app/node_modules/qiniu-js/esm/upload/hosts.js

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import { getUpHosts } from '../api';
/**
  * @description 解冻时间，key 是 host，value 为解冻时间
  */
var unfreezeTimeMap = new Map();
var Host = /** @class */ (function () {
    function Host(host, protocol) {
        this.host = host;
        this.protocol = protocol;
    }
    /**
     * @description 当前 host 是否为冻结状态
     */
    Host.prototype.isFrozen = function () {
        var currentTime = new Date().getTime();
        var unfreezeTime = unfreezeTimeMap.get(this.host);
        return unfreezeTime != null && unfreezeTime >= currentTime;
    };
    /**
     * @param  {number} time 单位秒，默认 20s
     * @description 冻结该 host 对象，该 host 将在指定时间内不可用
     */
    Host.prototype.freeze = function (time) {
        if (time === void 0) { time = 20; }
        var unfreezeTime = new Date().getTime() + (time * 1000);
        unfreezeTimeMap.set(this.host, unfreezeTime);
    };
    /**
     * @description 解冻该 host
     */
    Host.prototype.unfreeze = function () {
        unfreezeTimeMap["delete"](this.host);
    };
    /**
     * @description 获取当前 host 的完整 url
     */
    Host.prototype.getUrl = function () {
        return this.protocol + "://" + this.host;
    };
    /**
     * @description 获取解冻时间
     */
    Host.prototype.getUnfreezeTime = function () {
        return unfreezeTimeMap.get(this.host);
    };
    return Host;
}());
export { Host };
var HostPool = /** @class */ (function () {
    /**
     * @param  {string[]} initHosts
     * @description 如果在构造时传入 initHosts，则该 host 池始终使用传入的 initHosts 做为可用的数据
     */
    function HostPool(initHosts) {
        if (initHosts === void 0) { initHosts = []; }
        this.initHosts = initHosts;
        /**
         * @description 缓存的 host 表，以 bucket 和 accessKey 作为 key
         */
        this.cachedHostsMap = new Map();
    }
    /**
     * @param  {string} accessKey
     * @param  {string} bucketName
     * @param  {string[]} hosts
     * @param  {InternalConfig['upprotocol']} protocol
     * @returns  {void}
     * @description 注册可用 host
     */
    HostPool.prototype.register = function (accessKey, bucketName, hosts, protocol) {
        this.cachedHostsMap.set(accessKey + "@" + bucketName, hosts.map(function (host) { return new Host(host, protocol); }));
    };
    /**
     * @param  {string} accessKey
     * @param  {string} bucketName
     * @param  {InternalConfig['upprotocol']} protocol
     * @returns  {Promise<void>}
     * @description 刷新最新的 host 数据，如果用户在构造时该类时传入了 host 或者已经存在缓存则不会发起请求
     */
    HostPool.prototype.refresh = function (accessKey, bucketName, protocol) {
        var _a, _b, _c, _d;
        return __awaiter(this, void 0, void 0, function () {
            var cachedHostList, response, stashHosts;
            return __generator(this, function (_e) {
                switch (_e.label) {
                    case 0:
                        cachedHostList = this.cachedHostsMap.get(accessKey + "@" + bucketName) || [];
                        if (cachedHostList.length > 0)
                            return [2 /*return*/];
                        if (this.initHosts.length > 0) {
                            this.register(accessKey, bucketName, this.initHosts, protocol);
                            return [2 /*return*/];
                        }
                        return [4 /*yield*/, getUpHosts(accessKey, bucketName, protocol)];
                    case 1:
                        response = _e.sent();
                        if ((response === null || response === void 0 ? void 0 : response.data) != null) {
                            stashHosts = __spread((((_b = (_a = response.data.up) === null || _a === void 0 ? void 0 : _a.acc) === null || _b === void 0 ? void 0 : _b.main) || []), (((_d = (_c = response.data.up) === null || _c === void 0 ? void 0 : _c.acc) === null || _d === void 0 ? void 0 : _d.backup) || []));
                            this.register(accessKey, bucketName, stashHosts, protocol);
                        }
                        return [2 /*return*/];
                }
            });
        });
    };
    /**
     * @param  {string} accessKey
     * @param  {string} bucketName
     * @param  {InternalConfig['upprotocol']} protocol
     * @returns  {Promise<Host | null>}
     * @description 获取一个可用的上传 Host，排除已冻结的
     */
    HostPool.prototype.getUp = function (accessKey, bucketName, protocol) {
        return __awaiter(this, void 0, void 0, function () {
            var cachedHostList, availableHostList, priorityQueue;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, this.refresh(accessKey, bucketName, protocol)];
                    case 1:
                        _a.sent();
                        cachedHostList = this.cachedHostsMap.get(accessKey + "@" + bucketName) || [];
                        if (cachedHostList.length === 0)
                            return [2 /*return*/, null];
                        availableHostList = cachedHostList.filter(function (host) { return !host.isFrozen(); });
                        if (availableHostList.length > 0)
                            return [2 /*return*/, availableHostList[0]
                                // 无可用的，去取离解冻最近的 host
                            ];
                        priorityQueue = cachedHostList
                            .slice().sort(function (hostA, hostB) { return (hostA.getUnfreezeTime() || 0) - (hostB.getUnfreezeTime() || 0); });
                        return [2 /*return*/, priorityQueue[0]];
                }
            });
        });
    };
    return HostPool;
}());
export { HostPool };
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