Python_Socket实现简单的ssh/ftp

Socket实现简单的ssh

ssh_服务器端

import socket
import os
import timehost = "0.0.0.0"def echo_server(port):"""A simple echo server"""#Create a TCP socketsock = socket.socket()#Enable reuse address/portsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)#Bind the socket to the portserver_address = (host, port)sock.bind(server_address)print("Starting up echo server on %s port %s" % (server_address))sock.listen(5)while True:print("Waiting for connection client")client, address = sock.accept()while True:data = client.recv(1024)if not data:print("Client has lost....")print("-----------------End-------------------")breakprint("Client sending data:", data.decode())               resp = os.popen(data.decode()).read()# print("resp size:", len(resp)) #总大小client.send(str( len(resp.encode("utf-8"))).encode("utf-8") ) #告诉客户端将要接收的数据大小            # time.sleep(0.5) #Set timeout  解决粘包client_ack = client.recv(1024) #wait client to confirm  解决粘包print("ack from client:", client_ack.decode())client.send(resp.encode("utf-8"))print("------------------------------------------")#end connectionclient.close()sock.close()if __name__ == "__main__":echo_server(9999)

ssh_客户端

import socket  host = "192.168.224.128"  def echo_client(port):  """Create a TCP/IP socket"""  client = socket.socket()  #Connect the socket to the server  server_address = (host, port)  client.connect(server_address)  print("Connecting to %s port %s" % server_address)  while True:  #Send data  message = input("Please enter the information sent>>>:")  if ( len(message) == 0 ): continue  client.send(message.encode("utf-8"))  #Receive message from the server  data_size = client.recv(1024) #接收来自服务器发来的数据大小  print("data_size:", data_size.decode())  client.send("准备好接收了，可以发了".encode("utf-8"))  receive_size = 0  while receive_size != int(data_size.decode()):  data = client.recv(1024)  # 每次收到的大小可能小于1024，所以必须用len获取大小  receive_size += len(data)   print(data.decode())  else:  print("----------------------End-------------------", receive_size)  client.close()  if __name__ == "__main__":  echo_client(9999)

Socket实现简单的ftp

服务器端

import socket
import os
import hashlibhost = "0.0.0.0"def echo_server(port):"""A simple echo server"""#Create a TCP socketsock = socket.socket()#Enable reuse address/portsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)#Bind the socket to the portserver_address = (host, port)sock.bind(server_address)print("Starting up echo server on %s port %s" % (server_address))sock.listen(5)while True:print("Waiting for connection client")client, address = sock.accept()while True:data = client.recv(1024)if not data:print("Client has lost....")print("-----------------End-------------------")breakcmd, filename = data.decode().split()    print("filename:", filename)if os.path.isfile(filename):f = open(filename, "rb")m = hashlib.md5()file_size = os.stat(filename).st_sizeclient.send( str(file_size).encode("utf-8") ) #send file sizeclient.recv(1024) #wait for ackfor line in f:m.update(line)client.send(line)print("server file md5:", m.hexdigest())print("++++++++++++++++++++++++++++++++++++++++++++++++")f.close()client.send(m.hexdigest().encode("utf-8")) #两句send连着可能出现粘包#end connectionclient.close()sock.close()if __name__ == "__main__":echo_server(9999)

客户端

import socket
import hashlibhost = "192.168.224.128"def echo_client(port):"""Create a TCP/IP socket"""client = socket.socket()#Connect the socket to the serverserver_address = (host, port)client.connect(server_address)print("Connecting to %s port %s" % server_address)while True:#Send datacmd = input("Please enter the information sent>>>:")if ( len(cmd) == 0 ): continueif cmd.startswith("get"):client.send(cmd.encode("utf-8"))server_response = client.recv(1024) #接收来自服务器发来的数据大小通知print("server response the file size:", server_response.decode())client.send("ready to recv file".encode("utf-8")) #告诉服务器可以接收了#主要是设置超时，防止出现沾包file_total_size = int( server_response.decode() )receive_size = 0filename = cmd.split()[1]f = open(filename + ".new", "wb")m = hashlib.md5()while receive_size < file_total_size: #防止出现粘包if file_total_size - receive_size > 1024: #要收不止一次size = 1024else: #最后一次，剩多少收多少size = file_total_size - receive_sizeprint("last receive size:", size)data = client.recv(size)m.update(data)receive_size += len(data)f.write(data)# print(receive_size, file_total_size)else:client_file_md5 = m.hexdigest()print( "file_total_size: %d     receive_size: %d" % (file_total_size, receive_size))print("------------file recv done-----------")f.close()server_file_md5 = client.recv(1024)print("server file md5:", server_file_md5.decode())print("client file md5:", client_file_md5)print("++++++++++++++++++++++++++++++++++++++++++++++++++")sock.close()if __name__ == "__main__":echo_client(9999)

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