Could you tell me (for example, Google could not), if I can set the default file format for file upload.
Currently it allows to upload all files (please refer to the file image *.*), however I would like to limit to a specific file format.
All help is appreciated.
Environment:
NO HTML5
Backend: Struts
FrontEnd: jQuery-1.6.1
File upload plugin uses iframe to upload files.
you can use this
<input type="file" id="myfile" accept="image/gif, image/jpeg, image/png, image/jpeg" />
but using this. user can anytime change the filter. additionally you should use javascript or jquery to validate.
<script type ="text/javascript">
var validFiles=["bmp","gif","png","jpg","jpeg"];//array of allowed extensions
function OnUpload()
{
var obj = document.getElementById("myfile");
var source=obj.value;
var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase();
for (var i=0; i<validFiles.length; i++)
{
if (validFiles[i]==ext)
break;
}
if (i>=validFiles.length)
{
alert("This not a valid file upload file with an extention of one of the following:\n\n"+validFiles.join(", "));
return false;
}
return true;
}
</script>
