VLEX/BPM-UI/node_modules/@aspnet/signalr/dist/esm/LongPollingTransport.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 { AbortController } from "./AbortController";
import { HttpError, TimeoutError } from "./Errors";
import { LogLevel } from "./ILogger";
import { TransferFormat } from "./ITransport";
import { Arg, getDataDetail, sendMessage } from "./Utils";
// Not exported from 'index', this type is internal.
/** @private */
var LongPollingTransport = /** @class */ (function () {
    function LongPollingTransport(httpClient, accessTokenFactory, logger, logMessageContent) {
        this.httpClient = httpClient;
        this.accessTokenFactory = accessTokenFactory;
        this.logger = logger;
        this.pollAbort = new AbortController();
        this.logMessageContent = logMessageContent;
        this.running = false;
        this.onreceive = null;
        this.onclose = null;
    }
    Object.defineProperty(LongPollingTransport.prototype, "pollAborted", {
        // This is an internal type, not exported from 'index' so this is really just internal.
        get: function () {
            return this.pollAbort.aborted;
        },
        enumerable: true,
        configurable: true
    });
    LongPollingTransport.prototype.connect = function (url, transferFormat) {
        return __awaiter(this, void 0, void 0, function () {
            var pollOptions, token, pollUrl, response;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        Arg.isRequired(url, "url");
                        Arg.isRequired(transferFormat, "transferFormat");
                        Arg.isIn(transferFormat, TransferFormat, "transferFormat");
                        this.url = url;
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) Connecting.");
                        // Allow binary format on Node and Browsers that support binary content (indicated by the presence of responseType property)
                        if (transferFormat === TransferFormat.Binary &&
                            (typeof XMLHttpRequest !== "undefined" && typeof new XMLHttpRequest().responseType !== "string")) {
                            throw new Error("Binary protocols over XmlHttpRequest not implementing advanced features are not supported.");
                        }
                        pollOptions = {
                            abortSignal: this.pollAbort.signal,
                            headers: {},
                            timeout: 100000,
                        };
                        if (transferFormat === TransferFormat.Binary) {
                            pollOptions.responseType = "arraybuffer";
                        }
                        return [4 /*yield*/, this.getAccessToken()];
                    case 1:
                        token = _a.sent();
                        this.updateHeaderToken(pollOptions, token);
                        pollUrl = url + "&_=" + Date.now();
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) polling: " + pollUrl + ".");
                        return [4 /*yield*/, this.httpClient.get(pollUrl, pollOptions)];
                    case 2:
                        response = _a.sent();
                        if (response.statusCode !== 200) {
                            this.logger.log(LogLevel.Error, "(LongPolling transport) Unexpected response code: " + response.statusCode + ".");
                            // Mark running as false so that the poll immediately ends and runs the close logic
                            this.closeError = new HttpError(response.statusText || "", response.statusCode);
                            this.running = false;
                        }
                        else {
                            this.running = true;
                        }
                        this.receiving = this.poll(this.url, pollOptions);
                        return [2 /*return*/];
                }
            });
        });
    };
    LongPollingTransport.prototype.getAccessToken = function () {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        if (!this.accessTokenFactory) return [3 /*break*/, 2];
                        return [4 /*yield*/, this.accessTokenFactory()];
                    case 1: return [2 /*return*/, _a.sent()];
                    case 2: return [2 /*return*/, null];
                }
            });
        });
    };
    LongPollingTransport.prototype.updateHeaderToken = function (request, token) {
        if (!request.headers) {
            request.headers = {};
        }
        if (token) {
            // tslint:disable-next-line:no-string-literal
            request.headers["Authorization"] = "Bearer " + token;
            return;
        }
        // tslint:disable-next-line:no-string-literal
        if (request.headers["Authorization"]) {
            // tslint:disable-next-line:no-string-literal
            delete request.headers["Authorization"];
        }
    };
    LongPollingTransport.prototype.poll = function (url, pollOptions) {
        return __awaiter(this, void 0, void 0, function () {
            var token, pollUrl, response, e_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        _a.trys.push([0, , 8, 9]);
                        _a.label = 1;
                    case 1:
                        if (!this.running) return [3 /*break*/, 7];
                        return [4 /*yield*/, this.getAccessToken()];
                    case 2:
                        token = _a.sent();
                        this.updateHeaderToken(pollOptions, token);
                        _a.label = 3;
                    case 3:
                        _a.trys.push([3, 5, , 6]);
                        pollUrl = url + "&_=" + Date.now();
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) polling: " + pollUrl + ".");
                        return [4 /*yield*/, this.httpClient.get(pollUrl, pollOptions)];
                    case 4:
                        response = _a.sent();
                        if (response.statusCode === 204) {
                            this.logger.log(LogLevel.Information, "(LongPolling transport) Poll terminated by server.");
                            this.running = false;
                        }
                        else if (response.statusCode !== 200) {
                            this.logger.log(LogLevel.Error, "(LongPolling transport) Unexpected response code: " + response.statusCode + ".");
                            // Unexpected status code
                            this.closeError = new HttpError(response.statusText || "", response.statusCode);
                            this.running = false;
                        }
                        else {
                            // Process the response
                            if (response.content) {
                                this.logger.log(LogLevel.Trace, "(LongPolling transport) data received. " + getDataDetail(response.content, this.logMessageContent) + ".");
                                if (this.onreceive) {
                                    this.onreceive(response.content);
                                }
                            }
                            else {
                                // This is another way timeout manifest.
