使用django + celery + redis 异步发送邮件

参考：http://blog.csdn.net/Ricky110/article/details/77205291

环境:

centos7  +  python3.6.1 + django2.0.1  +  celery4.1.0  +  redis3.2.10

yum  install -y redis

pip3 install redis,celery,django

开始:

创建django工程my_report

创建app celery_test, 如下所示 :

• INSTALLED_APPS中注册app_celery

• setting中celery配置

• # Celery settings
  CELERY_BROKER_URL = 'redis://localhost:6379'
  #: Only add pickle to this list if your broker is secured
  CELERY_ACCEPT_CONTENT = ['json']
  CELERY_RESULT_BACKEND = 'redis://localhost:6379'
  CELERY_TASK_SERIALIZER = 'json'
  CELERY_ENABLE_UTC = True
  CELERY_TIMEZONE = 'Asia/Shanghai'
  

  　　

• setting中mail配置

• EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
  EMAIL_HOST = "smtp.mail.haoyisheng.com"
  EMAIL_HOST_PASSWORD = '******'
  DEFAULT_FROM_EMAIL = EMAIL_HOST_USER = "lijianwei@mail.haoyisheng.com"
  EMAIL_PORT = 25
  EMAIL_USE_TLS = True
  

  　　

• app所在目录添加tasks.py文件(必须是该文件名), 用于处理任务
• 

  from __future__ import absolute_import, unicode_literals
  from celery import shared_task
  from django.core.mail import send_mail
  import logging
  
  logger = logging.getLogger(__name__)
  
  @shared_task
  def celery_send_email(subject, message, from_email, recipient_list, **kwrags):
      try:
          # 使用celery并发处理邮件发送的任务
          logger.info("\n开始发送邮件")
          send_mail(subject, message, from_email, recipient_list, **kwrags)
          logger.info("邮件发送成功")
          return 'success!'
      except Exception as e:
          logger.error("邮件发送失败: {}".format(e))
  

  　　

• 配置目录my_report中添加celery.py文件

• from __future__ import absolute_import, unicode_literals
  import os
  from celery import Celery
  
  # 为celery程序设置DJANGO_SETTINGS_MODULE环境变量
  os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'my_report.settings')
  
  app = Celery('celery_test')
  
  # 从Django的设置文件中导入CELERY设置
  app.config_from_object('django.conf:settings', namespace='CELERY')
  # 从所有已注册的app中加载任务模块
  app.autodiscover_tasks()
  
  @app.task(bind=True)
  def debug_task(self):
      print('Request: {0!r}'.format(self.request))
  

  　　

• 配置目录my_report的__init__.py文件中添加如下

• from __future__ import absolute_import, unicode_literals
  
  # 这将保证celery app总能在django应用启动时启动
  from .celery import app as celery_app
  __all__ = ['celery_app']
  

  　　

编写url映射和视图

from django.contrib import admin
from django.urls import path
from month_report import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('send_email/', views.add_task_to_celery, name='send_email'),
]

　　

编写views：

from django.http import HttpResponse
from celery_test.tasks import celery_send_email

def add_task_to_celery(request):
    celery_send_email.delay(u'邮件主题', 'test_mail_message', 'lijianwei@mail.haoyisheng.com', 
                            ['lijianwei@mail.haoyisheng.com'])
    return HttpResponse('hello world')

　　

• 在manage.py同级目录执行如下命令, 启动celery的worker进程(主要用于消费或执行任务)

celery -A my_report  worker --loglevel=info

执行成功：

• 从客户端请求
• http://ip:port/send_email/
• 然后会收到页面返回hello world, 并且终端显示时间处理结果为成功

然后验证邮箱有收到邮件，成功

温馨提示

• 当前使用方法，如需要在tasks.py中新添加任务，新增后，则需要重启django， 并且需要从起celery worker进程, worker进程默认不能动态加载事件。