2
繼LuaSocket
Introduction我設法讓服務器運行。我也設法從客戶端連接。不過,我注意到,服務器腳本凍結,直到server:accept()
獲得連接。
研究
LuaSocket
Reference規定:
使用的setTimeout方法或接受可能被阻塞,直到另一個客戶端顯示出來。
這甚至包括在示例代碼中。但是,在local client = server:accept()
之後調用client:settimeout(10)
,因此腳本在達到此點之前會被阻止。
我讀過這可以通過多線程解決,但這似乎是一個誇大。
問題
- 你如何導致服務器腳本停止等待連接,繼續前進?
- 如何防範
client:receive()
(服務器端)和tcp:receive()
(客戶端)(或client:settimeout(10)
負責)類似的問題?
代碼
服務器(從LuaSocket
Introduction)
-- 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
客戶端(如下this answer)
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()