// ==UserScript==
// @name AC-baidu： 优化百度、搜狗、谷歌搜索结果之重定向 lite
// @icon            https://coding.net/u/zb227/p/zbImg/git/raw/master/img0/icon.jpg
// @grant		    GM_xmlhttpRequest
// @author          AC
// @create          2015-11-25
// @run-at          document-start
// @version         9.4
// @connect         *
// @include         http://www.baidu.com/*
// @include         https://www.baidu.com/*
// @include         http://www.sogou.com/*
// @include         https://www.sogou.com/*
// @include         /^https?\:\/\/encrypted.google.[^\/]+/
// @include         /^https?\:\/\/www.google.[^\/]+/
// @include         https://*.zhidao.baidu.com/*
// @include         https://zhidao.baidu.com/*
// @home-url        https://greasyfork.org/zh-TW/scripts/14178
// @namespace       1353464539@qq.com
// @copyright       2017, AC
// @description     繞過百度、搜狗搜索結果中的自己的跳轉鏈接，直接訪問原始網頁-反正都能看懂
// @lastmodified    2017-05-26
// @feedback-url    https://greasyfork.org/zh-TW/scripts/14178
// @note            2017.05.26-V9.4 只是移除百度的重定向问题，其他不做处理，不包含去广告，不添加favicon
// @downloadURL none
// ==/UserScript==

// 采用MutationObserver监视会大大实际代码的调用次数-比DOMNodeInserted更好的调用方式，但是百度已经移除了Mo，所以继续用Dom吧，以后来改
(function(){
    var fatherName = new Array(
        "c-container", //baidu1
        "rc", //google
        "b_algo", //bing1
        "b_ans", //bing2
        "vrwrap", //sogou1
        "rb"//sogou2
    );
    var Stype; // 去重定向的选择
    var Ftype; // favicon的选择
    if (location.host == "www.baidu.com") {
        Stype = "h3.t>a";
        Ftype = ".f13 .c-showurl[href],.c-container>div[class^='c-'] .c-showurl[href],.c-container>div[class^='c-'] .texttolink[href]";
    } else if (location.host == "sogou.com") {
        Stype = "h3.pt>a, h3.vrTitle>a";
        Ftype = "cite[id*='cacheresult_info_']";
    } else if (location.host.indexOf("google") > -1){
        Stype = "h3>a";
        Ftype = "._Rm";
    } else {
        addStyle(".word-replace{display: none  !important;}");
        return;
    }
    document.addEventListener("DOMNodeInserted", function(event){
        var element = event.target;
        removeOnMouseDownFunc();
        resetURL(document.querySelectorAll(Stype));
    });
    function removeOnMouseDownFunc(){
        try{
            var nodes = document.querySelectorAll(".g .rc .r a");
            for(var i=0; i<nodes.length; i++){
                nodes[i].setAttribute("onmousedown", "");
            }
        }catch(e){}
    }
    function addStyle(css) { //添加CSS的代码--copy的
        var pi = document.createProcessingInstruction(
            'xml-stylesheet',
            'type="text/css" href="data:text/css;utf-8,' + encodeURIComponent(css) + '"'
        );
        return document.insertBefore(pi, document.documentElement);
    }
    function resetURL(list){
        for(var i = 0; i < list.length; i++){
            // 此方法是异步，故在结束的时候使用i会出问题-严重!
            // 采用闭包的方法来进行数据的传递
            if(list[i].getAttribute("ac_redirectStatus") == null){
                var curhref = list[i].href;
                list[i].setAttribute("ac_redirectStatus", "0");
                if(curhref.indexOf("baidu.com") > -1 || curhref.indexOf("sogou.com") > -1){
                  (function(c_curhref){
                    GM_xmlhttpRequest({
                            url: c_curhref,
                            headers: {
                                "Accept": "text/html"
                            },
                            method: "GET",
                            onreadystatechange:function(response) {
                                if(response.status==200){
                                    DealResult(response, c_curhref);
                                }
                            }
                    });
                  })(curhref); //传递旧的网址过去，读作c_curhref
                }else if(curhref.indexOf("/interstitial") > -1){
                    
                }else{
                    //console.log("绕过百度重定向直接访问网页： 第"+i+"个已经处理了");
                }
            }
        }
    }
    function DealResult(response, c_curhref){
        var resultURL = response.finalUrl;
        if(Stype.length > 10){
            //如果是搜狗的结果
            var resultResponseUrl = Reg_Get(response.responseText, "URL='([^']+)'");
            if(resultResponseUrl !== null)
                resultURL = resultResponseUrl;
        }
        var indexhref = Reg_Get(c_curhref, "((?:http)[^&]+)");// 必须要提取部分数据，因为之后的莫名加了其他参数ck=0.0.0.0.....
        var ccnode = document.querySelectorAll("h3>[href*='"+indexhref+"']")[0];
        if(ccnode != null){
            ccnode.href = resultURL;
        }else{
            console.log("该链接已经被其他脚本干掉了哦"+resultURL);
        }
    }
    function Reg_Get(HTML, reg){
        var RegE = new RegExp(reg);
        return RegE.exec(HTML)[1];
    }
})();