利用jquery的ajaxPrefilter阻止重复发送请求

利用jquery的ajaxPrefilter阻止重复发送请求

(function ($) {

    var pendingRequests = {};

    // 所有ajax请求的通用前置filter

    $.ajaxPrefilter(function (options, originalOptions, jqXHR) {

        // 不重复发送相同请求

        var key = generatePendingRequestKey(options);

        if (!pendingRequests[key]) {

            //storePendingRequest(key, jqXHR);

            pendingRequests[key] = jqXHR;

        } else {

            // or do other

            jqXHR.abort();

        }

        var complete = options.complete;

        options.complete = function (jqXHR, textStatus) {

            // clear from pending requests

            pendingRequests[key] = null;

            if ($.isFunction(complete)) {

                complete.apply(this, arguments);

            }

        };

    });

    function generatePendingRequestKey(opts) {

        var url = opts.url;

        var type = opts.type;

        var data = opts.data;

        var str = url + type;

        if (data) {

            str += data;

        }

        return str;

    }

}(jQuery));