Python_定时自动发送邮件

虽然主流邮箱都可以定时发送邮件，但还是尝试用python写了一个定时发送邮件的脚本，设定好一个发送时间后，可以按下面步骤将文件通过QQ邮箱发送出去。

1. 文件的最后修改及最后访问时间随机调整为发邮件前20~25分钟；
2. 文件超过10M或是一个文件夹时，则自动生成zip压缩包；
3. 通过邮箱自动发送。

有几个点需要特别注意一下:

• 修改文件的时间属性需要用到win32API的SetFileTime，所以需要先安装pywin32模块；
• 因为是通过SMTP服务发送的邮件，需要先在电子邮箱中打开SMTP服务
• 使用SMTP发送邮件需要邮箱地址和授权码，授权码需要在邮箱设置中获取

以下代码:

from win32file import CreateFile, SetFileTime, GetFileTime, CloseHandle
from win32file import GENERIC_READ, GENERIC_WRITE, OPEN_EXISTING
from pywintypes import Time
from threading import Timer
from email.header import Header
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart
import time, os, random, zipfile, smtplib
 
def ModifyFileTime(filePath, lastTime):
    #构造时间
    fh = CreateFile(filePath, GENERIC_READ|GENERIC_WRITE, 0, None, OPEN_EXISTING, 0, 0)
    offsetSec=random.randint(1200, 1500)
    cTime, aTime, wTime = GetFileTime(fh)
    aTime = Time(time.mktime(lastTime) - offsetSec)
    wTime = Time(time.mktime(lastTime) - offsetSec)
    #修改时间属性
    SetFileTime(fh, cTime, aTime, wTime)
    CloseHandle(fh)
 
def GetFilePathList(filePath, result):
    if os.path.isdir(filePath):
        files = os.listdir(filePath)
        for file in files:
            if os.path.isdir(filePath + '/' +file):
                GetFilePathList(filePath + '/' + file, result)
            else:
                result.append(filePath + '/' + file)
    else:
        result.append(filePath)
     
def RunZipFile(filePath):
    #构造压缩包路径
    zipFilePath = os.path.basename(filePath)
    if os.path.isdir(filePath):
        zipFilePath = zipFilePath + '.zip'
    else:
        zipFilePath = os.path.splitext(zipFilePath)[0] + '.zip'
    #文件已存在则删除原有文件
    if os.path.exists(zipFilePath):
        os.remove(zipFilePath)
    #创建压缩包
    zipFileList = []
    GetFilePathList(filePath, zipFileList)
    f = zipfile.ZipFile(zipFilePath, 'w', zipfile.ZIP_DEFLATED)
    for fileP in zipFileList:
        arcName = os.path.basename(fileP)
        if os.path.isdir(filePath):
            dirName = os.path.dirname(fileP)
            arcName = dirName.replace(os.path.dirname(dirName),'') + '/' + arcName
        f.write(fileP, arcName)
    f.close()
    return zipFilePath
 
def SendEmail(filePath):
    #邮件设置
    fromAddr = 'XXXXXXXXX@qq.com'#发件地址
    autho = 'XXXXXXXXXXXXXXXX'#授权码
    smtpServer = 'smtp.qq.com'#smtp服务器
 
    #邮件信息
    toAddr = 'XXXXXXXX@163.com'#收件地址
    title = 'YourTitle'#主题
    text = 'YourText'#正文
    annexPath = filePath#附件路径
 
    #构造邮件
    message = MIMEMultipart()
    message['From'] = fromAddr
    message['To'] = toAddr
    message['Subject'] = Header(title, 'utf-8')
    message.attach(MIMEText(text, 'plain', 'utf-8'))
 
    #构造附件
    annex = MIMEApplication(open(annexPath,'rb').read())
    annex.add_header('Content-Disposition', 'attachment', filename = os.path.basename(annexPath))
    message.attach(annex)
 
    #发送邮件
    server = smtplib.SMTP_SSL(smtpServer, 465)
    server.login(fromAddr, autho)
    server.sendmail(fromAddr, [toAddr], message.as_string())
    server.quit()
 
def PreparingFilesAndSend(filePath, runTime):
    annexPath = filePath
    if os.path.isdir(filePath):
        #遍历文件,修改时间属性
        modFileList = []
        GetFilePathList(filePath, modFileList)
        for fileP in modFileList:
            ModifyFileTime(fileP, runTime)
        #打包
        annexPath = RunZipFile(filePath)
    else:
        #修改时间属性
        ModifyFileTime(filePath, runTime)
        #判断是否需要压缩
        if os.path.getsize(filePath)/float(1024*1024) > 10:
            annexPath = RunZipFile(filePath)
    #发送邮件
    SendEmail(annexPath)
 
def TimedTask(filePath, runTime):
    interval = time.mktime(runTime) - time.mktime(time.localtime())
    Timer(interval, PreparingFilesAndSend, args=(filePath, runTime)).start()
 
fp = r"C:/Users/imfour/Documents/pythonTest/testtxt.txt"
rt = "2019-6-17 02:08:00"
#转化为结构化时间
timeFormat = "%Y-%m-%d %H:%M:%S"
s_time=time.strptime(rt, timeFormat)
 
if __name__ == "__main__":
    TimedTask(fp, s_time)