Switch to BSON for data serialization.

1 files changed, 64 insertions, 0 deletions

diff --git a/libmproxy/contrib/bson/network.py b/libmproxy/contrib/bson/network.py
new file mode 100644
index 00000000..f9a90d48
--- /dev/null
+++ b/libmproxy/contrib/bson/network.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python
+
+import socket
+try:
+	from cStringIO import StringIO
+except ImportError, e:
+	from StringIO import StringIO
+from struct import unpack
+from __init__ import dumps, loads
+
+def _bintoint(data):
+	return unpack("<i", data)[0]
+
+def _sendobj(self, obj):
+	"""
+	Atomically send a BSON message.
+	"""
+	data = dumps(obj)
+	self.sendall(data)
+
+def _recvobj(self):
+	"""
+	Atomic read of a BSON message.
+
+	This function either returns a dict, None, or raises a socket error.
+
+	If the return value is None, it means the socket is closed by the other side.
+	"""
+	sock_buf = self.recvbytes(4)
+	if sock_buf is None:
+		return None
+
+	message_length = _bintoint(sock_buf.getvalue())
+	sock_buf = self.recvbytes(message_length - 4, sock_buf)
+	if sock_buf is None:
+		return None
+
+	retval = loads(sock_buf.getvalue())
+	return retval
+
+
+def _recvbytes(self, bytes_needed, sock_buf = None):
+	"""
+	Atomic read of bytes_needed bytes.
+
+	This function either returns exactly the nmber of bytes requested in a
+	StringIO buffer, None, or raises a socket error.
+
+	If the return value is None, it means the socket is closed by the other side.
+	"""
+	if sock_buf is None:
+		sock_buf = StringIO()
+	bytes_count = 0
+	while bytes_count < bytes_needed:
+		chunk = self.recv(min(bytes_needed - bytes_count, 32768))
+		part_count = len(chunk)
+
+		if part_count < 1:
+			return None
+
+		bytes_count += part_count
+		sock_buf.write(chunk)
+	
+	return sock_buf