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Viewing file:     client.js (24.31 KB)      -rw-r--r--

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var __spreadArrays = (this && this.__spreadArrays) || function () {
    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
    for (var r = Array(s), k = 0, i = 0; i < il; i++)
        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
            r[k] = a[j];
    return r;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SubscriptionClient = void 0;
var _global = typeof global !== 'undefined' ? global : (typeof window !== 'undefined' ? window : {});
var NativeWebSocket = _global.WebSocket || _global.MozWebSocket;
var Backoff = require("backo2");
var eventemitter3_1 = require("eventemitter3");
var is_string_1 = require("./utils/is-string");
var is_object_1 = require("./utils/is-object");
var printer_1 = require("graphql/language/printer");
var getOperationAST_1 = require("graphql/utilities/getOperationAST");
var symbol_observable_1 = require("symbol-observable");
var protocol_1 = require("./protocol");
var defaults_1 = require("./defaults");
var message_types_1 = require("./message-types");
var SubscriptionClient = (function () {
    function SubscriptionClient(url, options, webSocketImpl, webSocketProtocols) {
        var _a = (options || {}), _b = _a.connectionCallback, connectionCallback = _b === void 0 ? undefined : _b, _c = _a.connectionParams, connectionParams = _c === void 0 ? {} : _c, _d = _a.minTimeout, minTimeout = _d === void 0 ? defaults_1.MIN_WS_TIMEOUT : _d, _e = _a.timeout, timeout = _e === void 0 ? defaults_1.WS_TIMEOUT : _e, _f = _a.reconnect, reconnect = _f === void 0 ? false : _f, _g = _a.reconnectionAttempts, reconnectionAttempts = _g === void 0 ? Infinity : _g, _h = _a.lazy, lazy = _h === void 0 ? false : _h, _j = _a.inactivityTimeout, inactivityTimeout = _j === void 0 ? 0 : _j, _k = _a.wsOptionArguments, wsOptionArguments = _k === void 0 ? [] : _k;
        this.wsImpl = webSocketImpl || NativeWebSocket;
        if (!this.wsImpl) {
            throw new Error('Unable to find native implementation, or alternative implementation for WebSocket!');
        }
        this.wsProtocols = webSocketProtocols || protocol_1.GRAPHQL_WS;
        this.connectionCallback = connectionCallback;
        this.url = url;
        this.operations = {};
        this.nextOperationId = 0;
        this.minWsTimeout = minTimeout;
        this.wsTimeout = timeout;
        this.unsentMessagesQueue = [];
        this.reconnect = reconnect;
        this.reconnecting = false;
        this.reconnectionAttempts = reconnectionAttempts;
        this.lazy = !!lazy;
        this.inactivityTimeout = inactivityTimeout;
        this.closedByUser = false;
        this.backoff = new Backoff({ jitter: 0.5 });
        this.eventEmitter = new eventemitter3_1.EventEmitter();
        this.middlewares = [];
        this.client = null;
        this.maxConnectTimeGenerator = this.createMaxConnectTimeGenerator();
        this.connectionParams = this.getConnectionParams(connectionParams);
        this.wsOptionArguments = wsOptionArguments;
        if (!this.lazy) {
            this.connect();
        }
    }
    Object.defineProperty(SubscriptionClient.prototype, "status", {
        get: function () {
            if (this.client === null) {
                return this.wsImpl.CLOSED;
            }
            return this.client.readyState;
        },
        enumerable: false,
        configurable: true
    });
    SubscriptionClient.prototype.close = function (isForced, closedByUser) {
        if (isForced === void 0) { isForced = true; }
        if (closedByUser === void 0) { closedByUser = true; }
        this.clearInactivityTimeout();
        if (this.client !== null) {
            this.closedByUser = closedByUser;
            if (isForced) {
                this.clearCheckConnectionInterval();
                this.clearMaxConnectTimeout();
                this.clearTryReconnectTimeout();
                this.unsubscribeAll();
                this.sendMessage(undefined, message_types_1.default.GQL_CONNECTION_TERMINATE, null);
            }
            this.client.close();
            this.client.onopen = null;
            this.client.onclose = null;
            this.client.onerror = null;
            this.client.onmessage = null;
            this.client = null;
            this.eventEmitter.emit('disconnected');
            if (!isForced) {
                this.tryReconnect();
            }
        }
    };
    SubscriptionClient.prototype.request = function (request) {
        var _a;
        var getObserver = this.getObserver.bind(this);
        var executeOperation = this.executeOperation.bind(this);
        var unsubscribe = this.unsubscribe.bind(this);
        var opId;
        this.clearInactivityTimeout();
        return _a = {},
            _a[symbol_observable_1.default] = function () {
                return this;
            },
            _a.subscribe = function (observerOrNext, onError, onComplete) {
                var observer = getObserver(observerOrNext, onError, onComplete);
                opId = executeOperation(request, function (error, result) {
                    if (error === null && result === null) {
                        if (observer.complete) {
                            observer.complete();
                        }
                    }
                    else if (error) {
                        if (observer.error) {
