combine projects

1 files changed, 52 insertions, 0 deletions

diff --git a/mitmproxy/stateobject.py b/mitmproxy/stateobject.py
new file mode 100644
index 00000000..a4a1ffda
--- /dev/null
+++ b/mitmproxy/stateobject.py
@@ -0,0 +1,52 @@
+from __future__ import absolute_import
+from netlib.utils import Serializable
+
+
+class StateObject(Serializable):
+
+    """
+    An object with serializable state.
+
+    State attributes can either be serializable types(str, tuple, bool, ...)
+    or StateObject instances themselves.
+    """
+
+    _stateobject_attributes = None
+    """
+    An attribute-name -> class-or-type dict containing all attributes that
+    should be serialized. If the attribute is a class, it must implement the
+    Serializable protocol.
+    """
+
+    def get_state(self):
+        """
+        Retrieve object state.
+        """
+        state = {}
+        for attr, cls in self._stateobject_attributes.iteritems():
+            val = getattr(self, attr)
+            if hasattr(val, "get_state"):
+                state[attr] = val.get_state()
+            else:
+                state[attr] = val
+        return state
+
+    def set_state(self, state):
+        """
+        Load object state from data returned by a get_state call.
+        """
+        state = state.copy()
+        for attr, cls in self._stateobject_attributes.iteritems():
+            if state.get(attr) is None:
+                setattr(self, attr, state.pop(attr))
+            else:
+                curr = getattr(self, attr)
+                if hasattr(curr, "set_state"):
+                    curr.set_state(state.pop(attr))
+                elif hasattr(cls, "from_state"):
+                    obj = cls.from_state(state.pop(attr))
+                    setattr(self, attr, obj)
+                else:  # primitive types such as int, str, ...
+                    setattr(self, attr, cls(state.pop(attr)))
+        if state:
+            raise RuntimeWarning("Unexpected State in __setstate__: {}".format(state))