LuaSocket 服务器:accept() 超时 (TCP)

Sie*_*ski 5 lua luasocket

问题

LuaSocket 介绍之后,我设法让服务器运行。我还设法从客户端连接。但是,我注意到服务器脚本会冻结,直到server:accept()获得连接。

研究

LuaSocket 参考指定:

使用 settimeout 方法或 accept 可能会阻塞,直到另一个客户端出现。

这甚至包含在示例代码中。但是,client:settimeout(10)在之后调用,local client = server:accept()因此脚本在到达此点之前被阻止。

我读到这可以通过多线程解决,但这似乎有点夸张。

问题

  1. 您如何使服务器脚本停止等待连接并继续前进?
  2. 我如何防止client:receive()(服务器端)和tcp:receive()(客户端)出现类似问题(或client:settimeout(10)处理这些问题)?

代码

服务器(来自LuaSocket 介绍

-- load namespace
local socket = require("socket")
-- create a TCP socket and bind it to the local host, at any port
local server = assert(socket.bind("*", 0))
-- find out which port the OS chose for us
local ip, port = server:getsockname()
-- print a message informing what's up
print("Please telnet to localhost on port " .. port)
print("After connecting, you have 10s to enter a line to be echoed")
-- loop forever waiting for clients
while 1 do
  -- wait for a connection from any client
  local client = server:accept()
  -- make sure we don't block waiting for this client's line
  client:settimeout(10)
  -- receive the line
  local line, err = client:receive()
  -- if there was no error, send it back to the client
  if not err then client:send(line .. "\n") end
  -- done with client, close the object
  client:close()
end
Run Code Online (Sandbox Code Playgroud)

客户(按照这个答案

local host, port = "127.0.0.1", 100
local socket = require("socket")
local tcp = assert(socket.tcp())

tcp:connect(host, port);
--note the newline below
tcp:send("hello world\n");

while true do
    local s, status, partial = tcp:receive()
    print(s or partial)
    if status == "closed" then break end
end
tcp:close()
Run Code Online (Sandbox Code Playgroud)

Pau*_*nko 4

您应该能够在调用之前使用server:timeout()server:accept()

server:settimeout(2)
local client, err = server:accept()
print(client, err)
Run Code Online (Sandbox Code Playgroud)

nil timeout如果 2 秒内没有收到请求,则会打印此信息。