智一面的面试题提供python的测试题
使用地址：http://mrw.so/6ce7WT
FTP 客户端
通过 ftplib 模块操作 ftp 服务器，进行上传下载等操作。
# -*- coding: utf-8 -*-
from ftplib import FTP
from os import path
import copy
class FTPClient:
def __init__(self, host, user, passwd, port=21):
self.host = host
self.user = user
self.passwd = passwd
self.port = port
self.res = {'status': True, 'msg': None}
self._ftp = None
self._login()
def _login(self):
'''
登录FTP服务器
:return: 连接或登录出现异常时返回错误信息
'''
try:
self._ftp = FTP()
self._ftp.connect(self.host, self.port, timeout=30)
self._ftp.login(self.user, self.passwd)
except Exception as e:
return e
def upload(self, localpath, remotepath=None):
'''
上传ftp文件
:param localpath: local file path
:param remotepath: remote file path
:return:
'''
if not localpath: return 'Please select a local file. '
# 读取本地文件
# fp = open(localpath, 'rb')
# 如果未传递远程文件路径，则上传到当前目录，文件名称同本地文件
if not remotepath:
remotepath = path.basename(localpath)
# 上传文件
self._ftp.storbinary('STOR ' + remotepath, localpath)
# fp.close()
def download(self, remotepath, localpath=None):
'''
localpath
:param localpath: local file path
:param remotepath: remote file path
:return:
'''
if not remotepath: return 'Please select a remote file. '
# 如果未传递本地文件路径，则下载到当前目录，文件名称同远程文件
if not localpath:
localpath = path.basename(remotepath)
# 如果localpath是目录的话就和remotepath的basename拼接
if path.isdir(localpath):
localpath = path.join(localpath, path.basename(remotepath))
# 写入本地文件
fp = open(localpath, 'wb')
# 下载文件
self._ftp.retrbinary('RETR ' + remotepath, fp.write)
fp.close()
def nlst(self, dir='/'):
'''
查看目录下的内容
:return: 以列表形式返回目录下的所有内容
'''
files_list = self._ftp.nlst(dir)
return files_list
def rmd(self, dir=None):
'''
删除目录
:param dir: 目录名称
:return: 执行结果
'''
if not dir: return 'Please input dirname'
res = copy.deepcopy(self.res)
try:
del_d = self._ftp.rmd(dir)
res['msg'] = del_d
except Exception as e:
res['status'] = False
res['msg'] = str(e)
return res
def mkd(self, dir=None):
'''
创建目录
:param dir: 目录名称
:return: 执行结果
'''
if not dir: return 'Please input dirname'
res = copy.deepcopy(self.res)
try:
mkd_d = self._ftp.mkd(dir)
res['msg'] = mkd_d
except Exception as e:
res['status'] = False
res['msg'] = str(e)
return res
def del_file(self, filename=None):
'''
删除文件
:param filename: 文件名称
:return: 执行结果
'''
if not filename: return 'Please input filename'
res = copy.deepcopy(self.res)
try:
del_f = self._ftp.delete(filename)
res['msg'] = del_f
except Exception as e:
res['status'] = False
res['msg'] = str(e)
return res
def get_file_size(self, filenames=[]):
'''
获取文件大小,单位是字节
判断文件类型
:param filename: 文件名称
:return: 执行结果
'''
if not filenames: return {'msg': 'This is an empty directory'}
res_l = []
for file in filenames:
res_d = {}
# 如果是目录或者文件不存在就会报错
try:
size = self._ftp.size(file)
type = 'f'
except:
# 如果是路径的话size显示 - , file末尾加/ （/dir/）
size = '-'
type = 'd'
file = file + '/'
res_d['filename'] = file
res_d['size'] = size
res_d['type'] = type
res_l.append(res_d)
return res_l
def rename(self, old_name=None, new_name=None):
'''
重命名
:param old_name: 旧的文件或者目录名称
:param new_name: 新的文件或者目录名称
:return: 执行结果
'''
if not old_name or not new_name: return 'Please input old_name and new_name'
res = copy.deepcopy(self.res)
try:
rename_f = self._ftp.rename(old_name, new_name)
res['msg'] = rename_f
except Exception as e:
res['status'] = False
res['msg'] = str(e)
return res
def close(self):
'''
退出ftp连接
:return:
'''
try:
# 向服务器发送quit命令
self._ftp.quit()
except Exception:
return 'No response from server'
finally:
# 客户端单方面关闭连接
self._ftp.close()
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