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Tutorial zur Implementierung von FTP mithilfe von Socket

巴扎黑
Freigeben: 2017-07-18 13:48:27
Original
2748 Leute haben es durchsucht
 
    1、用户加密认证
    2、允许同时多用户登录
    3、每个用户有自己的家目录 ,且只能访问自己的家目录
    4、对用户进行磁盘配额,每个用户的可用空间不同
    5、允许用户在ftp server上随意切换目录
    6、允许用户查看当前目录下文件
    7、允许上传和下载文件,保证文件一致性
    8、文件传输过程中显示进度条
    附加功能:支持文件的断点续传

python 3.5


  用socketserver实现FTP


  
    ConfigParser 是Python自带的模块, 用来读写配置文件,将用户信息以下边的格式存入account.py文件,读出后进行判断
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[DEFAULT]

[alex]
Password = 123456Quotation = 100[jack]
Password = 123456Quotation = 100
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    2、允许同时多用户登录
      从scokerserver 继承 socketserver.ThreadingTCPServer即可实现
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    3、每个用户有自己的家目录 ,且只能访问自己的家目录
      将所有路径封装在home目录下
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BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

USER_HOME = '%s\home' % BASE_DIR
LOG_DIR = '%s\log' % BASE_DIR
LOG_LEVEL = 'DEBUG'
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    4、允许用户在ftp server上随意切换目录
      用os模块改变工作目录
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os.chdir(func_val)
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    5、允许用户查看当前目录下文件
      用os模块的os.listdir,下为server端代码
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    def _ls(self,*args,**kwargs):'''显示当前目录下的所有文件'''if os.getcwd() == '%s\\bin'% settings.BASE_DIR:
            user_home_dir = "%s\%s" % (settings.USER_HOME, self.user["Username"])
            self.request.send(json.dumps(os.listdir(user_home_dir)).encode())else:self.request.send(json.dumps(os.listdir()).encode())
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    6、允许上传和下载文件,保证文件一致性
      判断上传和下载的文件在传输前后的大小,用以判断文件是否保持一致
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  1 #server端  2 #  3     def _put(self,*args,**kwargs):  4         '''上传文件命令'''  5         data = args[0]  6   7         response = self.get_response()  8         if response["status_code"] == 257:  # ready to receive  9             self.request.send(b'1')  # send confirmation to server 10             user_home_dir = "%s\%s" % (settings.USER_HOME, self.user["Username"]) 11             base_filename = "%s\%s" % (user_home_dir, data.get('filename')) 12             received_size = 0 13             file_obj = open(base_filename, 'wb') 14             if data.get('md5'): 15                 md5_obj = hashlib.md5() 16                 while received_size < response[&#39;file_size&#39;]: 17                     line = self.request.recv(4096) 18                     received_size += len(line) 19                     file_obj.write(line) 20                     md5_obj.update(line) 21                 else: 22                     file_obj.close() 23                     md5_val = md5_obj.hexdigest() 24                     self.send_response(258, {&#39;md5&#39;: md5_val}) 25                     print("-----file rece done-----") 26  27             else: 28                 while received_size < response[&#39;file_size&#39;]: 29                     data = self.request.recv(4096) 30                     received_size += len(data) 31                     file_obj.write(data) 32                 else: 33                     print("-----file rece done-----") 34                     file_obj.close() 35         else: 36             print(STATUS_CODE[response["status_code"]]) 37  38  39     def _get(self,*args,**kwargs): 40         &#39;&#39;&#39;下载文件命令&#39;&#39;&#39; 41         data = args[0] 42         if data.get(&#39;filename&#39;) is None: 43             self.send_response(255) 44         user_home_dir = "%s\%s" %(settings.USER_HOME,self.user["Username"]) 45         file_abs_path = "%s\%s" %(user_home_dir,data.get(&#39;filename&#39;)) 46         print("file abs path",file_abs_path) 47  48         if os.path.isfile(file_abs_path): 49             file_obj = open(file_abs_path,&#39;rb&#39;) 50             file_size = os.path.getsize(file_abs_path) 51             self.send_response(257,data = {&#39;file_size&#39;:file_size}) 52             self.request.recv(1)    #等待客户端确认,防粘包 53  54             if data.get(&#39;md5&#39;): 55                 md5_obj = hashlib.md5() 56                 for line in file_obj: 57                     self.request.send(line) 58                     md5_obj.update(line) 59                 else: 60                     file_obj.close() 61                     md5_val = md5_obj.hexdigest() 62                     self.send_response(258,{&#39;md5&#39;:md5_val}) 63                     print("send file done...") 64             else: 65                 for line in file_obj: 66                     self.request.send(line) 67                 else: 68                     file_obj.close() 69                     print("send file done...") 70         else: 71             self.send_response(256) 72  73  74  75  76 # client端 77 # 78     def _get(self,cmd_list): 79         &#39;&#39;&#39;下载文件&#39;&#39;&#39; 80         print("get--",cmd_list) 81         if len(cmd_list) == 1: 82             print("no filename follows...") 83             return 84         data_header = { 85             &#39;action&#39;:&#39;get&#39;, 86             &#39;filename&#39;:cmd_list[1] 87         } 88         if self.