Python Socket File Transfer example,

Python Socket File Transfer example,

The sender can continuously send new files, and the receiver can continuously receive new files.

For example, if the sender input is e: \ visio.rar, the receiver will save it as e: \ new_visio.rar by default. multiple concurrent connections are supported. The specific implementation is as follows;

Acceptor:

Method 1:

#-*-Coding: UTF-8-*-import socket, time, SocketServer, struct, OS, threadhost = '2017. 168.50.74 'port = 12307 s = socket. socket (socket. AF_INET, socket. SOCK_STREAM) # define the socket type s. bind (host, port) # bind the Ip address and port number to be monitored, in the tuple format s. listen (1) def conn_thread (connection, address): while True: try: connection. settimeout (600) fileinfo_size = struct. calcsize ('128sl ') buf = connection. recv (fileinfo_size) if buf: # if This Is Not added, the first file is automatically transferred to the next filename, filesize = struct. unpack ('128sl ', buf) filename_f = filename. strip ('\ 00') filenewname = OS. path. join ('e: \ ', ('new _' + filename_f) print 'file new name is % s, filesize is % s' % (filenewname, filesize) recvd_size = 0 # defines the size of the received file. file = open (filenewname, 'wb ') print 'stat refreshing ing... 'While not recvd_size = filesize: if filesize-recvd_size> 1024: rdata = connection. recv (1024) recvd_size + = len (rdata) else: rdata = connection. recv (filesize-recvd_size) recvd_size = filesize file. write (rdata) file. close () print 'receive done' # connection. close () handle T socket. timeout: connection. close () while True: connection, address = s. accept () print ('connectedby', address) # thread = threading. thread (target = conn_thread, args = (connection, address) # threading can also be used # thread. start () thread. start_new_thread (conn_thread, (connection, address) s. close ()

Method 2:

#-*-Coding: UTF-8-*-import socket, time, SocketServer, struct, oshost = '2017. 168.50.74 'port = 12307 ADDR = (host, port) class MyRequestHandler (SocketServer. baseRequestHandler): def handle (self): print ('connectedfrom: ', self. client_address) while True: fileinfo_size = struct. calcsize ('128sl ') # defines the file information. S indicates that the file name is bytes long, and l indicates an int or log file type. Here, the file size is self. buf = self. request. recv (fileinfo_size) if self. buf: # if This Is Not added, the first file will automatically go to the next self. filename, self. filesize = struct. unpack ('128sl ', self. buf) # according to the package information of SL, print 'filesize is: ', self. filesize, 'filename size is: ', len (self. filename) # The file name length is 128, which is greater than the actual length of the file name self. filenewname = OS. path. join ('e: \ ', ('new _' + self. filename ). strip ('\ 00') # print self. filenewname, type (self. filenewname) recvd_size = 0 # defines the size of the received file = open (self. filenewname, 'wb ') print 'stat processing ing... 'While not recvd_size = self. filesize: if self. filesize-recvd_size> 1024: rdata = self. request. recv (1024) recvd_size + = len (rdata) else: rdata = self. request. recv (self. filesize-recvd_size) recvd_size = self. filesize file. write (rdata) file. close () print 'receive done' # self. request. close () tcpServ = SocketServer. threadingTCPServer (ADDR, MyRequestHandler) print ('Waiting for connection... ') tcpServ. serve_forever ()

Sender:

#-*-Coding: UTF-8-*-import socket, OS, structs = socket. socket (socket. AF_INET, socket. SOCK_STREAM) s. connect ('2017. 168.50.74 ', 12307) while True: filepath = raw_input ('Please Enter chars: \ r \ n') if OS. path. isfile (filepath): fileinfo_size = struct. calcsize ('128sl ') # define packaging rules # define file header information, including file name and file size fhead = struct. pack ('128sl ', OS. path. basename (filepath), OS. stat (filepath ). st_size) s. send (fhead) print 'client filepath: ', filepath # with open (filepath, 'rb') as fo: there is a problem with sending the file, after sending, some items will be sent in the past fo = open (filepath, 'rb') while True: filedata = fo. read (1024) if not filedata: break s. send (filedata) fo. close () print 'send over... '# s. close ()

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