server.py
import selectors
import socket
import os
import time
BASE_DIR =os.path.abspath(os.path.dirname(__file__))
class selectFtpserver:
def __init__(self):
self.dic = {} # 创建空字典
self.hasReceived = 0
self.hasSend=0
self.sel = selectors.DefaultSelector() # 生成一个select对象
self.create_socket() #create_socket()是创建socket对象函数完成绑定功能
self.hanle() #handle()函数完成循环监听
def create_socket(self):
sock = socket.socket()
sock.bind(('127.0.0.1', 8899))
sock.listen()
sock.setblocking(False)
self.sel.register(sock, selectors.EVENT_READ, self.accept) # 把刚生成的sock连接对象注册到select连接列表中,并交给accept函数处理
print("服务端已打开,请连接客户端")
def hanle(self):
while True:
events = self.sel.select() # 默认是阻塞,有活动连接就返回活动的连接列表
# 这里看起来是select,其实有可能会使用epoll,如果你的系统支持epoll,那么默认就是epoll
# print("event==",events)
for key, mask in events:
callback = key.data # 去调accept函数
callback(key.fileobj, mask) # key.fileobj就是readable中的一个socket连接对象
def accept(self,sock, mask):
conn, addr = sock.accept() # Should be ready
print('accepted', conn, 'from', addr)
conn.setblocking(False) # 设定非阻塞
self.sel.register(conn, selectors.EVENT_READ, self.read) # 新连接注册read回调函数
self.dic[conn] = {} # 在空字典里进行了conn赋值,self.dic={conn:{},}
def read(self, conn, mask): # 接收了conn和mask
try: # 加异常防止客户端突然断开
if not self.dic[conn]: # 判断self.dic[conn]里面是否是空字典,如果是空字典,代表第一次进来
print('====第一次进来')
data = conn.recv(1024) # conn接收了客户端发来的数据
print("data==",str(data, encoding='utf-8'))
cmd, filename,filesize = str(data, encoding='utf-8').split('|') # 把接收到客户端发来的包解开拿到cmd,filename,filesize个信息
self.dic = {conn: {"cmd": cmd, "filename": filename, "filesize": int(filesize)}} # 把拿到的cmd,filename,filesize信息放到self.dic字典里去后程序返回到handle()函数里的events继续监听
print(self.dic)
if cmd == 'put': # 如果接收的信息是put
conn.send(bytes("OK", encoding='utf8')) # 给客户端返回一条数据
if self.dic[conn]['cmd'] == 'get':
file = os.path.join(BASE_DIR, "upload", filename)
if os.path.exists(file):
print("文件存在的情况,返回YES给客户端")
filesize = os.path.getsize(file)
self.dic[conn]['filesize'] = filesize
print("self.dic",self.dic)
send_info = '%s|%s' % ('YES', filesize)
conn.send(bytes(send_info, encoding='utf8'))
else:
print("文件不存在情况下")
send_info = '%s|%s' % ('NO', 0)
conn.send(bytes(send_info, encoding='utf8'))
self.dic[conn] = {} #文件不存在的情况下,要将清空字典
else: # 如果不是空字典代表不是第一次进来
print('不是第一次来的')
print(self.dic)
if self.dic[conn].get('cmd', None): # 对接收的命令进行分发判断是put还是get
cmd = self.dic[conn].get('cmd')
if hasattr(self, cmd): # 如果cmd=put调用put函数,如果是cmd=get函数调用get函数
func = getattr(self, cmd)
func(conn)
else:
print("error cmd!")
conn.close()
else:
print("error cmd!")
