【JS前端小技巧】JavaScript，把URL里的IP地址替换成指定IP地址

js把一个url里的ip替换成指定ip

需求： javascript把一个url里的ip地址换成指定ip

function IntelliURLReplaceIP(url) {
    var url = url||"";
    var ip = "10.67.83.48";

    try {
        if (url == "") {
            return url;
        }

        if(url.indexOf(ip) != -1)
        {
            //console.log("the same ip.");
            return url;//没有此字段则退出
        }

        //截取ip前字段"http:"
        if(url.indexOf('//') == -1)
        {
            return url;//没有此字段则退出
        }
        var substr1 = url.substring(0,url.indexOf('//'));
        //console.log("oldurl protocol:",substr1);//"http:"

        //截取ip后字段"it/local/facerec/default/20200609112555435018.jpg""
        if(url.indexOf('/it/') == -1)
        {
            return url;//没有此字段则退出
        }
        var substr2 = url.substring(url.indexOf('/it/')+1,url.length);
        //console.log("oldurl path:", substr2);//"it/local/facerec/default/20200609112555435018.jpg"

        var newurl = substr1+"//"+ ip + "/" + substr2;
        //console.log("newurl:",newurl);

        return newurl;

    } catch(exception){
        //alert("error");
    }
}
console.log(IntelliURLReplaceIP("http://10.67.82.93/it/local/facerec/default/20200609112555435018.jpg"));