lua socket client

Question

I am trying to make a simple lua socket client for the Socket Server example, from the Lua Socket page.

The server part works though, I tried it with telnet.

But the client part isn't working.

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

tcp:connect(host, port);
tcp:send("hello world");

It is only supposed to connect to it, send some data and receive some in return.

Can someone help me fix it?

Atop

Answer 1

Your server is likely receiving per line. As noted in the receive docs, this is the default receiving pattern. Try adding a newline to your client message. This completes the receive on the server:

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()

Gader

Alternatively, use a different receive pattern, e.g. local threebytes = tcp:receive(3). – Nainsook