conn.close()
except Exception as e:
print('断开的客户端信息是:', conn)
self.sel.unregister(conn) # 如果没有接收到数据做一个关闭解除
conn.close()
# put上传函数
def put(self, conn):
fileName = self.dic[conn]['filename']
fileSize = self.dic[conn]['filesize']
# print("BASE_DIR",BASE_DIR)
path = os.path.join(BASE_DIR, "upload", fileName) # 拿到要接收的信息
# print(fileName,fileSize,path)
recv_data = conn.recv(1024) # 接收客户端上传的数据1024字节
self.hasReceived += len(recv_data) # 把接收的数据累加到变量self.hasReceived
with open(path, 'ab') as f: # 打开文件
f.write(recv_data) # 把接收的数据写到文件里去
if fileSize == self.hasReceived: # 判断文件大小跟接收大小是否一样
if conn in self.dic.keys(): # 如果文件大小跟接收大小一样清空字典
self.dic[conn] = {}
self.hasReceived = 0 #S上传结束之后,需要将self.hasReceived 重置成功
print("%s 上传完毕!" % fileName)
def get(self,conn):
fileName = self.dic[conn]['filename']
file = os.path.join(BASE_DIR, "upload", fileName)
# fileSize = os.path.getsize(file)
fileSize=self.dic[conn]['filesize']
data = conn.recv(1024) # conn接收了客户端发来的数据
dataOK = str(data, encoding='utf-8')
if dataOK == 'OK':
with open(file, 'rb') as f: # 打开文件
while fileSize > self.hasSend: # 循环的发送文件给客户端
contant = f.read(1024)
recv_size = len(contant)
conn.send(contant)
self.hasSend += recv_size
s = str(int(self.hasSend / fileSize * 100)) + "%"
print("正在下载文件: " + fileName + " 已经下载:" + s)
if fileSize == self.hasSend: # 判断文件大小跟接收大小是否一样
if conn in self.dic.keys(): # 如果文件大小跟接收大小一样清空字典
self.dic[conn] = {}
print("%s 下载完毕!" % fileName)
self.hasSend = 0
if __name__ == '__main__':
selectFtpserver()
client.py
import socket
import os,sys
BASE_DIR=os.path.dirname(os.path.abspath(__file__))
class selectFtpClient:
def __init__(self):
self.args=sys.argv #sys.argv在命令行输入的参数,第一个参数默认文件名,第二个参数跟IP地址和端口
if len(self.args)>1: #如果大于1把第二个参数俩个值赋值给port
self.port=(self.args[1],int(self.args[2]))
else:
self.port=("127.0.0.1",8899) #如果没有第二个参数默认取这个
self.create_socket() #
self.command_fanout() #进行命令分发
self.mainPath = os.path.join(BASE_DIR, 'filename') # 获取该客户端下的filename路径
#create_socket函数创建socket对象连接服务端
def create_socket(self):
try:
self.sk = socket.socket()
self.sk.connect(self.port)
print('连接FTP服务器成功!')
except Exception as e:
print("eroor:",e)
#command_fanout()函数进行命令分发
def command_fanout(self):
while True:
try:
print("----------------welcome to ftp client-------------------")
self.help_info()
cmd_info = input('>>>请输入操作命令:').strip() # put 12.png images
if not cmd_info:
continue
cmd,file = cmd_info.split() ##按照空格分隔
# print("命令是什么", cmds)
if cmd == "quit":
break
if hasattr(self, cmd):
func = getattr(self, cmd)
func(cmd,file)
Tag = input("是否继续进入ftp clinet,请选择Y/N:").strip()
if Tag.upper() == 'Y':
continue
else:
break
else:
print('No such command ,please try again')
except Exception as e: # server关闭了
print('%s' % e)
break
def help_info(self):
print ('''
get + (文件名) 表示下载文件
put + (文件名) 表示上传文件
quit 表示退出登录
''')
#put()上传函数
def put(self,cmd,file):
if os.path.isfile(file): #判断本地文件是否存在
fileName = os.path.basename(file) #取出文件的名字
fileSize = os.path.getsize(file) #取出文件的大小
fileInfo = '%s|%s|%s'%(cmd,fileName,fileSize) #给文件名字大小打包成fileInf
self.sk.send(bytes(fileInfo, encoding='utf8')) #调用send方法把fileInf发给服务端
recvStatus = self.sk.recv(1024) #接收服务端返回的OK内容
print('recvStatus' , recvStatus)
hasSend = 0
if str(recvStatus, encoding='utf8') == "OK": #如果接收到服务端返回的OK
with open(file, 'rb') as f: #打开文件
while fileSize > hasSend : #循环的去上传文件
contant = f.read(1024)
recv_size = len(contant)
self.sk.send(contant)
hasSend += recv_size
s=str(int(hasSend/fileSize*100))+"%"
print("正在上传文件: "+fileName+" 已经上传:" +s)
print('%s文件上传完毕' % (fileName,))
else:
print('要上传的文件不存在')
#get()下载函数
def get(self,cmd,fileName):
path = os.path.join(BASE_DIR, "download", fileName) # 拿到要接收的信息
fileSize=0
fileInfo = '%s|%s|%s' % (cmd, fileName, fileSize) # 给文件名字大小打包成fileInf
print(fileInfo)
self.sk.send(bytes(fileInfo, encoding='utf8')) # 调用send方法把fileInfo发给服务端
recvdata = self.sk.recv(1024) # 接收服务端返回的是否存在文件内容
recvStatus, fileSize = str(recvdata, encoding='utf-8').split('|')
print("recvStatus==",recvStatus,fileSize)
fileSize = int(fileSize)
hasReceived = 0
if recvStatus == "YES": # 如果接收到服务端返回的YES
self.sk.send(bytes('OK', encoding='utf8')) # 通知服务端可以正常下载了
while fileSize > hasReceived: # 循环的发送文件给客户端
recv_data = self.sk.recv(1024) # 接收客户端上传的数据1024字节
hasReceived += len(recv_data) # 把接收的数据累加到变量self.hasReceived
print("hasReceived",hasReceived)
with open(path, 'ab') as f: # 打开文件
f.write(recv_data) # 把接收的数据写到文件里去
if fileSize == hasReceived: # 判断文件大小跟接收大小是否一样
print("%s 下载完毕!" % fileName)
recvStatus = 'YESS'
else:
print('要下载的文件不存在')
if __name__=='__main__':
selectFtpClient()