tmp

books/python_black/proxy.py

@@ -26,12 +26,116 @@ def hexdump(src, length=16, show=True):
         return results
 
 
+def receive_from(connection):
+    buffer = b''
+    connection.settimeout(5)
+    try:
+        while True:
+            data = connection.recv(4096)
+            if not data:
+                break
+            buffer += data
+    except Exception as e:
+        pass
+    return buffer
+
+
+def request_handler(buffer):
+    return buffer
+
+
+def response_handler(buffer):
+    return buffer
+
+
+def proxy_handler(client_socket, remote_host, remote_port, receive_first):
+    remote_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    remote_socket.connect((remote_host, remote_port))
+
+    if receive_first:
+        remote_buffer = receive_from(remote_socket)
+        hexdump(remote_buffer)
+
+    remote_buffer = response_handler(remote_buffer)
+    if len(remote_buffer):
+        print("[<==] Sending %d bytes to localhost." % len(remote_buffer))
+        client_socket.send(remote_buffer)
+
+    while True:
+        local_buffer = receive_from(client_socket)
+        if len(local_buffer):
+            line = "[==>] Received %d bytes from localhost." % len(local_buffer)
+            print(line)
+            hexdump(local_buffer)
+
+            local_buffer = request_handler(local_buffer)
+            remote_socket.send(local_buffer)
+            print("[==>] Send to remote.")
+
+        remote_buffer = receive_from(remote_socket)
+        if len(remote_buffer):
+            print("[<==] Received %d bytes from remote." % len(remote_buffer))
+            hexdump(remote_buffer)
+
+            remote_buffer = response_handler(remote_buffer)
+            client_socket.send(remote_buffer)
+            print("[<==] Sent to localhost")
+
+        if not len(local_buffer) or not len(remote_buffer):
+            client_socket.close()
+            remote_socket.close()
+            print("[*] No more data. Closing connections")
+            break
+
+
+def server_loop(local_host, local_port, remote_host, remote_port, receive_first):
+    '''Настройка и управление соединением'''
+    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    try:
+        server.bind((local_host, local_port))
+    except Exception as e:
+        print('problem on bind: %r' % e)
+        print("[!!] Failed to listen on %s:%d" % (local_host, local_port))
+        print("[!!] Check for other listening sockets or connect permissions.")
+        sys.exit(0)
+
+    print("[*] Listening on %s:%d" % (local_host, local_port))
+    server.listen(5)
+    while True:
+        client_socket, addr = server.accept()
+        # выводим информацию о локальном соединении
+        line = "> Received incoming connection from %s:%d" % (addr[0], addr[1])
+        print(line)
+        # создаем поток для взаимодействия с удаленным сервером
+        proxy_thread = threading.Thread(
+            target=proxy_handler,
+            args=(client_socket, remote_host, remote_port, receive_first))
+        proxy_thread.start()
+
+
 
 
 def main():
-    # print(HEX_FILTER)
-    hexdump('python rocks\n and prixies roll\n', length=8)
+    if len(sys.argv[1:]) != 5:
+        print("Usage: ./proxy.py [localhost] [localport]", end='')
+        print("[remotehost] [remoteport] [receive_first]")
+        print("Example: ./proxy.py 127.0.0.1 9000 8.8.8.8 9000 True")
+        sys.exit(0)
+        
+    local_host = sys.argv[1]
+    local_port = int(sys.argv[2])
+    remote_host = sys.argv[3]
+    remote_port = int(sys.argv[4])
+    receive_first = sys.argv[5]
+
+    if "True" in receive_first:
+        receive_first = True
+    else:
+        receive_first = False
+
+    server_loop(local_host, local_port, remote_host, remote_port, receive_first)
 
 
+    
 if __name__ == '__main__':
     main()