add readme and driver

dump_msg.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python2
+# -*- coding: UTF-8 -*-
+# File: dump_msg.py
+# Date: Fri Nov 21 14:36:23 2014 +0800
+# Author: Yuxin Wu <[email protected]>
+
+from lib.Parser import WeChatDBParser
+
+import sys, os
+
+if len(sys.argv) != 3:
+    sys.exit("Usage: {0} <path to decoded_database.db> <output_dir>".format(sys.argv[0]))
+
+db_file = sys.argv[1]
+output_dir = sys.argv[2]
+try:
+    os.mkdir(output_dir)
+except:
+    pass
+if not os.path.isdir(output_dir):
+    sys.exit("Error creating directory {}".format(output_dir))
+
+parser = WeChatDBParser(db_file)
+parser.parse()
+
+for name, msgs in parser.msgs_by_talker.iteritems():
+    print u"Writing msgs for {}".format(name)
+    with open(os.path.join(output_dir, name + '.txt'), 'w') as f:
+        for m in msgs:
+            print >> f, m