LuaSocket - COPAS - CoSocket

[jm_list@...]

I have been trying to use COPAS to do asynchronous HTTP requests. I keep
getting the "attempt to yield across metamethod/C-call boundary" error
even after I converted my pcalls to calls etc.

function	DoAsyncRequest(request)
	local	t = {};
	local	wrapper = copas.wrap;
	local	tcpsocket = socket.tcp;

	local	requestTable = {
	        url = request,
        	sink = ltn12.sink.table(t),
        	create = copas.cosocket.tcp
        	 };

	local code, headers, status = socket.skip(1,
socket.http.request(requestTable));

    return table.concat(t), code, headers, status;
end

myUrl = "http://ws.bonware.com/eps/e/lastWeather";;

function TestURL()
	print("Trying to get URL");
	print(DoAsyncRequest(myUrl));
	print("Done");
end

copas.addthread(TestURL);
copas.loop();

I didn't have any problems with coroutines when I implemented a simple
scheduler/coroutine thread system.

Since COPAS is a part of Kepler/Xavante, I assume it must be working for
someone.

All I really need is a way to do (mostly) non-blocking HTTP, so I may end
up abandoning COPAS and socket.http and implementing something simpler
using socket.tcp with zero timeouts.

For a language as beautifully designed as Lua, the limitations on
coroutines seem very vague and constricting.

-- 
 Juri Munkki