Python 实现js与Django后台的前后台交互

背景：

python小白准备用python写个后台项目，前后台交互的时间遇到一些问题，记录如下：

代码结构：

目录结构：

前台请求：

urls.py中配置：

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^login/', views.login),
    url(r'^regist_url/', views.regist_url),
]

在views.py中定义regist_url方法：

def regist_url(request):
    data = json.loads(request.body)
    username = data["username"]
    password = data["password"]
    print "用户名："+username
    print "密码："+password
    return HttpResponse(request.body)

启动项目，执行/regist_url/请求。

后台打印：

同时return HttpResponse(request.body)返回到前台，前台打印：

这样，前后台交互就好了！

注意：

1.Django对Post请求有中间件防御机制csrf，会出现403 Forbidden错误

有两种解决方法：

（1）：直接在settings.py中将django.middleware.csrf.CsrfViewMiddleware全局注释,

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    #'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

（2）.或者对views.py的方法上新增@csrf_exempt注解，去除csrf防御

from django.views.decorators.csrf import csrf_exempt

@csrf_exempt
def regist_url(request):
    data = json.loads(request.body)
    username = data["username"]
    password = data["password"]
    print "用户名："+username
    print "密码："+password
    return HttpResponse(request.body)

2.请求报错

RuntimeError: You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH set. Django can't redirect to the slash URL while maintaining POST data. Change your form to point to 127.0.0.1:8000/regist_url/ (note the trailing slash), or set APPEND_SLASH=False in your Django settings.

将改为，加上“/”