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publish/skynet/lualib/snax/gateserver.lua 3.24 KB
4d6f285d   zhouhaihai   增加发布功能
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  local skynet = require "skynet"
  local netpack = require "skynet.netpack"
  local socketdriver = require "skynet.socketdriver"
  
  local gateserver = {}
  
  local socket	-- listen socket
  local queue		-- message queue
  local maxclient	-- max client
  local client_number = 0
  local CMD = setmetatable({}, { __gc = function() netpack.clear(queue) end })
  local nodelay = false
  
  local connection = {}
  
  function gateserver.openclient(fd)
  	if connection[fd] then
  		socketdriver.start(fd)
  	end
  end
  
  function gateserver.closeclient(fd)
  	local c = connection[fd]
  	if c then
  		connection[fd] = false
  		socketdriver.close(fd)
  	end
  end
  
  function gateserver.start(handler)
  	assert(handler.message)
  	assert(handler.connect)
  
  	function CMD.open( source, conf )
  		assert(not socket)
  		local address = conf.address or "0.0.0.0"
  		local port = assert(conf.port)
  		maxclient = conf.maxclient or 1024
  		nodelay = conf.nodelay
  		skynet.error(string.format("Listen on %s:%d", address, port))
  		socket = socketdriver.listen(address, port)
  		socketdriver.start(socket)
  		if handler.open then
  			return handler.open(source, conf)
  		end
  	end
  
  	function CMD.close()
  		assert(socket)
  		socketdriver.close(socket)
  	end
  
  	local MSG = {}
  
  	local function dispatch_msg(fd, msg, sz)
  		if connection[fd] then
  			handler.message(fd, msg, sz)
  		else
  			skynet.error(string.format("Drop message from fd (%d) : %s", fd, netpack.tostring(msg,sz)))
  		end
  	end
  
  	MSG.data = dispatch_msg
  
  	local function dispatch_queue()
  		local fd, msg, sz = netpack.pop(queue)
  		if fd then
  			-- may dispatch even the handler.message blocked
  			-- If the handler.message never block, the queue should be empty, so only fork once and then exit.
  			skynet.fork(dispatch_queue)
  			dispatch_msg(fd, msg, sz)
  
  			for fd, msg, sz in netpack.pop, queue do
  				dispatch_msg(fd, msg, sz)
  			end
  		end
  	end
  
  	MSG.more = dispatch_queue
  
  	function MSG.open(fd, msg)
  		if client_number >= maxclient then
  			socketdriver.close(fd)
  			return
  		end
  		if nodelay then
  			socketdriver.nodelay(fd)
  		end
  		connection[fd] = true
  		client_number = client_number + 1
  		handler.connect(fd, msg)
  	end
  
  	local function close_fd(fd)
  		local c = connection[fd]
  		if c ~= nil then
  			connection[fd] = nil
  			client_number = client_number - 1
  		end
  	end
  
  	function MSG.close(fd)
  		if fd ~= socket then
  			if handler.disconnect then
  				handler.disconnect(fd)
  			end
  			close_fd(fd)
  		else
  			socket = nil
  		end
  	end
  
  	function MSG.error(fd, msg)
  		if fd == socket then
  			socketdriver.close(fd)
  			skynet.error("gateserver close listen socket, accpet error:",msg)
  		else
  			if handler.error then
  				handler.error(fd, msg)
  			end
  			close_fd(fd)
  		end
  	end
  
  	function MSG.warning(fd, size)
  		if handler.warning then
  			handler.warning(fd, size)
  		end
  	end
  
  	skynet.register_protocol {
  		name = "socket",
  		id = skynet.PTYPE_SOCKET,	-- PTYPE_SOCKET = 6
  		unpack = function ( msg, sz )
  			return netpack.filter( queue, msg, sz)
  		end,
  		dispatch = function (_, _, q, type, ...)
  			queue = q
  			if type then
  				MSG[type](...)
  			end
  		end
  	}
  
  	skynet.start(function()
  		skynet.dispatch("lua", function (_, address, cmd, ...)
  			local f = CMD[cmd]
  			if f then
  				skynet.ret(skynet.pack(f(address, ...)))
  			else
  				skynet.ret(skynet.pack(handler.command(cmd, address, ...)))
  			end
  		end)
  	end)
  end
  
  return gateserver