Python Transfer files

Transfer file Simple version

Server side:

Import Socketimport structimport Jsonimport osshare_dir = R ' C:\py3Project\ lu fei \ Third module \ Chapter II Network programming \05_ file transfer \ Simple version \server\share '  Ip_port = (' 127.0.0.1 ', 8999) def bytes2human (n): Symbols = (' K ', ' M ', ' G ', ' T ', ' P ', ' E ') prefix = {} for I, S in Enumerate (symbols): # << left shift one means multiply by 2 that is 1 << 1=2, two bits means 4 that is 1 << 2=4, # 10 bits means 1024 is 1 <&lt ;            10=1024 is 2 of the n-th square prefix[s] = 1 << (i + 1) * for s in reversed (symbols): If n >= prefix[s]:    Value = Float (n)/prefix[s] return '%.2f%s '% (value, s) return "%SB"% ndef get (conn,file_name): # 3, read the way to open the file, read the contents of the file sent to the client # The first step: make a fixed-length header print (' get ') try:header_dict = {' file_name ': fil        E_name, ' MD5 ': ' xxx ', ' file_size ': Os.path.getsize (Os.path.join (Share_dir, file_name))}         Header_json = Json.dumps (header_dict, ensure_ascii= ' False ', indent=2) header_bytes = Header_json.encode (' Utf-8 ')      # Step Two: Send the length of the header first  Conn.send (Struct.pack (' I ', Len (header_bytes)) # Step three: Resend Header Conn.send (header_bytes) # Fourth step: Send real data again    With open (Os.path.join (Share_dir, file_name), ' RB ') as-f:for line-in-f:conn.send (line)     Except Exception as E:print (e) def put (Conn, file_name): "" "Receive client upload file:P Aram Conn::p Aram file_name:  : Return: "" "# 2, open a new file in writing, receive the contents of the file sent by the client to the server new file # First step: The length of the first header Header_len = CONN.RECV (4) header_size = Struct.unpack (' i ', Header_len) [0] # Step two: Re-accept the header Header_json = Conn.recv (header_size). Decode (' Utf-8 ') # Step three: Parse from the header Description of the real data Header_dict = Json.loads (header_json) file_size = header_dict[' file_size '] file_name = header_dict[' F Ile_name '] Print (Os.path.join (Share_dir, file_name) # Fourth step: Receive real data, write to file with open (Os.path.join (Share_dir, File_na            ME), ' WB ') as F:recv_size = 0 while recv_size < File_size:line = CONN.RECV (1024)           F.write (line) Recv_size + = Len Print (' Total size:%s uploaded size:%s '% (Bytes2human (file_size), Bytes2human (Recv_size))) def run (): Server = Socket.socket (socket.af_inet, socket. SOCK_STREAM) Server.bind (Ip_port) Server.listen (5) print (' starting ... ') while true:conn, addr = Server . Accept () print (addr) while True:try: # 1 Receive Command res = CONN.RECV (1024 # b ' Get a.txt ' if not Res:break # 2, parse command, extract corresponding command parameter Cmds = Res.decode (' utf-                    8 '). Split () # [GET, A.txt] if cmds[0] = = ' Get ': Get (conn, cmds[1]) # download file            # file_name = cmds[1] elif cmds[0] = = ' put ': put (conn, cmds[1]) # upload file Except Connectionreseterror: #适用于windows操作系统 break Conn.close () server.close () if __name__ = = ' _ _main__ ': Run ()

　　

Client Side

　　

