initiler commit

initialer commit eines servers, der ein bit aus einem socket liest

server-clear.py

@@ -0,0 +1,75 @@
+#!/usr/bin/python3
+
+# file: server-clear.py
+# date: 26.07.2019
+# email: berhsi@web.de
+
+# server, who listen for connections for localhost, port 64000 and ipv4.
+
+import socket
+from time import time, ctime
+from sys import exit
+
+
+def connection_handle(conn):
+
+    data = conn.recv(1).decode()
+    if data == '0' or data == '1':
+        if update_status(data) == True:
+            conn.send(data.encode())
+        else:
+            conn.send(b'3')
+    else:
+        print('Invalid argument')
+        return False
+    return True
+
+
+def update_status(data):
+
+    try:
+        print('Update status ...')
+        if data == '0':
+            status = 'false'
+        else:
+            status = 'true'
+        lastchange = str(time()).split('.')[0]
+        print('Change status: {}: {}'.format(lastchange, status))
+    except Exception as e:
+        print('Error: {}'.format(e))
+        return False
+    return True
+
+
+def main():
+
+    HOST = '127.0.0.1'
+    PORT = 64000
+    
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as mySocket:
+        print('Socket created')
+        try:
+            mySocket.bind((HOST, PORT))
+            mySocket.listen()
+            print('Listen on {} at Port {}'.format(HOST, PORT))
+        except Exception as e:
+            print('Error: unable to bind and listen')
+            print('Error: {}'.format(e))
+        while True:
+            conn = None
+            try:
+                conn, addr = mySocket.accept()
+                print('Connection from {}:{}'.format(addr[0], addr[1]))
+                connection_handle(conn)
+            except KeyboardInterrupt:
+                print('\b\bExit')
+                exit()
+            except Exception as e:
+                print('Error: {}'.format(e))
+            finally:
+                if conn:
+                    conn.close()
+
+
+if __name__ == '__main__':
+    main()