使用ajax发送文件的三种方式及预览图片的方法,上传按钮美化

后端代码

def upload(request):

    if request.method == "GET":

        return render(request,'upload.html')

    if request.method =="POST":

        pass

def upload_file(request):

    request.POST.get('username')

    fafafa = request.FILES.get('fileobj')

    img_path = os.path.join('static/img/',fafafa.name)

    with open( img_path, 'wb') as f:

        for item in fafafa.chunks():

            f.write(item)

    ret = {'code':True,'data':img_path}

    return HttpResponse(json.dumps(ret))

views.py

html文件

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <style>

        .c1 {

            position: relative;

            width: 100px;

            height: 30px;

            text-align: center;

            line-height: 30px;

            border-radius: 50%;

        }

        .c2 {

            position: absolute;

            width: 100px;

            height: 30px;

            z-index: 10;

            opacity: 0;

            top: 0;

            bottom: 0;

            right: 0;

            left: 0;

        }

        .c3 {

            display: inline-block;

            background-color: blue;

            color: white;

            z-index: 9;

            position: absolute;

            top: 0;

            bottom: 0;

            right: 0;

            left: 0;

        }

    </style>

</head>

<body>

<div class="c1">

    <input class="c2" type="file" id="file11" name="file1"/>

    <a class="c3">上传</a>

</div>

<h3>原生XMLHttpRequest提交</h3>

<input type="button" value="XML提交" onclick="xhrSunbmit();">

<h3>jquery提交</h3>

<input type="button" value="jquery提交" onclick="jqSunbmit();">

<hr/>

<hr/>

<h3>iframe提交</h3>

    <form id="form1" action="/upload_file/" method="POST" enctype="multipart/form-data" target="ifm1">

        {% csrf_token %}

        <iframe id="ifm1" name="ifm1" style="display: none;"></iframe>

        <input type="file" name="fileobj" onchange="changeUpalod();" />

{#        <input type="submit" onclick="iframeSubmit();" value="Form提交"/>#}

    </form>

<div id="preview"></div>

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

<script src="/static/jquery.cookie.js"></script>

<script>

    function xhrSunbmit() {

        var file_obj = document.getElementById('file11').files[0];

        var fd = new FormData();

        fd.append('username', 'root');

        fd.append('fileobj', file_obj);

        var xhr = new XMLHttpRequest();

        xhr.open('POST', '/upload_file/', true);

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

        xhr.onreadystatechange = function () {

            if (xhr.readyState == 4) {

                var obj = JSON.parse(xhr.responseText);

                console.log(obj);

            }

        };

        xhr.send(fd);

    }

    function jqSunbmit() {

        var file_obj = document.getElementById('file11').files[0];

        var fd = new FormData();

        fd.append('username', 'root');

        fd.append('fafafa', file_obj);

        $.ajax({

            url: '/upload_file/',

            type: 'POST',

            headers: {'X-CSRFtoken': $.cookie('csrftoken')},

            data: fd,

            processData: false,  // tell jQuery not to process the data

            contentType: false,  // tell jQuery not to set contentType

            success: function (arg, a1, a2) {

                console.log(arg);

                console.log(a1);

                console.log(a2);

            }

        })

    }

    function changeUpalod(){

            $('#ifm1').load(function(){

                var text = $('#ifm1').contents().find('body').text();

                var obj = JSON.parse(text);

                $('#preview').empty();

                var imgTag = document.createElement('img');

                imgTag.src = "/" + obj.data;

                $('#preview').append(imgTag);

            });

            $('#form1').submit();

        }

 /*   function iframeSubmit(){

            $('#ifm1').load(function(){

                var text = $('#ifm1').contents().find('body').text();

                var obj = JSON.parse(text);

                $('#preview').empty();

                var imgTag = document.createElement('img');

                imgTag.src = "/" + obj.data;

                $('#preview').append(imgTag);

            })

        }*/

</script>

</body>

</html>

upload.html

巴特西

使用ajax发送文件的三种方式及预览图片的方法,上传按钮美化

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