品牌商城网站制作公司,云南省做网站开发的公司排名,大站wordpress,网站建设视频教程网站环境#xff1a;win11、python 3.9.2、django 4.2.11、celery 4.4.7、MySQL 8.1、redis 3.0
背景#xff1a;基于django框架的大量任务实现#xff0c;并且需要保存数据库
时间#xff1a;20240409
说明#xff1a;异步爬取小说#xff0c;并将其保存到数据库
1、创建…环境win11、python 3.9.2、django 4.2.11、celery 4.4.7、MySQL 8.1、redis 3.0
背景基于django框架的大量任务实现并且需要保存数据库
时间20240409
说明异步爬取小说并将其保存到数据库
1、创建django项目并创建app测试调通
# 创建目录GetFiction
pip install django4.2.11 pymysql-1.1.0
django-admin startproject getfiction .
django-admin startapp getsection
配置MySQL连接、应用注册、日志、其他配置
# getfiction/__init__.py filepathimport pymysqlpymysql.install_as_MySQLdb()# getfiction/settings.py filepath# 数据库连接DATABASES {default: {ENGINE: django.db.backends.mysql,NAME: fictions,USER: ****,PASSWORD: ****,HOST: 127.0.0.1,PORT: 3306,}
}# 应用注册INSTALLED_APPS [django.contrib.admin,django.contrib.auth,django.contrib.contenttypes,django.contrib.sessions,django.contrib.messages,django.contrib.staticfiles,getsection,
]# 其他配置LANGUAGE_CODE zh-HansTIME_ZONE Asia/Shanghai# 日志配置import logging# 创建日志器
logger logging.getLogger(test)
# 为日志器设置日志等级如果这里不设置将会使用其父级日志器的等日志等级
# 这里它的父日志器是rootroot的默认日志级别是 logging.WARNING
logger.setLevel(logging.INFO)# 创建文件处理程序
fh logging.FileHandler(filename./test.log,encodingutf8)
# 创建流处理程序
sh logging.StreamHandler()# 为文件处理程序设置日志等级
fh.setLevel(logging.ERROR)
# 为流处理程序设置日志等级
sh.setLevel(logging.DEBUG)# 创建格式化程序
ffmt logging.Formatter(fmt %(asctime)s - %(levelname)s - %(name)s - %(filename)s:%(lineno)d - %(message)s,datefmt %Y/%m/%d %H:%M:%S
)
# 创建格式化程序
sfmt logging.Formatter(fmt %(asctime)s - %(levelname)s - %(name)s - %(filename)s:%(lineno)d - %(message)s,
)# 将 ffmt 格式化程序应用到 fh 文件处理程序
fh.setFormatter(ffmt)
# 将 sfmt 格式化程序应用到 sh 流处理程序
sh.setFormatter(sfmt)# 将文件处理程序应用到logger日志器
logger.addHandler(fh)
# 将流处理程序应用到logger日志器
logger.addHandler(sh) 配置首页的路由以及视图函数
# getfiction/urls.pyfrom getsection.views import indexurlpatterns [path(admin/, admin.site.urls),path(, index),
]# getsection/views.pyfrom django.shortcuts import HttpResponsedef index(request):# 测试首页return HttpResponse(str(hello))
调试postman或是浏览器都行
python manage.py runserver 0.0.0.0:8000
postman测试结果如下 2、django中集成celery异步处理任务并将任务存储到MySQL
celery配置broker使用redisbackend使用django自带的ORM并注册celery相关应用
# getfiction/celery.pyfrom __future__ import absolute_import, unicode_literals
from celery import Celery
import osos.environ.setdefault(DJANGO_SETTINGS_MODULE, getfiction.settings) # 设置django环境
app Celery(djcelery, brokerredis://127.0.0.1:6379/0, backenddjango-db)
app.autodiscover_tasks() # 发现任务文件每个app下的task.py# getfiction/__init__.pyfrom __future__ import absolute_import, unicode_literals
from .celery import app as celery_app
import pymysql__all__ [celery_app]
pymysql.install_as_MySQLdb()# getfiction/settings.pyINSTALLED_APPS [django.contrib.admin,django.contrib.auth,django.contrib.contenttypes,django.contrib.sessions,django.contrib.messages,django.contrib.staticfiles,django_celery_results,getsection,djcelery,
]
安装redis并启动Release 3.0.504 · microsoftarchive/redis (github.com)
安装redis、eventlet模块pip install redis eventlet 安装celery相关模块
pip install celery django-celery django-celery-results
启动测试报错 1、cannot import name ugettext_lazy from django.utils.translation “ugettext_lazy”已被 Django 3 弃用所以需要修改django的源码如下 将ugettext_lazy使用gettext_lazy替代修改如下
