Ajax调用和function.apply无限循环

Question

I'm trying to print a .CSV in a web app I'm building for that purpose I have a link, something simple:

<a class="areaSummaryExport" value="1">...</a>

Then with Javascript and JQuery I do:

$('.areaSummaryExport').on('click', function(){
    exportAreaSummary($(this).attr('value'), $(this));
});

To export the .CSV with JQuery I need a <table> so I use ajax to get it from the server:

function exportAreaSummary(selected, sender){
    $.ajax({
        url: 'admin_ajax.php',
        method: 'get',
        dataType: 'json',
        data: {action: 'exportAreaSummary', area: selected}
    }).done(function(data){
        console.log('done');
        exportAreaSummary.apply(this, [data.table, data.name, data.header])
    }).error(function(XMLHttpRequest){
        console.log('error');
        console.log(XMLHttpRequest);
    });
}

And when I get it back, I 'apply' this function to create and download it:

function exportTableToCSV($table, filename, header) {
    var $rows = $table.find('tr:has(td),tr:has(th)'),

        // Temporary delimiter characters unlikely to be typed by keyboard
        // This is to avoid accidentally splitting the actual contents
        tmpColDelim = String.fromCharCode(11), // vertical tab character
        tmpRowDelim = String.fromCharCode(0), // null character

        // actual delimiter characters for CSV format
        colDelim = '","',
        rowDelim = '"\r\n"',

        // Grab text from table into CSV formatted string
        csv = '"' + 'sep=,' + rowDelim +
        (header? header.join(colDelim) + rowDelim : '') +
        $rows.map(function (i, row) {
            var $row = $(row),
                $cols = $row.find('td, th');

            return $cols.map(function (j, col) {
                var $col = $(col),
                    text = $col.text();

                return text.replace(/"/g, '""'); // escape double quotes

            }).get().join(tmpColDelim);

        }).get().join(tmpRowDelim)
            .split(tmpRowDelim).join(rowDelim)
            .split(tmpColDelim).join(colDelim) + '"',

        // Data URI
        csvData = 'data:application/csv;charset=utf-8,' + encodeURIComponent(csv);
    $(this)
        .attr({
        'download': filename,
            'href': csvData,
            'target': '_blank'
    });
}

This last function works perfectly somewhere else, but there the table is already in the page so I don't have to use any ajax. Here the table shouldn't be in the page, so I'm getting it with ajax and then sending it to exportTableToCSV() . But then (I'm not sure why) it goes in an infinite loop until the server crashes (last time there were 2000+ calls to the server).

Does anyone know why this is happening and how to fix it? Any other way to do it will also work for me.

Answer 1

You are calling exportAreaSummary in the success not exportTableToCSV

function exportAreaSummary(selected, sender){
    $.ajax({
        url: 'admin_ajax.php',
        method: 'get',
        dataType: 'json',
        data: {action: 'exportAreaSummary', area: selected}
    }).done(function(data){
        console.log('done');
        exportTableToCSV($(data.table), data.name, data.header)
    }).error(function(XMLHttpRequest){
        console.log('error');
        console.log(XMLHttpRequest);
    });
}