利用iframe和form上传和预览图片

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URL文件

from django.contrib import admin
from django.urls import path
from app01 import views
urlpatterns = [
    path(‘admin/‘, admin.site.urls),

    path(‘upload.html/‘, views.upload),
    path(‘upload_img.html/‘, views.upload_img),
]

 

 

views文件

from django.shortcuts import render,HttpResponse
import json
# Create your views here.



def upload(request):

    return render(request,‘upload.html‘)

def upload_img(request):
    import os
    import uuid

    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))

 

 

html文件

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

    </div>


    <script src="/static/js/jquery-3.3.1.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);
            console.log(obj.data);
            var tag = document.createElement(‘img‘);
            tag.src=‘/‘+obj.data;
            $(‘#prevl‘).empty().append(tag)

        }

    </script>


</body>
</html>

 

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