Update httpc.request (#1822)

lualib/http/httpc.lua

@@ -114,6 +114,8 @@ function httpc.request(method, hostname, url, recvheader, header, content)
 	close_interface(interface, fd)
 	if ok then
 		return statuscode, body
+	elseif statuscode == 200 then
+		error(body)
 	else
 		error(statuscode)
 	end