lua - 使用bind()创建带有Lua Socket的服务器

Question

与 LuaSocket 合作，此代码有效:

local socket = require'socket'
local server = socket.bind('*',51423)
local client = server:accept()

但是这段代码失败了:

local socket = require 'socket'
local server = socket.tcp()
server:bind('*',51423)
local client = server:accept()    
--> lua: /tmp/server.lua:4: calling 'accept' on bad self (tcp{server} expected, got userdata)

但是 TCP bind 的文档暗示后者应该有效，并指出:

"Note: The function socket.bind is available and is a shortcut for the creation of server sockets."

如何将通用“主”对象转换为服务器？

<小时/>

这样做的动机是希望在绑定(bind)操作本身上添加超时:

local socket = require'socket'
local server = socket.tcp()
server:settimeout(2/1000) -- Only wait 2ms when attempting to bind
server:bind('*',51423)

Answer 1

答案位于同一文档页面的顶部(哎呀):

"A master object can be transformed into a server … with the method listen (after a call to bind)"

看起来s = socket.bind(…)实际上相当于:

s = socket.tcp()
s:bind(…)
s:listen(32)

我不确定为什么它们被分成两个函数，但修改代码以添加 listen() 会使其工作:

local socket = require 'socket'
local server = socket.tcp()
server:bind('*',51423)
server:listen(32)
local client = server:accept()