diff --git a/src/networkers.py b/src/networkers.py
--- a/src/networkers.py
+++ b/src/networkers.py
@@ -7,14 +7,16 @@ class NetworkReader:
 
 	def readMsg(self):
 		data=self.stream.readline()
-		if not data: pass # !! raise something
+		assert data
 		jsonLength=int(data.split(b":")[1].strip()) # "json-length: length" -> length
 		data=self.stream.readline()
-		if not data: pass # !! raise something
+		assert data
 		binLength=int(data.split(b":")[1].strip()) # "bin-length: length" -> length
 		jsonData=self.stream.read(jsonLength)
+		assert len(jsonData)==jsonLength
 		jsonData=json.loads(str(jsonData,encoding="utf-8"))
 		binData=self.stream.read(binLength)
+		assert len(binData)==binLength
 		
 		return (jsonData,binData)
 		
@@ -31,4 +33,5 @@ class NetworkWriter:
 		jsonData=bytes(json.dumps(jsonData)+"\n",encoding="utf-8")
 		jsonLength=bytes("json-length: "+str(len(jsonData))+"\n",encoding="utf-8")
 		binLength=bytes("bin-length: "+str(len(binData))+"\n",encoding="utf-8")
+
 		return b"".join((jsonLength,binLength,jsonData,binData))