Add example for python sockets

Medium_articles/README.md

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+# Medium Examples
+
+This directory holds any code and snippet that I have published in Medium:
+
+
+* [Learn Networking with Python’s Socket and Threading Module 🚀](https://medium.com/python-for-the-utopian/learning-networking-with-pythons-socket-and-threading-module-30dc77e1fc59).

Medium_articles/python_sockets/first_example.py

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+import socket
+
+HOST = 'www.github.com'
+PORT = 80
+client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+client.connect((HOST, PORT))

Medium_articles/python_sockets/netcat_example.py

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+import socket
+
+PORT = 12345
+HOSTNAME = '54.209.5.48'
+
+
+def netcat(text_to_send):
+   s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+   s.connect((HOSTNAME, PORT))
+   s.sendall(text_to_send)
+   s.shutdown(socket.SHUT_WR)
+   rec_data = []
+   
+   while 1:
+      data = s.recv(1024)
+      if not data:
+         break
+      rec_data.append(data)
+   s.close()
+   return rec_data
+
+   
+if __name__ == '__main__':
+   text_to_send = ''
+   text_recved = netcat( text_to_send)
+   print(text_recved[1])

Medium_articles/python_sockets/second_example.py

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+DATA = 'GET / HTTP/1.1\r\nHost: google.com\r\n\r\n'
+
+def tcp_client():
+   client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+   client.connect((HOST, PORT))
+   client.send(DATA)
+   response = client.recv(4096)
+   print(response)
+   
+if __name__ == '__main__':
+   tcp_client()

Medium_articles/python_sockets/tcp_server.py

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+import socket
+import threading
+
+
+BIND_IP = '0.0.0.0'
+BIND_PORT = 9090
+
+
+def handle_client(client_socket):
+   request = client_socket.recv(1024)
+ 
+   print(f'[*] Received: {request}')
+ 
+   client_socket.send('ACK')
+   client_socket.close()
+
+def tcp_server():
+   
+   server = socket.socket( socket.AF_INET, socket.SOCK_STREAM)
+   server.bind(( BIND_IP, BIND_PORT))
+   server.listen(5)
+ 
+   print(f'[*] Listening on {BIND_IP}, {BIND_PORT}')
+   while 1:
+       client, addr = server.accept()
+       print(f'[*] Accepted connection: {addr[0]}:{addr[1]}')
+      
+       client_handler = threading.Thread(target=handle_client, args=    (client,))
+       client_handler.start()
+
+       
+if __name__ == '__main__':
+    tcp_server()

Medium_articles/python_sockets/udp_client.py

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+import socket
+
+HOST = '127.0.0.1'
+PORT = 9000
+DATA = 'AAAAAAAAAA'
+
+def udp_client():
+   
+   client = socket.socket( socket.AF_INET, socket.SOCK_DGRAM)
+   client.sendto(DATA, ( HOST, PORT ))
+   data, addr = client.recvfrom(4096)
+   print(data, adr)
+
+   
+if __name__ == '__main__':
+   udp_client()

Medium_articles/python_sockets/udp_server.py

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+import socket
+
+BIND_IP = '0.0.0.0'
+BIND_PORT = 9000
+
+def udp_server():
+  
+   server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+   server.bind(( BIND_IP, BIND_PORT))
+ 
+   print(f'Waiting on port: {str(BIND_PORT)}')
+   while 1:
+       data, addr = server.recvfrom(1024)
+       print(data)
+
+
+if __name__ == '__main__':
+    udp_server()