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Copyright (c) .NET Foundation. All rights reserved.\r\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\r\n\r\nimport { HttpClient } from \"./HttpClient\";\r\nimport { MessageHeaders } from \"./IHubProtocol\";\r\nimport { ILogger, LogLevel } from \"./ILogger\";\r\nimport { NullLogger } from \"./Loggers\";\r\nimport { IStreamSubscriber, ISubscription } from \"./Stream\";\r\nimport { Subject } from \"./Subject\";\r\n\r\n// Version token that will be replaced by the prepack command\r\n/** The version of the SignalR client. */\r\nexport const VERSION: string = \"0.0.0-DEV_BUILD\";\r\n\r\n/** @private */\r\nexport class Arg {\r\n    public static isRequired(val: any, name: string): void {\r\n        if (val === null || val === undefined) {\r\n            throw new Error(`The '${name}' argument is required.`);\r\n        }\r\n    }\r\n    public static isNotEmpty(val: string, name: string): void {\r\n        if (!val || val.match(/^\\s*$/)) {\r\n            throw new Error(`The '${name}' argument should not be empty.`);\r\n        }\r\n    }\r\n\r\n    public static isIn(val: any, values: any, name: string): void {\r\n        // TypeScript enums have keys for **both** the name and the value of each enum member on the type itself.\r\n        if (!(val in values)) {\r\n            throw new Error(`Unknown ${name} value: ${val}.`);\r\n        }\r\n    }\r\n}\r\n\r\n/** @private */\r\nexport class Platform {\r\n    public static get isBrowser(): boolean {\r\n        return typeof window === \"object\";\r\n    }\r\n\r\n    public static get isWebWorker(): boolean {\r\n        return typeof self === \"object\" && \"importScripts\" in self;\r\n    }\r\n\r\n    public static get isNode(): boolean {\r\n        return !this.isBrowser && !this.isWebWorker;\r\n    }\r\n}\r\n\r\n/** @private */\r\nexport function getDataDetail(data: any, includeContent: boolean): string {\r\n    let detail = \"\";\r\n    if (isArrayBuffer(data)) {\r\n        detail = `Binary data of length ${data.byteLength}`;\r\n        if (includeContent) {\r\n            detail += `. Content: '${formatArrayBuffer(data)}'`;\r\n        }\r\n    } else if (typeof data === \"string\") {\r\n        detail = `String data of length ${data.length}`;\r\n        if (includeContent) {\r\n            detail += `. Content: '${data}'`;\r\n        }\r\n    }\r\n    return detail;\r\n}\r\n\r\n/** @private */\r\nexport function formatArrayBuffer(data: ArrayBuffer): string {\r\n    const view = new Uint8Array(data);\r\n\r\n    // Uint8Array.map only supports returning another Uint8Array?\r\n    let str = \"\";\r\n    view.forEach((num) => {\r\n        const pad = num < 16 ? \"0\" : \"\";\r\n        str += `0x${pad}${num.toString(16)} `;\r\n    });\r\n\r\n    // Trim of trailing space.\r\n    return str.substr(0, str.length - 1);\r\n}\r\n\r\n// Also in signalr-protocol-msgpack/Utils.ts\r\n/** @private */\r\nexport function isArrayBuffer(val: any): val is ArrayBuffer {\r\n    return val && typeof ArrayBuffer !== \"undefined\" &&\r\n        (val instanceof ArrayBuffer ||\r\n            // Sometimes we get an ArrayBuffer that doesn't satisfy instanceof\r\n            (val.constructor && val.constructor.name === \"ArrayBuffer\"));\r\n}\r\n\r\n/** @private */\r\nexport async function sendMessage(logger: ILogger, transportName: string, httpClient: HttpClient, url: string, accessTokenFactory: (() => string | Promise<string>) | undefined,\r\n                                  content: string | ArrayBuffer, logMessageContent: boolean, withCredentials: boolean, defaultHeaders: MessageHeaders): Promise<void> {\r\n    let headers = {};\r\n    if (accessTokenFactory) {\r\n        const token = await accessTokenFactory();\r\n        if (token) {\r\n            headers = {\r\n                [\"Authorization\"]: `Bearer ${token}`,\r\n            };\r\n        }\r\n    }\r\n\r\n    const [name, value] = getUserAgentHeader();\r\n    headers[name] = value;\r\n\r\n    logger.log(LogLevel.Trace, `(${transportName} transport) sending data. ${getDataDetail(content, logMessageContent)}.`);\r\n\r\n    const responseType = isArrayBuffer(content) ? \"arraybuffer\" : \"text\";\r\n    const response = await httpClient.post(url, {\r\n        content,\r\n        headers: { ...headers, ...defaultHeaders},\r\n        responseType,\r\n        withCredentials,\r\n    });\r\n\r\n    logger.log(LogLevel.Trace, `(${transportName} transport) request complete. 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