__md5_required(cmd_list): 89             data_header[&#39;md5&#39;] = True 90  91         self.sock.send(json.dumps(data_header).encode()) 92         response = self.get_response() 93         print(response) 94         try: 95             if response["status_code"] == 257:#ready to receive 96                 self.sock.send(b&#39;1&#39;) #send confirmation to server 97                 base_filename = cmd_list[1].split(&#39;/&#39;)[-1] 98                 received_size = 0 99                 file_obj = open(base_filename,&#39;wb&#39;)100                 if self.__md5_required(cmd_list):101                     md5_obj = hashlib.md5()102                     progress = self.show_progress(response[&#39;file_size&#39;]) #generator103                     progress.__next__()104                     while received_size < response[&#39;file_size&#39;]:105                         data = self.sock.recv(4096)106                         received_size += len(data)107                         try:108                             progress.send(len(data))109                         except StopIteration as e:110                             print("100%")111                         file_obj.write(data)112                         md5_obj.update(data)113                     else:114                         print("-----file rece done-----")115                         file_obj.close()116                         md5_val = md5_obj.hexdigest()117                         md5_from_server = self.get_response()118                         if md5_from_server[&#39;status_code&#39;] == 258:119                             if md5_from_server[&#39;md5&#39;] == md5_val:120                                 print("%s 文件一致性校验成功!"% base_filename)121                         print(md5_val,md5_from_server)122 123                 else:124                     progress = self.show_progress(response[&#39;file_size&#39;])  # generator125                     progress.__next__()126                     while received_size < response[&#39;file_size&#39;]:127                         data = self.sock.recv(4096)128                         received_size += len(data)129                         file_obj.write(data)130                         try:131                             progress.send(len(data))132                         except StopIteration as e:133                             print("100%")134                     else:135                         print("-----file rece done-----")136                         file_obj.close()137             else:138                 print(STATUS_CODE[response["status_code"]])139         except Exception as e:140             base_file_size = os.path.getsize(base_filename)141             with open(&#39;data\\breakpoint&#39;, &#39;wb&#39;) as br_po:142                 data_header[&#39;action&#39;] = &#39;breakpoint&#39;143                 data_header[&#39;breakpoint&#39;] = base_file_size144                 br_po.write(json.dumps(data_header).encode())145 146 147     def _put(self,cmd_list):148         &#39;&#39;&#39;上传文件&#39;&#39;&#39;149         print("put--", cmd_list)150         if len(cmd_list) == 1:151             print("no filename follows...")152             return153         data_header = {154             &#39;action&#39;: &#39;put&#39;,155             &#39;filename&#39;: cmd_list[1]156         }157         if self.__md5_required(cmd_list):158             data_header[&#39;md5&#39;] = True159 160         self.sock.send(json.dumps(data_header).encode())161         if os.path.isfile(cmd_list[1]):162             file_obj = open(cmd_list[1], &#39;rb&#39;)163             file_size = os.path.getsize(cmd_list[1])164             self.send_response(257, data={&#39;file_size&#39;: file_size})165             self.sock.recv(1)  # 等待服务器端确认166             if self.__md5_required(cmd_list):167                 md5_obj = hashlib.md5()168                 progress = self.show_progress(file_size)  # generator169                 progress.__next__()170                 for line in file_obj:171                     self.sock.send(line)172                     try:173                         progress.send(len(line))174                     except StopIteration as e:175                         print("100%")176                     md5_obj.update(line)177                 else:178                     file_obj.close()179                     md5_val = md5_obj.hexdigest()180                     md5_from_server = self.get_response()181                     if md5_from_server[&#39;md5&#39;] == md5_val:182                             print("%s 文件一致性校验成功!"% cmd_list[1])183                     self.send_response(258, {&#39;md5&#39;: md5_val})184                     print("send file done...")185             else:186                 progress = self.show_progress(file_size)  # generator187                 progress.__next__()188                 for line in file_obj:189                     self.sock.send(line)190                     try:191                         progress.send(len(line))192                     except StopIteration as e:193                         print("100%")194                 else:195                     file_obj.close()196                     print("send file done...")197         else:198             print(256)
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get and put

