flask发邮件遇到的两个问题及解决方案

最新推荐文章于 2024-06-23 11:27:29 发布

原创最新推荐文章于 2024-06-23 11:27:29 发布 · 758 阅读

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本文介绍了一种使用Python和Flask实现的邮件发送服务，解决了多收件人接收和部分邮件服务器接收异常的问题。通过调整代码，实现了正确处理多个收件人和改进消息类型以确保所有附件正确发送。

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一开始写的代码

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from flask import Flask, request

MAIL_SERVER = 'smtp.163.com'
MAIL_USERNAME = 'my@163.com'
MAIL_PASSWORD = 'mypassword'
MAIL_PORT = 25
MAIL_NAME = '冰风漫天'
MAIL_ADDRESS = 'my@163.com'

def send_mail(subject, msg, receivers, cc=None, files=None):
    message = MIMEMultipart('alternative')
    mail_from = '{}<{}>'.format(MAIL_NAME, MAIL_ADDRESS)
    message['From'] = mail_from
    if cc:
        cc = set(cc)
        message['Cc'] = ','.join(cc)
    message['To'] = ','.join(receivers)
    message['Subject'] = subject
    message.attach(MIMEText(msg, 'plain', 'utf-8'))
    if MAIL_PORT == 25:
        smtp_obj = smtplib.SMTP()
    else:
        smtp_obj = smtplib.SMTP_SSL()
    if files:
        for file in files.values():
            msg_file = MIMEText(file.stream.read(), 'base64', 'utf8')
            msg_file.add_header('content-disposition', 'attachment', filename=file.filename)
            message.attach(msg_file)
    smtp_obj.connect(MAIL_SERVER)
    smtp_obj.login(MAIL_USERNAME, MAIL_PASSWORD)
    smtp_obj.sendmail(mail_from, receivers, message.as_string())


app = Flask(__name__)

@app.route('/', methods=['POST'])
def index():
    subject = request.form.get('subject')
    msg = request.form.get('msg')
    receivers = request.form.get('receivers')
    send_mail(subject, msg, receivers, files=request.files)
    return '1'

app.run()

请求方式

import requests
requests.post("http://127.0.0.1:5000/",data={"subject":u"发个邮件2","msg":"qweasd","receivers":["youmail@163.com"]},files={'file1':('filename1.txt','文件内容1'),'file2':('filename2.txt','file data2')})

存在两个问题：
1.当收件人有多个时，只有一个人能收到
2.部分邮件服务器上接收邮件不正常

解决方案：
问题1：把receivers = request.form.get(‘receivers’)改成receivers = request.form.getlist(‘receivers’)
问题2：把message = MIMEMultipart(‘alternative’)改成message = MIMEMultipart(‘mixed’)

最后的代码如下：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from flask import Flask, request

MAIL_SERVER = 'smtp.163.com'
MAIL_USERNAME = 'my@163.com'
MAIL_PASSWORD = 'mypassword'
MAIL_PORT = 25
MAIL_NAME = '冰风漫天'
MAIL_ADDRESS = 'my@163.com'

def send_mail(subject, msg, receivers, cc=None, files=None):
    message = MIMEMultipart('mixed')
    mail_from = '{}<{}>'.format(MAIL_NAME, MAIL_ADDRESS)
    message['From'] = mail_from
    if cc:
        cc = set(cc)
        message['Cc'] = ','.join(cc)
    message['To'] = ','.join(receivers)
    message['Subject'] = subject
    message.attach(MIMEText(msg, 'plain', 'utf-8'))
    if MAIL_PORT == 25:
        smtp_obj = smtplib.SMTP()
    else:
        smtp_obj = smtplib.SMTP_SSL()
    if files:
        for file in files.values():
            msg_file = MIMEText(file.stream.read(), 'base64', 'utf8')
            msg_file.add_header('content-disposition', 'attachment', filename=file.filename)
            message.attach(msg_file)
    smtp_obj.connect(MAIL_SERVER)
    smtp_obj.login(MAIL_USERNAME, MAIL_PASSWORD)
    smtp_obj.sendmail(mail_from, receivers, message.as_string())


app = Flask(__name__)

@app.route('/', methods=['POST'])
def index():
    subject = request.form.get('subject')
    msg = request.form.get('msg')
    receivers = request.form.getlist('receivers')
    send_mail(subject, msg, receivers, files=request.files)
    return '1'

app.run()