从事cocos2dx也有好几年了,从开始的懵懂到现在（不知道如何评价自己，至少能把游戏做出来） 中途磕磕碰碰 想分享下tcp socket在lua中的使用 首先还是引入socket库和定义class和状态码 参考了quick的simple tcp 使用方法

	local gameSocket = LuaTcpSocket:new():init()
	local function onConnectStatus( code, msg )

<span class="k">end</span>
<span class="n">gameSocket</span><span class="p">:</span><span class="n">setConnectCallback</span><span class="p">(</span><span class="n">onConnectStatus</span><span class="p">)</span>
<span class="n">gameSocket</span><span class="p">:</span><span class="n">connect</span><span class="p">(</span><span class="n">ip</span><span class="p">,</span><span class="n">port</span><span class="p">)</span>

下面贴代码

local scheduler = cc.Director:getInstance():getScheduler()

local socket = require "socket"


local SOCKET_CONNECT_FAIL_TIMEOUT = 3	– socket failure timeout


local LuaTcpSocket = class("LuaTcpSocket")


local NET_STATUS = {

unconnected = 1,

connected = 2,

lostConnection = 3,

}


–初始化

function LuaTcpSocket:init()

self.socket = nil

self.session = 0

self.tickScheduler = nil

self.status = NET_STATUS.unconnected

self.lastContent = ""

return self

end

– 判断ipv6 苹果强烈要求

function LuaTcpSocket:isIpv6( host )

local result = socket.dns.getaddrinfo(host)

local ipv6 = false

if result then

for k,v in pairs(result) do

if v.family == "inet6" then

ipv6 = true

break

end

end

end

return ipv6

end


– 连接服务区,ip可以是域名,ipv6环境

function LuaTcpSocket:connect( ip, port )

local v6 = self:isIpv6(ip)

self.lastIp = ip

self.lastPort = port


<span class="k">if</span> <span class="n">v6</span> <span class="k">then</span>
	<span class="n">self</span><span class="p">.</span><span class="n">socket</span> <span class="o">=</span> <span class="n">socket</span><span class="p">.</span><span class="n">tcp6</span><span class="p">()</span>
<span class="k">else</span>
	<span class="n">self</span><span class="p">.</span><span class="n">socket</span> <span class="o">=</span> <span class="n">socket</span><span class="p">.</span><span class="n">tcp</span><span class="p">()</span>
<span class="k">end</span>
<span class="n">self</span><span class="p">.</span><span class="n">socket</span><span class="p">:</span><span class="n">settimeout</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="c1">--异步模式</span>

<span class="n">self</span><span class="p">:</span><span class="n">checkConnect</span><span class="p">()</span>



end


function LuaTcpSocket:realConnect()

local succ, status = self.socket:connect(self.lastIp, self.lastPort)

– print("LuaTcpSocket.realConnect:", succ, status)

return succ  1 or status  STATUS_ALREADY_CONNECTED

end


function LuaTcpSocket:checkConnect()

self:stopConnectScheduler()

self.waitConnect = 0


<span class="n">self</span><span class="p">.</span><span class="n">connectTimeTickScheduler</span> <span class="o">=</span> <span class="n">scheduler</span><span class="p">:</span><span class="n">scheduleScriptFunc</span><span class="p">(</span><span class="k">function</span> <span class="p">(</span> <span class="n">dt</span> <span class="p">)</span>
	<span class="n">self</span><span class="p">.</span><span class="n">waitConnect</span> <span class="o">=</span> <span class="n">self</span><span class="p">.</span><span class="n">waitConnect</span> <span class="o">+</span> <span class="n">dt</span>
	<span class="k">if</span> <span class="n">self</span><span class="p">.</span><span class="n">waitConnect</span> <span class="o">&gt;=</span> <span class="n">SOCKET_CONNECT_FAIL_TIMEOUT</span> <span class="k">then</span>
		<span class="n">self</span><span class="p">.</span><span class="n">waitConnect</span> <span class="o">=</span> <span class="mi">0</span>
		<span class="n">self</span><span class="p">:</span><span class="n">close</span><span class="p">()</span>
		<span class="n">self</span><span class="p">:</span><span class="n">onConnectFail</span><span class="p">()</span>
		<span class="k">return</span>
	<span class="k">end</span>
	<span class="k">if</span> <span class="n">self</span><span class="p">:</span><span class="n">realConnect</span><span class="p">()</span> <span class="k">then</span>
		<span class="n">self</span><span class="p">:</span><span class="n">stopConnectScheduler</span><span class="p">()</span>
		<span class="n">self</span><span class="p">:</span><span class="n">onConnected</span><span class="p">()</span>
	<span class="k">end</span>
<span class="k">end</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span><span class="kc">false</span><span class="p">)</span>



