maxFileSize and acceptFileTypes in blueimp file upload plugin do not work. Why?

I'm using Blueimp jQuery file upload plugin for upload files.

I had no problem in uploading but the option maxFileSize and acceptFileTypes do not work.

This is my code:

$(document).ready(function () {
    'use strict';

    $('#fileupload').fileupload({
        dataType: 'json',
        autoUpload: false,
        acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i,
        maxFileSize: 5000000,
        done: function (e, data) {
            $.each(data.result.files, function (index, file) {
                $('<p style="color: green;">' + file.name + '<i class="elusive-ok" style="padding-left:10px;"/> - Type: ' + file.type + ' - Size: ' + file.size + ' byte</p>')
                    .appendTo('#div_files');
            });
        },
        fail: function (e, data) {
            $.each(data.messages, function (index, error) {
                $('<p style="color: red;">Upload file error: ' + error + '<i class="elusive-remove" style="padding-left:10px;"/></p>')
                    .appendTo('#div_files');
            });
        },
        progressall: function (e, data) {
            var progress = parseInt(data.loaded / data.total * 100, 10);

            $('#progress .bar').css('width', progress + '%');
        }
    });
});

Had the same problem, and the blueimp guy says "maxFileSize and acceptFileTypes are only supported by the UI version" and has provided a (broken) link to incorporate the _validate and _hasError methods.

So without knowing how to incorporate those methods without messing up the script I wrote this little function. It seems to work for me.

Just add this

add: function(e, data) {
        var uploadErrors = [];
        var acceptFileTypes = /^image\/(gif|jpe?g|png)$/i;
        if(data.originalFiles[0]['type'].length && !acceptFileTypes.test(data.originalFiles[0]['type'])) {
            uploadErrors.push('Not an accepted file type');
        }
        if(data.originalFiles[0]['size'].length && data.originalFiles[0]['size'] > 5000000) {
            uploadErrors.push('Filesize is too big');
        }
        if(uploadErrors.length > 0) {
            alert(uploadErrors.join("\n"));
        } else {
            data.submit();
        }
},

at the start of the .fileupload options as shown in your code here

$(document).ready(function () {
    'use strict';

    $('#fileupload').fileupload({
        add: function(e, data) {
                var uploadErrors = [];
                var acceptFileTypes = /^image\/(gif|jpe?g|png)$/i;
                if(data.originalFiles[0]['type'].length && !acceptFileTypes.test(data.originalFiles[0]['type'])) {
                    uploadErrors.push('Not an accepted file type');
                }
                if(data.originalFiles[0]['size'].length && data.originalFiles[0]['size'] > 5000000) {
                    uploadErrors.push('Filesize is too big');
                }
                if(uploadErrors.length > 0) {
                    alert(uploadErrors.join("\n"));
                } else {
                    data.submit();
                }
        },
        dataType: 'json',
        autoUpload: false,
        // acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i,
        // maxFileSize: 5000000,
        done: function (e, data) {
            $.each(data.result.files, function (index, file) {
                $('<p style="color: green;">' + file.name + '<i class="elusive-ok" style="padding-left:10px;"/> - Type: ' + file.type + ' - Size: ' + file.size + ' byte</p>')
                .appendTo('#div_files');
            });
        },
        fail: function (e, data) {
            $.each(data.messages, function (index, error) {
                $('<p style="color: red;">Upload file error: ' + error + '<i class="elusive-remove" style="padding-left:10px;"/></p>')
                .appendTo('#div_files');
            });
        },
        progressall: function (e, data) {
            var progress = parseInt(data.loaded / data.total * 100, 10);

            $('#progress .bar').css('width', progress + '%');
        }
    });
});

You'll notice I added a filesize function in there as well because that will also only work in the UI version.

Updated to get past issue suggested by @lopsided: Added data.originalFiles[0]['type'].length and data.originalFiles[0]['size'].length in the queries to make sure they exist and are not empty first before testing for errors. If they don't exist, no error will be shown and it will only rely on your server side error testing.