图片验证码接口

1.django 缓存设置

1.1 安装Django缓存模块

pip install django-redis==4.12.1

1.2 syl/settings.py 中配置缓存

# 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.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()) 
]

3.图形验证码captcha使用

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

4.在verifications/views.py中使用

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')

5.测试验证码接口

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"