python2.7和python3.4网络编程处理二进制数据区别



python 2.7中客户端向服务器发送数据demo

ser = socket.socket()

ser.connect((ghost,gport))

lenstr = len(str)

lendata = struct.pack(‘BB‘,lenstr/256,lenstr%256)

ser.send(lendata)

ser.send(str)

recvlen = ser.recv(2)

recvlen = struct.unpack(‘BB‘,recvlen)

totallen = recvlen[0]*256 + recvlen[1]%256

str = ser.recv(totallen)

ser.close()

python 3.4中客户端向服务器发送数据demo

lenstr = ‘%s%s‘ % (lenstr,len(str))

str = "188888888222050%4s%s" % (lenstr,str)

if termtype == 1:

writeloginfo(6,‘[request]::‘+str)

elif termtype == 2:

writeloginfo(5,‘[request]::‘+str)

lenstr = len(str)

lendata = struct.pack(‘!BB‘,0,lenstr)

ser.send(lendata)

ser.send(str.encode())

recvlen = ser.recv(2)

recvlen = struct.unpack(‘!BB‘,recvlen)

totallen = recvlen[0]*256 + recvlen[1]%256

str = ser.recv(totallen)

str = repr(str)