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" src="https://cdn.staticfile.org/jquery/3.3.1/jquery.js"></script>
<script type="text/javascript" src="https://cdn.staticfile.org/webuploader/0.1.1/webuploader.js"></script>
<script type="text/javascript" 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：
