因此,如果有一个客户端和服务器具有各自的动态 IPv4 地址,并且两者都通过 2 个单独的路由器连接到互联网,那么如何让客户端和服务器使用其动态 IPv4 地址和路由器的静态 IPv4 相互连接Python 3 中的地址。
一般来说,我对网络非常陌生,因此如果有其他标准方法可以执行此操作,请在下面建议更好的方法。
我目前有客户端和服务器端的代码。
Client:
import socket
import tqdm
import os
SEPARATOR = "<SEPARATOR>"
BUFFER_SIZE = 4096 # send 4096 bytes each time step
# the ip address or hostname of the server, the receiver
host = "192.168.1.21"
# the port, let's use 5001
port = 20
# the name of file we want to send, make sure it exists
filename = ""
# get the file size
filesize = os.path.getsize(filename)
# create the client socket
s = socket.socket()
print(f"[+] Connecting to {host}:{port}")
s.connect((host, port))
print("[+] Connected.")
# send the filename and filesize
s.send(f"{filename}{SEPARATOR}{filesize}".encode())
# start sending the file
progress = tqdm.tqdm(range(filesize), f"Sending {filename}", unit="B", unit_scale=True, unit_divisor=1024)
with open(filename, "rb") as f:
while True:
# read the bytes from the file
bytes_read = f.read(BUFFER_SIZE)
if not bytes_read:
# file transmitting is done
break
# we use sendall to assure transimission in
# busy networks
s.sendall(bytes_read)
# update the progress bar
progress.update(len(bytes_read))
# close the socket
s.close()
Server:
import socket
import tqdm
import os
from pathlib import Path
# device's IP address
SERVER_HOST = "0.0.0.0"
SERVER_PORT = 5001
# receive 4096 bytes each time
BUFFER_SIZE = 4096
SEPARATOR = "<SEPARATOR>"
# create the server socket
# TCP socket
s = socket.socket()
# bind the socket to our local address
s.bind((SERVER_HOST, SERVER_PORT))
# enabling our server to accept connections
# 5 here is the number of unaccepted connections that
# the system will allow before refusing new connections
s.listen(5)
print(f"[*] Listening as {SERVER_HOST}:{SERVER_PORT}")
# accept connection if there is any
client_socket, address = s.accept()
# if below code is executed, that means the sender is connected
print(f"[+] {address} is connected.")
# receive the file infos
# receive using client socket, not server socket
received = client_socket.recv(BUFFER_SIZE).decode()
filename, filesize = received.split(SEPARATOR)
# remove absolute path if there is
filename = os.path.basename(filename)
# convert to integer
filesize = int(filesize)
# start receiving the file from the socket
# and writing to the file stream
progress = tqdm.tqdm(range(filesize), f"Receiving {filename}", unit="B", unit_scale=True, unit_divisor=1024)
home = str(Path.home())
with open(f"{home}/Downloads/{filename}", "wb") as f:
while True:
# read 1024 bytes from the socket (receive)
bytes_read = client_socket.recv(BUFFER_SIZE)
if not bytes_read:
# nothing is received
# file transmitting is done
break
# write to the file the bytes we just received
f.write(bytes_read)
# update the progress bar
progress.update(len(bytes_read))
# close the client socket
client_socket.close()
# close the server socket
s.close()
注意:上面的客户端和服务器代码不是我写的。它是从另一个网站复制并轻轻修改的。
网站链接:https://www.thepythoncode.com/article/send-receive-files-using-sockets-python https://www.thepythoncode.com/article/send-receive-files-using-sockets-python