ホームページ >バックエンド開発 >Python チュートリアル >ソケットを使用した FTP の実装に関するチュートリアル
ソケットを使用した FTP の実装に関するチュートリアル
- 巴扎黑オリジナル
- 2017-07-18 13:48:272743ブラウズ
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
[DEFAULT] [alex] Password = 123456Quotation = 100[jack] Password = 123456Quotation = 100
2、允许同时多用户登录 从scokerserver 继承 socketserver.ThreadingTCPServer即可实现
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
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'
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
os.chdir(func_val)
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
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())
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
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['file_size']: 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, {'md5': md5_val}) 25 print("-----file rece done-----") 26 27 else: 28 while received_size < response['file_size']: 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 '''下载文件命令''' 41 data = args[0] 42 if data.get('filename') 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('filename')) 46 print("file abs path",file_abs_path) 47 48 if os.path.isfile(file_abs_path): 49 file_obj = open(file_abs_path,'rb') 50 file_size = os.path.getsize(file_abs_path) 51 self.send_response(257,data = {'file_size':file_size}) 52 self.request.recv(1) #等待客户端确认，防粘包 53 54 if data.get('md5'): 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,{'md5':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 '''下载文件''' 80 print("get--",cmd_list) 81 if len(cmd_list) == 1: 82 print("no filename follows...") 83 return 84 data_header = { 85 'action':'get', 86 'filename':cmd_list[1] 87 } 88 if self.__md5_required(cmd_list): 89 data_header['md5'] = 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'1') #send confirmation to server 97 base_filename = cmd_list[1].split('/')[-1] 98 received_size = 0 99 file_obj = open(base_filename,'wb')100 if self.__md5_required(cmd_list):101 md5_obj = hashlib.md5()102 progress = self.show_progress(response['file_size']) #generator103 progress.__next__()104 while received_size < response['file_size']: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['status_code'] == 258:119 if md5_from_server['md5'] == 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['file_size']) # generator125 progress.__next__()126 while received_size < response['file_size']: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('data\\breakpoint', 'wb') as br_po:142 data_header['action'] = 'breakpoint'143 data_header['breakpoint'] = base_file_size144 br_po.write(json.dumps(data_header).encode())145 146 147 def _put(self,cmd_list):148 '''上传文件'''149 print("put--", cmd_list)150 if len(cmd_list) == 1:151 print("no filename follows...")152 return153 data_header = {154 'action': 'put',155 'filename': cmd_list[1]156 }157 if self.__md5_required(cmd_list):158 data_header['md5'] = 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], 'rb')163 file_size = os.path.getsize(cmd_list[1])164 self.send_response(257, data={'file_size': 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['md5'] == md5_val:182 print("%s 文件一致性校验成功！"% cmd_list[1])183 self.send_response(258, {'md5': 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)
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
1 def show_progress(self,total): 2 '''显示进度条 3 total: 文件大小''' 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
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
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：
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['file_size']: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, {'md5': md5_val})138 print("-----file rece done-----")139 140 else:141 while received_size < response['file_size']: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 '''下载文件命令'''154 data = args[0]155 if data.get('filename') 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('filename'))159 print("file abs path",file_abs_path)160 161 if os.path.isfile(file_abs_path):162 file_obj = open(file_abs_path,'rb')163 file_size = os.path.getsize(file_abs_path)164 self.send_response(257,data = {'file_size':file_size})165 self.request.recv(1) #等待客户端确认，防粘包166 167 if data.get('md5'):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,{'md5':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 '''显示当前目录下的所有文件'''190 if os.getcwd() == '%s\\bin'% 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 '''改变工作目录'''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('path'))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 '''断点续传'''214 data = args[0]215 if data.get('filename') 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('filename'))219 print("file abs path", file_abs_path)220 print(data.get('breakpoint'))221 222 if os.path.isfile(file_abs_path):223 file_obj = open(file_abs_path, 'rb')224 file_obj.seek(data.get('breakpoint'))225 file_size = os.path.getsize(file_abs_path)226 self.send_response(257, data={'file_size': file_size})227 self.request.recv(1) # 等待客户端确认228 229 if data.get('md5'):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, {'md5': 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