                            observer.error(error[0]);
                        }
                    }
                    else {
                        if (observer.next) {
                            observer.next(result);
                        }
                    }
                });
                return {
                    unsubscribe: function () {
                        if (opId) {
                            unsubscribe(opId);
                            opId = null;
                        }
                    },
                };
            },
            _a;
    };
    SubscriptionClient.prototype.on = function (eventName, callback, context) {
        var handler = this.eventEmitter.on(eventName, callback, context);
        return function () {
            handler.off(eventName, callback, context);
        };
    };
    SubscriptionClient.prototype.onConnected = function (callback, context) {
        return this.on('connected', callback, context);
    };
    SubscriptionClient.prototype.onConnecting = function (callback, context) {
        return this.on('connecting', callback, context);
    };
    SubscriptionClient.prototype.onDisconnected = function (callback, context) {
        return this.on('disconnected', callback, context);
    };
    SubscriptionClient.prototype.onReconnected = function (callback, context) {
        return this.on('reconnected', callback, context);
    };
    SubscriptionClient.prototype.onReconnecting = function (callback, context) {
        return this.on('reconnecting', callback, context);
    };
    SubscriptionClient.prototype.onError = function (callback, context) {
        return this.on('error', callback, context);
    };
    SubscriptionClient.prototype.unsubscribeAll = function () {
        var _this = this;
        Object.keys(this.operations).forEach(function (subId) {
            _this.unsubscribe(subId);
        });
    };
    SubscriptionClient.prototype.applyMiddlewares = function (options) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            var queue = function (funcs, scope) {
                var next = function (error) {
                    if (error) {
                        reject(error);
                    }
                    else {
                        if (funcs.length > 0) {
                            var f = funcs.shift();
                            if (f) {
                                f.applyMiddleware.apply(scope, [options, next]);
                            }
                        }
                        else {
                            resolve(options);
                        }
                    }
                };
                next();
            };
            queue(__spreadArrays(_this.middlewares), _this);
        });
    };
    SubscriptionClient.prototype.use = function (middlewares) {
        var _this = this;
        middlewares.map(function (middleware) {
            if (typeof middleware.applyMiddleware === 'function') {
                _this.middlewares.push(middleware);
            }
            else {
                throw new Error('Middleware must implement the applyMiddleware function.');
            }
        });
        return this;
    };
    SubscriptionClient.prototype.getConnectionParams = function (connectionParams) {
        return function () { return new Promise(function (resolve, reject) {
            if (typeof connectionParams === 'function') {
                try {
                    return resolve(connectionParams.call(null));
                }
                catch (error) {
                    return reject(error);
                }
            }
            resolve(connectionParams);
        }); };
    };
    SubscriptionClient.prototype.executeOperation = function (options, handler) {
        var _this = this;
        if (this.client === null) {
            this.connect();
        }
        var opId = this.generateOperationId();
        this.operations[opId] = { options: options, handler: handler };
        this.applyMiddlewares(options)
            .then(function (processedOptions) {
            _this.checkOperationOptions(processedOptions, handler);
            if (_this.operations[opId]) {
                _this.operations[opId] = { options: processedOptions, handler: handler };
                _this.sendMessage(opId, message_types_1.default.GQL_START, processedOptions);
            }
        })
            .catch(function (error) {
            _this.unsubscribe(opId);
            handler(_this.formatErrors(error));
        });
        return opId;
    };
    SubscriptionClient.prototype.getObserver = function (observerOrNext, error, complete) {
        if (typeof observerOrNext === 'function') {
            return {
                next: function (v) { return observerOrNext(v); },
                error: function (e) { return error && error(e); },
                complete: function () { return complete && complete(); },
            };
        }
        return observerOrNext;
    };
    SubscriptionClient.prototype.createMaxConnectTimeGenerator = function () {
        var minValue = this.minWsTimeout;
        var maxValue = this.wsTimeout;
        return new Backoff({
            min: minValue,
            max: maxValue,
            factor: 1.2,
        });
    };
    SubscriptionClient.prototype.clearCheckConnectionInterval = function () {
        if (this.checkConnectionIntervalId) {
            clearInterval(this.checkConnectionIntervalId);
