未找到指定的 WinError2 文件 (Python 3.9)

Question

我对 python 了解不多，我需要制作一个 UDP P2P 文件共享应用程序/代码。 以前从未使用过 python 所以请原谅我缺乏知识。 我需要帮助来解决此错误：

    `FileNotFoundError: [WinError 2] The system cannot find the file specified`
   

这是我的 server.py 代码：

import os
import socket
import time

host = input("Host Name: ")
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)


try:
    sock.connect((host, 22222))
    print("Connected Successfully")
except:
    print("Unable to connect")
    exit(0)


file_name = sock.recv(100).decode()
file_size = sock.recv(100).decode()


with open("./rec/" + file_name, "wb") as file:
    c = 0
  
    start_time = time.time()

    
    while c <= int(file_size):
        data = sock.recv(1024)
        if not (data):
            break
        file.write(data)
        c += len(data)

   
    end_time = time.time()

print("File transfer Complete. Total time: ", end_time - start_time)


sock.close()

此代码由多个网站和 github 组成，如果您看到任何复制，请见谅。

客户端.py：

import os
import socket
import time


sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind((socket.gethostname(), 22222))
sock.listen(5)
print("Host Name: ", sock.getsockname())


client, addr = sock.accept()


file_name = input("File Name:")
file_size = os.path.getsize(file_name)


client.send(file_name.encode())
client.send(str(file_size).encode())


with open(file_name, "rb") as file:
    c = 0
   
    start_time = time.time()

   
    while c <= file_size:
        data = file.read(1024)
        if not (data):
            break
        client.sendall(data)
        c += len(data)

    
    end_time = time.time()

print("File Transfer Complete. Total time: ", end_time - start_time)

sock.close()


      ```

Answer 1

您遇到的错误消息是由于找不到文件。 最有可能是报告错误的client.py文件。 在尝试打开它之前，您应该检查文件是否存在。

file_name = input("File Name: ")
# Ensure the file exists
if not os.path.isfile(file_name):
    print(f"File not found: {file_name}")
    exit(0)

由于您从不同来源复制和粘贴，代码中存在许多错误。 下面的代码应该适合你，我添加了注释来解释它是如何工作的。

如果有什么需要进一步解释的，请在评论中告诉我。

服务器.py ：

import os
import socket
import time

SERVER_HOST = "0.0.0.0"
SERVER_PORT = 22222
BUFFER_SIZE = 1024 # Receive 1024 bytes at a time (1kb)
SEPARATOR = ":::::"

SERVER_FOLDER = "./rec/" # Location to save file

# Create the server socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Bind the socket to the host address and port
sock.bind((SERVER_HOST, SERVER_PORT))

# Enable server to accept connections
sock.listen()
print(f"Server listening {SERVER_HOST}:{SERVER_PORT}")

# Accept client connection
client_socket, address = sock.accept()
print(f"Client {address} connected.")

# Receive the file information
received = client_socket.recv(BUFFER_SIZE).decode()

# Split the string using the separator
file_name, file_size = received.split(SEPARATOR)

print(f"File name: '{file_name}'")
print(f"File size: '{file_size}'")

# Set the path where the file is to be saved
save_path = os.path.join(SERVER_FOLDER, file_name)

with open(save_path, "wb") as file:
    bytes_received = 0
    start_time = time.time()
    while True:
        data = client_socket.recv(BUFFER_SIZE)
        if not (data):
            break
        file.write(data)
        bytes_received += len(data)
    end_time = time.time()

print(f"File transfer Complete. {bytes_received} of {file_size} received. Total time: {end_time - start_time}")

# Close the client socket
client_socket.close()

# Close the server socket
sock.close()

客户端.py ：

import os
import socket
import time

SERVER_PORT = 22222
BUFFER_SIZE = 1024 # Send 1024 bytes at a time (1kb)
SEPARATOR = ":::::"

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host = socket.gethostname()

print(f"Connecting to {host}:{SERVER_PORT}")
sock.connect((host, SERVER_PORT))
print("Connected.")

file_name = input("File Name: ")

# Ensure the file exists
if not os.path.isfile(file_name):
    print(f"File not found: {file_name}")
    exit(0)

# Get the file size
file_size = os.path.getsize(file_name)

# Send file_name and file_size as a single string
sock.send(f"{file_name}{SEPARATOR}{file_size}".encode())

with open(file_name, "rb") as file:
    c = 0
    start_time = time.time()
    while c <= file_size:
        data = file.read(BUFFER_SIZE)
        if not (data):
            break
        sock.sendall(data)
        c += len(data)
    end_time = time.time()

print("File Transfer Complete. Total time: ", end_time - start_time)

sock.close()