end


function LuaTcpSocket:stopConnectScheduler()

if self.connectTimeTickScheduler then

scheduler:unscheduleScriptEntry(self.connectTimeTickScheduler)

end

self.connectTimeTickScheduler = nil

end


function LuaTcpSocket:close()

self:disconnect(NET_STATUS.unconnected)

end


function LuaTcpSocket:isConnected()

return self.status == NET_STATUS.connected

end


function LuaTcpSocket:onConnectFail()

if self.connectCallback ~= nil then

self.connectCallback(-1,"time out")

end

end


function LuaTcpSocket:onConnected()

self.status = NET_STATUS.connected

self:tick()

if self.connectCallback ~= nil then

self.connectCallback(0,"sucess")

end

end


function LuaTcpSocket:setConnectCallback( connectCallback )

self.connectCallback = connectCallback

end


function LuaTcpSocket:tick()

self.tickScheduler = scheduler:scheduleScriptFunc(function ( dt )

if self.status == NET_STATUS.connected then

local chunck, status, partial = self.socket:receive("*a")

– print("chunck",type(chunck),chunck) --nil	nil

– print("status",type(status),status)  --string	timeout

– print("partial",type(status),partial) --string  len=0


		<span class="k">if</span> <span class="n">status</span> <span class="ow">and</span> <span class="n">status</span> <span class="o">~=</span> <span class="s2">&#34;timeout&#34;</span> <span class="k">then</span>
			<span class="nb">print</span><span class="p">(</span><span class="s2">&#34;net status&#34;</span><span class="p">,</span><span class="n">status</span><span class="p">)</span>
			<span class="nb">print</span><span class="p">(</span><span class="s2">&#34;chunck&#34;</span><span class="p">,</span><span class="n">chunck</span><span class="p">)</span>
			<span class="nb">print</span><span class="p">(</span><span class="s2">&#34;partial&#34;</span><span class="p">,</span><span class="n">partial</span><span class="p">)</span>
			<span class="n">self</span><span class="p">:</span><span class="n">disconnect</span><span class="p">(</span><span class="n">NET_STATUS</span><span class="p">.</span><span class="n">lostConnection</span><span class="p">)</span>
			<span class="k">return</span>
		<span class="k">end</span>

		<span class="k">if</span> <span class="p">(</span> <span class="n">chunck</span> <span class="ow">and</span> <span class="o">#</span><span class="n">chunck</span> <span class="o">==</span> <span class="mi">0</span> <span class="p">)</span> <span class="ow">or</span> <span class="p">(</span> <span class="n">partial</span> <span class="ow">and</span> <span class="o">#</span><span class="n">partial</span> <span class="o">==</span> <span class="mi">0</span> <span class="p">)</span> <span class="k">then</span>
			<span class="c1">-- print(&#34;no data return 111&#34;)</span>
			<span class="k">return</span>
		<span class="k">end</span>

