[Qemu-devel] [PATCH v3 17/17] QMP: Add support for buffer class to qmp python helper

[Jan Kiszka <jan.kiszka@web.de>]

From: Jan Kiszka <jan.kiszka@siemens.com>

This demonstrates the conversion of QMP buffer objects and does some
minimalistic pretty-printing.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 QMP/qmp.py |   25 +++++++++++++++++++++++--
 1 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/QMP/qmp.py b/QMP/qmp.py
index 4062f84..4650918 100644
--- a/QMP/qmp.py
+++ b/QMP/qmp.py
@@ -8,7 +8,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 
-import socket, json
+import socket, json, binascii
 
 class QMPError(Exception):
     pass
@@ -16,6 +16,18 @@ class QMPError(Exception):
 class QMPConnectError(QMPError):
     pass
 
+class QMPBuffer:
+    def __init__(self, data):
+        self.data = binascii.a2b_base64(data)
+
+    def __repr__(self):
+        str = ''
+        for i in range(0, len(self.data)):
+            if i > 0:
+                str += ' '
+            str += binascii.b2a_hex(self.data[i])
+        return str
+
 class QEMUMonitorProtocol:
     def connect(self):
         self.sock.connect(self.filename)
@@ -61,10 +73,19 @@ class QEMUMonitorProtocol:
         # the Server won't read our input
         self.sock.send(json.dumps(cmd) + ' ')
 
+    def __json_obj_hook(self, dct):
+        if '__class__' in dct:
+            if dct['__class__'] == 'buffer':
+                return QMPBuffer(dct['data'])
+            else:
+                return
+        return dct
+
     def __json_read(self):
         try:
             while True:
-                line = json.loads(self.sockfile.readline())
+                line = json.loads(self.sockfile.readline(),
+                                  object_hook=self.__json_obj_hook)
                 if not 'event' in line:
                     return line
         except ValueError:
-- 
1.6.0.2