发送者：
send_file.py
def send_file(filename: str = "mytext.txt", testing: bool = False) -> None:
import socket
port = 12312 # Reserve a port for your service.
sock = socket.socket() # Create a socket object
host = socket.gethostname() # Get local machine name
sock.bind((host, port)) # Bind to the port
sock.listen(5) # Now wait for client connection.
print("Server listening....")
while True:
conn, addr = sock.accept() # Establish connection with client.
print(f"Got connection from {addr}")
data = conn.recv(1024)
print(f"Server received: {data }")
with open(filename, "rb") as in_file:
data = in_file.read(1024)
while data:
conn.send(data)
print(f"Sent {data!r}")
data = in_file.read(1024)
print("Done sending")
conn.close()
if testing: # Allow the test to complete
break
sock.shutdown(1)
sock.close()
if __name__ == "__main__":
send_file()
启动python文件：
出现：
servering listening
received_file.py
if __name__ == "__main__":
import socket # Import socket module
sock = socket.socket() # Create a socket object
host = socket.gethostname() # Get local machine name
port = 12312
sock.connect((host, port))
sock.send(b"Hello server!")
with open("Received_file", "wb") as out_file:
print("File opened")
print("Receiving data...")
while True:
data = sock.recv(1024)
print(f"{data }")
if not data:
break
out_file.write(data) # Write data to a file
print("Successfully got the file")
sock.close()
print("Connection closed")
接收者这边也启动received_file:
另外同时send_file也收到：
文件结构如下：
参考：
# 服务器端
import socket
import os
import hashlib
server = socket.socket()
server.bind(("localhost", 6969)) # 绑定监听端口
server.listen(5) # 监听
print("监听开始..")
while True:
conn, addr = server.accept() # 等待连接
print("conn:", conn, "\naddr:", addr) # conn连接实例
while True:
data = conn.recv(1024) # 接收
if not data: # 客户端已断开
print("客户端断开连接")
break
print("收到的命令：", data.decode("utf-8"))
cmd, filename = data.decode("utf-8").split(" ")
if cmd =="get":
if os.path.isfile(filename): # 判断文件存在
# 1.先发送文件大小，让客户端准备接收
size = os.stat(filename).st_size #获取文件大小
conn.send(str(size).encode("utf-8")) # 发送数据长度
print("发送的大小：", size)
# 2.发送文件内容
conn.recv(1024) # 接收确认
m = hashlib.md5()
f = open(filename, "rb")
for line in f:
conn.send(line) # 发送数据
m.update(line)
f.close()
# 3.发送md5值进行校验
md5 = m.hexdigest()
conn.send(md5.encode("utf-8")) # 发送md5值
print("md5:", md5)
server.close()
# 客户端
import socket
import os
import hashlib
client = socket.socket() # 生成socket连接对象
ip_port =("localhost", 6969) # 地址和端口号
client.connect(ip_port) # 连接
print("服务器已连接")
while True:
content = input(">>")
if len(content)==0: continue # 如果传入空字符会阻塞
if content.startswith("get"):
client.send(content.encode("utf-8")) # 传送和接收都是bytes类型
# 1.先接收长度，建议8192
server_response = client.recv(1024)
file_size = int(server_response.decode("utf-8"))
print("接收到的大小：", file_size)
# 2.接收文件内容
client.send("准备好接收".encode("utf-8")) # 接收确认
filename = "new" + content.split(" ")[1]
f = open(filename, "wb")
received_size = 0
m = hashlib.md5()
while received_size < file_size:
size = 0 # 准确接收数据大小，解决粘包
if file_size - received_size > 1024: # 多次接收
size = 1024
else: # 最后一次接收完毕
size = file_size - received_size
data = client.recv(size) # 多次接收内容，接收大数据
data_len = len(data)
received_size += data_len
print("已接收：", int(received_size/file_size*100), "%")
m.update(data)
f.write(data)
f.close()
print("实际接收的大小:", received_size) # 解码
# 3.md5值校验
md5_sever = client.recv(1024).decode("utf-8")
md5_client = m.hexdigest()
print("服务器发来的md5:", md5_sever)
print("接收文件的md5:", md5_client)
if md5_sever == md5_client:
print("MD5值校验成功")
else:
print("MD5值校验失败")
client.close()
