python2.7實(shí)現(xiàn)郵件發(fā)送功能-創(chuàng)新互聯(lián)

要想實(shí)現(xiàn)一個(gè)能夠發(fā)送帶有文本、圖片、附件的python程序,首先要熟悉兩大模塊:

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email以及smtplib

然后對(duì)于MIME(郵件擴(kuò)展)要有一定認(rèn)知,因?yàn)橛辛藬U(kuò)展才能發(fā)送附件以及圖片這些媒體或者非文本信息

最后一個(gè)比較細(xì)節(jié)的方法就是MIMEMultipart,要理解其用法以及對(duì)應(yīng)參數(shù)所實(shí)現(xiàn)的功能區(qū)別

發(fā)送郵件三部曲:

創(chuàng)建協(xié)議對(duì)象
連接郵件服務(wù)器
登陸并發(fā)送郵件

from email.header import Header
from email.mime.base import MIMEBase
from email.mime.text import MIMEText
import mimetypes

from email.mime.multipart import MIMEMultipart
import os
import smtplib

from email import Encoders as email_encoders


class Message(object):
 def __init__(self, from_addr, to_addr, subject="", html="", text=None, cc_addr=[], attachment=[]):

  self.from_addr = from_addr
  self.subject = subject

  if to_addr:
   if isinstance(to_addr, list):
    self.to_addr = to_addr
   else:
    self.to_addr = [d for d in to_addr.split(',')]
  else:
   self.to_addr = []

  if cc_addr:
   if isinstance(cc_addr, list):
    self.cc_addr = cc_addr
   else:
    self.cc_addr = [d for d in cc_addr.split(',')]
  else:
   self.cc_addr = []

  if html is not None:
   self.body = html
   self.body_type = "html"
  else:
   self.body = text
   self.body_type = "plain"

  self.parts = []
  if isinstance(attachment, list):
   for file in attachment:
    self.add_attachment(file)

 def add_attachment(self, file_path, mimetype=None):
  """
   If *mimetype* is not specified an attempt to guess it is made. If nothing
   is guessed then `application/octet-stream` is used.
  """
  if not mimetype:
   mimetype, _ = mimetypes.guess_type(file_path)

  if mimetype is None:
   mimetype = 'application/octet-stream'

  type_maj, type_min = mimetype.split('/')
  with open(file_path, 'rb') as fh:
   part_data = fh.read()

   part = MIMEBase(type_maj, type_min)
   part.set_payload(part_data)
   email_encoders.encode_base64(part)

   part_filename = os.path.basename(file_path)
   part.add_header('Content-Disposition', 'attachment; filename="%s"'
       % part_filename)
   part.add_header('Content-ID', part_filename)

   self.parts.append(part)

 def __to_mime_message(self):
  """Returns the message as
  :py:class:`email.mime.multipart.MIMEMultipart`."""

  ## To get the message work in iOS, you need use multipart/related, not the multipart/alternative
  msg = MIMEMultipart('related')
  msg['Subject'] = self.subject
  msg['From'] = self.from_addr
  msg['To'] = ','.join(self.to_addr)

  if len(self.cc_addr) > 0:
   msg['CC'] = ','.join(self.cc_addr)

  body = MIMEText(self.body, self.body_type)
  msg.attach(body)

  # Add Attachment
  for part in self.parts:
   msg.attach(part)

  return msg

 def send(self, smtp_server='localhost'):

  smtp = smtplib.SMTP()
  smtp.connect(smtp_server)
  smtp.sendmail(from_addr=self.from_addr, to_addrs=self.to_addr + self.cc_addr, msg=self.__to_mime_message().as_string())
  smtp.close()

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