Django框架學習筆記（28.檔案上傳詳解）
阿新 • • 發佈：2019-01-01
1.所有美觀的上傳按鈕原理：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .upload { display: inline-block; padding: 10px; background-color: aqua; position: absolute; top: 0; bottom: 0; left: 0; right: 0; z-index: 90; } .file { width: 100px; height: 50px; opacity: 0; position: absolute; top: 0; bottom: 0; left: 0; right: 0; z-index: 100; } </style> </head> <body> <div style="position:relative; width: 100px; height: 50px"> <input class="file" type="file" id="666" name="2333"/> <a class="upload">上傳</a> </div> </body> </html>
jQuery的檔案上傳：
<body> <div style="position:relative; width: 100px; height: 50px"> <input class="file" type="file" id="f666" name="2333"/> <a class="upload">上傳</a> </div> <inputtype="button" value="提交jQuery" onclick="jqSubmit();"/> <script src="/static/jquery-1.12.4.js"></script> <script> function jqSubmit() { // $('#fafafa')[0] var file_obj = document.getElementById('f666').files[0]; var fd = new FormData(); fd.append('username', 'root'); fd.append('f666', file_obj); $.ajax({ url: '/upload_file/', type: 'POST', data: fd, processData: false, // tell jQuery not to process the data contentType: false, // tell jQuery not to set contentType success: function () {} }) } </script> </body>
views.py:
def upload(request): return render(request, 'upload.html') from django.views.decorators.csrf import csrf_exempt, csrf_protect @csrf_exempt def upload_file(request): username = request.POST.get('username') f666 = request.FILES.get('f666') with open(f666.name, 'wb') as f: for item in f666.chunks(): f.write(item) return HttpResponse('OK')
XHR方式上傳檔案：
<script> function xhrSubmit(){ var file_obj = document.getElementById('f666').files[0]; var fd = new FormData(); fd.append('username','root'); fd.append('f666',file_obj); var xhr = new XMLHttpRequest(); xhr.open('POST', '/upload_file/',true); xhr.send(fd); } </script>
IFRAME方式上傳：
<body> <form id="form1" action="/upload_file/" method="POST" enctype="multipart/form-data" target="ifm1"> <iframe id="ifm1" name="ifm1" style="display: none;"></iframe> <input type="file" name="f666" onchange="changeUpalod();"/> <input type="submit" onclick="iframeSubmit();" value="Form提交"/> </form> <script> </script> </body>
上傳檔案預覽：
views.py:
from django.views.decorators.csrf import csrf_exempt, csrf_protect import json import os @csrf_exempt def upload_file(request): f666 = request.FILES.get('f666') img_path = os.path.join('static/imgs/', f666.name) with open(img_path, 'wb') as f: for item in f666.chunks(): f.write(item) ret = {'data': img_path} return HttpResponse(json.dumps(ret))
html:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title></head> <body> <form id="form1" action="/upload_file/" method="POST" enctype="multipart/form-data" target="ifm1"> <iframe id="ifm1" name="ifm1" style="display: none;"></iframe> <input type="file" name="f666" onchange="changeUpalod();"/> <input type="submit" onclick="iframeSubmit();" value="提交"/> </form> <div id="preview"></div> <script src="/static/jquery-1.12.4.js"></script> <script> 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>
上面的預覽要上傳後才可以，下面這個只要選擇圖片後就可以預覽：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form id="form1" action="/upload_file/" method="POST" enctype="multipart/form-data" target="ifm1"> <iframe id="ifm1" name="ifm1" style="display: none;"></iframe> <input type="file" name="f666" onchange="changeUpload();"/> <input type="submit" onclick="iframeSubmit();" value="提交"/> </form> <div id="preview"></div> <script src="/static/jquery-1.12.4.js"></script> <script> function changeUpload() { $('#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>