[Python] The remote host breaks the connection

I want to make my proxy server on VDS, set up a proxy on my computer, and write a script on the most remote server to process and forward requests. At the stage of forwarding requests to the site (like google.com or youtube.com ) errors occur, if you run the program on a local computer (127.0.0.0:65432) , you will get the error [WinError 10054] , but if you run it on VDS, you will get the error [Errno 104] Connection reset by peer . However, in both cases, a response with an error of 400 is received from the end resources.

Proxy:



VPS:



Local:



Here's my code, I've changed it many times (because I'm just starting out and I make a lot of mistakes, but I can't handle this one)

import socket
import sys
import threading


HOST = "127.0.0.1" # Standard loopback interface address (localhost)
PORT = 65432 # Port to listen on (non-privileged ports are > 1023)
BUFFER_SIZE = 10000


def main():
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((HOST, PORT))
s.listen(10)
print(f"Подняли сервер на порту: {PORT}")

while True:
try:
conn, addr = s.accept()
d = threading.Thread(target=conn_string, args=(conn, addr))
d.setDaemon(True)
d.start()
except Exception as e:
print(e)
sys.exit(1)
s.close()


def conn_string(conn, addr):
try:
data = conn.recv(BUFFER_SIZE)
#print(f"Connection: {conn}")
server = data.decode("utf-8")
first_line = server.split('\n')[0]
url = first_line.split(" ")[1]
http_pos = url.find("://")
if http_pos==-1:
temp=url
else:
temp = url[(http_pos+3):]
port_pos = temp.find(":")
webserver_pos = temp.find("/")
if webserver_pos == -1:
webserver_pos = len(temp)

webserver =""
port = -1
if (port_pos == -1 or webserver_pos < port_pos):
port = 80
webserver = temp[:webserver_pos]
else:
port = int((temp[(port_pos+1):])[:webserver_pos-port_pos-1])
webserver = temp[ort_pos]
decode_data = decode(data)
#print(f"Address: {addr}")
#print(f"Data: {data}")
#print(f"Webserver: {webserver}")
proxy_server(webserver, port, conn, addr, decode_data)
except Exception as e:
print(e)
conn.close()
sys.exit(2)


def decode(data):
return bytes(data)


def get_vpn():
return ("127.0.0.1", 12345)


def proxy_server(url, host_port, conn, addr, decode_data):
print(url, host_port)
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.settimeout(60.0)
client.connect((url, int(host_port)))
client.send(decode_data)
while True:
response = client.recv(BUFFER_SIZE)
print(response.decode('utf-8'))
if len(response.decode('utf-8')) > 0:
conn.send(response)
dar = float(len(response))
dar = float(dar/1024)
dar = f"{dar} KB"
print(f"[*] Requests Done: {addr[0]} => {dar} <=")
else:
break
print(f"Закрыл соединение с {url}")
client.close()
conn.close()


main()

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