wxlitian/miniprogram/miniprogram_npm/signalr-for-wx/HttpConnection.js

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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import { LogLevel } from "./ILogger";
import { HttpTransportType, TransferFormat } from "./ITransport";
import { LongPollingTransport } from "./LongPollingTransport";
import { Arg, createLogger } from "./Utils";
import DefaultRequest from "./DefualtRequest";
import { ResponseType } from "./wx-request/model/ResponseType";
import { WxSocketTransport } from "./WxSocketTransport";
var MAX_REDIRECTS = 100;
var WxSocketModule = WxSocketTransport;
var LongPollingModule = LongPollingTransport;
/** @private */
var HttpConnection = /** @class */ (function () {
    function HttpConnection(url, options) {
        if (options === void 0) { options = {}; }
        this.features = {};
        Arg.isRequired(url, "url");
        this.logger = createLogger(options.logger);
        options = options || {};
        // ! 这里修改为自定义解析 和 默认传入 全路径方式
        this.baseUrl = options.resolveUrl ? options.resolveUrl(url) : this.resolveUrl(url);
        options.logMessageContent = options.logMessageContent || false;
        // ! 修改 options 参数赋值方式
        if (!options.WxSocket && wx) {
            options.WxSocket = WxSocketModule;
        }
        if (!options.LongPolling) {
            options.LongPolling = LongPollingModule;
        }
        this.request = options.request || new DefaultRequest({}, this.logger);
        this.connectionState = 2 /* Disconnected */;
        this.options = options;
        this.onreceive = null;
        this.onclose = null;
    }
    HttpConnection.prototype.start = function (transferFormat) {
        transferFormat = transferFormat || TransferFormat.Binary;
        Arg.isIn(transferFormat, TransferFormat, "transferFormat");
        this.logger.log(LogLevel.Debug, "Starting connection with transfer format '" + TransferFormat[transferFormat] + "'.", TransferFormat);
        if (this.connectionState !== 2 /* Disconnected */) {
            return Promise.reject(new Error("Cannot start a connection that is not in the 'Disconnected' state. state is " + this.connectionState));
        }
        this.connectionState = 0 /* Connecting */;
        this.startPromise = this.startInternal(transferFormat);
        return this.startPromise;
    };
    HttpConnection.prototype.send = function (data) {
        if (this.connectionState !== 1 /* Connected */) {
            throw new Error("Cannot send data if the connection is not in the 'Connected' State.");
        }
        // Transport will not be null if state is connected
        return this.transport.send(data);
    };
    HttpConnection.prototype.stop = function (error) {
        return __awaiter(this, void 0, void 0, function () {
            var e_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this.connectionState = 2 /* Disconnected */;
                        // Set error as soon as possible otherwise there is a race between
                        // the transport closing and providing an error and the error from a close message
                        // We would prefer the close message error.
                        this.stopError = error;
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 3, , 4]);
                        return [4 /*yield*/, this.startPromise];
                    case 2:
                        _a.sent();
                        return [3 /*break*/, 4];
                    case 3:
                        e_1 = _a.sent();
                        return [3 /*break*/, 4];
                    case 4:
                        if (!this.transport) return [3 /*break*/, 6];
                        return [4 /*yield*/, this.transport.stop()];
                    case 5:
                        _a.sent();
                        this.transport = undefined;
                        _a.label = 6;
                    case 6: return [2 /*return*/];
                }
            });
        });
    };
    HttpConnection.prototype.startInternal = function (transferFormat) {
        return __awaiter(this, void 0, void 0, function () {
            var url, negotiateResponse, redirects, _loop_1, this_1, state_1, e_2;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        url = this.baseUrl;
                        this.accessTokenFactory = this.options.accessTokenFactory;
                        this.socketUrlFactory = this.options.socketUrlFactory;
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 12, , 13]);
                        if (!this.options.skipNegotiation) return [3 /*break*/, 5];
                        if (!(this.options.transport === HttpTransportType.WebSockets)) return [3 /*break*/, 3];
                        // No need to add a connection ID in this case
                        this.transport = this.constructTransport(HttpTransportType.WebSockets);
                        // We should just call connect directly in this case.
                        // No fallback or negotiate in this case.
                        return [4 /*yield*/, this.transport.connect({
                                url: url,
                                header: {},
                                protocols: [],
                                tcpNoDelay: true,
                                transferFormat: transferFormat
                            })];
                    case 2:
                        // We should just call connect directly in this case.
                        // No fallback or negotiate in this case.
