Initial data commit

Task/Distributed-programming/Python/distributed-programming-6.py

@@ -0,0 +1,55 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+import socket
+import pickle
+
+HOST = "localhost"
+PORT = 8000
+
+class RPCClient(object):
+    def __init__(self, host, port):
+        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.socket.connect((host, port))
+        self.rfile = self.socket.makefile('rb')
+        self.wfile = self.socket.makefile('wb')
+        self.in_channel = pickle.Unpickler(self.rfile)
+        self.out_channel = pickle.Pickler(self.wfile, protocol=2)
+
+    def _close(self):
+        self.socket.close()
+        self.rfile.close()
+        self.wfile.close()
+
+    # Make calling remote methods easy by overriding attribute access.
+    # Accessing any attribute on our instances will give a proxy method that
+    # calls the method with the same name on the remote machine.
+    def __getattr__(self, name):
+        def proxy(*args, **kwargs):
+            self.out_channel.dump((name, args, kwargs))
+            self.wfile.flush() # to make sure the server won't wait forever
+            status, result = self.in_channel.load()
+            if status == 'OK':
+                return result
+            else:
+                raise result
+
+        return proxy
+
+if __name__ == '__main__':
+    # connect to server and send data
+    rpcclient = RPCClient(HOST, PORT)
+
+    print 'Testing the echo() method:'
+    print rpcclient.echo('Hello world!')
+    print
+    print 'Calculating 42/2 on the remote machine:'
+    print rpcclient.div(42, 2)
+    print
+    print 'is_computer_on on the remote machine returns:'
+    print rpcclient.is_computer_on()
+    print
+    print 'Testing keyword args:'
+    print '42/2 is:', rpcclient.div(divisor=2, dividend=42)
+    rpcclient._close()
+    del rpcclient