fronend/js/basic.js

let Queue = {IS_LOADED : false, nowuse : 0, SVR_URL:"/server/", groupsCount : 0, groups:[], backup:["/server/","http://localhost:8803/server/","http://172.30.84.3:8803/server/","https://1.niimei.com/server/"] ,list:[]};

function get_server_url() {
    let output = $.ajax({url: Queue.SVR_URL + "/fcWorker/list?userId=1", timeout:1000 }).fail(on_check_fail).done(function(){
        Queue.IS_LOADED = true;
        console.warn("Using SERVER : ");
        console.warn(Queue.SVR_URL);
        setTimeout(parse_queue, 50);
    });
}

function on_check_fail(){
    if(Queue.nowuse === Queue.backup.length){
        var out = "";
        Queue.backup.forEach(function(val,index,arr){
            out += val + "\n";
        })
        alert("抱歉， 服务器连接失败! \n 请确认 " + out + "其中之一可用");
    }else{
        Queue.SVR_URL = Queue.backup[Queue.nowuse];
        Queue.nowuse ++;
        $.ajax({url: Queue.SVR_URL + "/fcWorker/list?userId=1", timeout:1000 }).fail(on_check_fail).done(function(){
            Queue.IS_LOADED = true;
            console.warn("Using SERVER : ");
            console.warn(Queue.SVR_URL);
            setTimeout(parse_queue, 50);
        });
    }
}

function get_data(url, callback) {
    Queue.list.push({url:url, callback:callback, gid:-1});
}

function new_data_group(groupName, callback){
    var gid = -1;
    Queue.groups.forEach(function(val,index,arr){
        if(val.groupName === groupName){
            gid = val.gid;
        }
    });
    if(gid === -1) {
        gid = Queue.groupsCount;
        Queue.groupsCount++;
        Queue.groups.push({
            gid: gid, groupName:groupName, callme: callback, counter:0
        });
    }
    return gid;
}

function group_get_data(groupName, url, callback){
    var gid = -1;
    Queue.groups.forEach(function(val,index,arr){
        if(val.groupName === groupName){
            gid = val.gid;
        }
    });
    if(gid === -1) {
        alert("Group 方法使用错误！！！")
    }
    Queue.list.push({url:url, callback:callback, gid:gid});
}

function parse_queue(){
    if(Queue.list.length > 0){
        let one = Queue.list.pop();
        if(one.gid === -1) {
            request_data(one.url, one.callback);
        }else{
            g_request_data(one.url, one.callback, one.gid);
        }
    }
    setTimeout(parse_queue,100);
}

function request_data(url, callback){
    $.ajax({
        url: Queue.SVR_URL + url,
        apiName: url,
        sendTime: new Date(),
        callme: callback
    }).done(on_dat_success).fail(on_fail);
}

function g_request_data(url, callback, gid){
    $.ajax({
        url: Queue.SVR_URL + url,
        apiName: url,
        sendTime: new Date(),
        gid: gid,
        callme: callback
    }).done(on_gp_success).fail(on_fail);
}

function on_gp_success(a,b) {
    var gid = this.gid;
    if(check_if_success(a,b)) {
        this.callme(a,b);
        Queue.groups.forEach(function(v,i,a){
            if(v.gid === gid){
                v.counter ++;
                v.callme(v);
            }
        });
    }
}

function on_dat_success(a,b){
    if(check_if_success(a,b)) {
        this.callme(a,b);
    }
}

function check_if_success(a,b){
    if(typeof a === "string"){
        try {
            a = JSON.parse(a);
        }catch (e) {
            console.warn("=----------   异常   -----------=");
            console.warn(a);
            console.warn("=----------------------------=");
            alert("信息失败 : "+e);
            return;
        }
    }else if(typeof  a == "undefined"){
        console.warn("=----------   异常   -----------=");
        console.warn(a);
        console.warn("=------------------------------=");
        alert("信息失败 : "+e);
        return;
    }
    if(a.ret === "10000") {
        return true;
    }else{
        console.error(JSON.stringify(a));
        alert("查询失败 : 请参阅控制台输出! ");
    }

    return false;
}

function on_fail(msg) {
    alert("很抱歉，网络错误，请查看Console");
    console.warn("-----   网络请求失败 ---------")
    console.warn(JSON.stringify(this));
    console.warn("----------------------------")
}

function first_parse(ajax, obj) {
    if (typeof obj === "string") {
        obj = JSON.parse(obj);
    }

    if (typeof obj !== "object") {
        console.warn(ajax);
        throw "Error ! Parsing JSON failed ." + JSON.stringify(obj);
    }

    if (obj.ret === "10000") {
        return obj.model;
    } else {
        console.warn(ajax);
        throw "Error ! Server returned error." + JSON.stringify(obj);
    }
}


function on_document_load() {
    if(typeof (page_document_load) !== "undefined"){
        page_document_load();
    }
    if(typeof (resizeAll) !== "undefined"){
        resizeAll();
    }
}

$(document).ready(on_document_load);
get_server_url();