如何telnet一个地址？

Posted 2021-05-03

我正在尝试理解套接字类，我正在使用以下示例来实现服务器示例

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 IP [" ..ip.. "] and port [" .. port .. "]")
print("After connecting, you have 10s to enter a line to be echoed")

-- loop forever waiting for clients
while true 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

但现在的问题是，我如何telnet例如地址localhost：8080通过lua？

编辑：我忘了告诉他什么，我甚至不能在cmd上telnet。当我输入命令时：

telnet ip port

发送消息后，它总是说“连接丢失”。我究竟做错了什么？

答案

首先，按照here中的说明在Windows 7中启用telnet：

1. 转到“控制面板”
2. 在Turn Windows features on or off下找到Programs（取决于布局）
3. 找到Telnet client并启用它。

一旦你完成了它，它应该按预期工作。

另一答案

完成！

local socket = require("socket")

local server = socket.connect(ip, port)

local ok, err = server:send("RETURN\n")
if (err ~= nil) then
    print (err)
else
    while true do
        s, status, partial = server:receive(1024)
        print(s or partial)

        if (status == "closed") then
            break
        end
    end
end

server:close()