    7、文件传输过程中显示进度条
      根据已传文件大小和总文件大小比对判断,输出符号
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 1     def show_progress(self,total): 2         &#39;&#39;&#39;显示进度条 3            total: 文件大小&#39;&#39;&#39; 4         received_size = 0 5         current_percent = 0 6         while received_size < total: 7             if int((received_size / total) * 100) > current_percent: 8                 print(">",end='',flush=True) 9                 current_percent = int((received_size / total) * 100)10             new_size = yield11             received_size += new_size
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进度条

 

    附加功能:支持文件的断点续传
      将上次断点信息记录下来,也就是记录已传文件大小,再次启用时,将目标文件光标移到上次断点处,然后进行续传
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 1     def _breakpoint(self,*args,**kwargs): 2         '''断点续传''' 3         data = args[0] 4         if data.get('filename') is None: 5             self.send_response(255) 6         user_home_dir = "%s\%s" % (settings.USER_HOME, self.user["Username"]) 7         file_abs_path = "%s\%s" % (user_home_dir, data.get('filename')) 8         print("file abs path", file_abs_path) 9         print(data.get('breakpoint'))10 11         if os.path.isfile(file_abs_path):12             file_obj = open(file_abs_path, 'rb')13             file_obj.seek(data.get('breakpoint'))14             file_size = os.path.getsize(file_abs_path)15             self.send_response(257, data={'file_size': file_size})16             self.request.recv(1)  # 等待客户端确认17 18             if data.get('md5'):19                 md5_obj = hashlib.md5()20                 for line in file_obj:21                     self.request.send(line)22                     md5_obj.update(line)23                 else:24                     file_obj.close()25                     md5_val = md5_obj.hexdigest()26                     self.send_response(258, {'md5': md5_val})27                     print("send file done...")28             else:29                 for line in file_obj:30                     self.request.send(line)31                 else:32                     file_obj.close()33                     print("send file done...")34         else:35             self.send_response(256)36         pass
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breakpoint

   主要知识点:

    类的继承
    os模块的应用
    json模块的应用
    类方法的运用
    md5加密方法
    scoket链接
    scoketserver链接
    反射
    异常处理


小结:
          这个程序主要用socketserver实现了一台服务器链接多个客户端,并且进行信息交互,并且实现了几个简单的功能,如:get 文件下载、put 上传文件、cd 切换目录、ls 查看文件、breakpoint断点续传。

