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File ContentType for .zip file is null

6 Answers 312 Views

AsyncUpload

This is a migrated thread and some comments may be shown as answers.

6 Answers, 1 is accepted

answered on 20 Jul 2015, 07:18 AM

Hi Rakesh,

Are you using Google Chrome? This look like a bug in Chrome. It can be reproduced with the following hmtl:

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<title></title>

</head>

<body>

<div>

Select .zip file.

</div>

<input type="file" id="fileInput" onchange="fileSelected()" />

<script type="text/javascript">

function fileSelected() {

var input = document.getElementById('fileInput');

var file = input.files[0];

alert(file.type);

}

</script>

</body>

</html>

I have logged this issue to Google - Web API Blob.Type returns empty mime type when zip file is selected.
But this what is more interesting here is that IE10/11 also returns empty mime type for zip files.

Regards,
Hristo Valyavicharski
Telerik

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Accepted

answered on 20 Jul 2015, 02:25 PM

Since this is a bug in browser's File API implementation try to disable the AsyncUpload File API module:

<telerik:RadAsyncUpload runat="server" ID="upload" DisablePlugins="true"

HttpHandlerUrl="~/AsyncHandler.ashx"></telerik:RadAsyncUpload>

<script type="text/javascript">

Telerik.Web.UI.RadAsyncUpload.Modules.FileApi.isAvailable = function () { return false; }

</script>

I hope this helps.

Regards,
Hristo Valyavicharski
Telerik