{"version":3,"file":"SilentHandler.js","sources":["../../src/interaction_handler/SilentHandler.ts"],"sourcesContent":["/*\r\n * Copyright (c) Microsoft Corporation. All rights reserved.\r\n * Licensed under the MIT License.\r\n */\r\n\r\nimport { UrlString, StringUtils, CommonAuthorizationCodeRequest, AuthorizationCodeClient, Constants, Logger, IPerformanceClient, PerformanceEvents } from \"@azure/msal-common\";\r\nimport { InteractionHandler } from \"./InteractionHandler\";\r\nimport { BrowserAuthError } from \"../error/BrowserAuthError\";\r\nimport { BrowserCacheManager } from \"../cache/BrowserCacheManager\";\r\nimport { BrowserSystemOptions, DEFAULT_IFRAME_TIMEOUT_MS } from \"../config/Configuration\";\r\n\r\nexport class SilentHandler extends InteractionHandler {\r\n\r\n    private navigateFrameWait: number;\r\n    private pollIntervalMilliseconds: number;\r\n\r\n    constructor(authCodeModule: AuthorizationCodeClient, storageImpl: BrowserCacheManager, authCodeRequest: CommonAuthorizationCodeRequest, logger: Logger, systemOptions: Required<Pick<BrowserSystemOptions, \"navigateFrameWait\" | \"pollIntervalMilliseconds\">>, performanceClient: IPerformanceClient) {\r\n        super(authCodeModule, storageImpl, authCodeRequest, logger, performanceClient);\r\n        this.navigateFrameWait = systemOptions.navigateFrameWait;\r\n        this.pollIntervalMilliseconds = systemOptions.pollIntervalMilliseconds;\r\n    }\r\n\r\n    /**\r\n     * Creates a hidden iframe to given URL using user-requested scopes as an id.\r\n     * @param urlNavigate\r\n     * @param userRequestScopes\r\n     */\r\n    async initiateAuthRequest(requestUrl: string): Promise<HTMLIFrameElement> {\r\n        this.performanceClient.addQueueMeasurement(PerformanceEvents.SilentHandlerInitiateAuthRequest, this.authCodeRequest.correlationId);\r\n\r\n        if (StringUtils.isEmpty(requestUrl)) {\r\n            // Throw error if request URL is empty.\r\n            this.logger.info(\"Navigate url is empty\");\r\n            throw BrowserAuthError.createEmptyNavigationUriError();\r\n        }\r\n\r\n        if (this.navigateFrameWait) {\r\n            this.performanceClient.setPreQueueTime(PerformanceEvents.SilentHandlerLoadFrame, this.authCodeRequest.correlationId);\r\n            return await this.loadFrame(requestUrl);\r\n        }\r\n        return this.loadFrameSync(requestUrl);\r\n    }\r\n\r\n    /**\r\n     * Monitors an iframe content window until it loads a url with a known hash, or hits a specified timeout.\r\n     * @param iframe\r\n     * @param timeout\r\n     */\r\n    monitorIframeForHash(iframe: HTMLIFrameElement, timeout: number): Promise<string> {\r\n        this.performanceClient.addQueueMeasurement(PerformanceEvents.SilentHandlerMonitorIframeForHash, this.authCodeRequest.correlationId);\r\n\r\n        return new Promise((resolve, reject) => {\r\n            if (timeout < DEFAULT_IFRAME_TIMEOUT_MS) {\r\n                this.logger.warning(`system.loadFrameTimeout or system.iframeHashTimeout set to lower (${timeout}ms) than the default (${DEFAULT_IFRAME_TIMEOUT_MS}ms). This may result in timeouts.`);\r\n            }\r\n\r\n            /*\r\n             * Polling for iframes can be purely timing based,\r\n             * since we don't need to account for interaction.\r\n             */\r\n            const nowMark = window.performance.now();\r\n            const timeoutMark = nowMark + timeout;\r\n\r\n            const intervalId = setInterval(() => {\r\n                if (window.performance.now() > timeoutMark) {\r\n                    this.removeHiddenIframe(iframe);\r\n                    clearInterval(intervalId);\r\n                    reject(BrowserAuthError.createMonitorIframeTimeoutError());\r\n                    return;\r\n                }\r\n\r\n                let href: string = Constants.EMPTY_STRING;\r\n                const contentWindow = iframe.contentWindow;\r\n                try {\r\n                    /*\r\n                     * Will throw if cross origin,\r\n                     * which should be caught and ignored\r\n                     * since we need the interval to keep running while on STS UI.\r\n                     */\r\n                    href = contentWindow ? contentWindow.location.href : Constants.EMPTY_STRING;\r\n                } catch (e) {}\r\n\r\n                if (StringUtils.isEmpty(href)) {\r\n                    return;\r\n                }\r\n\r\n                const contentHash = contentWindow ? contentWindow.location.hash: Constants.EMPTY_STRING;\r\n                if (UrlString.hashContainsKnownProperties(contentHash)) {\r\n                    // Success case\r\n                    this.removeHiddenIframe(iframe);\r\n                    clearInterval(intervalId);\r\n                    resolve(contentHash);\r\n                    return;\r\n                }\r\n            }, this.pollIntervalMilliseconds);\r\n        });\r\n    }\r\n\r\n    /**\r\n     * @hidden\r\n     * Loads iframe with authorization endpoint URL\r\n     * @ignore\r\n     */\r\n    private loadFrame(urlNavigate: string): Promise<HTMLIFrameElement> {\r\n        this.performanceClient.addQueueMeasurement(PerformanceEvents.SilentHandlerLoadFrame, this.authCodeRequest.correlationId);\r\n\r\n        /*\r\n         * This trick overcomes iframe navigation in IE\r\n         * IE does not load the page consistently in iframe\r\n         */\r\n\r\n        return new Promise((resolve, reject) => {\r\n            const frameHandle = this.createHiddenIframe();\r\n\r\n            setTimeout(() => {\r\n                if (!frameHandle) {\r\n                    reject(\"Unable to load iframe\");\r\n                    return;\r\n                }\r\n\r\n                frameHandle.src = urlNavigate;\r\n\r\n                resolve(frameHandle);\r\n            }, this.navigateFrameWait);\r\n        });\r\n    }\r\n\r\n    /**\r\n     * @hidden\r\n     * Loads the iframe synchronously when the navigateTimeFrame is set to `0`\r\n     * @param urlNavigate\r\n     * @param frameName\r\n     * @param logger\r\n     */\r\n    private loadFrameSync(urlNavigate: string): HTMLIFrameElement{\r\n        const frameHandle = this.createHiddenIframe();\r\n\r\n        frameHandle.src = urlNavigate;\r\n\r\n        return frameHandle;\r\n    }\r\n\r\n    /**\r\n     * @hidden\r\n     * Creates a new hidden iframe or gets an existing one for silent token renewal.\r\n     * @ignore\r\n     */\r\n    private createHiddenIframe(): HTMLIFrameElement {\r\n        const authFrame = document.createElement(\"iframe\");\r\n\r\n        authFrame.style.visibility = \"hidden\";\r\n        authFrame.style.position = \"absolute\";\r\n        authFrame.style.width = authFrame.style.height = \"0\";\r\n        authFrame.style.border = \"0\";\r\n        authFrame.setAttribute(\"sandbox\", \"allow-scripts allow-same-origin allow-forms\");\r\n        document.getElementsByTagName(\"body\")[0].appendChild(authFrame);\r\n\r\n        return authFrame;\r\n    }\r\n\r\n    /**\r\n     * @hidden\r\n     * