::Message: fd #{event.fd}"
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raise "Not implemented."
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end
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end
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end
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main
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@ -3,8 +3,6 @@ require "ipc"
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require "socket"
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require "./colors"
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require "colorize"
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require "json"
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require "socket"
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@ -15,7 +13,7 @@ require "./utils"
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require "baguette-crystal-base"
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require "./instance_storage.cr"
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require "colorize"
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# All modifications to standard libraries go there.
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require "./lib_modifications.cr"
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@ -23,10 +21,13 @@ require "./lib_modifications.cr"
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class Context
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# service instance parameters
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# they can be changed via the cli
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class_property service_name : String = "websocket"
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class_property host : String = "0.0.0.0"
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class_property service_name = "websocket"
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class_property host = "0.0.0.0"
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class_property port_to_listen : UInt16 = 1234
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class_property timer_delay : Int32 = 30_000 # 30 seconds
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class_property timer_delay : Int32 = 30_000.to_i32
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class_property print_messages = false
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class_property print_timer = false
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end
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OptionParser.parse do |parser|
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@ -43,36 +44,124 @@ OptionParser.parse do |parser|
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end
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parser.on "-t timer-delay", "--timer-delay timer-delay", "Timer delay (in seconds)" do |t|
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Context.timer_delay = t.to_i32 * 1000 # stored in ms
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Context.timer_delay = t.to_i32 * 1000
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end
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parser.on "-v verbosity-level", "--verbosity level", "Verbosity." do |opt|
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Baguette::Context.verbosity = opt.to_i
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end
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parser.on "-T", "--print-timer", "Print timer." do
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Context.print_timer = true
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end
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parser.on "-M", "--print-messages", "Print messages received and sent." do
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Context.print_messages = true
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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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end
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end
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def sending_ping_messages
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Context.context.fd_to_websocket.each do |fd, ws|
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begin
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ws.ping "hello from #{fd}"
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rescue e
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Baguette::Log.error "Exception: #{e}, already closed client #{fd}"
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begin
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Context.context.remove_fd fd
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rescue e
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Baguette::Log.error "Cannot remove #{fd} from clients: #{e}"
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end
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# Link between fd and TCPSocket, WebSocket and IPC::Client instances.
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class InstanceStorage
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property service : IPC::SwitchingService
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property switchtable : Hash(Int32, Int32)
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property is_client : Hash(Int32,Bool)
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property is_json : Hash(Int32, Bool)
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property fd_to_tcpsocket : Hash(Int32, TCPSocket)
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property fd_to_websocket : Hash(Int32, WebSocket)
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property fd_to_ipcclient : Hash(Int32, IPC::Client)
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def initialize (@service : IPC::SwitchingService)
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# fdlist_client = [] of TCPSocket
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@switchtable = Hash(Int32, Int32).new
|
||||
@is_client = Hash(Int32,Bool).new
|
||||
@is_json = Hash(Int32,Bool).new
|
||||
@fd_to_tcpsocket = Hash(Int32, TCPSocket).new
|
||||
@fd_to_websocket = Hash(Int32, WebSocket).new
|
||||
@fd_to_ipcclient = Hash(Int32, IPC::Client).new
|
||||
end
|
||||
|
||||
def remove_fd (fdclient : Int32)
|
||||
Baguette::Log.info "closing the client:#{CRESET} #{fdclient}"
|
||||
if fdclient == -1
|
||||
raise "fdclient is -1, nothing to do with it"
|
||||
end
|
||||
|
||||
begin
|
||||
# 1. closing both the client and the service
|
||||
tcpfdc = @fd_to_tcpsocket[fdclient]
|
||||
|
||||
# 2. closing the TCP connections
|
||||
tcpfdc.close unless tcpfdc.closed?
|
||||
rescue e
|
||||
Baguette::Log.error "remove_fd: 1 #{e}"
|
||||
end
|
||||
|
||||
# 3. removing the client and the service fds from the loop check
|
||||
begin
|
||||
@service.remove_fd (fdclient)
|
||||
rescue e
|
||||
Baguette::Log.error "remove_fd: 2 #{e}"
|
||||
end
|
||||
|
||||
# 5. removing both the client and the service from the switchtable
|
||||
fdservice = @switchtable[fdclient]?
|
||||
@switchtable = @switchtable.select do |fdc, fds|
|
||||
fdc != fdclient && fds != fdclient
|
||||
end
|
||||
|
||||
# 6. removing the client and the service from is_client
|
||||
@is_client = @is_client.select do |fd,v| fd != fdclient end
|
||||
@is_json = @is_json.select do |fd,v| fd != fdclient end
|
||||
|
||||
@fd_to_websocket.select! do |fd, ws|
|
||||
fd != fdclient
|
||||
end
|
||||
|
||||
begin
|
||||
if fdservice.nil?
|
||||
Baguette::Log.debug "client #{fdclient} aleady has its service removed"
|
||||
else
|
||||
@service.remove_fd (fdservice)
|
||||
|
||||
service = @fd_to_ipcclient[fdservice]
|
||||
@fd_to_ipcclient = @fd_to_ipcclient.select do |k, v|
|
||||
k != fdservice
|
||||
end
|
||||
|
||||
@is_client = @is_client.select do |fd,v| fd != fdservice end
|
||||
|
||||
# perform the close at the end
|
||||
# on crash, this service still is removed from the list of listened fd
|
||||
service.close
|
||||
end
|
||||
rescue e
|
||||
Baguette::Log.error "remove_fd: 3 #{e}"
|
||||
end
|
||||
rescue e
|
||||
Baguette::Log.error "in InstanceStorage#remove_fd: #{e}"
|
||||
end
|
||||
end
|
||||
|
||||
def ws_http_upgrade(client)
|
||||
class Context
|
||||
class_property service = IPC::SwitchingService.new service_name
|
||||
class_property context = InstanceStorage.new service
|
||||
end
|
||||
|
||||
# by default, listen on any IP address
|
||||
server = TCPServer.new(Context.host, Context.port_to_listen)
|
||||
Context.service << server.fd
|
||||
|
||||
def websocket_client_connection(client)
|
||||
request = HTTP::Request.from_io client
|
||||
if Context.print_messages
|
||||
pp! request
|
||||
end
|
||||
|
||||
if request.nil?
|
||||
raise "#REQUEST IS NIL"
|
||||
|
|
@ -86,10 +175,11 @@ def ws_http_upgrade(client)
|
|||
raise "Not bad request but still pretty bad: #{request.to_s}"
|
||||
end
|
||||
|
||||
|
||||
# FIXME: check they actually wanted to upgrade to websocket
|
||||
key = request.headers["Sec-WebSocket-Key"]
|
||||
response_key = Digest::SHA1.base64digest key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
|
||||
# Baguette::Log.debug response_key
|
||||
# puts response_key
|
||||
|
||||
# HTTP inside bru
|
||||
headers_header = "HTTP/1.1 101 Switching Protocols"
|
||||
|
|
@ -103,6 +193,13 @@ def ws_http_upgrade(client)
|
|||
|
||||
# requested service, fd
|
||||
req_service = request.path.lchop.sub "ws/", ""
|
||||
if req_service.empty?
|
||||
client.close
|
||||
return
|
||||
end
|
||||
|
||||
# The client may ask to transcript JSON-based messages into IPC messages.
|
||||
# To that end, the client may send the name of the service it wants to reach with the prefix ".JSON".
|
||||
|
||||
if req_service.ends_with? ".JSON"
|
||||
Context.context.is_json[client.fd] = true
|
||||
|
|
@ -111,233 +208,316 @@ def ws_http_upgrade(client)
|
|||
Context.context.is_json[client.fd] = false
|
||||
end
|
||||
|
||||
# puts "#{headers_header}\n#{headers.to_s}\r\n"
|
||||
# Hack to preserve the daemon naming convention.
|
||||
if req_service == "tracker"
|
||||
req_service = "tracking"
|
||||
end
|
||||
|
||||
websocket_connection_procedure req_service, client.fd
|
||||
|
||||
# If the requested service is trackingd, send the IP address of the client
|
||||
if req_service == "tracking"
|
||||
real_ip_address = request.headers["X-Real-IP"]? || client.remote_address.address
|
||||
|
||||
sfd = Context.context.switchtable[client.fd]
|
||||
Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{sfd}"
|
||||
# message = IPC::Message.from_json(JSON).to_packet
|
||||
# => JSON has to include these attributes: mtype, utype, payload
|
||||
# message = IPC::Message.new mtype, utype, payload
|
||||
message = IPC::Message.new sfd, 1, 1.to_u8, "{\"ipaddress\": \"#{real_ip_address}\"}"
|
||||
if Context.print_messages
|
||||
Baguette::Log.info "to trackingd: #{message.to_s}"
|
||||
end
|
||||
serv = WrappedTCPFileDescriptor.new(fd: sfd, family: Socket::Family::INET)
|
||||
serv.send message.to_packet
|
||||
end
|
||||
|
||||
if Context.print_messages
|
||||
Baguette::Log.info "to client: #{headers_header}\n#{headers.to_s}"
|
||||
end
|
||||
client.send "#{headers_header}\n#{headers.to_s}\r\n"
|
||||
|
||||
wsclient = WebSocket.new client
|
||||
wsclient.on_pong do |m|
|
||||
Baguette::Log.debug "pong #{m}"
|
||||
end
|
||||
Context.context.is_client[client.fd] = true
|
||||
|
||||
# listen to the client's file descriptor
|
||||
Context.context.service << client.fd
|
||||
# puts "#{CBLUE}new client: #{client.fd}#{CRESET}"
|
||||
|
||||
# registering the client into storing structures to avoid being garbage collected
|
||||
Context.context.fd_to_socket[client.fd] = client
|
||||
Context.context.fd_to_tcpsocket[client.fd] = client
|
||||
Context.context.fd_to_websocket[client.fd] = wsclient
|
||||
|
||||
return req_service, request
|
||||
rescue e
|
||||
Baguette::Log.error "Exception in ws_http_upgrade: #{e}"
|
||||
raise "DROP IT"
|
||||
end
|
||||
|
||||
def handle_new_clients(service, server)
|
||||
# TODO: this is a lot of C-like notation, should be changed.
|
||||
# In the client accept function
|
||||
# 1. accept TCP/WS connection
|
||||
client = server.accept
|
||||
|
||||
# 2. upgrade HTTP connections and get the service name in the URI path.
|
||||
req_service, request = ws_http_upgrade client
|
||||
|
||||
# 3. connect to the service via ipc_connection_switched
|
||||
serverfd : Int32 = 0
|
||||
# LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, Pointer(Libc::Int).null
|
||||
spointer = pointerof(serverfd)
|
||||
if req_service == "tracker"
|
||||
req_service = "tracking"
|
||||
end
|
||||
LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, spointer
|
||||
if serverfd == 0
|
||||
raise "Could not connect to #{req_service}"
|
||||
end
|
||||
|
||||
# 4. change client callbacks via ipc_switching_callbacks
|
||||
# only the client callbacks are changed, since the associated server is a simple libipc service
|
||||
proc_cb_in = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
|
||||
proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
|
||||
|
||||
LibIPC.ipc_switching_callbacks service.pointer, client.fd, proc_cb_in, proc_cb_out
|
||||
|
||||
# 5. In case the requested service is trackingd,
|
||||
# the websocketd has to provide the IP address as the first message.
|
||||
if req_service == "tracking"
|
||||
# The proxy is configured to provide the X-Real-IP in the headers.
|
||||
# If not found, we use the client address from the socket.
|
||||
real_ip_address = request.headers["X-Real-IP"] || client.remote_address.address
|
||||
|
||||
Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{serverfd}"
|
||||
# sfd = Context.context.switchtable[client.fd]
|
||||
# message = IPC::Message.from_json(JSON).to_packet
|
||||
# => JSON has to include these attributes: mtype, utype, payload
|
||||
# message = IPC::Message.new mtype, utype, payload
|
||||
# remote_address = client.remote_address.address
|
||||
message = IPC::Message.new serverfd, 1, 1.to_u8, "{\"ipaddress\": \"#{real_ip_address}\"}"
|
||||
service.send message
|
||||
# serv = WrappedTCPFileDescriptor.new(fd: serverfd, family: Socket::Family::INET)
|
||||
# serv.send message.to_packet
|
||||
end
|
||||
|
||||
Baguette::Log.debug "new client: #{client.fd}"
|
||||
rescue e
|
||||
Baguette::Log.error "Exception in handle_new_client: #{e}"
|
||||
unless client.nil?
|
||||
client.close
|
||||
end
|
||||
def closing_client (fdclient : Int)
|
||||
Baguette::Log.warning "Closing client #{fdclient}"
|
||||
Context.context.remove_fd fdclient
|
||||
end
|
||||
|
||||
def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
|
||||
# Baguette::Log.info "OUT fd is #{fd}"
|
||||
wsclient = Context.context.fd_to_websocket[fd]
|
||||
|
||||
message = IPC::Message.new pm
|
||||
# pp! message
|
||||
|
||||
if Context.context.is_json[fd]
|
||||
buf = message.to_json
|
||||
else
|
||||
buf = message.to_packet
|
||||
end
|
||||
|
||||
wsclient.send buf
|
||||
|
||||
return LibIPC::IPCCB::NoError
|
||||
rescue e
|
||||
Baguette::Log.error "Exception during message transfer: #{e}"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Error
|
||||
end
|
||||
|
||||
def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
|
||||
# Baguette::Log.debug "IN fd is #{fd}"
|
||||
|
||||
wsclient = Context.context.fd_to_websocket[fd]
|
||||
|
||||
message = nil
|
||||
# first message from the client: requested service name
|
||||
# 1. connection to the service
|
||||
# 2. listening on the service fd
|
||||
# 3. bounding both file descriptors (through switchtable hash)
|
||||
# 4. indicating that the client is connected (in is_client)
|
||||
def websocket_connection_procedure (requested_service : String, clientfd : Int32)
|
||||
begin
|
||||
message = wsclient.run_once
|
||||
# 1. establishing a connection to the service
|
||||
newservice = IPC::Client.new requested_service
|
||||
new_service_fd = newservice.fd.not_nil!
|
||||
Context.context.fd_to_ipcclient[new_service_fd] = newservice
|
||||
|
||||
# 2. listening on the client fd and the service fd
|
||||
Context.context.service << new_service_fd
|
||||
|
||||
# cannot perform automatic switching due to websockets headers
|
||||
# future version of the libipc lib should include some workaround, probably
|
||||
# service.switch.add fdclient, newservice.fd
|
||||
|
||||
# 3. bounding the client and the service fd
|
||||
Context.context.switchtable[clientfd] = new_service_fd
|
||||
Context.context.switchtable[new_service_fd] = clientfd
|
||||
|
||||
# 4. the client is then connected, send it a message
|
||||
Context.context.is_client[clientfd] = true
|
||||
Context.context.is_client[new_service_fd] = false
|
||||
rescue e
|
||||
Baguette::Log.error "run_once FAILED: #{e}"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Error
|
||||
Baguette::Log.error "Exception during connection to the service: #{e}"
|
||||
Context.context.remove_fd clientfd
|
||||
end
|
||||
end
|
||||
|
||||
if wsclient.ws.io.empty?
|
||||
more_to_read[0] = 0
|
||||
else
|
||||
more_to_read[0] = 1
|
||||
end
|
||||
class FragmentBuffer
|
||||
property buffer : String = String.new
|
||||
end
|
||||
|
||||
if wsclient.closed?
|
||||
Baguette::Log.info "client closed the connection"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Closing
|
||||
end
|
||||
def websocket_switching_procedure (activefd : Int)
|
||||
begin
|
||||
# Baguette::Log.title "activefd is #{activefd}"
|
||||
if Context.context.is_client[activefd]
|
||||
# Baguette::Log.title "activefd #{activefd} is a client"
|
||||
# The client is a WebSocket on top of a TCP connection
|
||||
client = Context.context.fd_to_tcpsocket[activefd]
|
||||
wsclient = Context.context.fd_to_websocket[activefd]
|
||||
|
||||
if message.nil?
|
||||
Baguette::Log.error "Reveiced a nil message"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Closing
|
||||
end
|
||||
fb = FragmentBuffer.new
|
||||
|
||||
case message
|
||||
when String
|
||||
if Context.context.is_json[fd]
|
||||
ipc_message = IPC::Message.from_json(message)
|
||||
ipc_message.copy_to_message_pointer pm
|
||||
return LibIPC::IPCCB::NoError
|
||||
end
|
||||
else
|
||||
# every other option should be dropped
|
||||
case message
|
||||
when WebSocket::Error
|
||||
Baguette::Log.error "An error occured"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Error
|
||||
when WebSocket::Ping
|
||||
Baguette::Log.debug "Received a ping message"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Ignore
|
||||
when WebSocket::Pong
|
||||
Baguette::Log.debug "Received a pong message"
|
||||
return LibIPC::IPCCB::Ignore
|
||||
when WebSocket::Close
|
||||
Baguette::Log.debug "Received a close message"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Closing
|
||||
when WebSocket::NotFinal
|
||||
Baguette::Log.warning "Received only part of a message: NOT IMPLEMENTED"
|
||||
Context.context.remove_fd 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"
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Error
|
||||
loop do
|
||||
begin
|
||||
message = wsclient.run_once
|
||||
rescue e
|
||||
Baguette::Log.error "Exception (receiving a message) #{e}"
|
||||
Context.context.remove_fd activefd
|
||||
break
|
||||
end
|
||||
|
||||
# Checking the internals of WebSocket, then the contained IO within, to know if there is still something to read in the socket.
|
||||
still_something_to_read = ! wsclient.ws.io.empty?
|
||||
|
||||
if wsclient.closed?
|
||||
Baguette::Log.info "client #{activefd} is closing"
|
||||
Context.context.remove_fd activefd
|
||||
break
|
||||
end
|
||||
|
||||
if message.nil?
|
||||
Baguette::Log.error "message received from #{activefd} is nil"
|
||||
Context.context.remove_fd activefd
|
||||
if still_something_to_read
|
||||
Baguette::Log.info "Still something to read, but #{activefd} was removed"
|
||||
next
|
||||
end
|
||||
break
|
||||
end
|
||||
|
||||
case message
|
||||
when WebSocket::Error
|
||||
Baguette::Log.error "An error occured with client #{activefd}"
|
||||
Context.context.remove_fd activefd
|
||||
if still_something_to_read
|
||||
Baguette::Log.debug "Still something to read, but #{activefd} was removed"
|
||||
next
|
||||
end
|
||||
return
|
||||
when WebSocket::Ping
|
||||
Baguette::Log.debug "Received a ping message"
|
||||
if still_something_to_read
|
||||
Baguette::Log.debug "Still something to read"
|
||||
next
|
||||
end
|
||||
break
|
||||
when WebSocket::Pong
|
||||
Baguette::Log.debug "Received a pong message"
|
||||
if still_something_to_read
|
||||
Baguette::Log.debug "Still something to read"
|
||||
next
|
||||
end
|
||||
break
|
||||
when WebSocket::Close
|
||||
Baguette::Log.debug "Received a close message"
|
||||
Context.context.remove_fd activefd
|
||||
if still_something_to_read
|
||||
Baguette::Log.debug "Still something to read"
|
||||
next
|
||||
end
|
||||
break
|
||||
|
||||
when WebSocket::NotFinal
|
||||
Baguette::Log.warning "Received only part of a message"
|
||||
# TODO: check if the message is OK when multiplexing
|
||||
# pp! message
|
||||
fb.buffer = fb.buffer + message.message
|
||||
if still_something_to_read
|
||||
Baguette::Log.debug "Still something to read"
|
||||
next
|
||||
end
|
||||
break
|
||||
|
||||
when Bytes
|
||||
# TODO: when receiving a binary message
|
||||
# we should test the format and maybe its content
|
||||
Baguette::Log.warning "Received a binary message (not supported)"
|
||||
if still_something_to_read
|
||||
Baguette::Log.info "Still something to read"
|
||||
next
|
||||
end
|
||||
end
|
||||
|
||||
# In case there was a previous messagee within a fragment.
|
||||
if fb.buffer.size > 0
|
||||
Baguette::Log.warning "SHOULD reconstitute the message!!"
|
||||
end
|
||||
if message.is_a?(String) && fb.buffer.size > 0
|
||||
Baguette::Log.warning "Reconstitute the message!!"
|
||||
message = fb.buffer + message
|
||||
|
||||
fb.buffer = String.new
|
||||
end
|
||||
|
||||
if Context.context.is_json[activefd] && message.is_a?(String)
|
||||
if Context.print_messages
|
||||
j = JSON.parse message
|
||||
Baguette::Log.info "received from client #{activefd}"
|
||||
pp! j["payload"]
|
||||
end
|
||||
message = IPC::Message.from_json(message).to_packet
|
||||
end
|
||||
|
||||
# client => service
|
||||
fdservice = Context.context.switchtable[activefd]
|
||||
|
||||
# XXX: this is not a TCP fd, but since behind the scene this is compatible, I'm hacking a bit
|
||||
# Also, I changed the "finalize" method of the TCPFileDescriptor class not to close the socket
|
||||
# when the object is GC.
|
||||
serv = WrappedTCPFileDescriptor.new(fd: fdservice, family: Socket::Family::INET)
|
||||
#serv = Context.context.fd_to_ipcclient[fdservice]
|
||||
serv.send message
|
||||
|
||||
break unless still_something_to_read
|
||||
|
||||
end # loop over the remaining messages to read on the websocket
|
||||
else
|
||||
Baguette::Log.error "Received a websocket message with unknown type"
|
||||
# service => client
|
||||
fdclient = Context.context.switchtable[activefd]
|
||||
wsclient = Context.context.fd_to_websocket[fdclient]
|
||||
|
||||
serv = Context.context.fd_to_ipcclient[activefd]
|
||||
message = serv.read
|
||||
|
||||
if Context.context.is_json[fdclient]
|
||||
buf = message.to_json
|
||||
if Context.print_messages
|
||||
j = JSON.parse buf
|
||||
Baguette::Log.info "received from service #{activefd}"
|
||||
pp! j["payload"]
|
||||
end
|
||||
else
|
||||
buf = message.to_packet
|
||||
end
|
||||
|
||||
wsclient.send buf
|
||||
end
|
||||
rescue e
|
||||
Baguette::Log.error "Exception during message transfer: #{e}"
|
||||
if Context.context.is_client[activefd]
|
||||
closing_client activefd
|
||||
else
|
||||
clientfd = Context.context.switchtable[activefd]
|
||||
closing_client clientfd
|
||||
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
|
||||
Context.context.remove_fd fd
|
||||
return LibIPC::IPCCB::Error
|
||||
end
|
||||
|
||||
class Context
|
||||
class_property context = InstanceStorage.new
|
||||
def sending_ping_messages
|
||||
Context.context.fd_to_websocket.each do |fd, ws|
|
||||
begin
|
||||
ws.ping "hello from #{fd}"
|
||||
rescue e
|
||||
Baguette::Log.error "#{CRED}Exception: #{e}#{CRESET}, already closed client #{fd}"
|
||||
begin
|
||||
Context.context.remove_fd fd
|
||||
rescue e
|
||||
Baguette::Log.error "#{CRED}Cannot remove #{fd} from clients: #{e}#{CRESET}"
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
def main
|
||||
# by default, listen on any IP address
|
||||
server = TCPServer.new(Context.host, Context.port_to_listen)
|
||||
service = IPC::Server.new Context.service_name
|
||||
service << server.fd
|
||||
# Every few seconds, the service should trigger the timer
|
||||
# Allowing the sending of Ping messages to clients
|
||||
Context.service.base_timer = Context.timer_delay
|
||||
|
||||
# Every few seconds, the service should trigger the timer
|
||||
# Allowing the sending of Ping messages to clients
|
||||
service.base_timer = Context.timer_delay
|
||||
service.timer = Context.timer_delay
|
||||
|
||||
service.loop do |event|
|
||||
# Baguette::Log.info "current state of the context:"
|
||||
# service.pp
|
||||
Context.service.loop do |event|
|
||||
begin
|
||||
case event
|
||||
when IPC::Event::Timer
|
||||
Baguette::Log.debug "IPC::Event::Timer"
|
||||
Baguette::Log.info "IPC::Event::Timer" if Context.print_timer
|
||||
sending_ping_messages
|
||||
|
||||
when IPC::Event::Connection
|
||||
Baguette::Log.debug "IPC::Event::Connection: fd #{event.fd}"
|
||||
Baguette::Log.debug "IPC::Event::Connection: #{event.fd}"
|
||||
|
||||
when IPC::Event::Disconnection
|
||||
Baguette::Log.debug "IPC::Event::Disconnection: fd #{event.fd}"
|
||||
Context.context.remove_fd event.fd
|
||||
Baguette::Log.debug "IPC::Event::Disconnection: #{event.fd}"
|
||||
|
||||
when IPC::Event::ExtraSocket
|
||||
Baguette::Log.debug "IPC::Event::ExtraSocket: fd #{event.fd}"
|
||||
if server.fd != event.fd
|
||||
raise "Error: the only extra socket should be the TCP/WS server"
|
||||
Baguette::Log.debug "IPC::Event::ExtraSocket: #{event.fd}"
|
||||
|
||||
# 1. accept new websocket clients
|
||||
if server.fd == event.fd
|
||||
client = server.accept
|
||||
begin
|
||||
websocket_client_connection client
|
||||
Baguette::Log.info "new client: #{client.fd}"
|
||||
rescue e
|
||||
Baguette::Log.error "Exception: #{e}"
|
||||
client.close
|
||||
end
|
||||
next
|
||||
end
|
||||
handle_new_clients(service, server)
|
||||
|
||||
# 2. active fd != server fd
|
||||
activefd = event.fd
|
||||
if activefd <= 0
|
||||
Baguette::Log.error "faulty activefd: #{activefd}"
|
||||
end
|
||||
websocket_switching_procedure activefd
|
||||
|
||||
when IPC::Event::Switch
|
||||
Baguette::Log.debug "IPC::Event::Switch: fd #{event.fd}"
|
||||
# raise "Not implemented."
|
||||
Baguette::Log.debug "IPC::Event::Switch: from fd #{event.fd}"
|
||||
raise "Not implemented."
|
||||
|
||||
# IPC::Event::Message has to be the last entry
|
||||
# because ExtraSocket and Switch inherit from Message class
|
||||
when IPC::Event::MessageSent
|
||||
Baguette::Log.debug "IPC::Event::MessageSent: fd #{event.fd}"
|
||||
Baguette::Log.error "IPC::Event::MessageSent: #{event.fd}"
|
||||
|
||||
when IPC::Event::MessageReceived
|
||||
Baguette::Log.debug "IPC::Event::Message: fd #{event.fd}"
|
||||
|
||||
Baguette::Log.debug "IPC::Event::MessageReceived: #{event.fd}"
|
||||
raise "Not implemented."
|
||||
end
|
||||
rescue e
|
||||
Baguette::Log.error "IPC loop final catch: #{e}"
|
||||
end
|
||||
end
|
||||
|
||||
main
|
||||
|
|
|
|||
Loading…
Reference in New Issue