ajax基本操作

基本操作:

1在项目s13day18_django的settings配置中，指定jquery的目录，同时注释掉CSRF

STATIC_URL = '/static/'
STATICFILES_DIRS = (
    os.path.join(BASE_DIR,'static'),
)

# 'django.middleware.csrf.CsrfViewMiddleware',

2在app01下面，指定路由关系

urlpatterns = [
    # url(r'^index/(d+)/', views.index),
    # url(r'^detail/(d+)/',views.detail),
    # url(r'^template/',views.template),
    url(r'^extend/',views.extend),
    url(r'^assets/',views.assets),
    url(r'^userinfo/',views.userinfo),
    url(r'^ajax_demo/',views.ajax_demo),
]

3在app01下面，定义ajax_demo函数

def ajax_demo(request):
    if request.method == 'POST':
        user = request.POST.get('user')
        pwd = request.POST.get('pwd')
        print(user,pwd)
        if user == '111' and pwd == '222':
            return HttpResponse('1')
        else:
            return HttpResponse('2')
    return render(request,'ajax_demo.html')

4 在templates中，添加关于ajax_demo的HTML信息

<body>
    <div>
        <p>用户名: <input type="text" id="username" /></p>
    </div>
    <div>
        <p>密码: <input type="password" id="pwd" /></p>
    </div>
    <input type="button" value="提交" onclick="SubmitForm();"/>

    <script src="/static/jquery-1.12.4.js"></script>
    <script>
        function SubmitForm(){
            $.ajax({
                url:'/web/ajax_demo/',
                type:'POST',
                data:{'user':$('#username').val(),'pwd':$('#pwd').val()},
                success:function(data){
                    if(data == '1'){
                        location.href="http://www.baidu.com";
                    }
                    else{
                        alert("用户名或密码错误")
                    }
                }
            })
        }
    </script>
</body>

过程流程:整个执行的过程是，ajax传递参数给了函数ajax_demo，函数获取到用户键入的值，然后通过HttpResponse返回给回调函数success，回调函数再执行相应的操作。

二但是在实际的使用中，我们要这么定义views.py

import json
def ajax_demo(request):
    if request.method == 'POST':
        ret = {'status':False,'message':''}
        user = request.POST.get('user')
        pwd = request.POST.get('pwd')
        print(user,pwd)
        if user == '111' and pwd == '222':
            ret['status'] = True
            return HttpResponse(json.dumps(ret))
        else:
            ret['message'] = '用户名或密码错误'
            return HttpResponse(json.dumps(ret))
    return render(request,'ajax_demo.html')

　　ajax_demo.html

<body>
    <div>
        <p>用户名: <input type="text" id="username" /></p>
    </div>
    <div>
        <p>密码: <input type="password" id="pwd" /></p>
    </div>
    <input type="button" value="提交" onclick="SubmitForm();"/>

    <script src="/static/jquery-1.12.4.js"></script>
    <script>
        function SubmitForm(){
            $.ajax({
                url:'/web/ajax_demo/',
                type:'POST',
                data:{'user':$('#username').val(),'pwd':$('#pwd').val()},
                dataType:'json',
                success:function(data){
                    if(data.status){
                        location.href="http://www.baidu.com";
                    }
                    else{
                        alert(data.message)
                    }
                }
            })
        }
    </script>
</body>