socket.on:recieve sometimes not working

[Hellsy22]

I have my own http-client lua library. It's working well with a dev96 Aug 2015 firmware.
But with fresh firmware (tried both master and dev) I got strange bug - event "receive" never happens in module, but working if I send commands one by one with LuaLoader. Same if I tried to send all commands in one string.

One string. No output

sk=net.createConnection(net.TCP, 0); sk:on("receive", function(sck, c) print(c) end); sk:connect(80, "192.168.0.1"); sk:send("GET /192.168.0.1.lua HTTP/1.1\r\nHost: esp\r\nConnection: close\r\nAccept: */*\r\n\r\n")

Function. No output

function justatest()
   sk=net.createConnection(net.TCP, 0);
   sk:on("receive", function(sck, c) print(c) end);
   sk:connect(80, "192.168.0.1");
   sk:send("GET /192.168.0.1.lua HTTP/1.1\r\nHost: esp\r\nConnection: close\r\nAccept: */*\r\n\r\n")
end
justatest()

Two strings with 1 sec pause. Page printed

sk=net.createConnection(net.TCP, 0); sk:on("receive", function(sck, c) print(c) end); sk:connect(80, "192.168.0.1")
sk:send("GET /192.168.0.1.lua HTTP/1.1\r\nHost: esp\r\nConnection: close\r\nAccept: */*\r\n\r\n")

I tried to use "connection" event and it happend, but nothing changes.
I tried to delay script execution by tmr.alarm(...), it not helped.

[TerryE]

You have to do the sk:send() in an sk:on('connection', callback_fn) with SDKs after V1.0 otherwise you will attempt to do the send before you are connected. Socket I/O is async to this executing thread.

But this issue falls under #719