Prekinitev izvajanja kode po določenem času (#287)

Dodan timeout pri preverjanju nalog

Author: k3ap

web/problems/templates/python/attempt.py

@@ -209,7 +209,9 @@ def update_attempts(old_parts, response):
         ] = "{{ token }}"
         try:
             {{ part.validation|default:"pass"|indent:"            "|safe }}
-        except:
+        except TimeoutError:
+            Check.error("Dovoljen čas izvajanja presežen")
+        except Exception:
             Check.error(
                 "Testi sprožijo izjemo\n  {0}",
                 "\n  ".join(traceback.format_exc().split("\n"))[:-2],

web/problems/templates/python/check.py

@@ -14,6 +14,10 @@ def readline(self, size=None):
         return line
 
 
+class TimeoutError(Exception):
+    pass
+
+
 class Check:
     parts = None
     current_part = None
@@ -394,3 +398,21 @@ def set_stringio(stringio):
         else:
             with Check.set(stringio=stringio):
                 yield
+
+    @staticmethod
+    @contextmanager
+    def time_limit(timeout_seconds=1):
+        from signal import SIGINT, raise_signal
+        from threading import Timer
+
+        def interrupt_main():
+            raise_signal(SIGINT)
+
+        timer = Timer(timeout_seconds, interrupt_main)
+        timer.start()
+        try:
+            yield
+        except KeyboardInterrupt:
+            raise TimeoutError
+        finally:
+            timer.cancel()