项目需求：
1.用域名8000向8001发送请求，用django框架解决跨域问题
2.用上自定义中间件配置，支持get、post、put、detele和非简单请求
3.支持版本控制
4.在setting中配置白名单列表，在表中域名可以访问，否则返回错误信息
# 首先8000端口url层设置路由
from django.conf.urls import url
from django.contrib import admin
from app import views urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^index/', views.test),
]
#写test视图函数
from django.views.decorators.cache import cache_page
import time
from rest_framework.response import Response
# 单页面缓存10秒
# @cache_page(10)
def test(request):
print('三儿来了！')
ctime = time.time() return render(request,'index.html',locals())
# 模板层写index模板（这里用到ajax向后台提交数据，需要引入bootstop且在setting中配置）
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="/static/jquery-3.3.1.js"></script>
<title>Title</title>
</head>
<body>
不缓存
{{ ctime }}
<br>
存在的缓存
{#{% load cache %}#}
{#第一个是超时时间，缓存时间。第二个参数是Key值，别名。#}
{#{% cache 10 'test' %}#}
{# {{ ctime }}#}
{#{% endcache %}#}
<button id="btn">点我发请求</button> </body>
<script>
$("#btn").click(function () {
$.ajax({
url: 'http://127.0.0.1:8001/v1/publishs/',
{#type: 'get',#}
type:'post',
{#type:'put',#}
contentType:'application/json',
{#data:JSON.stringify({'name':'egon'}),#}
success: function (data) {
console.log(data)
}
})
}) </script>
</html>
# ajax提交的路由请求http://127.0.0.1:8001/v1/publishs/
# 由于请求的是V1版本，我们在端口8001路由层中设置版本路由
from django.conf.urls import url
from django.contrib import admin
from app import views
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^(?P<version>[v1|v2]+)/publishs/', views.PublishView.as_view()), ]
# 写对应的的函数视图
from rest_framework.views import APIView
from rest_framework.versioning import URLPathVersioning
from rest_framework.response import Response # 版本控制的局部使用
class PublishView(APIView):
# versioning_class = QueryParameterVersioning # 基于url的get传参方法
versioning_class = URLPathVersioning # 基于url的正则方式 def get(self,request,*args,**kwargs):
print(request.version)
return Response({'status':100}) def post(self,request,*args,**kwargs):
print(request.method)
return Response({'status': 100, 'msg': 'post'}) def delete(self,request,*args,**kwargs):
print(request.method)
return Response({'status':100,'msg':'delete'}) def put(self,request,*args,**kwargs):
print(request.method)
return Response({'status':100,'msg':'put'})
#这个时候写定义中间件
from django.utils.deprecation import MiddlewareMixin
from django.conf import settings
from rest_framework.response import Response
from django.http import JsonResponse class CORSMiddle(MiddlewareMixin):
def process_response(self,request,response):
#
# print(request.META['HTTP_ORIGIN'])
host_list = settings.OPEN_HOST
host = request.META['HTTP_ORIGIN'] response['Access-Control-Allow-Origin'] = host
if request.method == 'OPTIONS':
response['Access-Control-Allow-Methods'] = 'PUT,DELETE,POST,GET'
response['Access-Control-Allow-Headers'] = 'Content-Type' print(host,host_list)
if host not in host_list:
# rep = JsonResponse({'msg':'error 非法访问！'})
rep = Response({'msg':'error 非法访问！'})
rep['Access-Control-Allow-Origin'] = host
return rep
return response
# 自定义中间需要到setting中做配置，且把csrf注销
MIDDLEWARE = [
'django.middleware.security.SecurityMid'
''
'dleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
# 'django.middleware.csrf.CsrfViewMiddleware',
'app.center.CORSMiddle',# 此为自定义中间件
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
# 后面需要在setting中自定义白名单
OPEN_HOST = ['http://127.0.0.1:8002','http://127.0.0.1:8003']