主要代码:
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  1 #server端  2 #  3   4   5 import os,sys  6 import hashlib  7 import socket  8 import socketserver  9 import json 10 import configparser 11 from conf import settings 12  13  14 STATUS_CODE = { 15     250 : "Invalid cmd format,e.g:{'action':'get','filename':'test.py','size':344", 16     251 : "Invalid cmd", 17     252 : "Invalid auth data", 18     253 : "Wrong username or password..", 19     254 : "Passed authentication", 20     255 : "Filename doesn't provided", 21     256 : "File doesn't exist on server", 22     257 : "ready to send file", 23     258 : "md5 verification", 24     259 : "Directory has been switched" 25 } 26  27  28  29  30  31 class FTPHandler(socketserver.BaseRequestHandler): 32     '''定义request handler类,从BaseRequestHandler类继承''' 33     def handle(self): 34         ''' 35         获取服务器端的信息 36         如果传来cd命令,改变工作目录 37         ''' 38  39         while True: 40             self.data = self.request.recv(1024).strip() 41             if not self.data: 42                 print('Client closed..') 43                 break 44             data = json.loads(self.data.decode()) 45             if data.get('action') is not None: 46                 if hasattr(self,'_%s'%data.get('action')): 47                     func =getattr(self,'_%s'%data.get('action')) 48                     func_val = func(data) 49                     if data.get('action') == 'cd':     #cd 命令,改变工作目录 50                         os.chdir(func_val) 51                     else:pass 52                 else: 53                     print('Invalid cmd') 54                     self.send_response(251) 55             else: 56                 print('Invalid cmd format') 57                 self.send_response(250) 58  59  60     def send_response(self,status_code,data=None): 61         '''向客户端返回数据''' 62         response = {'status_code': status_code, 'status_msg':STATUS_CODE[status_code]} 63         if data: 64             response.update(data) 65         self.request.send(json.dumps(response).encode()) 66  67  68     def _auth(self,*args,**kwargs): 69         '''判断用户是否输入完整的用户名和密码 70            验证用户名和密码是否合法''' 71         data = args[0] 72         if data.get('username') is None or data.get('password') is None: 73             self.send_response(252) 74  75         user = self.authenticate(data.get('username'),data.get('password')) 76         if user is None: 77             self.send_response(253) 78         else: 79             print('passed authentication',user) 80             self.user = user 81             self.send_response(254) 82  83  84     def authenticate(self,username,password):       # 85         '''验证用户合法性,合法返回用户数据''' 86         config = configparser.ConfigParser() 87         config.read(settings.ACCOUNT_FILE) 88         if username in config.sections(): 89             _password = config[username]['Password'] 90             if _password == password: 91                 print('pass auth..',username) 92                 config[username]["Username"] = username 93                 return config[username] 94  95  96     def get_response(self): 97         '''接收客户端回复结果''' 98         data = self.request.recv(1024) 99         data = json.loads(data.decode())100         return data101 102 103     def show_progress(self,total):104         '''显示进度条105            total: 文件大小'''106         received_size = 0107         current_percent = 0108         while received_size < total:109             if int((received_size / total) * 100) > current_percent:110                 print(">",end='',flush=True)111                 current_percent = int((received_size / total) * 100)112             new_size = yield113             received_size += new_size114 115 116     def _put(self,*args,**kwargs):117         '''上传文件命令'''118         data = args[0]119 120         response = self.get_response()121         if response["status_code"] == 257:  # ready to receive122             self.request.send(b'1')  # send confirmation to server123             user_home_dir = "%s\%s" % (settings.USER_HOME, self.user["Username"])124             base_filename = "%s\%s" % (user_home_dir, data.get('filename'))125             received_size = 0126             file_obj = open(base_filename, 'wb')127             if data.get('md5'):128                 md5_obj = hashlib.md5()129                 while received_size < response[&#39;file_size&#39;]:130                     line = self.request.recv(4096)131                     received_size += len(line)132                     file_obj.write(line)133                     md5_obj.update(line)134                 else:135                     file_obj.close()136                     md5_val = md5_obj.hexdigest()137                     self.send_response(258, {&#39;md5&#39;: md5_val})138                     print("-----file rece done-----")139 140             else:141                 while received_size < response[&#39;file_size&#39;]:142                     data = self.request.recv(4096)143                     received_size += len(data)144                     file_obj.write(data)145                 else:146                     print("-----file rece done-----")147                     file_obj.close()148         else:149             print(STATUS_CODE[response["status_code"]])150 151 152     def _get(self,*args,**kwargs):153         &#39;&#39;&#39;下载文件命令&#39;&#39;&#39;154         data = args[0]155         if data.get(&#39;filename&#39;) is None:156             self.send_response(255)157         user_home_dir = "%s\%s" %(settings.USER_HOME,self.user["Username"])158         file_abs_path = "%s\%s" %(user_home_dir,data.get(&#39;filename&#39;))159         print("file abs path",file_abs_path)160 161         if os.path.isfile(file_abs_path):162             file_obj = open(file_abs_path,&#39;rb&#39;)163             file_size = os.path.getsize(file_abs_path)164             self.send_response(257,data = {&#39;file_size&#39;:file_size})165             self.request.recv(1)    #等待客户端确认,防粘包166 167             if data.get(&#39;md5&#39;):168                 md5_obj = hashlib.md5()169                 for line in file_obj:170                     self.request.send(line)171                     md5_obj.update(line)172                 else:173                     file_obj.close()174                     md5_val = md5_obj.hexdigest()175                     self.send_response(258,{&#39;md5&#39;:md5_val})176                     print("send file done...")177             else:178                 for line in file_obj:179                     self.request.send(line)180                 else:181                     file_obj.close()182                     print("send file done...")183         else:184             self.send_response(256)185 186 187 188     def _ls(self,*args,**kwargs):189         &#39;&#39;&#39;显示当前目录下的所有文件&#39;&#39;&#39;190         if os.getcwd() == &#39;%s\\bin&#39;% settings.BASE_DIR:191             user_home_dir = "%s\%s" % (settings.USER_HOME, self.user["Username"])192             self.request.send(json.dumps(os.listdir(user_home_dir)).encode())193         else:self.request.send(json.dumps(os.listdir()).encode())194 195 196 197     def _cd(self,*args,**kwargs):198         &#39;&#39;&#39;改变工作目录&#39;&#39;&#39;199         data = args[0]200         user_home_dir = "%s\%s" % (settings.USER_HOME, self.user["Username"])201         file_abs_path = "%s\%s" %(user_home_dir,data.get(&#39;path&#39;))202         try:203             os.listdir(file_abs_path)204         except FileNotFoundError as e:205             self.request.send(json.dumps(e).encode())206             return207         self.request.send(json.dumps(259).encode())208         os.chdir(file_abs_path)209         return file_abs_path210 211 212     def _breakpoint(self,*args,**kwargs):213         &#39;&#39;&#39;断点续传&#39;&#39;&#39;214         data = args[0]215         if data.get(&#39;filename&#39;) is None:216             self.send_response(255)217         user_home_dir = "%s\%s" % (settings.USER_HOME, self.user["Username"])218         file_abs_path = "%s\%s" % (user_home_dir, data.get(&#39;filename&#39;))219         print("file abs path", file_abs_path)220         print(data.get(&#39;breakpoint&#39;))221 222         if os.path.isfile(file_abs_path):223             file_obj = open(file_abs_path, &#39;rb&#39;)224             file_obj.seek(data.get(&#39;breakpoint&#39;))225             file_size = os.path.getsize(file_abs_path)226             self.send_response(257, data={&#39;file_size&#39;: file_size})227             self.request.recv(1)  # 等待客户端确认228 229             if data.get(&#39;md5&#39;):230                 md5_obj = hashlib.md5()231                 for line in file_obj:232                     self.request.send(line)233                     md5_obj.update(line)234                 else:235                     file_obj.close()236                     md5_val = md5_obj.hexdigest()237                     self.send_response(258, {&#39;md5&#39;: md5_val})238                     print("send file done...")239             else:240                 for line in file_obj:241                     self.request.send(line)242                 else:243                     file_obj.close()244                     print("send file done...")245         else:246             self.send_response(256)247         pass
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server端
  1 #client端  2 #  3   4 import socket  5 import hashlib  6 import os,json  7 import optparse  8 import socketserver  9  10  11 STATUS_CODE = { 12     250 : "Invalid cmd format,e.g:{&#39;action&#39;:&#39;get&#39;,&#39;filename&#39;:&#39;test.py&#39;,&#39;size&#39;:344", 13     251 : "Invalid cmd", 14     252 : "Invalid auth data", 15     253 : "Wrong username or password..", 16     254 : "Passed authentication", 17     255 : "Filename doesn&#39;t provided", 18     256 : "File doesn&#39;t exist on server", 19     257 : "ready to send file", 20     258 : "md5 verification", 21     259 : "Directory has been switched" 22 } 23  24  25  26  27 class FTPClient(object): 28     &#39;&#39;&#39;客户端&#39;&#39;&#39; 29     def __init__(self): 30         &#39;&#39;&#39;用户信息输入格式化 31             变量定义&#39;&#39;&#39; 32         parser = optparse.OptionParser() 33         parser.add_option(&#39;-s&#39;, &#39;--server&#39;, dest=&#39;server&#39;, help =&#39;ftp server ip_addr&#39;) 34         parser.add_option(&#39;-p&#39;,&#39;--port&#39;, type=&#39;int&#39;, dest=&#39;port&#39;, help=&#39;ftp server port&#39;) 35         parser.add_option(&#39;-U&#39;, &#39;--username&#39;, dest=&#39;username&#39;, help=&#39;username&#39;) 36         parser.add_option(&#39;-P&#39;, &#39;--Password&#39;, dest=&#39;password&#39;, help=&#39;password&#39;) 37         self.options, self.args = parser.parse_args() 38         self.verify_args(self.options,self.args) 39         self.make_connection() 40  41  42     def make_connection(self): 43         &#39;&#39;&#39;连接服务器&#39;&#39;&#39; 44         self.sock = socket.socket() 45         self.sock.connect((self.options.server,self.options.port)) 46  47  48  49     def verify_args(self,options,args): 50         &#39;&#39;&#39;校验参数合法性&#39;&#39;&#39; 51         if options.username and options.password: 52             pass 53         elif options.username is None and options.password is None: 54             pass 55         else: 56             if options.username is None or options.password is None: 57                 print(&#39;Error:username and password must be provided together..&#39;) 58         if options.server and options.port: 59             if options.port > 0 and options.port < 65535: 60                 return True 61             else: 62                 exit(&#39;Err:host port must in 0-65535&#39;) 63  64  65     def authenticate(self): 66         &#39;&#39;&#39;用户验证&#39;&#39;&#39; 67         if self.options.username: 68             return self.get_auth_result(self.options.username, self.options.password) 69         else: 70             retry_count = 0 71             while retry_count < 3: 72                 username = input("username:").strip() 73                 password = input("password:").strip() 74                 return self.get_auth_result(username,password) 75  76  77  78  79     def get_auth_result(self,user,password): 80         &#39;&#39;&#39;用户认证&#39;&#39;&#39; 81         data = {&#39;action&#39;:&#39;auth&#39;, 82                 &#39;username&#39;:user, 83                 &#39;password&#39;:password} 84  85         self.sock.send(json.dumps(data).encode()) 86         response = self.get_response() 87         if response.get(&#39;status_code&#39;) == 254: 88             print("Passed authentication!") 