使用socket实现的ftp文件传输服务器

服务端：

# encoding:utf-8
# Author:"richie"
# Date:8/23/2017

from socket import *
import pickle
import os

server=('127.0.0.1',17001)
root_path= os.path.abspath(os.curdir) # The absolute path of the current folder
sock = socket(AF_INET, SOCK_STREAM)
sock.bind(server)
sock.listen(5)
print('Wait for the client connection!!!')
while True: # Link cycle
    conn, addr = sock.accept() #Waiting for client connection
    print('Connect by',addr)
    while True:    # Communication cycle
        try:
            data = conn.recv(1024) # Receive client data
            if not data: break
            filename = data.decode('utf-8') # Bytes -> String
            file_path = os.path.join(root_path,filename) # join path
            # get file size if file not existed file size is zero
            file_size = os.path.getsize(file_path) if os.path.exists(file_path) else 0
            header = pickle.pack('q', file_size)  # pack header
            conn.send(header)   # send header
            if file_size:   #The file exists and size than 0
                with open(file_path,'rb') as f:
                    for line in f:
                        conn.send(line)   # send line of file data
            else:
                conn.send(b'')
        except ConnectionResetError as e:  # conn　abnormal
            break
        except Exception as e:
            print(e)
    conn.close()

客户端

# encoding:utf-8
# Author:"richie"
# Date:8/23/2017

from socket import *
import pickle,sys
import os
def progress(percent,width=250):
    if percent >= 100:
        percent=100
    show_str=('[%%-%ds]' %width) %(int(width * percent / 100) * "#") #字符串拼接的嵌套使用
    print("
%s %d%%" %(show_str, percent),end='',file=sys.stdout,flush=True)

server=('127.0.0.1',17001)
sock = socket(AF_INET,SOCK_STREAM)
sock.connect(server)
root_path= os.path.abspath(os.curdir) # The absolute path of the current folder

while True:
    print('The current home path is '+root_path)
    filename = input('Please enter the path>>:').strip()
    if not filename:continue
    sock.send(filename.encode('utf-8'))
    header = sock.recv(8) # Receive the header
    total_size = pickle.unpack('q',header)[0] # get header data
    each_recv_size = 1024*8421
    recv_size = 0
    recv_data = b''
    down_filename = 'down_'+filename
    f = open(down_filename,'wb')
    while recv_size < total_size:
        if total_size - recv_size < each_recv_size:
            data = sock.recv(total_size - recv_size)
        else:
            data = sock.recv(each_recv_size)
        recv_size += len(data)
        recv_percent = int(100 * (recv_size / total_size))  # Receive the percent
        progress(recv_percent, width=30)  # The width of the progress bar is 30
        f.write(data)
    print()
    f.close()