Django—Ajax

Ajax-get

url

    url(r'^ajax_add/', views.ajax_add),

    url(r'^ajax_demo1/', views.ajax_demo1),

视图

def ajax_demo1(request):

    return render(request, "ajax_demo1.html")

def ajax_add(request):

    i1 = int(request.GET.get("i1"))

    i2 = int(request.GET.get("i2"))

    ret = i1 + i2

    return JsonResponse(ret, safe=False)

html

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="UTF-8">

  <meta http-equiv="x-ua-compatible" content="IE=edge">

  <meta name="viewport" content="width=device-width, initial-scale=1">

  <title>AJAX局部刷新实例</title>

</head>

<body>

<input type="text" id="i1">+

<input type="text" id="i2">=

<input type="text" id="i3">

<input type="button" value="AJAX提交" id="b1">

<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>

<script>

  $("#b1").on("click", function () {

    $.ajax({

      url:"/ajax_add/",

      type:"GET",

      data:{"i1":$("#i1").val(),"i2":$("#i2").val()},

      success:function (data) {

        $("#i3").val(data);

      }

    })

  })

</script>

</body>

</html>

Ajax-post

html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>测试AJAX的data参数</title>

</head>

<body>

<button id="b1">点我</button>

<input type="text" id="i1">

<span></span>

<hr>

<div>111</div>

<div>222</div>

<div>333</div>

<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>

<script src="/static/setupAjax.js"></script>

<script>

    $("#b1").click(function () {

        // 先根据name 找到那个隐藏的input标签

        var csrfToken = $("[name='csrfmiddlewaretoken']").val();

        // 给/oo/发送AJAX请求

        $.ajax({

            url: '/oo/',

            type: 'POST',

            data: {

                "name": "alex",

                "hobby": JSON.stringify(["抽烟", "喝酒", "吹牛逼"]),

                // "csrfmiddlewaretoken": csrfToken

            },

            success:function (res) {

                console.log(res);

                // 反序列化

                // var ret = JSON.parse(res);  如果后端使用JsonResponse 返回响应，前端JS就不需要再反序列化

                if (res.code !== 0){

                    console.log(res.err);

                } else {

                    console.log(res.msg);

                }

            }

        })

    });

    var $i1 = $("#i1");

    // 给 i1 标签绑定一个失去焦点的事件

    $i1.on("input", function () {

        // this  --> 触发当前事件的DOM对象

        // 1. 取到用户输入的用户名

        var username = $(this).val();

        var _this = this;

        // 2. 发送到后端

        $.ajax({

            url: '/check/',

            type: 'get',

            data: {"username": username},

            success:function (res) {

                console.log(res);

                if (res.code !== 0){

                    // 表示用户名已经存在

                    $(_this).next().text(res.msg).css("color", "red")

                }

            }

        })

        // 3. 根据响应的结果做操作

    });

    // 给 i1 标签绑定一个获取焦点的事件

    $i1.focus(function () {

        $(this).next().text("");

    })

</script>

</body>

</html>

要引入的文件

/*

* 此文件一用于判断 ajax请求是不是非安全请求，如果是就在请求头中设置csrf_token

* */

// 定义一个从Cookie中根据name取值的方法

function getCookie(name) {

    var cookieValue = null;

    if (document.cookie && document.cookie !== '') {

        var cookies = document.cookie.split(';');

        for (var i = 0; i < cookies.length; i++) {

            var cookie = jQuery.trim(cookies[i]);

            // Does this cookie string begin with the name we want?

            if (cookie.substring(0, name.length + 1) === (name + '=')) {

                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));

                break;

            }

        }

    }

    return cookieValue;

}

// 调用上面的方法，从cookie中取出csrftoken对应的值

var csrftoken = getCookie('csrftoken');

//

function csrfSafeMethod(method) {

  // these HTTP methods do not require CSRF protection

  return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));

}

$.ajaxSetup({

  beforeSend: function (xhr, settings) {

    if (!csrfSafeMethod(settings.type) && !this.crossDomain) {

      xhr.setRequestHeader("X-CSRFToken", csrftoken);

    }

  }

});

js文件

Ajax-post-upload

html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>上传文件</title>

</head>

<body>

<form action="/upload/" method="post" enctype="multipart/form-data">

    {% csrf_token %}

    <input type="file" name="file" id="f1">

    <input type="submit" value="提交">

    <button id="b1" type="button">点我</button>

</form>

<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>

<script src="/static/setupAjax.js"></script>

<script>

    $("#b1").click(function () {

        // 创建一个FormData对象

        var obj = new FormData();

        // 将要上传的文件数据添加到对象中

        obj.append("file", document.getElementById("f1").files[0]);

        obj.append("name", "alex");

        $.ajax({

            url: "/upload/",

            type: "post",

            processData: false,  // 不让jQuery处理我的obj

            contentType: false,  // 不让jQuery设置请求的内容类型

            data: obj,

            success:function (res) {

                console.log(res);

            }

        })

    })

</script>

</body>

</html>

视图

# 上传文件测试

def upload(request):

    if request.method == "POST":

        # 从请求中取上传的文件数据

        file_obj = request.FILES.get("file")

        filename = file_obj.name

        with open(filename, "wb") as f:

            for chunk in file_obj.chunks():

                f.write(chunk)

    return render(request, "upload.html")

巴特西

Django—Ajax

Ajax-get

Ajax-post

Ajax-post-upload

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