89             self.user = user 90             return True 91         else: 92             print(data.get(&#39;status_msg&#39;)) 93         print(&#39;response:&#39;,data) 94  95  96     def __md5_required(self,cmd_list): 97         &#39;&#39;&#39;检测命令是否需要进行MD5验证&#39;&#39;&#39; 98         if &#39;--md5&#39; in cmd_list: 99             return True100 101 102     def show_progress(self,total):103         &#39;&#39;&#39;进度条&#39;&#39;&#39;104         received_size = 0105         current_percent = 0106         while received_size < total:107             if int((received_size / total) * 100) > current_percent:108                 print(">",end='',flush=True)109                 current_percent = int((received_size / total) * 100)110             new_size = yield111             received_size += new_size112 113 114     def send_response(self,status_code,data=None):115         '''向服务器端返回数据'''116         response = {'status_code': status_code, 'status_msg':STATUS_CODE[status_code]}117         if data:118             response.update(data)119         self.sock.send(json.dumps(response).encode())120 121 122     def get_response(self):123         '''得到服务器端回复结果'''124         data = self.sock.recv(1024)125         data = json.loads(data.decode())126         return data127 128 129     def _get(self,cmd_list):130         '''下载文件'''131         print("get--",cmd_list)132         if len(cmd_list) == 1:133             print("no filename follows...")134             return135         data_header = {136             'action':'get',137             'filename':cmd_list[1]138         }139         if self.__md5_required(cmd_list):140             data_header['md5'] = True141 142         self.sock.send(json.dumps(data_header).encode())143         response = self.get_response()144         print(response)145         try:146             if response["status_code"] == 257:#ready to receive147                 self.sock.send(b'1') #send confirmation to server148                 base_filename = cmd_list[1].split('/')[-1]149                 received_size = 0150                 file_obj = open(base_filename,'wb')151                 if self.__md5_required(cmd_list):152                     md5_obj = hashlib.md5()153                     progress = self.show_progress(response['file_size']) #generator154                     progress.__next__()155                     while received_size < response[&#39;file_size&#39;]:156                         data = self.sock.recv(4096)157                         received_size += len(data)158                         try:159                             progress.send(len(data))160                         except StopIteration as e:161                             print("100%")162                         file_obj.write(data)163                         md5_obj.update(data)164                     else:165                         print("-----file rece done-----")166                         file_obj.close()167                         md5_val = md5_obj.hexdigest()168                         md5_from_server = self.get_response()169                         if md5_from_server[&#39;status_code&#39;] == 258:170                             if md5_from_server[&#39;md5&#39;] == md5_val:171                                 print("%s 文件一致性校验成功!"% base_filename)172                         print(md5_val,md5_from_server)173 174                 else:175                     progress = self.show_progress(response[&#39;file_size&#39;])  # generator176                     progress.__next__()177                     while received_size < response[&#39;file_size&#39;]:178                         data = self.sock.recv(4096)179                         received_size += len(data)180                         file_obj.write(data)181                         try:182                             progress.send(len(data))183                         except StopIteration as e:184                             print("100%")185                     else:186                         print("-----file rece done-----")187                         file_obj.close()188             else:189                 print(STATUS_CODE[response["status_code"]])190         except Exception as e:191             base_file_size = os.path.getsize(base_filename)192             with open(&#39;data\\breakpoint&#39;, &#39;wb&#39;) as br_po:193                 data_header[&#39;action&#39;] = &#39;breakpoint&#39;194                 data_header[&#39;breakpoint&#39;] = base_file_size195                 br_po.write(json.dumps(data_header).encode())196 197 198     def _put(self,cmd_list):199         &#39;&#39;&#39;上传文件&#39;&#39;&#39;200         print("put--", cmd_list)201         if len(cmd_list) == 1:202             print("no filename follows...")203             return204         data_header = {205             &#39;action&#39;: &#39;put&#39;,206             &#39;filename&#39;: cmd_list[1]207         }208         if self.__md5_required(cmd_list):209             data_header[&#39;md5&#39;] = True210 211         self.sock.send(json.dumps(data_header).encode())212         if os.path.isfile(cmd_list[1]):213             file_obj = open(cmd_list[1], &#39;rb&#39;)214             file_size = os.path.getsize(cmd_list[1])215             self.send_response(257, data={&#39;file_size&#39;: file_size})216             self.sock.recv(1)  # 等待服务器端确认217             if self.__md5_required(cmd_list):218                 md5_obj = hashlib.md5()219                 progress = self.show_progress(file_size)  # generator220                 progress.__next__()221                 for line in file_obj:222                     self.sock.send(line)223                     try:224                         progress.send(len(line))225                     except StopIteration as e:226                         print("100%")227                     md5_obj.update(line)228                 else:229                     file_obj.close()230                     md5_val = md5_obj.hexdigest()231                     md5_from_server = self.get_response()232                     if md5_from_server[&#39;md5&#39;] == md5_val:233                             print("%s 文件一致性校验成功!"% cmd_list[1])234                     self.send_response(258, {&#39;md5&#39;: md5_val})235                     print("send file done...")236             else:237                 progress = self.show_progress(file_size)  # generator238                 progress.