# from django.utils.translation import ugettext_lazy as _
from django.utils.translation import gettext_lazy as _重启项目继续测试 2、ModuleNotFoundError: No module named celery.five 版本不兼容将celery的版本降到 4.4.7
pip install celery4.4.7
重启项目继续测试 3、cannot import name force_unicode from django.utils.encoding 处理方式同上述1 将 force_unicode替换为 force_str
# from django.utils.encoding import force_unicode as force_text # noqa
from django.utils.encoding import force_str as force_text # noqa
重启继续 4、except self._encode_error, exc: anyjson不兼容python3所以产生报错下面会连续修改该模块相关源码如下 # GetFiction\venv\lib\site-packages\anyjson\__init__.py88 except self._encode_error as exc:
89 raise (TypeError, TypeError(*exc.args), sys.exc_info()[2])100 except self._decode_error as exc:
101 raise (ValueError, ValueError(*exc.args), sys.exc_info()[2])120 print(Running anyjson as a stand alone script is not supported)67 if isinstance(modinfo[encerror], str):
69 if isinstance(modinfo[encerror], str): 5、from django.utils.translation import ugettext_lazy as _ 错误同 1 6、from django.utils.translation import ungettext, ugettext as _ 与1类似 from django.utils.translation import gettext, gettext as _
# from django.utils.translation import ungettext, ugettext as _ 7、cannot import name force_unicode from django.utils.encoding
# venv/Lib/site-packages/djcelery/admin.py
from django.utils.encoding import force_str as force_text # noqa至此修改源码部分完成
3、添加任务执行写入到数据库 数据库迁移
python manage.py makemigrations #生成迁移文件
python manage.py migrate #执行迁移生成数据表创建发送任务视图函数
# getsection/views.pyfrom django.shortcuts import HttpResponse
from getfiction.settings import logger
from getsection.tasks import getfictioninfo
from playwright.sync_api import sync_playwrightdef index(request):with sync_playwright() as p:browser p.chromium.launch()page browser.new_page()base_url https://www.83ks.org# https://www.83ks.org/read/196719/2535054.html 某一章的内容page.goto(f{base_url}/book/196719/)element_href page.query_selector_all(#list dl a)novel_href_dic {}if element_href:for i in element_href[:5]:c [i.get_attribute(href)] i.get_attribute(title).split( )[:0:-1]if len(c) 3:logger.error(str(c) 该章节存在错误)elif len(c) 4:c.remove(lwxs.com)novel_href_dic[c[-1]] c[:2]else:novel_href_dic[c[-1]] c[:2]browser.close()for secindex, url_and_secname in novel_href_dic.items():getfictioninfo.delay(secindex, url_and_secname)return HttpResponse(OK) 安装playwright模块pip install playwright
# getsection/tasks.pyfrom __future__ import absolute_import
from celery import shared_task
from playwright.sync_api import sync_playwright
from getfiction.settings import loggershared_task
def getfictioninfo(secindex, url_and_secname):# 第68章 [/read/196719/1660838.html, 势不可挡]with sync_playwright() as p:browser p.chromium.launch()section_page browser.new_page()section_url https://www.83ks.org url_and_secname[0]try:section_page.goto(section_url)except Exception as e:logger.error(str(secindex) str(e))section_page_element section_page.query_selector_all(#content p)section_name secindex url_and_secname[1] \nlogger.info(section_name)for i in section_page_element:section_name i.inner_text() return section_name启动celerycelery -A getfiction worker -l info -P eventlet
启动djangopython manage.py runserver 0.0.0.0:8000
访问首页进行测试 数据存储如下 django_celery_results_taskresult 存在的问题版本存在不兼容的问题尚需优化
