Python中的ftplib模块调用与测试

Python中默认安装的ftplib模块定义了FTP类，其中函数有限，可用来实现简单的ftp客户端，用于上传或下载文件

FTP的工作流程及基本操作可参考协议RFC959

ftp登陆连接

from ftplib import FTP #加载ftp模块

ftp=FTP() #设置变量
ftp.set_debuglevel(2) #打开调试级别2，显示详细信息
ftp.connect("IP","port") #连接的ftp sever和端口
ftp.login("user","password")#连接的用户名，密码
print ftp.getwelcome() #打印出欢迎信息
ftp.cmd("xxx/xxx") #更改远程目录
bufsize=1024 #设置的缓冲区大小
filename="filename.txt" #需要下载的文件
file_handle=open(filename,"wb").write #以写模式在本地打开文件
ftp.retrbinaly("RETR filename.txt",file_handle,bufsize) #接收服务器上文件并写入本地文件
ftp.set_debuglevel(0) #关闭调试模式
ftp.quit #退出ftp

ftp相关命令操作

ftp.cwd(pathname) #设置FTP当前操作的路径
ftp.dir() #显示目录下文件信息
ftp.nlst() #获取目录下的文件
ftp.mkd(pathname) #新建远程目录
ftp.pwd() #返回当前所在位置
ftp.rmd(dirname) #删除远程目录
ftp.delete(filename) #删除远程文件
ftp.rename(fromname, toname)#将fromname修改名称为toname。
ftp.storbinaly("STOR filename.txt",file_handel,bufsize) #上传目标文件

ftp.retrbinary("RETR filename.txt",file_handel,bufsize)#下载FTP文件

__author__ = 'Administrator'

import sys,os,ftplib,socket
import jiexiliuhui


CONST_BUFFER_SIZE = 81920
filepath = '/root/water'


def connect(CONST_HOST = "xxx.xxx.xxx.xxx"):
    CONST_USERNAME = "root"
    CONST_PWD = "mima"
    try:
        ftp = ftplib.FTP(CONST_HOST)
        ftp.login(CONST_USERNAME,CONST_PWD)
        return ftp
    except (socket.error,socket.gaierror):
        print("FTP 链接失败，请检查主机是否正常")
        sys.exit(0)

def disconnect(ftp):
    ftp.quit()

def upload(ftp, filepath):
    f = open(filepath, "rb")
    file_name = os.path.split(filepath)[-1]
    try:
        ftp.storbinary('STOR %s'%file_name, f, CONST_BUFFER_SIZE)
    except ftplib.error_perm:
        return False
    return True

def download(ftp, filename):
    f = open(filename,"wb").write
    try:
        ftp.retrbinary("RETR %s"%filename, f, CONST_BUFFER_SIZE)
    except ftplib.error_perm:
        return False
    return True

def list(ftp):
    ftp.dir()

def find(ftp,filename):
    ftp_f_list = ftp.nlst()
    if filename in ftp_f_list:
        return True
    else:
        return False

def main():

    CONST_HOST = input("网关IP地址：")
    ftp = connect(CONST_HOST)
    ftp.cwd(filepath)
    flist =  ftp.nlst(filepath)
    diclist = {}
    print(CONST_HOST," 的流水有：")
    for index,filename in enumerate(flist):
        diclist[index] = filename[-8:]
    print(diclist)
    selectNum = input("请选择文件：")
    try:
        selectNum = int(selectNum)
    except :
        print("请输入合法数字")
    if selectNum>= len(diclist):
        print("请输入有效数字")
    if download(ftp,diclist[selectNum]):
        print("下载文件", diclist[selectNum],"成功")
    else:
        print("下载文件", diclist[1],"失败")
    disconnect(ftp)

    #调用自编函数解析文件并声称excel
    jiexiliuhui.jiexiliushui(diclist[selectNum])

if __name__ == "__main__":
  main()
  content = input("")

  if (content != ""):
     exit

jiexiliuhui.py

__author__ = 'Administrator'

def jiexiliushui(filename):
    """

    :param filename: 待解析的文件名
    :return:
    """
    import time
    import xlwt


    f = open(filename,'rb')
    f.seek(0,0)
    index = 0
    # for i in range(0,16):
    #     print("%-9s"%i, end='')
    # print('')

    #path = input("保存的EXCEL名：")
    path = ''
    if path =="":
        path = time.strftime("%Y%m%d%H%M%S", time.localtime())+'.xls'
    else:
        if path[-4:] != '.xls':
            path = path+'.xls'

    wb=xlwt.Workbook()
    sheet1 = wb.add_sheet("liushui")

    value = ["流水号","表号","度数","功率","时间"]
    for i in range(0,5):
        sheet1.write(0,i,value[i])

    ncols = 0
    while True:
        temp=f.read(32)
        if len(temp) < 32:
            wb.save(path)
            break
        else:
            ncols = ncols+1
            liushuihao = temp[3]*256**3 + temp[2]*256**2 + temp[1]*256 + temp[0]*256**0
            caijishijian = str(temp[5])+"-"+str(temp[6]).zfill(2)+"-"+str(temp[7]).zfill(2)+" "+str(temp[8]).zfill(2)+":"+str(temp[9]).zfill(2)+":"+str(temp[10]).zfill(2)
            biaohao = str(hex(temp[16]))[2:].zfill(2)+str(hex(temp[15]))[2:].zfill(2)+str(hex(temp[14]))[2:].zfill(2)+str(hex(temp[13]))[2:].zfill(2)+str(hex(temp[12]))[2:].zfill(2)+str(hex(temp[11]))[2:].zfill(2)
            if biaohao.isdigit():
                biaohao = int(biaohao)
                if str(hex(temp[18])) == '0xff':
                    dushuo = -1
                    gonglv = -1
                else:
                    dushuo =  int(str(hex(temp[21]))[2:].zfill(2)+str(hex(temp[20]))[2:].zfill(2)+str(hex(temp[19]))[2:].zfill(2)+str(hex(temp[18]))[2:].zfill(2))*0.01
                    if str(hex(temp[24])) == '0xff':
                        gonglv = -1
                    else:
                        gonglv = int(str(hex(temp[24]))[2:].zfill(2)+str(hex(temp[23]))[2:].zfill(2)+str(hex(temp[22]))[2:].zfill(2))*0.0001

               # print("流水号：%d；表号：%d；度数：%8.2f；功率：%6.4f；时间：%s" %(liushuihao,biaohao,dushuo,gonglv,caijishijian))
                value = [liushuihao,biaohao,dushuo,gonglv,caijishijian]
                for i, each in enumerate(value):
                    sheet1.write(ncols,i,each)

    f.close()

def modeName():
    return __name__