Lua Socket Lib Question

I am writing an app taking a开发者_开发知识库dvantage of Lua Socket lib. Here is a simple code snippet that describes my problem.

local com=require("socket");
local socket=com.tcp();
local hello="hi stack overflow";
local myIP="192.168.1.1";
local myPort = 2000;
local err = nil;

-- Main
while 1
if(~err) then
err = socket:send(hello);
else
  if(socket:connect("myIP", myPort))) then
  err = 1;
  end -- second if
end -- first if
waitfor(10); -- wait for 10 sec.
do

(I actually didn't run this particular code but it is identical to the running code in my problem). When I see that if socket is closed, this code cannot reopen it. I would have guessed once we grab the master TCP object we can open and close as we please.

I can force this code to work by repeating the socket.tcp() call however I suspect that leaves the previous object somewhere in memory and I want to avoid this.

Well, things that are wrong in your code (starting from the top)

• It's a bad habbit reusing default module names like socket, it'll confuse people reading your code
• While loop syntax is while <condition> do <statements> end
• setting err to nil is useless in this case, as it does not exist in the snippet scope
• it makes no sense to send to an unconnected master.
• negation is done with not instead of ~
• you pass the string "myIP" instead of the actual IP

then there's also a function socket.sleep() you might be interested in.

I'm wondering why you complicate the loop this way, and don't just use something like:

require("socket");
local soc=socket.tcp();
local hello="hi stack overflow";
local myIP="192.168.1.1";
local myPort = 2000;



local stat,err=socket:connect(myIP, myPort)
if not stat then
   error(err)
else
    -- Main
    while not err do
        err = socket:send(hello)
        socket.sleep(10)
    end
end

The connect call will never work as you are passing the string "myIP" not the variable myIP which contains your target Ip address.