                        _a.sent();
                        return [3 /*break*/, 4];
                    case 3: throw Error("Negotiation can only be skipped when using the WxSocket transport directly.");
                    case 4: return [3 /*break*/, 11];
                    case 5:
                        negotiateResponse = null;
                        redirects = 0;
                        _loop_1 = function () {
                            var accessToken_1;
                            return __generator(this, function (_a) {
                                switch (_a.label) {
                                    case 0: return [4 /*yield*/, this_1.getNegotiationResponse(url)];
                                    case 1:
                                        negotiateResponse = _a.sent();
                                        // the user tries to stop the connection when it is being started
                                        if (this_1.connectionState === 2 /* Disconnected */) {
                                            return [2 /*return*/, { value: void 0 }];
                                        }
                                        if (negotiateResponse.error) {
                                            throw Error(negotiateResponse.error);
                                        }
                                        if (negotiateResponse.ProtocolVersion) {
                                            throw Error("检测到尝试连接到一个 非 ASP.NET Core 服务器。此客户端仅支持连接到ASP.NET Core 服务器。. See https://aka.ms/signalr-core-differences for details.");
                                        }
                                        if (negotiateResponse.url) {
                                            url = negotiateResponse.url;
                                        }
                                        if (negotiateResponse.accessToken) {
                                            accessToken_1 = negotiateResponse.accessToken;
                                            // ! 通过 /negotiate 接口返回的assessToken 仅支持 accessTokenFactory(),如果实现了 socketUrlFactory(),会忽略掉这个token
                                            this_1.accessTokenFactory = function () { return accessToken_1; };
                                        }
                                        redirects++;
                                        return [2 /*return*/];
                                }
                            });
                        };
                        this_1 = this;
                        _a.label = 6;
                    case 6: return [5 /*yield**/, _loop_1()];
                    case 7:
                        state_1 = _a.sent();
                        if (typeof state_1 === "object")
                            return [2 /*return*/, state_1.value];
                        _a.label = 8;
                    case 8:
                        if (negotiateResponse.url && redirects < MAX_REDIRECTS) return [3 /*break*/, 6];
                        _a.label = 9;
                    case 9:
                        if (redirects === MAX_REDIRECTS && negotiateResponse.url) {
                            throw Error("Negotiate redirection limit exceeded. -fy : 超出协商重定向限制");
                        }
                        return [4 /*yield*/, this.createTransport(url, this.options.transport, negotiateResponse, transferFormat)];
                    case 10:
                        _a.sent();
                        _a.label = 11;
                    case 11:
                        if (this.transport instanceof LongPollingTransport) {
                            this.features.inherentKeepAlive = true;
                        }
                        this.transport.onreceive = this.onreceive;
                        this.transport.onclose = function (e) { return _this.stopConnection(e); };
                        // only change the state if we were connecting to not overwrite
                        // the state if the connection is already marked as Disconnected
                        this.changeState(0 /* Connecting */, 1 /* Connected */);
                        return [2 /*return*/];
                    case 12:
                        e_2 = _a.sent();
                        this.logger.log(LogLevel.Error, "Failed to start the connection: ", e_2);
                        this.connectionState = 2 /* Disconnected */;
                        this.transport = undefined;
                        throw e_2;
                    case 13: return [2 /*return*/];
                }
            });
        });
    };
    HttpConnection.prototype.getNegotiationResponse = function (url) {
        return __awaiter(this, void 0, void 0, function () {
            var headers, token, negotiateUrl, response, e_3;
            var _a;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        if (!this.accessTokenFactory) return [3 /*break*/, 2];
                        return [4 /*yield*/, this.accessTokenFactory()];
                    case 1:
                        token = _b.sent();
                        if (token) {
                            headers = (_a = {},
                                _a["Authorization"] = "Bearer " + token,
                                _a);
                        }
                        _b.label = 2;
                    case 2:
                        negotiateUrl = this.resolveNegotiateUrl(url);
                        this.logger.log(LogLevel.Debug, "Sending negotiation request: " + negotiateUrl + ".");
                        _b.label = 3;
                    case 3:
                        _b.trys.push([3, 5, , 6]);
