day29-2018-11-26-网络编程

import socketserver

class KnightServer(socketserver.BaseRequestHandler):

    def handle(self):
        # self.request  相当于conn链接通道
        while 1:
            from_client_msg = self.request.recv(1024)
            print(from_client_msg.decode('utf-8'))
            server_msg = input('服务端说>>>')
            self.request.send(server_msg.encode('utf-8'))


if __name__ == '__main__':
    ip_port = ('127.0.0.1',8001)
    server = socketserver.ThreadingTCPServer(ip_port,KnightServer)
    server.serve_forever()

import socket
import time
client = socket.socket()
client.connect(('127.0.0.1',8001))

while 1:
    client_data = input('别开车>>>')
    client.send(client_data.encode('utf-8'))

    from_server_msg = client.recv(1024)
    print(from_server_msg.decode('utf-8'))

client.close()

粘包解决方案一

import socket
import subprocess
server = socket.socket()
ip_port = ('127.0.0.1',8001)
server.bind(ip_port)
server.listen()
conn,addr = server.accept()
while 1:
    from_client_cmd = conn.recv(1024).decode('utf-8')

    sub_obj = subprocess.Popen(
        from_client_cmd,
        shell=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
    )
    #subprocess对象.read 得到的结果是bytes类型的
    cmd_res = sub_obj.stdout.read()
    data_len = len(cmd_res)
    data_len_str = str(data_len)
    print('结果长度>>>',data_len)

    conn.send(data_len_str.encode('utf-8'))
    client_stutas = conn.recv(1024).decode('utf-8')
    if client_stutas == 'ok':

        conn.send(cmd_res)
    else:
        print('客户端长度信息没有收到')

import json
import socket

client = socket.socket()
ip_port = ('127.0.0.1',8001)
client.connect(ip_port)


while 1:
    client_cmd = input('请输入系统指令>>>')
    client.send(client_cmd.encode('utf-8'))
    from_server_datalen = client.recv(1024).decode('utf-8')

    client.send(b'ok')

    from_server_result = client.recv(int(from_server_datalen))

    print(from_server_result.decode('gbk'))

#粘包解决方案二
import socket
import subprocess
import struct
server = socket.socket()
ip_port = ('127.0.0.1',8001)
data_full_len = 0 #统计发送数据的长度
server.bind(ip_port)
server.listen()
conn,addr = server.accept()
while 1:
    from_client_cmd = conn.recv(1024).decode('utf-8')

    sub_obj = subprocess.Popen(
        from_client_cmd,
        shell=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
    )
    #subprocess对象.read 得到的结果是bytes类型的
    cmd_res = sub_obj.stdout.read()
    data_len = len(cmd_res)  #总数据长度
    data_len_str = str(data_len)
    print('结果长度>>>',data_len)

    #将真实数据长度打包成4个字节的数据
    struct_data_len = struct.pack('i',data_len)

    conn.send(struct_data_len + cmd_res)

import json
import socket
import struct
client = socket.socket()
ip_port = ('127.0.0.1',8001)
client.connect(ip_port)
all_recv_len = 0
all_data_byte = b''

while 1:
    client_cmd = input('请输入系统指令>>>')
    client.send(client_cmd.encode('utf-8'))
    #先接收4个字节,这4个字节是真实数据长度加工成的
    recv_data_len = client.recv(4)
    #将4个字节长度的数据,解包成后面真实数据的长度
    real_data_len = struct.unpack('i',recv_data_len)[0]

    print(real_data_len)

    server_result = client.recv(real_data_len)

    print(server_result.decode('gbk'))

合法性验证

from socket import *
import hmac,os

secret_key=b'Jedan has a big key!'
def conn_auth(conn):
    '''
    认证客户端链接
    :param conn:
    :return:
    '''
    print('开始验证新链接的合法性')
    msg=os.urandom(32)#生成一个32字节的随机字符串
    conn.sendall(msg)
    h=hmac.new(secret_key,msg)
    digest=h.digest()
    respone=conn.recv(len(digest))
    return hmac.compare_digest(respone,digest)

def data_handler(conn,bufsize=1024):
    if not conn_auth(conn):
        print('该链接不合法,关闭')
        conn.close()
        return
    print('链接合法,开始通信')
    while True:
        data=conn.recv(bufsize)
        if not data:break
        conn.sendall(data.upper())

def server_handler(ip_port,bufsize,backlog=5):
    '''
    只处理链接
    :param ip_port:
    :return:
    '''
    tcp_socket_server=socket(AF_INET,SOCK_STREAM)
    tcp_socket_server.bind(ip_port)
    tcp_socket_server.listen(backlog)
    while True:
        conn,addr=tcp_socket_server.accept()
        print('新连接[%s:%s]' %(addr[0],addr[1]))
        data_handler(conn,bufsize)

if __name__ == '__main__':
    ip_port=('127.0.0.1',9999)
    bufsize=1024
    server_handler(ip_port,bufsize)

from socket import *
import hmac,os

secret_key=b'Jedan has a big key!'
def conn_auth(conn):
    '''
    验证客户端到服务器的链接
    :param conn:
    :return:
    '''
    msg=conn.recv(32)
    h=hmac.new(secret_key,msg)
    digest=h.digest()
    conn.sendall(digest)

def client_handler(ip_port,bufsize=1024):
    tcp_socket_client=socket(AF_INET,SOCK_STREAM)
    tcp_socket_client.connect(ip_port)

    conn_auth(tcp_socket_client)

    while True:
        data=input('>>: ').strip()
        if not data:continue
        if data == 'quit':break

        tcp_socket_client.sendall(data.encode('utf-8'))
        respone=tcp_socket_client.recv(bufsize)
        print(respone.decode('utf-8'))
    tcp_socket_client.close()

if __name__ == '__main__':
    ip_port=('127.0.0.1',9999)
    bufsize=1024
    client_handler(ip_port,bufsize)

day29-2018-11-26-网络编程

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