Socket编程三

# 服务端
# -*- coding: UTF-8 -*-
import socket, struct, os, _thread

host = ‘127.0.0.1‘
port = 12307
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # 定义socket类型
s.bind((host, port))  # 绑定需要监听的Ip和端口号，tuple格式
s.listen(1)


def conn_thread(connection):
    while True:
        try:
            connection.settimeout(600)
            fileinfo_size = struct.calcsize(‘12sl‘)  # 12s表示12个字符，l表示一个长整型数
            buf = connection.recv(fileinfo_size)
            if buf:   # 如果不加这个if，第一个文件传输完成后会自动走到下一句，需要拿到文件大小信息才可以继续执行
                filename, filesize = struct.unpack(‘12sl‘, buf)
                filename_f = filename.decode("utf-8").strip(‘\00‘)  # C语言中’\0’是一个ASCII码为0的字符,在python中表示占一个位置得空字符
                filenewname = os.path.join(‘e:\\‘, os.path.basename(filename_f))
                print(u‘文件名称:%s , 文件大小: %s‘ % (filenewname, filesize))
                recvd_size = 0  # 定义接收了的文件大小
                file = open(filenewname, ‘wb‘)
                print(u"开始传输文件内容")
                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()
        except socket.timeout:
            connection.close()


while True:
    print(u"开始进入监听状态")
    connection, address = s.accept()
    print(‘Connected by ‘, address)
    # thread = threading.Thread(target=conn_thread,args=(connection,address)) #使用threading也可以
    # thread.start()
    _thread.start_new_thread(conn_thread, (connection))
    s.close()

# 客户端
# -*- coding: UTF-8 -*-
import socket, os, struct

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((‘127.0.0.1‘, 12307))
while True:
    filepath = input(‘请输入要传输的文件绝对路径:\r\n‘)
    if os.path.isfile(filepath):
        #fileinfo_size = struct.calcsize(‘20sl‘)  # 定义打包规则
        # 定义文件头信息，包含文件名和文件大小
        fhead = struct.pack(‘12sl‘, filepath.encode("utf-8"), os.stat(filepath).st_size)
        print(os.stat(filepath).st_size)
        s.send(fhead)
        print (u‘文件路径: ‘, filepath)
        # with open(filepath,‘rb‘) as fo: 这样发送文件有问题，发送完成后还会发一些东西过去
        fo = open(filepath, ‘rb‘)
        while True:
            filedata = fo.read(1024)
            if not filedata:
                break
            s.send(filedata)
        fo.close()
        print (u‘传输成功‘)
        # s.close()

# -*- coding: utf-8 -*-
import socket
HOST = ‘127.0.0.1‘  # 本地localhost
PORT = 50008
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(5)
while True:
       print (u"开始进入监听状态")
       conn,addr = s.accept()#接收连接
       print ("开始接收连接从: ",addr)
       while True:
           try:
               data = conn.recv(1024)
               if not data:
                   break
               print ("收到",data)
               msg = u"这是一个多进程服务测试"
               conn.sendall(msg.encode("utf-8"))
           except socket.error:
               break
       conn.close()

#encoding=utf-8
import socket

HOST=‘127.0.0.1‘
PORT=50008
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#定义socket类型，网络通信，TCP
s.connect((HOST,PORT))       #要连接的IP与端口
times=3
while times>0:
    cmd=input("向服务器发送命令:")       #与人交互，输入命令
    s.sendall(cmd.encode("utf-8"))      #把命令发送给对端
    data=s.recv(1024)     #把接收的数据定义为变量
    print (data.decode("utf-8"))         #输出变量
    times-=1
s.close()   #关闭连接