python_socket

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說明

1.需要對send 和recv的內容進行decode()和encode(),否則會報錯,即使在.py最上面添加# -*- coding: utf-8 -*-

該部分內容爲轉載

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在StackOverflow上發現有人也出現同樣的問題，並一個叫Scharron的人提出瞭解答：

In python 3, bytes strings and unicodestrings are now two different types. Since sockets are not aware of string encodings, they are using raw bytes strings, that have a slightly differentinterface from unicode strings.

So, now, whenever you have a unicode stringthat you need to use as a byte string, you need toencode() it. And whenyou have a byte string, you need to decode it to use it as a regular(python 2.x) string.

Unicode strings are quotes enclosedstrings. Bytes strings are b"" enclosed strings

  

When you use client_socket.send(data),replace it by client_socket.send(data.encode()). When you get datausing data = client_socket.recv(512), replace it by data =client_socket.recv(512).decode()

  

 

Codec.encode(input[, errors])

Encodes the object input and returns atuple (output object, length consumed). Encoding converts a string object to abytes object using a particular character set encoding

  

Codec.decode(input[, errors])

Decodes the object input and returns atuple (output object, length consumed). Decoding converts a bytes objectencoded using a particular character set encoding to a string object.

input must be a bytes object or one whichprovides the read-only character buffer interface – for example, buffer objectsand memory mapped files.

  

套接字的成員函數send

socket.send(bytes[, flags]) 形參爲字節類型

socket.recv(bufsize[, flags]) Receive datafrom the socket. The return value is a bytes object representing the data received.

str->bytes:encode編碼

bytes->str:decode解碼

str.encode()
bytes.decode()

socket服務端

# -*- coding: utf-8 -*-

from socket import *

from time import ctime

HOST = '10.69.141.11'                        #主機(服務器)地址

PORT = 20000

BUFSIZE = 1024

ADDR = (HOST,PORT)

tcpSerSock = socket(AF_INET, SOCK_STREAM)  # 創建套接字

tcpSerSock.bind(ADDR)                      # 監聽

tcpSerSock.listen(5)

while True:

    print 'wating for connection...'

    tcpCliSock,addr = tcpSerSock.accept()  #被動接收連接

    print '...connected from:',addr

    while True:

        data = tcpCliSock.recv(BUFSIZE).decode()#接收來自客戶端的數據

        if  data=='exit':

            break

        print data                      #輸出客戶端的數據

        sersay=raw_input("what do you want to say")

        tcpCliSock.send('%s'% (sersay).encode()) #返回給客戶端的數據   發送給客戶端的代碼必須編碼

    tcpCliSock.close()

tcpSvrSock.close()

 

socket客戶端

# -*- coding: utf-8 -*-

from socket import *

HOST = '10.69.141.11'

PORT=20000 #IP地址一致，指向服務器地址PORT = 20000

BUFSIZE = 1024

ADDR = (HOST,PORT)

tcpCliSock = socket(AF_INET, SOCK_STREAM)

tcpCliSock.connect(ADDR)

while True:

    data= input()

    print ("so %s old" %data )

    if  data=='exit':

        break

    tcpCliSock.send(data.encode())            #發送給服務器的數據

    data = tcpCliSock.recv(BUFSIZE).decode()  #接收數據

    if data=='exit':

        break

    print (data)

tcpCliSock.close()