1 files changed, 22 insertions, 3 deletions
diff --git a/libmproxy/exceptions.py b/libmproxy/exceptions.py
index f34d9707..0e11c136 100644
--- a/libmproxy/exceptions.py
+++ b/libmproxy/exceptions.py
@@ -1,23 +1,42 @@
+"""
+We try to be very hygienic regarding the exceptions we throw:
+Every Exception mitmproxy raises shall be a subclass of ProxyException.
+
+
+See also: http://lucumr.pocoo.org/2014/10/16/on-error-handling/
+"""
 from __future__ import (absolute_import, print_function, division)
 
 
 class ProxyException(Exception):
     """
     Base class for all exceptions thrown by libmproxy.
+
+    Args:
+        message: the error message
+        cause: (optional) an error object that caused this exception, e.g. an IOError.
     """
-    def __init__(self, message, cause=None):
+    def __init__(self, message):
         """
         :param message: Error Message
-        :param cause: Exception object that caused this exception to be thrown.
         """
         super(ProxyException, self).__init__(message)
-        self.cause = cause
 
 
 class ProtocolException(ProxyException):
     pass
 
 
+class TlsException(ProtocolException):
+    pass
+
+
+class ClientHandshakeException(TlsException):
+    def __init__(self, message, server):
+        super(ClientHandshakeException, self).__init__(message)
+        self.server = server
+
+
 class Socks5Exception(ProtocolException):
     pass