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2026-09-01 10:12:31 +08:00
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+"""CardConnectionObserver interface.
+
+CardConnectionObserver is a base class for objects that are to be notified
+upon CardConnection events.
+
+__author__ = "https://www.gemalto.com/"
+
+Copyright 2001-2012 gemalto
+Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com
+
+This file is part of pyscard.
+
+pyscard is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+pyscard is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with pyscard; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+"""
+
+from smartcard.Observer import Observer
+from smartcard.util import toHexString
+
+# pylint: disable=too-few-public-methods
+
+
+# ReaderObserver interface
+class CardConnectionObserver(Observer):
+    """
+    CardConnectionObserver is a base class for objects that are to be notified
+    upon L{CardConnection} events.
+    """
+
+    def update(self, observable, handlers):
+        """Called upon CardConnection event.
+
+        @param observable:         the observed card connection object
+        @param handlers:    the CardConnectionEvent sent by the connection
+        """
+
+
+class ConsoleCardConnectionObserver(CardConnectionObserver):
+    """CardConnectionObserver output to the console"""
+
+    def update(self, observable, handlers):
+
+        if "connect" == handlers.type:
+            print("connecting to " + observable.getReader())
+
+        elif "reconnect" == handlers.type:
+            print("reconnecting to " + observable.getReader())
+
+        elif "disconnect" == handlers.type:
+            print("disconnecting from " + observable.getReader())
+
+        elif "release" == handlers.type:
+            print("release from " + observable.getReader())
+
+        elif "command" == handlers.type:
+            print("> " + toHexString(handlers.args[0]))
+
+        elif "response" == handlers.type:
+            sw1, sw2 = handlers.args[-2:]
+            SW = f" {sw1:2X} {sw2:02X}"
+            if [] == handlers.args[0]:
+                print("<  []" + SW)
+            else:
+                print("< " + toHexString(handlers.args[0]) + SW)
+        else:
+            print("unknown event:", handlers.type)