            this.checkConnectionIntervalId = null;
        }
    };
    SubscriptionClient.prototype.clearMaxConnectTimeout = function () {
        if (this.maxConnectTimeoutId) {
            clearTimeout(this.maxConnectTimeoutId);
            this.maxConnectTimeoutId = null;
        }
    };
    SubscriptionClient.prototype.clearTryReconnectTimeout = function () {
        if (this.tryReconnectTimeoutId) {
            clearTimeout(this.tryReconnectTimeoutId);
            this.tryReconnectTimeoutId = null;
        }
    };
    SubscriptionClient.prototype.clearInactivityTimeout = function () {
        if (this.inactivityTimeoutId) {
            clearTimeout(this.inactivityTimeoutId);
            this.inactivityTimeoutId = null;
        }
    };
    SubscriptionClient.prototype.setInactivityTimeout = function () {
        var _this = this;
        if (this.inactivityTimeout > 0 && Object.keys(this.operations).length === 0) {
            this.inactivityTimeoutId = setTimeout(function () {
                if (Object.keys(_this.operations).length === 0) {
                    _this.close();
                }
            }, this.inactivityTimeout);
        }
    };
    SubscriptionClient.prototype.checkOperationOptions = function (options, handler) {
        var query = options.query, variables = options.variables, operationName = options.operationName;
        if (!query) {
            throw new Error('Must provide a query.');
        }
        if (!handler) {
            throw new Error('Must provide an handler.');
        }
        if ((!is_string_1.default(query) && !getOperationAST_1.getOperationAST(query, operationName)) ||
            (operationName && !is_string_1.default(operationName)) ||
            (variables && !is_object_1.default(variables))) {
            throw new Error('Incorrect option types. query must be a string or a document,' +
                '`operationName` must be a string, and `variables` must be an object.');
        }
    };
    SubscriptionClient.prototype.buildMessage = function (id, type, payload) {
        var payloadToReturn = payload && payload.query ? __assign(__assign({}, payload), { query: typeof payload.query === 'string' ? payload.query : printer_1.print(payload.query) }) :
            payload;
        return {
            id: id,
            type: type,
            payload: payloadToReturn,
        };
    };
    SubscriptionClient.prototype.formatErrors = function (errors) {
        if (Array.isArray(errors)) {
            return errors;
        }
        if (errors && errors.errors) {
            return this.formatErrors(errors.errors);
        }
        if (errors && errors.message) {
            return [errors];
        }
        return [{
                name: 'FormatedError',
                message: 'Unknown error',
                originalError: errors,
            }];
    };
    SubscriptionClient.prototype.sendMessage = function (id, type, payload) {
        this.sendMessageRaw(this.buildMessage(id, type, payload));
    };
    SubscriptionClient.prototype.sendMessageRaw = function (message) {
        switch (this.status) {
            case this.wsImpl.OPEN:
                var serializedMessage = JSON.stringify(message);
                try {
                    JSON.parse(serializedMessage);
                }
                catch (e) {
                    this.eventEmitter.emit('error', new Error("Message must be JSON-serializable. Got: " + message));
                }
                this.client.send(serializedMessage);
                break;
            case this.wsImpl.CONNECTING:
                this.unsentMessagesQueue.push(message);
                break;
            default:
                if (!this.reconnecting) {
                    this.eventEmitter.emit('error', new Error('A message was not sent because socket is not connected, is closing or ' +
                        'is already closed. Message was: ' + JSON.stringify(message)));
                }
        }
    };
    SubscriptionClient.prototype.generateOperationId = function () {
        return String(++this.nextOperationId);
    };
    SubscriptionClient.prototype.tryReconnect = function () {
        var _this = this;
        if (!this.reconnect || this.backoff.attempts >= this.reconnectionAttempts) {
            return;
        }
        if (!this.reconnecting) {
            Object.keys(this.operations).forEach(function (key) {
                _this.unsentMessagesQueue.push(_this.buildMessage(key, message_types_1.default.GQL_START, _this.operations[key].options));
            });
            this.reconnecting = true;
        }
        this.clearTryReconnectTimeout();
        var delay = this.backoff.duration();
        this.tryReconnectTimeoutId = setTimeout(function () {
            _this.connect();
        }, delay);
    };
    SubscriptionClient.prototype.flushUnsentMessagesQueue = function () {
        var _this = this;
        this.unsentMessagesQueue.forEach(function (message) {
            _this.sendMessageRaw(message);
        });
        this.unsentMessagesQueue = [];
    };
    SubscriptionClient.prototype.checkConnection = function () {
        if (this.wasKeepAliveReceived) {
            this.wasKeepAliveReceived = false;
            return;
        }
        if (!this.reconnecting) {
            this.close(false, true);
        }
    };
    SubscriptionClient.prototype.checkMaxConnectTimeout = function () {
        var _this = this;