__next__()239                 for line in file_obj:240                     self.sock.send(line)241                     try:242                         progress.send(len(line))243                     except StopIteration as e:244                         print("100%")245                 else:246                     file_obj.close()247                     print("send file done...")248         else:249             print(256)250 251 252     def _ls(self,*args,**kwargs):253         &#39;&#39;&#39;获取当前目录下的所有文件&#39;&#39;&#39;254         print(&#39;ls&#39;.center(30,&#39;-&#39;))255         data_header = {256             &#39;action&#39;: &#39;ls&#39;,257         }258         self.sock.send(json.dumps(data_header).encode())259         ls_val = self.sock.recv(1024)260         ls_val = json.loads(ls_val.decode())261         for obj in ls_val:262             print(obj)263 264 265     def _cd(self,cmd_list):266         &#39;&#39;&#39;改变工作目录&#39;&#39;&#39;267         print("cd--", cmd_list)268         if len(cmd_list) == 1:269             cmd_list.append(&#39;&#39;)270         data_header = {271             &#39;action&#39;: &#39;cd&#39;,272             &#39;path&#39;: cmd_list[1]273         }274         self.sock.send(json.dumps(data_header).encode())275         server_path = self.sock.recv(1024)276         server_path = json.loads(server_path.decode())277         if server_path == 259 :278             print("%s >" % cmd_list[1],end='')279 280 281     def _breakpoint(self,*args,**kwargs):282         '''断点续传'''283         with open('data\\breakpoint', 'rb') as br_po:284             data_header = json.loads(br_po.read().decode())285             br_po.close()286         if data_header:287             print(data_header)288             self.sock.send(json.dumps(data_header).encode())289             response = self.get_response()290             try:291                 if response["status_code"] == 257:  # ready to receive292                     self.sock.send(b'1')  # send confirmation to server293                     base_filename = data_header['filename'].split('/')[-1]294                     received_size = data_header['breakpoint']295                     file_obj = open(base_filename, 'ab')296                     file_obj.seek(data_header['breakpoint'])297                     if self.__md5_required(data_header):298                         md5_obj = hashlib.md5()299                         progress = self.show_progress(response['file_size'])  # generator300                         progress.__next__()301                         while received_size < response[&#39;file_size&#39;]:302                             data = self.sock.recv(4096)303                             received_size += len(data)304                             try:305                                 progress.send(len(data))306                             except StopIteration as e:307                                 print("100%")308                             file_obj.write(data)309                             md5_obj.update(data)310                         else:311                             print("-----file rece done-----")312                             file_obj.close()313                             md5_val = md5_obj.hexdigest()314                             md5_from_server = self.get_response()315                             if md5_from_server[&#39;status_code&#39;] == 258:316                                 if md5_from_server[&#39;md5&#39;] == md5_val:317                                     print("%s 文件一致性校验成功!" % base_filename)318                                     with open(&#39;data\\breakpoint&#39;, &#39;wb&#39;) as br_po:319                                         br_po.write()320                             print(md5_val, md5_from_server)321 322 323 324                     else:325                         progress = self.show_progress(response[&#39;file_size&#39;])  # generator326                         progress.__next__()327                         while received_size < response[&#39;file_size&#39;]:328                             data = self.sock.recv(4096)329                             received_size += len(data)330                             file_obj.write(data)331                             try:332                                 progress.send(len(data))333                             except StopIteration as e:334                                 print("100%")335                         else:336                             print("-----file rece done-----")337                             file_obj.close()338                             with open(&#39;data\\breakpoint&#39;, &#39;wb&#39;) as br_po:339                                 br_po.write()340             except Exception as e:341                 base_file_size = os.path.getsize(base_filename)342                 with open(&#39;data\\breakpoint&#39;, &#39;wb&#39;) as br_po:343                     data_header[&#39;breakpoint&#39;] = base_file_size344                     br_po.write(json.dumps(data_header).encode())345         else:print(&#39;There is no need to transfer files..&#39;)346 347 348     def _helps(self,*args,**kwargs):349         &#39;&#39;&#39;帮助信息&#39;&#39;&#39;350         helps = &#39;&#39;&#39;351             get 文件名     #下载文件352             put 文件名     #上传文件353             ls             #获取当前目录下的所有文件354             cd             #改变工作目录355             breakpoint     #断点续传&#39;&#39;&#39;356         print(helps)357 358 359     def interactive(self):360         &#39;&#39;&#39;根据命令分配函数&#39;&#39;&#39;361         if self.authenticate():362             print(&#39;---start interactive iwth u...(helps  帮助信息)&#39;)363             while True:364                 choice = input("[%s]:" % self.user).strip()365                 if len(choice) == 0: continue366                 cmd_list = choice.split()367                 if hasattr(self, "_%s" % cmd_list[0]):368                     func = getattr(self, "_%s" % cmd_list[0])369                     func(cmd_list)370                 else:371                     print("Invalid cmd")372 373 374 375 if __name__ == &#39;__main__&#39;:376     ftp = FTPClient()377     ftp.interactive()
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client端