                        return [4 /*yield*/, this.request.post(negotiateUrl, {}, {
                                headers: headers,
                                responseType: ResponseType.TEXT
                            })];
                    case 4:
                        response = _b.sent();
                        if (response.statusCode !== 200) {
                            throw Error("Unexpected status code returned from negotiate " + response.statusCode);
                        }
                        return [2 /*return*/, JSON.parse(response.data)];
                    case 5:
                        e_3 = _b.sent();
                        this.logger.log(LogLevel.Error, "Failed to complete negotiation with the server: ", e_3);
                        throw e_3;
                    case 6: return [2 /*return*/];
                }
            });
        });
    };
    HttpConnection.prototype.createConnectUrl = function (url, connectionId) {
        if (!connectionId) {
            return url;
        }
        return url + (url.indexOf("?") === -1 ? "?" : "&") + ("id=" + connectionId);
    };
    HttpConnection.prototype.createTransport = function (url, requestedTransport, negotiateResponse, requestedTransferFormat) {
        return __awaiter(this, void 0, void 0, function () {
            var connectUrl, transports, _i, transports_1, endpoint, transport, ex_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        connectUrl = this.createConnectUrl(url, negotiateResponse.connectionId);
                        if (!this.isITransport(requestedTransport)) return [3 /*break*/, 2];
                        this.logger.log(LogLevel.Debug, "Connection was provided an instance of ITransport, using that directly.");
                        this.transport = requestedTransport;
                        return [4 /*yield*/, this.transport.connect({
                                url: connectUrl,
                                transferFormat: requestedTransferFormat
                            })];
                    case 1:
                        _a.sent();
                        // only change the state if we were connecting to not overwrite
                        // the state if the connection is already marked as Disconnected
                        this.changeState(0 /* Connecting */, 1 /* Connected */);
                        return [2 /*return*/];
                    case 2:
                        transports = negotiateResponse.availableTransports || [];
                        _i = 0, transports_1 = transports;
                        _a.label = 3;
                    case 3:
                        if (!(_i < transports_1.length)) return [3 /*break*/, 9];
                        endpoint = transports_1[_i];
                        this.connectionState = 0 /* Connecting */;
                        transport = this.resolveTransport(endpoint, requestedTransport, requestedTransferFormat);
                        if (!(typeof transport === "number")) return [3 /*break*/, 8];
                        this.transport = this.constructTransport(transport);
                        if (!!negotiateResponse.connectionId) return [3 /*break*/, 5];
                        return [4 /*yield*/, this.getNegotiationResponse(url)];
                    case 4:
                        negotiateResponse = _a.sent();
                        connectUrl = this.createConnectUrl(url, negotiateResponse.connectionId);
                        _a.label = 5;
                    case 5:
                        _a.trys.push([5, 7, , 8]);
                        return [4 /*yield*/, this.transport.connect({
                                url: connectUrl,
                                transferFormat: requestedTransferFormat
                            })];
                    case 6:
                        _a.sent();
                        this.changeState(0 /* Connecting */, 1 /* Connected */);
                        return [2 /*return*/];
                    case 7:
                        ex_1 = _a.sent();
                        this.logger.log(LogLevel.Error, "Failed to start the transport '" + HttpTransportType[transport] + "':", ex_1);
                        this.connectionState = 2 /* Disconnected */;
                        negotiateResponse.connectionId = undefined;
                        return [3 /*break*/, 8];
                    case 8:
                        _i++;
                        return [3 /*break*/, 3];
                    case 9: throw new Error("Unable to initialize any of the available transports.");
                }
            });
        });
    };
    /**
     *
     * @description 这里对原来的实例化方式进行了改写,如果传入的是实例化完成的 Transport ,将直接返回
     *  如果是传入继承 Transport的 class,将执行 new Transport(options)
     * - 这里对原生的多项入参合并成了options(这点差异需要注意)
     * @private
     * @param {HttpTransportType} transport
     * @returns
     * @memberof HttpConnection
     */
    HttpConnection.prototype.constructTransport = function (transport) {
        var _a = this.options, WxSocket = _a.WxSocket, LongPolling = _a.LongPolling, wxSocketTransportOptions = _a.wxSocketTransportOptions, longPollingTransportOptions = _a.longPollingTransportOptions;
        switch (transport) {
            case HttpTransportType.WebSockets: // wx socket 方式
                if (WxSocket instanceof WxSocketTransport) {
                    return WxSocket;
                }
                else {
                    return new WxSocket(wxSocketTransportOptions
                        ? wxSocketTransportOptions
                        : {
                            // token 工厂
