Upload and download based on TCP protocol

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Client Side

Import socketimport sysimport osimport jsonimport Structsk = Socket.socket () adress = (' 192.168.12.11 ', 29231) def upload ()    : message = {' filename ': none, ' FileSize ': none} sk.connect (adress) temp = ' upload ' sk.send (temp.encode (' Utf-8 ')) Meg = input (' Input file path: ') filename = Os.path.basename (meg) filesize = Os.path.getsize (meg) message[' filename '] = FileName message[' filesize '] = filesize str_message = json.dumps (message) Len_message = Len (str_message) B_len _message = Struct.pack (' i ', len_message) sk.send (b_len_message + str_message.encode (' Utf-8 ')) with open (Meg, ' RB ') a s F:while filesize:connent = F.read () sk.send (connent) FileSize-= Len (connent) d EF Download (): Path = Os.path.dirname (Os.path.abspath (__file__)) sk.connect (adress) temp = ' Download ' Sk.send (TEMP.E Ncode (' utf-8 ')) num = Sk.recv (1024x768). Decode (' Utf-8 ') print (' Downloadable file:%s '% (num,)) name = input (' Enter download file name: ') sk.se nd (Name.encode (' Utf-8 '))   Path = '/'. Join ([path, ' local file ', name]) B_len_message = SK.RECV (4) len_message = Struct.unpack (' i ', b_len_message) [ 0] res_s = SK.RECV (len_message). Decode (' utf-8 ') str_message = Json.loads (res_s) filesize = str_message[' FileSize '            ] with open (path, ' AB ') as f:while filesize:connent = Sk.recv (1024x768) f.write (connent) F.flush () FileSize-= Len (connent) def main (): dic = [(' Upload ', ' upload '), (' Download ', ' Downlo Ad ')] for I in enumerate (DIC, 1): Print (i[0], i[1][0]) num = int (input (' Enter option: ')) GetAttr (sys.modules[ __NAME__], dic[num-1][1]) () sk.close () if __name__ = = ' __main__ ': Main ()

Server Side

Import Socketimport structimport Osimport Jsonpath = Os.path.abspath (__file__) path = os.path.dirname (path) SK = Socket.socket () adress = (' 0.0.0.0 ', 29231) sk.bind (adress) Sk.listen (4) conn, addr = sk.accept () def upload (path): B_len_m Essage = CONN.RECV (4) len_message = Struct.unpack (' i ', b_len_message) [0] res_s = CONN.RECV (len_message). Decode (' utf-    8 ') Str_message = json.loads (res_s) filename = ' 1 ' + str_message[' filename '] filesize = str_message[' filesize ']  Path = '/'. Join ([path, ' client uploaded file ', filename]) with open (path, ' AB ') as f:while filesize:connent =    CONN.RECV (1024x768) f.write (connent) F.flush () filesize-= Len (connent) def download (path):  message = {' filename ': none, ' FileSize ': none} res = Os.listdir ('/'. Join ([path, ' client uploaded file ')]) sum = ' For i '    res:sum = sum + ' + i + ' conn.send (Sum.encode (' utf-8 ')) filename = Conn.recv (1024x768). Decode (' Utf-8 ') Path = '/'. Join ([path, ' Client-uploaded file '), filename]) filesize = os.path.getsize (path) message[' filename '] = path message[' filesize '] = filesize str_me Ssage = json.dumps (message) Len_message = Len (str_message) b_len_message = Struct.pack (' i ', len_message) Conn.sen D (b_len_message + str_message.encode (' Utf-8 ')) with open (path, ' RB ') as f:while filesize:connent = F.read () conn.send (connent) FileSize-= Len (connent) def main (): res_s = Conn.recv (1024x768). Decode (' U Tf-8 ') if res_s = = ' upload ': Upload (path) sk.close () If res_s = ' Download ': Download (path) Sk.clo SE () if __name__ = = ' __main__ ': While 1:main ()

Upload and download based on TCP protocol