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,socketimport jiexiliuhuiCONST_BUFFER_SIZE = 81920filepath = '/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 Truedef 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 Truedef list(ftp):    ftp.dir()def find(ftp,filename):    ftp_f_list = ftp.nlst()    if filename in ftp_f_list:        return True    else:        return Falsedef 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__