server.py
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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
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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() |
以上就是python 基于selectors库实现文件上传与下载的详细内容,更多关于python 上传下载的资料请关注服务器之家其它相关文章!
原文链接:https://www.cnblogs.com/sugh/p/13930873.html