                                this.logger.log(LogLevel.Trace, "(LongPolling transport) Poll timed out, reissuing.");
                            }
                        }
                        return [3 /*break*/, 6];
                    case 5:
                        e_1 = _a.sent();
                        if (!this.running) {
                            // Log but disregard errors that occur after stopping
                            this.logger.log(LogLevel.Trace, "(LongPolling transport) Poll errored after shutdown: " + e_1.message);
                        }
                        else {
                            if (e_1 instanceof TimeoutError) {
                                // Ignore timeouts and reissue the poll.
                                this.logger.log(LogLevel.Trace, "(LongPolling transport) Poll timed out, reissuing.");
                            }
                            else {
                                // Close the connection with the error as the result.
                                this.closeError = e_1;
                                this.running = false;
                            }
                        }
                        return [3 /*break*/, 6];
                    case 6: return [3 /*break*/, 1];
                    case 7: return [3 /*break*/, 9];
                    case 8:
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) Polling complete.");
                        // We will reach here with pollAborted==false when the server returned a response causing the transport to stop.
                        // If pollAborted==true then client initiated the stop and the stop method will raise the close event after DELETE is sent.
                        if (!this.pollAborted) {
                            this.raiseOnClose();
                        }
                        return [7 /*endfinally*/];
                    case 9: return [2 /*return*/];
                }
            });
        });
    };
    LongPollingTransport.prototype.send = function (data) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                if (!this.running) {
                    return [2 /*return*/, Promise.reject(new Error("Cannot send until the transport is connected"))];
                }
                return [2 /*return*/, sendMessage(this.logger, "LongPolling", this.httpClient, this.url, this.accessTokenFactory, data, this.logMessageContent)];
            });
        });
    };
    LongPollingTransport.prototype.stop = function () {
        return __awaiter(this, void 0, void 0, function () {
            var deleteOptions, token;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) Stopping polling.");
                        // Tell receiving loop to stop, abort any current request, and then wait for it to finish
                        this.running = false;
                        this.pollAbort.abort();
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, , 5, 6]);
                        return [4 /*yield*/, this.receiving];
                    case 2:
                        _a.sent();
                        // Send DELETE to clean up long polling on the server
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) sending DELETE request to " + this.url + ".");
                        deleteOptions = {
                            headers: {},
                        };
                        return [4 /*yield*/, this.getAccessToken()];
                    case 3:
                        token = _a.sent();
                        this.updateHeaderToken(deleteOptions, token);
                        return [4 /*yield*/, this.httpClient.delete(this.url, deleteOptions)];
                    case 4:
                        _a.sent();
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) DELETE request sent.");
                        return [3 /*break*/, 6];
                    case 5:
                        this.logger.log(LogLevel.Trace, "(LongPolling transport) Stop finished.");
                        // Raise close event here instead of in polling
                        // It needs to happen after the DELETE request is sent
                        this.raiseOnClose();
                        return [7 /*endfinally*/];
                    case 6: return [2 /*return*/];
                }
            });
        });
    };
    LongPollingTransport.prototype.raiseOnClose = function () {
        if (this.onclose) {
            var logMessage = "(LongPolling transport) Firing onclose event.";
            if (this.closeError) {
                logMessage += " Error: " + this.closeError;
            }
            this.logger.log(LogLevel.Trace, logMessage);
            this.onclose(this.closeError);
        }
    };
    return LongPollingTransport;
}());
export { LongPollingTransport };
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