Tiny GarrysMod coroutine functions

cofetch.lua

function cofetch(url, headers)
    local co = coroutine.running()
    assert(co)

    -- ensure we wait at least one tick
    timer.Simple(0, function()
        http.Fetch(url, function(body, size, headers, code)
            coroutine.resume(co, body, size, headers, code)
        end, function(err)
            coroutine.resume(false, err)
        end, headers)
    end)

    return coroutine.yield()
end

cosleep.lua

function cosleep(secs)
    local co = coroutine.running()
    assert(co)

    timer.Simple(secs, function()
        coroutine.resume(co)
    end)

    coroutine.yield()
end