		<span class="k">if</span> <span class="n">partial</span> <span class="ow">and</span> <span class="o">#</span><span class="n">partial</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="k">then</span>
			<span class="n">self</span><span class="p">.</span><span class="n">lastContent</span> <span class="o">=</span> <span class="n">self</span><span class="p">.</span><span class="n">lastContent</span> <span class="o">..</span> <span class="n">partial</span>
		<span class="k">elseif</span> <span class="n">chunck</span> <span class="ow">and</span> <span class="o">#</span><span class="n">chunck</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="k">then</span>
			<span class="n">self</span><span class="p">.</span><span class="n">lastContent</span> <span class="o">=</span> <span class="n">self</span><span class="p">.</span><span class="n">lastContent</span> <span class="o">..</span> <span class="n">chunck</span>
		<span class="k">end</span>
		

		<span class="kd">local</span> <span class="n">flag</span><span class="p">,</span> <span class="n">remain</span><span class="p">,</span> <span class="n">err</span> <span class="o">=</span> <span class="n">self</span><span class="p">:</span><span class="n">unpackage</span><span class="p">(</span><span class="n">self</span><span class="p">.</span><span class="n">lastContent</span><span class="p">)</span>
		<span class="c1">-- print(&#34;flag,remain,err&#34;,flag,remain,err)</span>
		<span class="k">if</span> <span class="n">flag</span> <span class="k">then</span>
			<span class="n">self</span><span class="p">.</span><span class="n">lastContent</span> <span class="o">=</span> <span class="s2">&#34;&#34;</span>
		<span class="k">else</span>
			<span class="k">if</span> <span class="n">err</span> <span class="o">~=</span> <span class="kc">nil</span> <span class="k">then</span>
				<span class="nb">print</span><span class="p">(</span><span class="s2">&#34;why happen????&#34;</span><span class="p">,</span><span class="n">err</span><span class="p">)</span>
				<span class="n">self</span><span class="p">:</span><span class="n">disconnect</span><span class="p">(</span><span class="n">NET_STATUS</span><span class="p">.</span><span class="n">lostConnection</span><span class="p">)</span>
				<span class="k">return</span>
			<span class="k">end</span>
			<span class="n">self</span><span class="p">.</span><span class="n">lastContent</span> <span class="o">=</span> <span class="n">remain</span>
		<span class="k">end</span>
	
	<span class="k">else</span>
		<span class="c1">-- print(&#34;error tick&#34;,self.status)</span>
	<span class="k">end</span>

<span class="k">end</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span><span class="kc">false</span><span class="p">)</span>



end


– return sucess, content, err

– 这里用自己的字节流实现包的解压缩,需要注意半包,多包

function LuaTcpSocket:unpackage( content )

end


– 发生数据,也是用字节流

function LuaTcpSocket:send( data )

if not self:isConnected() then

self:disconnect(NET_STATUS.lostConnection)

return

end


<span class="kd">local</span> <span class="n">i</span><span class="p">,</span> <span class="n">err</span> <span class="o">=</span> <span class="n">self</span><span class="p">.</span><span class="n">socket</span><span class="p">:</span><span class="n">send</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="c1">-- print(&#34;send,i err&#34;,i,err)</span>

<span class="k">if</span> <span class="n">err</span> <span class="k">then</span>
	<span class="k">if</span> <span class="n">err</span> <span class="o">==</span> <span class="s2">&#34;closed&#34;</span> <span class="k">then</span>
		<span class="n">self</span><span class="p">:</span><span class="n">disconnect</span><span class="p">(</span><span class="n">NET_STATUS</span><span class="p">.</span><span class="n">lostConnection</span><span class="p">)</span>
	<span class="k">end</span>
<span class="k">end</span>



end


function LuaTcpSocket:disconnect( status )

self.status = status

if self.socket then

self.socket:close()

end

self.socket = nil

self.lastContent = ""

self:stopTickScheduler()

self:stopConnectScheduler()

end


function LuaTcpSocket:stopTickScheduler()

if self.tickScheduler ~= nil then

scheduler:unscheduleScriptEntry(self.tickScheduler)

end

self.tickScheduler = nil

end


function LuaTcpSocket:reconnect()

return self:connect(self.lastIp,self.lastPort)

end