Merge branch 'yowsup-2' into develop

bot.py

@@ -45,7 +45,7 @@ class Bot():
 		args = message.strip().split(" ")
 		cmd = args.pop(0)
 
-		if cmd[0] == '\\':
+		if len(cmd) > 0 and cmd[0] == '\\':
 			try:
 				self.call(cmd[1:], args)
 			except KeyError:

contrib/spectrum@.service

@@ -0,0 +1,11 @@
+[Unit]
+description=spectrum2 whatsapp
+After=network.target
+
+[Service]
+ExecStart=/usr/bin/spectrum2 --no-daemonize -j whatsapp.example.com --config /etc/spectrum2/transports/whatsapp.cfg
+Restart=always
+User=spectrum2
+
+[Install]
+WantedBy=multi-user.target

yowsupwrapper.py

@@ -55,6 +55,25 @@ from functools import partial
 
 #from session import MsgIDs
 
+# Temporarily work around yowsup padding bugs with new protocol
+class UpdatedYowAxolotlLayer(YowAxolotlLayer):
+	def decodeInt7bit(self, string):
+		idx = 0
+		while ord(string[idx]) >= 128:
+			idx += 1
+		consumedBytes = idx + 1
+		value = 0
+		while idx >= 0:
+			value <<= 7
+			value += ord(string[idx]) % 128
+			idx -= 1
+		return value, consumedBytes
+
+	def unpadV2Plaintext(self, v2plaintext):
+		end = -ord(v2plaintext[-1]) # length of the left padding
+		length,consumed = self.decodeInt7bit(v2plaintext[1:])
+		return v2plaintext[1+consumed:end]
+
 # Temporary env until yowsup updates
 class UpdatedS40YowsupEnv(env.S40YowsupEnv):
 	_VERSION = "2.13.39"
@@ -85,7 +104,7 @@ class YowsupApp(object):
 					YowProfilesProtocolLayer,
 					YowGroupsProtocolLayer,
 					YowPresenceProtocolLayer)),
-				YowAxolotlLayer,
+				UpdatedYowAxolotlLayer,
 				YowCoderLayer,
 				YowCryptLayer,
 				YowStanzaRegulator,