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RadAsyncUpload Check File Headers before saving file

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AsyncUpload
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Edward
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Edward asked on 01 Mar 2012, 10:35 PM
I'd like to check the first few bytes of a file that is being uploaded to ensure that it is actually of the type specified in its file exstension.
Is there any built-in functionality  or recommended way of doing this with a RadAsyncUpload control?
Thanks!

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Plamen
Telerik team
answered on 06 Mar 2012, 05:53 PM
Hello Edward,

 
Generally this scenario is not supported by RadAsyncUpload, but you can implement such functionality only by using the File Api upload module. This is possible when you handle the onClientFileUploading event and read the file from the get_row() property as shown in this forum.

Hope this will help you.

Kind regards,
Plamen Zdravkov
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zykes
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answered on 03 Dec 2013, 05:28 AM
Hi,

Any update on this one? like the question above, I wanted to check whether the file to be uploaded is valid. What if the file extension is just changed to the accepted file extension, how can the control validate the file to be uploaded?

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Plamen
Telerik team
answered on 05 Dec 2013, 01:35 PM
Hi,

Unfortunately this is a browser limitation and can be achieve only with the browser that support file api upload. Getting such information in the other upload module is not a supported scenario.

Regards,
Plamen
Telerik
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