django+python大文件上传

2023-01-31 06:17

短信预约 -IT技能 免费直播动态提醒

大文件上传服务
一、前端
[webuploader](http://fex.baidu.com/webuploader/ ''webuploader'')
二、后端
django 2.0.0
这里只贴出核心的代码：
前端的：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!--引入CSS-->
<link rel="stylesheet" type="text/css" href="https://cdn.staticfile.org/webuploader/0.1.1/webuploader.css">
<link rel="stylesheet" type="text/css" href="https://cdn.staticfile.org/twitter-bootstrap/4.1.3/css/bootstrap.css">

<!--引入JS-->
<script type="text/javascript" class="lazy" data-src="https://cdn.staticfile.org/jquery/3.3.1/jquery.js"></script>
<script type="text/javascript" class="lazy" data-src="https://cdn.staticfile.org/webuploader/0.1.1/webuploader.js"></script>
<script type="text/javascript" class="lazy" data-src="https://cdn.staticfile.org/twitter-bootstrap/4.1.3/js/bootstrap.js"></script>
</head>
<body>
<div id="uploader" class="wu-example">
    <!--用来存放文件信息-->
    <div id="thelist" class="uploader-list"></div>
    <div class="btns">
        <div id="picker">选择文件</div>
        <button id="ctlBtn" class="btn btn-default">开始上传</button>
    </div>
    <div class="progress">         <!-- 进度条 -->
            <div class="progress-bar progress-bar-striped active" role="progressbar" style="width:0%;"></div>
        </div>
</div>
 <script type="text/javascript">
    $(document).ready(function() {
        var task_id = WebUploader.Base.guid();        //产生task_id
        var uploader = WebUploader.create({           //创建上传控件
            swf: 'https://cdn.staticfile.org/webuploader/0.1.1/Uploader.swf', //swf位置，这个可能与flash有关
            server: '/resource/files/upload/',                 //接收每一个分片的服务器地址
            pick: '#picker',                          //填上传按钮的id选择器值
            auto: true,                               //选择文件后，是否自动上传
            chunked: true,                            //是否分片
            chunkSize: 10 * 1024 * 1024,              //每个分片的大小，这里为10M
            chunkRetry: 3,                            //某分片若上传失败，重试次数
            threads: 1,                               //线程数量，考虑到服务器，这里就选了1
            duplicate: true,                          //分片是否自动去重
            formData: {                               //每次上传分片，一起携带的数据
                task_id: task_id,
            },
        });

        uploader.on('startUpload', function() {       //开始上传时，调用该方法
            $('.progress-bar').css('width', '0%');
            $('.progress-bar').text('0%');
        });

        uploader.on('uploadProgress', function(file, percentage) { //一个分片上传成功后，调用该方法
            $('.progress-bar').css('width', percentage * 100 - 1 + '%');
            $('.progress-bar').text(Math.floor(percentage * 100 - 1) + '%');
        });

        uploader.on('uploadSuccess', function(file) { //整个文件的所有分片都上传成功，调用该方法
            //上传的信息（文件唯一标识符，文件名）
            var data = {'task_id': task_id, 'filename': file.source['name'] };
            $.get('/resource/upload/complete/', data);          //ajax携带data向该url发请求
            $('.progress-bar').css('width', '100%');
            $('.progress-bar').text('上传完成');
        });

        uploader.on('uploadError', function(file) {   //上传过程中发生异常，调用该方法
            $('.progress-bar').css('width', '100%');
            $('.progress-bar').text('上传失败');
        });

        uploader.on('uploadComplete', function(file) {//上传结束，无论文件最终是否上传成功，该方法都会被调用
            $('.progress-bar').removeClass('active progress-bar-striped');
        });

    });
    </script>

</body>
</html>

后端的：
路由

    path('files/upload/', views.fileupload,name='图片分片上传'),
    path('upload/complete/', views.fileMerge,name='上传成功合并'),

视图：

@csrf_exempt
def fileupload(request):
    if request.method == 'POST':
        upload_file = request.FILES.get('file')
        task = request.POST.get('task_id')  # 获取文件唯一标识符
        chunk = request.POST.get('chunk', 0)  # 获取该分片在所有分片中的序号
        filename = '%s%s' % (task, chunk)  # 构成该分片唯一标识符
        print("filename=",filename)
        default_storage.save('./upload/%s' % filename,ContentFile(upload_file.read()))  # 保存分片到本地
    return render_to_response('upload.html',locals())

@csrf_exempt
def fileMerge(request):
    print(request.GET)
    task = request.GET.get('task_id')
    ext = request.GET.get('filename', '')
    upload_type = request.GET.get('type')
    if len(ext) == 0 and upload_type:
        ext = upload_type.split('/')[1]
    ext = '' if len(ext) == 0 else '.%s' % ext  # 构建文件后缀名
    chunk = 0
    with open('./upload/%s%s' % (task, ext), 'wb') as target_file:  # 创建新文件
        while True:
            try:
                filename = './upload/%s%d' % (task, chunk)
                source_file = open(filename, 'rb')  # 按序打开每个分片
                target_file.write(source_file.read())  # 读取分片内容写入新文件
                source_file.close()
            except IOError:
                break
            chunk += 1
            os.remove(filename)  # 删除该分片，节约空间
    return render_to_response('upload.html',locals())

效果图：
django+python大文件上传