#!/usr/bin/env Python3 #-*-coding:utf-8-*-import socketimport structimport jsonimport osshare_dir = R ' C:\py3Project\ Lu Fei \ third module \ Chapter II Network programming \05_ file transfer \ Simple version \client\download ' Ip_port = (' 127.0.0.1 ', 8999) def bytes2human (n): Symbols = (' K ', ' M ', ' G ', ' T ', ' P ', ' E ') prefix = {} for I, s in enumerate (symbols): # << left shift left one means multiply by 2 that's 1 << 1=2, two bits means 4 is 1 & lt;< 2=4, # 10 bits means 1024 is 1 << 10=1024 is 2 n prefix[s] = 1 << (i + 1) * Ten for S in revers    Ed (symbols): If n >= prefix[s]: value = float (n)/prefix[s] return '%.2f%s '% (value, s) Return "%SB"% ndef get (client, file_name): # 2, open a new file in a written way, the content of the file received by the server is written to the client's new file # The first step: the length of the first header is Header_len = CLIENT.RECV (4) header_size = Struct.unpack (' i ', Header_len) [0] # Step two: Re-receive header Header_json = CLIENT.RECV (header_size). Decode (' Utf-8 ') # Step three: Parse the description of real data from the header header_dict = Json.loads (header_json) file_size = header_dict[' file_size ' ] file_name = Header_dict[' file_name ' Print (Os.path.join (Share_dir, file_name)) # Fourth step: Receive real data, write to file with open (Os.path.join (Share_dir,            file_name), ' WB ') as F:recv_size = 0 while recv_size < File_size:line = CLIENT.RECV (1024) F.write (line) Recv_size + = Len (line) print (' Total size:%s downloaded size:%s '% (Bytes2human (file_size), b Ytes2human (recv_size)) def put (client, file_name): # Upload the file to the server print (' put ') Try:if not Os.path.isfile (OS.P            Ath.join (Share_dir, file_name)): Print (' file:%s is not exists '% Os.path.join (Share_dir, file_name))                 return else:file_size = Os.path.getsize (Os.path.join (Share_dir, file_name)) Header_dict = {            ' file_name ': file_name, ' MD5 ': ' xxx ', ' file_size ': file_size} Header_json = Json.dumps (header_dict, ensure_ascii= ' False ', indent=2) header_bytes = Header_json.encod E (' Utf-8 ') #Step two: First send the length of the header client.send (struct.pack (' I ', Len (header_bytes)) # Step three: Resend Header Client.send (head Er_bytes) # Fourth step: Send the real data again with open (Os.path.join (Share_dir, file_name), ' RB ') as F:fo R line on F:client.send (line) except Exception as E:print (e) def run (): client = Socket.s Ocket (socket.af_inet, socket. SOCK_STREAM) Client.connect (ip_port) while True: # 1, send command cmd = input (' >> '). Strip () # ' Get A.tx T ' if not cmd:continue client.send (Cmd.encode (' utf-8 ')) if Cmd.startswith (' Get '): Get (Clie  NT, Cmd.split () [1]) elif cmd.startswith (' put '): Put (client, Cmd.split () [1]) Client.close () if __name__ = = ' __main__ ': Run ()

　

Output results

Sever:starting ... (' 127.0.0.1 ', 19074) getgetc:\users\jingjing\pycharmprojects\py3project\ Lu Fei \ Third module \ Chapter II Network programming \05_ file transfer \ Simple version \server\ Share\3.jpeg Total size: 75.36K   uploaded Size: 1.00K total size: 75.36K   uploaded size: 2.00K ... Total size: 75.36K   uploaded size:75.36kclient:>> get 1.pptxc:\py3project\ road fly \ Third module \ Chapter II Network programming \05_ file transfer \ Simple version \client\download\ 1.pptx Total size: 970.93K   downloaded size: 1.00K Total size: 970.93K   downloaded size: 2.00K ... Total size: 970.93K   

　　

Transfer files optimized version

Server side:

