图片验证以及Django-redis 缓存

一、django缓存设置

1、安装django缓存模块

pip install django-redis==4.12.1

2、settings.py中配置缓存

# --------------------------  图片 配置 ---------------------------
# 缓存配置
CACHES = {
    # django存缓默认位置,redis 0号库
    # default: 连接名称
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379/0",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
        }
    },
    # django session存 reidis 1 号库（现在基本不需要使⽤）
    "session": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379/1",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
        }
    },
    # 图形验证码，存redis 2号库
    "img_code": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379/2",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
        }
    }
}
# 配置session使⽤redis存储
SESSION_ENGINE = "django.contrib.sessions.backends.cache"
# 配置session存储的位置: 使⽤cache中的
SESSION_CACHE_ALIAS = "session"

二、新建应⽤verifications

• 图形验证码
• 短信验证码
• 邮件验证

'''2.1 在apps⽂件夹下新建应⽤： verifications'''
python ../manage.py startapp verifications # 切换到apps⽂件夹下执⾏创建命令

'''2.2 在syl/settings.py中添加应⽤'''
INSTALLED_APPS = [
 	'verifications.apps.VerificationsConfig',
]

'''2.3 在syl/urls.py主路由中添加'''
path('verify/', include('verifications.urls'))

'''2.4 添加⼦路由： verifications/urls.py'''
from django.urls import path
from . import views
urlpatterns = [
 	# path('image_codes/', views.ImageCodeView.as_view())
]

三、图形验证码

1、使用第三方包captcha

1.下载captcha压缩包captcha.zip，放到项⽬packages⽂件夹下
2.解压captcha.zip放到syl/libs⽂件夹下
3.解压⽂件中的syl/libs/captcha/captcha.py 右键运⾏即可⽣成图⽚验证码unzip xxx.zip

2、在verifications/views.py中使⽤

from libs.captcha.captcha import captcha
from django.shortcuts import render
from django.http.response import HttpResponse
from django_redis import get_redis_connection
import random
from rest_framework.views import APIView
from rest_framework.response import Response
from userapp.models import *


# Create your views here.

class ImageCodeView(APIView):
    def get(self, request):
        # 获取uuid数据数据
        uuid = request.query_params.get("uuid")

        # 判断uuid 是否存在
        if not uuid:
            return Response({"code": 4005, "msg": "参数不完整"})

        # 调用captche包来生成图片
        text, image = captcha.generate_captcha()

        # 把对应的图片存到redis里面
        redis_client = get_redis_connection("img_code")

        redis_client.setex(uuid, 60 * 60, text)

        # 指明返回数据的类型
        return HttpResponse(image, content_type="image/jpg")

接口测试

http://127.0.0.1:8000/verify/image_codes/?uuid=9b4381ed-06da-4ff6-ab56-56fbcbec5ef2