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:{'action':'get','filename':'test.py','size':344", 13 251 : "Invalid cmd", 14 252 : "Invalid auth data", 15 253 : "Wrong username or password..", 16 254 : "Passed authentication", 17 255 : "Filename doesn't provided", 18 256 : "File doesn'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 '''客户端''' 29 def __init__(self): 30 '''用户信息输入格式化 31 变量定义''' 32 parser = optparse.OptionParser() 33 parser.add_option('-s', '--server', dest='server', help ='ftp server ip_addr') 34 parser.add_option('-p','--port', type='int', dest='port', help='ftp server port') 35 parser.add_option('-U', '--username', dest='username', help='username') 36 parser.add_option('-P', '--Password', dest='password', help='password') 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 '''连接服务器''' 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 '''校验参数合法性''' 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('Error:username and password must be provided together..') 58 if options.server and options.port: 59 if options.port > 0 and options.port < 65535: 60 return True 61 else: 62 exit('Err:host port must in 0-65535') 63 64 65 def authenticate(self): 66 '''用户验证''' 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 '''用户认证''' 81 data = {'action':'auth', 82 'username':user, 83 'password':password} 84 85 self.sock.send(json.dumps(data).encode()) 86 response = self.get_response() 87 if response.get('status_code') == 254: 88 print("Passed authentication!") 89 self.user = user 90 return True 91 else: 92 print(data.get('status_msg')) 93 print('response:',data) 94 95 96 def __md5_required(self,cmd_list): 97 '''检测命令是否需要进行MD5验证''' 98 if '--md5' in cmd_list: 99 return True100 101 102 def show_progress(self,total):103 '''进度条'''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['file_size']: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['status_code'] == 258:170 if md5_from_server['md5'] == 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['file_size']) # generator176 progress.__next__()177 while received_size < response['file_size']: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('data\\breakpoint', 'wb') as br_po:193 data_header['action'] = 'breakpoint'194 data_header['breakpoint'] = base_file_size195 br_po.write(json.dumps(data_header).encode())196 197 198 def _put(self,cmd_list):199 '''上传文件'''200 print("put--", cmd_list)201 if len(cmd_list) == 1:202 print("no filename follows...")203 return204 data_header = {205 'action': 'put',206 'filename': cmd_list[1]207 }208 if self.__md5_required(cmd_list):209 data_header['md5'] = 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], 'rb')214 file_size = os.path.getsize(cmd_list[1])215 self.send_response(257, data={'file_size': 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['md5'] == md5_val:233 print("%s 文件一致性校验成功！"% cmd_list[1])234 self.send_response(258, {'md5': 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 '''获取当前目录下的所有文件'''254 print('ls'.center(30,'-'))255 data_header = {256 'action': 'ls',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 '''改变工作目录'''267 print("cd--", cmd_list)268 if len(cmd_list) == 1:269 cmd_list.append('')270 data_header = {271 'action': 'cd',272 'path': 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['file_size']: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['status_code'] == 258:316 if md5_from_server['md5'] == md5_val:317 print("%s 文件一致性校验成功！" % base_filename)318 with open('data\\breakpoint', 'wb') 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['file_size']) # generator326 progress.__next__()327 while received_size < response['file_size']: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('data\\breakpoint', 'wb') as br_po:339 br_po.write()340 except Exception as e:341 base_file_size = os.path.getsize(base_filename)342 with open('data\\breakpoint', 'wb') as br_po:343 data_header['breakpoint'] = base_file_size344 br_po.write(json.dumps(data_header).encode())345 else:print('There is no need to transfer files..')346 347 348 def _helps(self,*args,**kwargs):349 '''帮助信息'''350 helps = '''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'''356 print(helps)357 358 359 def interactive(self):360 '''根据命令分配函数'''361 if self.authenticate():362 print('---start interactive iwth u...（helps 帮助信息）')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__ == '__main__':376 ftp = FTPClient()377 ftp.interactive() TCP サーバーを作成する
アイデア: ソケットを作成します---ソケットをローカル アドレスにバインドします---接続をリッスンします---無限ループで TCP クライアント リクエストに応答します (クライアント ソケットは受信後に返されます) ) )---TCP データを受け入れる---TCP データを送信---サブソケットを閉じる---サーバーソケットを閉じる
fromソケット import *
from time import ctime
HOST = '' # バインドできることを意味します 任意有効なアドレス
PORT = 2157
BUFSIZ = 1024 # キーワード、サイズ 1k
ADR= (HOST, PORT)
tcpSerSock =ソケット(AF_INET, SOCK_STREAM) # ネットワークベースの TCP サーバーソケットバインド
tcpSerSock を作成します。
tcpSerSock.listen(5) # 同時に 5 つの接続のみを許可します
while True: # listen するための無限ループ
Print '接続を待っています....'
tcpCliSock, addr = tcpSerSock.accept() # Receive ,クライアントソケットとクライアントアドレスを保存します
print '...connected from:', addr
while True:
data = tcpCliSock.recv(BUFSIZ) # データでない場合はバッファデータを読み取ります
アイデア: を作成します。クライアントソケット---接続---データを送信（送信が空の場合は終了）---バッファからデータを受信（受信が失敗した場合は終了）---ソケットインポートからクライアントソケット
を閉じる *
HOST = 'localhost'
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)
tcpCliSock =ソケット(AF_INET, SOCK_STREAM)
tcpCliSock.connect(ADDR)
True:
while data = raw_input('>' )
data でない場合:
Break
tcpCliSock.send(data)
data = tcpCliSock.recv(BUFSIZ)
data でない場合:
データを印刷する
tcpCliSock.close()
UDP サーバーを作成する
アイデア: ソケットを作成する---ソケットをローカルアドレスにバインドします--データを受信します---データを送信
from ソケット import *
from time import ctime
HOST = '' # は、任意の有効なアドレスをバインドできることを意味します
PORT = 2157
BUFSIZ = 1024 # キーワード、サイズは 1k です
ADR= (HOST, PORT)
udpSerSock =socket(AF_INET, SOCK_DGRAM)
udpSerSock.bind(ADR)
while True ; ...から受信し、次のように返されます:', addr
udpSerSock .close()
UDp クライアントを作成します
アイデア: クライアントソケットを作成します --- データを送信 --- データを受信します
from ソケット import *
from time import ctime
HOST = 'localhost' # 任意の有効なアドレスが可能であることを示しますバインドされる
PORT = 2157
BUFSIZ = 1024 # キーワード、サイズは1k
ADDR= (HOST, PORT)
udpCliSock =ソケット(AF_INET, SOCK_DGRAM)
while True:
data = raw_input('>')
データでない場合:
Break
udpCliSock.sendto(data, ADDR)
data, ADDR = udpCliSock.recvfrom(BUFSIZ)
データでない場合:
Break
print data
udpCliSock.close()
以上がソケットを使用した FTP の実装に関するチュートリアルの詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。
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