Add StreamError stanza and a stream_error event.

Note that the stream may automatically attempt to
reconnect when a stream error is received.

sleekxmpp/stanza/__init__.py

@@ -8,6 +8,7 @@
 
 
 from sleekxmpp.stanza.error import Error
+from sleekxmpp.stanza.stream_error import StreamError
 from sleekxmpp.stanza.iq import Iq
 from sleekxmpp.stanza.message import Message
 from sleekxmpp.stanza.presence import Presence

sleekxmpp/stanza/iq.py

@@ -224,4 +224,3 @@ class Iq(RootStanza):
         else:
             StanzaBase._set_stanza_values(self, values)
         return self
-

sleekxmpp/stanza/stream_error.py

@@ -0,0 +1,59 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+from sleekxmpp.stanza.error import Error
+from sleekxmpp.xmlstream import ElementBase, ET, register_stanza_plugin
+
+
+class StreamError(Error):
+
+    """
+    XMPP stanzas of type 'error' should include an <error> stanza that
+    describes the nature of the error and how it should be handled.
+
+    Use the 'XEP-0086: Error Condition Mappings' plugin to include error
+    codes used in older XMPP versions.
+
+    The stream:error stanza is used to provide more information for
+    error that occur with the underlying XML stream itself, and not
+    a particular stanza.
+
+    Note: The StreamError stanza is the same as the normal Error stanza,
+          but with a different namespace.
+
+    Example error stanza:
+        <error type="cancel" code="404">
+          <item-not-found xmlns="urn:ietf:params:xml:ns:xmpp-stanzas" />
+          <text xmlns="urn:ietf:params:xml:ns:xmpp-stanzas">
+            The item was not found.
+          </text>
+        </error>
+
+    Stanza Interface:
+        code      -- The error code used in older XMPP versions.
+        condition -- The name of the condition element.
+        text      -- Human readable description of the error.
+        type      -- Error type indicating how the error should be handled.
+
+    Attributes:
+        conditions   -- The set of allowable error condition elements.
+        condition_ns -- The namespace for the condition element.
+        types        -- A set of values indicating how the error
+                        should be treated.
+
+    Methods:
+        setup         -- Overrides ElementBase.setup.
+        get_condition -- Retrieve the name of the condition element.
+        set_condition -- Add a condition element.
+        del_condition -- Remove the condition element.
+        get_text      -- Retrieve the contents of the <text> element.
+        set_text      -- Set the contents of the <text> element.
+        del_text      -- Remove the <text> element.
+    """
+
+    namespace = 'http://etherx.jabber.org/streams'