lessons period 2

period_2/02-sockets/903/SocketUtil.py

@@ -0,0 +1,41 @@
+import socket
+import pickle
+import select
+
+BUFFER_SIZE = 1024
+
+def newServerSocket(ip_addr, port):
+    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    server_socket.bind((ip_addr, port))
+    server_socket.listen()
+    return server_socket
+
+
+def recvObj(socket):
+    inputs, outputs, errs = select.select([socket], [], [socket], 6)
+    if socket in inputs:
+        connected_socket, addr = socket.accept()
+        all_data = b''
+        while True:
+            data = connected_socket.recv(BUFFER_SIZE)
+            if not data:
+                break
+            all_data = all_data + data
+        return pickle.loads(all_data)
+    return None
+
+
+def sendObj(ip_addr, blk, port):
+    soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    soc.connect((ip_addr, port))
+    data = pickle.dumps(blk)
+    soc.send(data)
+    soc.close()
+    return False
+
+
+
+
+# changes on newServerConnection 
+# We modified it to accept port number as a parameter, such that when 
+# we make a server we can specify on which port bind it