Initial data commit

Task/Distributed-programming/Python/distributed-programming-5.py

@@ -0,0 +1,57 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+import SocketServer
+import pickle
+
+HOST = "localhost"
+PORT = 8000
+
+class RPCServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
+    # The object_to_proxy member should be set to the object we want
+    # methods called on. Unfortunately, we can't do this in the constructor
+    # because the constructor should not be overridden in TCPServer...
+
+    daemon_threads = True
+
+class RPCHandler(SocketServer.StreamRequestHandler):
+    def handle(self):
+        in_channel = pickle.Unpickler(self.rfile)
+        out_channel = pickle.Pickler(self.wfile, protocol=2)
+        while True:
+            try:
+                name, args, kwargs = in_channel.load()
+                print 'got %s %s %s' % (name, args, kwargs)
+            except EOFError:
+                # EOF means we're done with this request.
+                # Catching this exception to detect EOF is a bit hackish,
+                # but will work for a quick demo like this
+                break
+            try:
+                method = getattr(self.server.object_to_proxy, name)
+                result = method(*args, **kwargs)
+            except Exception, e:
+                out_channel.dump(('Error',e))
+            else:
+                out_channel.dump(('OK',result))
+
+class MyHandlerInstance(object):
+    def echo(self, data):
+        '''Method for returning data got from client'''
+        return 'Server responded: %s' % data
+
+    def div(self, dividend, divisor):
+        '''Method to divide 2 numbers'''
+        return dividend/divisor
+
+    def is_computer_on(self):
+        return True
+
+if __name__ == '__main__':
+    rpcserver = RPCServer((HOST, PORT), RPCHandler)
+    rpcserver.object_to_proxy = MyHandlerInstance()
+    try:
+        rpcserver.serve_forever()
+    except KeyboardInterrupt:
+        print 'Exiting...'
+        rpcserver.server_close()