        this.clearMaxConnectTimeout();
        this.maxConnectTimeoutId = setTimeout(function () {
            if (_this.status !== _this.wsImpl.OPEN) {
                _this.reconnecting = true;
                _this.close(false, true);
            }
        }, this.maxConnectTimeGenerator.duration());
    };
    SubscriptionClient.prototype.connect = function () {
        var _a;
        var _this = this;
        this.client = new ((_a = this.wsImpl).bind.apply(_a, __spreadArrays([void 0, this.url, this.wsProtocols], this.wsOptionArguments)))();
        this.checkMaxConnectTimeout();
        this.client.onopen = function () { return __awaiter(_this, void 0, void 0, function () {
            var connectionParams, error_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        if (!(this.status === this.wsImpl.OPEN)) return [3, 4];
                        this.clearMaxConnectTimeout();
                        this.closedByUser = false;
                        this.eventEmitter.emit(this.reconnecting ? 'reconnecting' : 'connecting');
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 3, , 4]);
                        return [4, this.connectionParams()];
                    case 2:
                        connectionParams = _a.sent();
                        this.sendMessage(undefined, message_types_1.default.GQL_CONNECTION_INIT, connectionParams);
                        this.flushUnsentMessagesQueue();
                        return [3, 4];
                    case 3:
                        error_1 = _a.sent();
                        this.sendMessage(undefined, message_types_1.default.GQL_CONNECTION_ERROR, error_1);
                        this.flushUnsentMessagesQueue();
                        return [3, 4];
                    case 4: return [2];
                }
            });
        }); };
        this.client.onclose = function () {
            if (!_this.closedByUser) {
                _this.close(false, false);
            }
        };
        this.client.onerror = function (err) {
            _this.eventEmitter.emit('error', err);
        };
        this.client.onmessage = function (_a) {
            var data = _a.data;
            _this.processReceivedData(data);
        };
    };
    SubscriptionClient.prototype.processReceivedData = function (receivedData) {
        var parsedMessage;
        var opId;
        try {
            parsedMessage = JSON.parse(receivedData);
            opId = parsedMessage.id;
        }
        catch (e) {
            throw new Error("Message must be JSON-parseable. Got: " + receivedData);
        }
        if ([message_types_1.default.GQL_DATA,
            message_types_1.default.GQL_COMPLETE,
            message_types_1.default.GQL_ERROR,
        ].indexOf(parsedMessage.type) !== -1 && !this.operations[opId]) {
            this.unsubscribe(opId);
            return;
        }
        switch (parsedMessage.type) {
            case message_types_1.default.GQL_CONNECTION_ERROR:
                if (this.connectionCallback) {
                    this.connectionCallback(parsedMessage.payload);
                }
                break;
            case message_types_1.default.GQL_CONNECTION_ACK:
                this.eventEmitter.emit(this.reconnecting ? 'reconnected' : 'connected', parsedMessage.payload);
                this.reconnecting = false;
                this.backoff.reset();
                this.maxConnectTimeGenerator.reset();
                if (this.connectionCallback) {
                    this.connectionCallback();
                }
                break;
            case message_types_1.default.GQL_COMPLETE:
                var handler = this.operations[opId].handler;
                delete this.operations[opId];
                handler.call(this, null, null);
                break;
            case message_types_1.default.GQL_ERROR:
                this.operations[opId].handler(this.formatErrors(parsedMessage.payload), null);
                delete this.operations[opId];
                break;
            case message_types_1.default.GQL_DATA:
                var parsedPayload = !parsedMessage.payload.errors ?
                    parsedMessage.payload : __assign(__assign({}, parsedMessage.payload), { errors: this.formatErrors(parsedMessage.payload.errors) });
                this.operations[opId].handler(null, parsedPayload);
                break;
            case message_types_1.default.GQL_CONNECTION_KEEP_ALIVE:
                var firstKA = typeof this.wasKeepAliveReceived === 'undefined';
                this.wasKeepAliveReceived = true;
                if (firstKA) {
                    this.checkConnection();
                }
                if (this.checkConnectionIntervalId) {
                    clearInterval(this.checkConnectionIntervalId);
                    this.checkConnection();
                }
                this.checkConnectionIntervalId = setInterval(this.checkConnection.bind(this), this.wsTimeout);
                break;
            default:
                throw new Error('Invalid message type!');
        }
    };
    SubscriptionClient.prototype.unsubscribe = function (opId) {
        if (this.operations[opId]) {
            delete this.operations[opId];
            this.setInactivityTimeout();
            this.sendMessage(opId, message_types_1.default.GQL_STOP, undefined);
        }
    };
    return SubscriptionClient;
}());
exports.SubscriptionClient = SubscriptionClient;
//# sourceMappingURL=client.js.map