                            accessTokenFactory: this.accessTokenFactory,
                            // socket 单独实现一个socket url factory(用于后端改了 accecc_token 参数名的场景)
                            socketUrlFactory: this.socketUrlFactory,
                            // logger
                            logger: this.logger,
                            logMessageContent: this.options.logMessageContent || false,
                            /** 是否允许替换socket连接
                             *
                             * 小程序 版本 < 1.7.0 时, 最多允许存在一个socket连接, 此参数用于是否允许在这个情况下,替换这个打开的socket
                             */
                            allowReplaceSocket: true,
                            /** 是否启用消息队列缓存连接建立前消息,并在建立连接后发送 */
                            enableMessageQueue: this.options.enableMessageQueue == undefined ? true : this.options.enableMessageQueue,
                            /** 重连设置 */
                            reconnect: {
                                enable: true,
                                max: 3
                            }
                        });
                }
            case HttpTransportType.LongPolling: // 长轮询方式
                if (LongPolling instanceof LongPollingTransport) {
                    return LongPolling;
                }
                else {
                    return new LongPolling(longPollingTransportOptions
                        ? longPollingTransportOptions
                        : {
                            request: this.request,
                            accessTokenFactory: this.accessTokenFactory,
                            logger: this.logger,
                            logMessageContent: this.options.logMessageContent || false
                        });
                }
            default:
                throw new Error("Unknown transport: " + transport + ".");
        }
    };
    HttpConnection.prototype.resolveTransport = function (endpoint, requestedTransport, requestedTransferFormat) {
        var transport = HttpTransportType[endpoint.transport];
        if (transport === null || transport === undefined) {
            this.logger.log(LogLevel.Debug, "Skipping transport '" + endpoint.transport + "' because it is not supported by this client.");
        }
        else {
            var transferFormats = endpoint.transferFormats.map(function (s) { return TransferFormat[s]; });
            if (transportMatches(requestedTransport, transport)) {
                if (transferFormats.indexOf(requestedTransferFormat) >= 0) {
                    if (transport === HttpTransportType.WebSockets && !this.options.WxSocket) {
                        this.logger.log(LogLevel.Debug, "Skipping transport '" + HttpTransportType[transport] + "' because it is not supported in your environment.'");
                    }
                    else {
                        this.logger.log(LogLevel.Debug, "Selecting transport '" + HttpTransportType[transport] + "'.");
                        return transport;
                    }
                }
                else {
                    this.logger.log(LogLevel.Debug, "Skipping transport '" + HttpTransportType[transport] + "' because it does not support the requested transfer format '" + TransferFormat[requestedTransferFormat] + "'.");
                }
            }
            else {
                this.logger.log(LogLevel.Debug, "Skipping transport '" + HttpTransportType[transport] + "' because it was disabled by the client.");
            }
        }
        return null;
    };
    HttpConnection.prototype.isITransport = function (transport) {
        return transport && typeof transport === "object" && "connect" in transport;
    };
    HttpConnection.prototype.changeState = function (from, to) {
        if (this.connectionState === from) {
            this.connectionState = to;
            return true;
        }
        return false;
    };
    HttpConnection.prototype.stopConnection = function (error) {
        this.transport = undefined;
        // If we have a stopError, it takes precedence over the error from the transport
        error = this.stopError || error;
        if (error) {
            this.logger.log(LogLevel.Error, "Connection disconnected with error '" + error + "'.");
        }
        else {
            this.logger.log(LogLevel.Information, "Connection disconnected.");
        }
        this.connectionState = 2 /* Disconnected */;
        if (this.onclose) {
            this.onclose(error);
        }
    };
    /**
     * ! 由于小程序内必须指定 BaseUrl 关系,这里如果不是全路径的话，暂时直接抛出异常
     * @param url
     */
    HttpConnection.prototype.resolveUrl = function (url) {
        // startsWith is not supported in IE
        if (url.lastIndexOf("https://", 0) === 0 || url.lastIndexOf("http://", 0) === 0) {
            return url;
        }
        else {
            throw new Error("HttpConnection. \u89E3\u6790url\u9519\u8BEF,\u5C0F\u7A0B\u5E8F\u5185\u9700\u8981\u4F20\u5165\u5168\u8DEF\u5F84 ->link: " + url);
        }
    };
    HttpConnection.prototype.resolveNegotiateUrl = function (url) {
        var index = url.indexOf("?");
        var negotiateUrl = url.substring(0, index === -1 ? url.length : index);
        if (negotiateUrl[negotiateUrl.length - 1] !== "/") {
            negotiateUrl += "/";
        }
        negotiateUrl += "negotiate";
        negotiateUrl += index === -1 ? "" : url.substring(index);
        return negotiateUrl;
    };
    return HttpConnection;
}());
export { HttpConnection };
function transportMatches(requestedTransport, actualTransport) {
    return !requestedTransport || (actualTransport & requestedTransport) !== 0;
}