ajax之---上传图片和预览

views.py

def upload_img(request):
    nid=str(uuid.uuid4())
    ret={'status':True,'data':None,'message':None}
    obj=request.FILES.get('k3')
    file_path=os.path.join('static',nid+obj.name)
    f=open(file_path,'wb')
    for line in obj.chunks():
        f.write(line)
    f.close()
    ret['data']=file_path
    return HttpResponse(json.dumps(ret))

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .btn{
            display: inline-block;
            padding: 5px 10px;
            background-color: coral;
            color: white;
        }
    </style>
</head>
<body>

    <iframe style="display: none" id="iframe1" name="ifra1"></iframe>
    <form id="fm1" action="/upload_img.html" method="POST" enctype="multipart/form-data" target="ifra1">
        <input type="file" name="k3" onchange="uploadFile();" />
    </form>
    <h3>预览</h3>
    <div id="preview">
    </div>
    <script src="/static/js/jquery-3.1.1.js"></script>
    <script>

        function uploadFile() {
            document.getElementById('iframe1').onload = reloadIframe1;
            document.getElementById('fm1').submit();
        }
        function reloadIframe1() {
            var content = this.contentWindow.document.body.innerHTML;
            var obj = JSON.parse(content);

            var tag = document.createElement('img');
            tag.src = obj.data;
            $('#preview').empty().append(tag);
        }
    </script>
</body>
</html>

posted on 2018-06-10 19:24  小孩没穿鞋  阅读(170)  评论(0)  编辑  收藏  举报

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