Erstellen Sie einen TCP-Server.
Idee: Erstellen Sie einen Socket. Binden Sie den Socket an eine lokale Adresse. Überwachen Sie die Verbindung. Beantworten Sie TCP-Client-Anfragen in einer Endlosschleife (kehren Sie nach dem Empfang zum Client zurück End-Socket)---TCP-Daten akzeptieren---TCP-Daten senden---Sub-Socket schließen---Server-Socket schließen
aus Socket-Import *
aus Zeitimport ctime

HOST = '' # Gibt an, dass jede gültige Adresse gebunden werden kann
PORT = 2157
BUFSIZ = 1024 # Schlüsselwort, Größe ist 1k
ADR= (HOST, PORT)

tcpSerSock = socket(AF_INET , SOCK_STREAM) # Einen netzwerkbasierten TCP-Server-Socket erstellen
tcpSerSock.bind(ADR)
tcpSerSock.listen(5) # Nur 5 Verbindungen gleichzeitig zulassen

while True: # Endlosschleifen-Antwort
print 'wartet auf Verbindung....'
tcpCliSock, addr = tcpSerSock.accept() # Empfangen und speichern Sie den Client-Socket und die Client-Adresse
print '...verbunden von:' , addr

while True:
data = tcpCliSock.recv(BUFSIZ) # Pufferdaten lesen
if not data:
break
tcpCliSock.send('{0} {1 }' .format(ctime(), data)) #Informationen an den Client senden
tcpCliSock.close()
tcpSerSock.close()

TCP-Client erstellen
Idee: Client erstellen socket---connect---sende Daten (beende, wenn das Senden leer ist)---empfange Daten aus dem Puffer (beende, wenn der Empfang fehlschlägt)-- -Client-Socket schließen
vom Socket-Import *

HOST = 'localhost'
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)

tcpCliSock = socket(AF_INET, SOCK_STREAM)
tcpCliSock.connect( ADDR)

while True:
data = raw_input('>')
if not data:
break
tcpCliSock.send(data)
data = tcpCliSock. recv(BUFSIZ)
if not data:
break
print data
tcpCliSock.close()

Erstellen Sie einen UDP-Server
Idee: Socket erstellen---bind the Socket an eine lokale Adresse – Daten empfangen – Daten senden
from socket import *
from time import ctime

HOST = '' # Gibt an, dass jede gültige Adresse gebunden werden kann
PORT = 2157
BUFSIZ = 1024 # Schlüsselwort, Größe ist 1k
ADR= (HOST, PORT)

udpSerSock = socket(AF_INET, SOCK_DGRAM)
udpSerSock.bind(ADR)

while True:
print 'waiting for message...'
data, addr = udpSerSock(BUFSIZ)
udpSerSock.sendto('{0} {1}' .format( ctime(), data), addr)
print '...received from and returns to:', addr
udpSerSock.close()

Erstellen Sie einen UDp-Client
Idee: erstellen Client-Socket---Daten senden---Daten empfangen
aus Socket-Import *
aus Zeitimport ctime

HOST = 'localhost' # Gibt an, dass jede gültige Adresse gebunden werden kann
PORT = 2157
BUFSIZ = 1024 # Schlüsselwort, Größe ist 1k
ADDR= (HOST, PORT)

udpCliSock = socket(AF_INET, SOCK_DGRAM)

while True:
data = raw_input('>')
if not data:
break
udpCliSock .sendto(data, ADDR)
data, ADDR = udpCliSock.recvfrom(BUFSIZ)
if not data :
Pause
Druckdaten
udpCliSock.close()

Das obige ist der detaillierte Inhalt vonTutorial zur Implementierung von FTP mithilfe von Socket. Für weitere Informationen folgen Sie bitte anderen verwandten Artikeln auf der PHP chinesischen Website!

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