[英]How to send file in python over network without loosing data?
我正在尝试使用 Python 中的 2 个文件,一个名为server.py
的文件通过我的网络发送包含'hello world'
这个词的文件data.txt
:
import socket
import tqdm
import os
# 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)
with open(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))
progress.close()
# close the client socket
client_socket.close()
# close the server socket
s.close()
另一个叫client.py
:
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 = "192.168.1.12"
# the port, let's use 5001
port = 5001
# the name of file we want to send, make sure it exists
filename = "data.txt"
# 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()
这是我尝试过的:
我一遍又一遍地检查代码是否有任何错误。 问题是尽管文件在发送之前包含一个字符串,但接收到的文件是 0 字节的空文件。
我该如何解决这个问题,任何帮助或建议将不胜感激。
似乎您在同一目录中运行服务器和客户端,并且服务器在客户端读取文件之前截断了文件。
它适用于我的 hello world 但如果你想发送二进制文件也许你可以尝试 base 64
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