图片验证接口

django的六种缓存（mysql+redis） ：https://www.cnblogs.com/xiaonq/p/7978402.html#i6

pip install django-redis==4.12.1

# 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配置
SESSION_CACHE_ALIAS = "session"

‘‘‘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
3.图形验证码captcha使用
4.在verifications/views.py中使用
‘‘‘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())
]

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

from django.http import HttpResponse, HttpResponseForbidden
from django.views import View
from django_redis import get_redis_connection
from libs.captcha.captcha import captcha
class ImageCodeView(View):
def get(self, request):
# 1.接收数据
uuid = request.GET.get(‘uuid‘)
# 2.校验数据
if not uuid:
return HttpResponseForbidden(‘uuid无效‘)
# 3.处理业务
# 获取图片文本内容和图片二进制代码
text, image = captcha.generate_captcha()
# 4.把uuid和图片文本存入redis
redis_client = get_redis_connection(‘img_code‘) # 获取redis客户端
# 5.写入redis(是字符串)
redis_client.setex(uuid, 60 * 5, text)
# 6.返回响应图片
return HttpResponse(image, content_type=‘image/jpg‘)

http://192.168.56.100:8888/verify/image_codes/?uuid=66ea64aa-fbe6-11ea-a3d3-
005056c00008

127.0.0.1:6379># select 2
OK
127.0.0.1:6379[2]># keys *
1) "66ea64aa-fbe6-11ea-a3d3-005056c00008"
127.0.0.1:6379[2]># get 66ea64aa-fbe6-11ea-a3d3-005056c00008
"JEZ6"