Import socketimport structimport jsonimport osclass tcpserver:ip_port = (' 127.0.0.1 ', 8999) request_queue_size = 5 allow_reuse_address = False Max_packet_size = 8192 Share_dir = R ' C:\py3Project\ lu fei \ Third module \ Chapter II Network programming \05_ file transfer \ Simple version \serve R\share ' Def __init__ (self, Address=ip_port, bind_and_activate=true): Self.server = Socket.socket (Socket.AF_INET , socket. SOCK_STREAM) if Bind_and_activate:try:self.server.bind (address) Self.ser Ver.listen (self.request_queue_size) print (' starting ... ') except Exception as E:s Elf.server.close () Raise e def get_request (self): "" "Get the request and client address from the        Socket. "" "Return Self.server.accept () def run (self): when True:self.conn, self.client_addr = self.               Get_request () print (' From client ', self.client_addr) while True:try:     # 1 Receive Command res = SELF.CONN.RECV (self.max_packet_size) # b ' Get a.txt ' if not res:                    Break # 2, Parse command, extract the corresponding command parameter CMDS = Res.decode (' Utf-8 '). Split () # [GET, A.txt] If Hasattr (self, cmds[0]): Func = GetAttr (self, Cmds[0]) func (cmd        S[1]) except Connectionreseterror: # applies to Windows operating system break Self.conn.close () Self.server.close () def put (self, file_name): "" "Receive client upload file:P Aram Conn::p Aram fil        E_name:: Return: "" "Print (' Get file%s '% file_name) # 2, open a new file as written, receive the contents of the file sent by the client to the new file on the server # First Step: Take the length of the header Header_len = SELF.CONN.RECV (4) header_size = Struct.unpack (' i ', Header_len) [0] # Step two: Re-receive the header Header_json = Self.conn.recv (header_size). Decode (' Utf-8 ') # Step three: Parse a description of the real data from the header Header_dic t = json.loads (HEADER_JSON) file_size = header_dict[' file_size '] file_name = header_dict[' file_name '] print (os.path.join            . Share_dir, file_name) # Fourth step: Receive the real data, write the file with open (Os.path.join (Self.share_dir, file_name), ' WB ') as F: recv_size = 0 while recv_size < File_size:line = Self.conn.recv (self.max_packet_siz                e) F.write (line) Recv_size + = Len (line) rate = recv_size/file_size * 100        Print (' Total size:%s uploaded:%%%.2f '% (Self.bytes2human (file_size), rate)) @staticmethod def bytes2human (n): Symbols = (' K ', ' M ', ' G ', ' T ', ' P ', ' E ') prefix = {} for I, s in enumerate (symbols): # <& Lt Move left one means multiply by 2, 1 << 1=2, two bits means 4 that is 1 << 2=4, # 10 bits means 1024 or 1 << 10=1024 is 2 n-th square prefix [s] = 1 << (i + 1) * Ten for S in reversed (symbols): If n >= prefix[s]: value = f Loat (n)/prefix[s]               Return '%.2f%s '% (value, s) return "%SB"% n def get (self, file_name): # 3, open the file in read mode, read the file                Content sent to client # First step: Make a fixed-length header print (' Send file%s '% file_name) try:header_dict = { ' file_name ': file_name, ' MD5 ': ' xxx ', ' file_size ': Os.path.getsize (Os.path.join (self.sh            Are_dir, file_name)} Header_json = Json.dumps (header_dict, ensure_ascii= ' False ', indent=2) Header_bytes = Header_json.encode (' utf-8 ') # Step two: First send the length of the header Self.conn.send (the Struct.pack (' I ', Len (he ader_bytes)) # Third step: Resend Header Self.conn.send (header_bytes) # Fourth step: Send real data again with open (Os.path.join (Self.share_dir, file_name), ' RB ') as F:for line in F:self.conn.send (line ) except Exception as E:print (e) if __name__ = = ' __main__ ': s = TCPServer () s.run ()

　　

Client side:

Import socketimport structimport jsonimport osclass tcpclient:ip_port = (' 127.0.0.1 ', 8999) request_queue_size = 5 allow_reuse_address = False Max_packet_size = 8192 Share_dir = R ' C:\py3Project\ lu fei \ Third module \ Chapter II Network programming \05_ file transfer \ Simple version \clien T\download ' Def __init__ (self, Address=ip_port, connect=true): Self.client = Socket.socket (socket.af_inet, Socke T.sock_stream) if Connect:try:self.client.connect (address) except Exception            As E:self.client.close () Raise E def run (self): while True: # 1, Send command INP = input (' >> '). Strip () # ' Get a.txt ' if not inp:continue self.client.send (INP.E Ncode (' utf-8 ')) cmd = Inp.split () if hasattr (self, cmd[0]): func = Getatt  R (self, Cmd[0]) func (cmd[1]) client.close () @staticmethod def bytes2human (n): symbols = (' K ', ' M ', ' G ', ' T ', ' P', ' E ') prefix = {} for I, s in enumerate (symbols): # << left Shift left one represents multiply by 2 that is 1 << 1=2, and two bits represents        4 i.e. 1 << 2=4, # 10 bits means 1024 i.e. 1 << 10=1024 is 2 n prefix[s] = 1 << (i + 1) * 10                For s in reversed (symbols): If n >= prefix[s]: value = float (n)/prefix[s] Return '%.2f%s '% (value, s) return "%SB"% n def get (self, file_name): # 2, open a new file as written, write the contents of the file received by the server         Customer's new file # First step: Take the length of the header first Header_len = SELF.CLIENT.RECV (4) header_size = Struct.unpack (' i ', Header_len) [0]        # Step Two: Collect the header Header_json = Self.client.recv (header_size). Decode (' Utf-8 ') # Step three: Parse a description of the real data from the header Header_dict = Json.loads (header_json) file_size = header_dict[' file_size '] file_name = header_dict[' File_n Ame '] Print (Os.path.join (Self.share_dir, file_name)) # Fourth step: Receive the real data, write the file with open (Os.path.join (self.s Hare_dir, file_name), ' WB ') as F:recv_size = 0 while recv_size < File_size:line = Self.client.recv (self. max_packet_size) F.write (line) Recv_size + = Len (line) rate = Recv_size/file        _size * Print (' Total size:%s downloaded:%%%.2f '% (Self.bytes2human (file_size), rate)) def put (self, file_name): # Upload files to the server print (' put ') Try:if not Os.path.isfile (Os.path.join (Self.share_dir, file_name)            ): Print (' file:%s is not exists '% Os.path.join (Self.share_dir, file_name)) return                     Else:file_size = Os.path.getsize (Os.path.join (Self.share_dir, file_name)) Header_dict = {                    ' file_name ': file_name, ' MD5 ': ' xxx ', ' file_size ': file_size                } Header_json = Json.dumps (header_dict, ensure_ascii= ' False ', indent=2) Header_bytes = Header_jsOn.encode (' Utf-8 ') # Step two: First send the length of the header self.client.send (struct.pack (' I ', Len (header_bytes))) # Step Three: Resend the header self.client.send (header_bytes) # Fourth step: Send the real data again W ITH open (Os.path.join (Self.share_dir, file_name), ' RB ') as F:for line in F:sel    F.client.send (line) except Exception as E:print (e) if __name__ = = ' __main__ ': c = TCPClient () C.run ()

　　

Output Result:

　

Sever:starting...from client  (' 127.0.0.1 ', 3500) send file 3.jpegget file 1.pptxc:\py3project\ road fly \ Third module \ Chapter II Network programming \05_ File transfer \ Simple version \server\share\1.pptx total size: 970.93K   uploaded:%0.82 ... Total size: 970.93K   uploaded:%99.96 total size: 970.93K   uploaded:%100.00client:c:/py3project/luffy/Third module/Chapter II network programming/05_ file transfer/simple version/client/ File_client.py>> get 3.jpegc:\py3project\ road fly \ Third module \ Chapter II Network programming \05_ file transfer \ Simple version \client\download\3.jpeg total size: 75.36K   downloaded:%10.62 ... Total size: 75.36K   Downloaded:%99.49 Total size: 75.36K   

　　

　　

Python Transfer files