十. 网络编程(FTP案例 知识点）

一. FTP案例 (相关知识点)

1.进度条

print('86%',end='')
print('86%',end='')

# 86%86%

tup="当前进度条%s%%"%(90)
print(tup)
# 当前进度条90%

import  time
def bar(size,tup_size):
     val=int(size/tup_size*100)
     time.sleep(1)
     print('
%s%%'%(val),end='')
for i in range(101):
    bar(i,100)

def bar(size, tup_size):
    val = int(size / tup_size * 100)
    time.sleep(1)
    print('
%s%% %s' % (val,"#"*val), end='')
for i in range(101):
    bar(i, 100)

2.获取文件大小 

import os
file=r'H:python之路day401aa'
path2=os.path.getsize(file)
path1=os.stat(file).st_size


print(type(path2),path2)  # <class 'int'> 15
print(type(path1),path1)# <class 'int'> 15

print(os.path.basename(file))

aa=os.path.dirname(file)
print(aa)

 3.FTP断点续传

client
import  socket,json,hashlib,os
cli=socket.socket()
cli.connect(('192.168.59.1',8500))

# 对文件md5加密
def file_md5(file_path):
        obj=open(file_path,"rb")
        m=hashlib.md5()
        for line in  obj:
            m.update(line)
        obj.close()
        return m.hexdigest()


while True:
        cmd=input("请输入命令:").strip()
        file_path=r'H:python之路day40111.jpg'
        file_val_md5=file_md5(file_path)

        # 获取文件名
        file_name=os.path.basename(file_path)  # 返回绝对路径的文件名
        print(file_name)

        # 文件小
        file_size=os.stat(file_path).st_size
        print(file_size)


        # 自定义协议
        cmd_dict={"cmd":'upload','filename': file_name,'flie_szie':file_size,"md5": file_val_md5}
        upload_cmd_bytes=json.dumps(cmd_dict).encode("utf-8")
        cli.sendall(upload_cmd_bytes)
        response=json.loads(cli.recv(8999).decode())
        print(response)

        if response["code"]==1001:  # 文件不存中可以不 断点传输
              # # 通过迭代来发送数据
              #   with open(file_path, "rb") as f1:
              #           for line in f1:
              #               cli.sendall(line)

                f1=open(file_path,"rb")
                send_date = 0
                while file_size>send_date:
                        date=f1.read(1024)
                        cli.sendall(date)
                        send_date+=len(date)
                f1.close()
                print("上传成功了哈哈哈哈")

        else:
                # 文件存中可以 断点传输  + 文件大小
                exist_size=response.get("size")
                f=open(file_path,"rb")
                f.seek(exist_size)
                send_date= exist_size
                while send_date<file_size:
                        date = f.read(1024)
                        cli.sendall(date)
                        send_date += len(date)
                f.close()

server

import  socketserver,json,os
ip_port=('192.168.59.1',8500)
import shutil

class Myserver(socketserver.BaseRequestHandler):

     def handle(self):
         conn=self.request
         addr=self.client_address

         upload_bytes= conn.recv(2048).decode("utf-8")
         cmd_dict=json.loads(upload_bytes)

         # print(cmd_dict)  {'cmd': 'upload', 'filename': 'aa', 'flie_szie': 15, 'md5': 'ef13d7ea0e497e494dec5ffddf4fff14'}
         file_md5=cmd_dict.get("md5")     #  通过md5来 拼路径
         # print(file_md5)    ef13d7ea0e497e494dec5ffddf4fff14

         file_name = cmd_dict.get("filename")
         file_path = os.path.join('home', 'msg',file_name)


         file_md5_path=os.path.join('home','msg',file_md5)
         # print( file_md5_path)   homemsgef13d7ea0e497e494dec5ffddf4fff14
         file_size= cmd_dict.get("flie_szie")


         # 判断文件石否存中
         exist=os.path.exists( file_md5_path)
         if not exist :   # 文件不存中可以不 断点传输
             response={'code':1001}
             conn.sendall(json.dumps(response).encode("utf-8"))
             recv_size=0
             f=open(file_md5_path,"wb")
             while  recv_size<file_size:
                 date=conn.recv(1024)
                 f.write(date)    # 写到了内存
                 f.flush()         # 刷到硬盘本地文件
                 recv_size+=len(date)
                 # return
             f.close()

             # 改名字    os.rename()在py2会报错    和这是相等的shutil.move()
             shutil.move(file_md5_path,file_path)

         else:    # 文件存中可以 断点传输  + 文件大小

             exist_size=os.stat( file_md5_path).st_size #获取文件大小 字节的方式  等同于 exist_size=os.path.getsize(file_path)
             response = {'code': 1002,"size":exist_size}
             conn.sendall(json.dumps(response).encode("utf-8"))
             f = open(file_md5_path, "ab")
             recv_size = exist_size
             while recv_size<file_size:
                 date = conn.recv(1024)
                 f.write(date)  # 写到了内存
                 f.flush()  # 刷到硬盘本地文件
                 recv_size += len(date)
             f.close()
             os.rename(file_md5_path,file_path)
server=socketserver.ThreadingTCPServer(ip_port,Myserver)
server.serve_forever()