qcminecraft/Carbon-Forum-F

/**
 * jQuery upload v1.2
 * http://www.ponxu.com
 * https://github.com/ponxu/upload-jquery
 * @author xwz
 */
(function($) {
    var noop = function(){ return true; };
    var frameCount = 0;
    
    $.uploadDefault = {
        url: '',
        fileName: 'filedata',
        dataType: 'json',
        params: {},
        onSend: noop,
        onSubmit: noop,
        onComplate: noop
    };

    $.upload = function(options) {
        var opts = $.extend(jQuery.uploadDefault, options);
        if (opts.url === '') {
            return;
        }
        
        var canSend = opts.onSend();
        if (!canSend) {
            return;
        }
        
        var frameName = 'upload_frame_' + (frameCount++);
        var iframe = $('<iframe style="position:absolute;top:-9999px" />').attr('name', frameName);
        var form = $('<form method="post" style="display:none;" enctype="multipart/form-data" />').attr('name', 'form_' + frameName);
        form.attr("target", frameName).attr('action', opts.url);
        
        // form中增加数据域
        var formHtml = '<input type="file" name="' + opts.fileName + '" onchange="onChooseFile(this)">';
        for (var key in opts.params) {
            formHtml += '<input type="hidden" name="' + key + '" value="' + opts.params[key] + '">';
        }
        form.append(formHtml);

        iframe.appendTo("body");
        form.appendTo("body");
        
        form.submit(opts.onSubmit);
        
        // iframe 在提交完成之后
        iframe.load(function() {
            var contents = $(this).contents().get(0);
            var data = $(contents).find('body').text();
            if ('json' == opts.dataType) {
                data = window.eval('(' + data + ')');
            }
            opts.onComplate(data);
            setTimeout(function() {
                iframe.remove();
                form.remove();
            }, 5000);
        });
        
        // 文件框
        var fileInput = $('input[type=file][name=' + opts.fileName + ']', form);
        fileInput.click();
    };
})(jQuery);

// 选中文件, 提交表单(开始上传)
var onChooseFile = function(fileInputDOM) {
    var form = $(fileInputDOM).parent();
    form.submit();
};