Lua服务器与客户端实例

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

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服务器，main.lua

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local socket = require ( "socket" )

local tcpServer = nil

--创建指定端口的tcp server
local function createTCPServer( port )

    -- Create Socket
    local tcpServerSocket , err = socket.tcp()
    local backlog = 5

    -- Check Socket
    if tcpServerSocket == nil then
        return nil , err
    end

    -- Allow Address Reuse
    tcpServerSocket:setoption( "reuseaddr" , true )

    -- Bind Socket
    local res, err = tcpServerSocket:bind( "*" , port )
    if res == nil then
        return nil , err
    end

    -- Check Connection
    res , err = tcpServerSocket:listen( backlog )
    if res == nil then
        return nil , err
    end

    -- Return Server
    return tcpServerSocket

end

--接受来自客户端的连接，并保存在tcpClient
local tcpClient = nil
local function acceptClient()
    tcpServer:settimeout( 0 )
    clientIn , _ = tcpServer:accept()
    if clientIn then
        tcpClient = clientIn
    end
end

--接收已连接的客户端（tcpClient）数据
local function receiveLoop()
    if tcpClient ~= nil then
        local tcpClientMessage , _ = tcpClient:receive('*l')

        if ( tcpClientMessage ~= nil ) then
            print(tcpClientMessage)
            tcpClient:send( "back:" .. tcpClientMessage .. "\n")
        end
    end
end

local function main()
    tcpServer , _ = createTCPServer( 8080 )
    if tcpServer then
        Runtime:addEventListener( "enterFrame" , acceptClient )
        Runtime:addEventListener( "enterFrame" , receiveLoop )
    end
end

main()

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客户端程序，main.lua

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local ui = require("ui")
local socket = require("socket")
local tcpClient = nil

--接收来自服务器的数据
local function receiveData()
if tcpClient then
tcpClient:settimeout(0)
local msg = tcpClient:receive("*l")
if msg then
print(msg)
end
end
end

--向服务器发送数据
local index = 0
local function btnListener(event)
index = index + 1
if tcpClient then
tcpClient:send("pack index:" .. index .. ".\n")
end
end

--初始化
local function main()
local btn = ui.newButton{
default = "buttonBlue.png",
over = "buttonBlueOver.png",
onRelease = btnListener,
id = "btn"
}
btn:setReferencePoint(display.TopLeftReferencePoint)
btn.x = 10
btn.y = 100

--创建tcp连接
tcpClient = socket.tcp()
if tcpClient then
local ret = tcpClient:connect("192.168.1.2", 8080)
if ret then
tcpClient:send("hi, server, i'm client.\n")
Runtime:addEventListener("enterFrame", receiveData)
end
end
end

main()

lua socket相关文档参见：http://w3.impa.br/~diego/software/luasocket/tcp.html