Stick package to solve the problem custom protocol tcp protocol

1. Here is the text of the column by tcp file transfers, use struct module package to solve the sticky problem

   # server端
   importsocket
   importjson
   importstruct
   ​
   sk= socket.socket()
   sk.bind(('127.0.0.1', 9000))
   sk.listen()
   conn, addr= sk.accept()
   ​
   msg_len= conn.recv(4)   # b'"\x00\x00\x00'
   dic_len= struct.unpack('i', msg_len)[0]   # int类型
   msg= conn.recv(dic_len).decode('utf-8')
   msg= json.loads(msg)
   ​
   withopen(msg['filename'], 'wb') asf:
      whilemsg['filesize'] >0:
          content= conn.recv(1024)
          msg['filesize'] -= len(content)
          f.write(content)
   conn.close()
   sk.close()
   ​
   # client端
   importsocket
   importos
   importjson
   importstruct
   ​
   ​
   sk= socket.socket()
   sk.connect(('127.0.0.1', 9000)) abs_path with =  'you want to transfer the absolute path of the file to the server side' R & lt filename =  OS. Path. The basename ( abs_path with) filesize =  OS. Path. GetSize ( abs_path with) DIC = { 'filename':  filename,  ' filesize ':  filesize} str_dic =  . JSON dumps ( DIC) b_dic =  str_dic. encode ( ' UTF-. 8 ') MLEN =  struct. Pack ( ' I ',  len ( b_dic)) SK. Send ( MLEN) SK. Send ( b_dic) with Open ( abs_path, 
   
   
   
   
   
   
   
   
   
   
   
   mode='rb') asf:
      whilefilesize>0:
          content= f.read(1024)
          filesize-= len(content)
          sk.send(content)
   sk.close()