server端
import socket,os,time,hashlib
server=socket.socket()
server.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)#允许重用地址
server.bind(("0.0.0.0",7008))#允许任意IP连接
server.listen()
while True:
conn,addr=server.accept()
print("new connect:",addr)
while True:
print("等待新指令...")
data=conn.recv(1024)
if not data:
print("客户端已经断开...")
break
cmd,filename=data.decode().split()
print(filename)
if os.path.isfile(filename):
f=open(filename,'rb')
m=hashlib.md5()
file_size=os.stat(filename).st_size
conn.send(str(file_size).encode())#send file size
conn.recv(1024)#wait for ack
for line in f:
m.update(line)
conn.send(line)
print("file md5:",m.hexdigest())
f.close()
conn.send(m.hexdigest().encode())#send md5
print('send done')
else:#如果文件不存在就发送一个错误码，并且重新接收命令
print("download file not exist")
False_ack='file not exist'
conn.send(False_ack.encode())
server.close()
client端
import socket,hashlib
client=socket.socket()
client.connect(('192.168.74.20',7008))
while True:
cmd=input("请输入get+文件名:").strip()
if len(cmd)==0:continue
if cmd.startswith("get"):
client.send(cmd.encode())
server_response=client.recv(1024)
if server_response.decode()=="file not exist":
continue#如果文件不存在就重新输入命令
print("接收文件大小为:",server_response.decode(),"字节")
client.send(b"ready ro recive file")
file_total_size=int(server_response.decode())
recived_size=0
filename=cmd.split()[1]
f=open(filename+'.new',"wb")
m=hashlib.md5()
while recived_size<file_total_size:
if file_total_size - recived_size>1024:#要收不止一次
size=1024
else:#最后一次了，剩多少收多少
size=file_total_size-recived_size
print("last recive:",size,"字节")
data=client.recv(size)
recived_size+=len(data)
m.update(data)
f.write(data)
# print(file_total_size,received_size)
else:
new_file_md5=m.hexdigest()
print("file recive done\nrecived_size:",recived_size,"字节")
print("file_total_size:",file_total_size,"字节")
f.close()
server_file_md5=client.recv(1024)
print("server file md5:",server_file_md5.decode("utf-8"))
print("recive file md5:",new_file_md5)
else:#如果命令首字母不是get就重新输入命令
continue
client.close()
