Add a log handler for external python modules

lib/msf/core/modules/external/python/metasploit/module.py

@@ -1,8 +1,43 @@
 import json
+import logging
 import os
 import sys
 
 
+class LogFormatter(logging.Formatter):
+    def __init__(self, prefix, *args, **kwargs):
+        super(LogFormatter, self).__init__(*args, **kwargs)
+        self.prefix = prefix
+
+    def format(self, record):
+        return self.prefix + record.msg
+
+
+class LogHandler(logging.Handler):
+    def emit(self, record):
+        level = 'debug'
+        if record.levelno >= logging.ERROR:
+            level = 'error'
+        elif record.levelno >= logging.WARNING:
+            level = 'warning'
+        elif record.levelno >= logging.INFO:
+            level = 'info'
+        log(self.format(record), level)
+        return
+
+    @classmethod
+    def setup(cls, level=logging.DEBUG, name=None, msg_prefix=None):
+        logger = logging.getLogger(name)
+        handler = cls()
+
+        if level is not None:
+            logger.setLevel(level)
+        if msg_prefix is not None:
+            handler.setFormatter(LogFormatter(msg_prefix))
+        logger.addHandler(handler)
+        return handler
+
+
 def log(message, level='info'):
     rpc_send({'jsonrpc': '2.0', 'method': 'message', 'params': {
         'level': level,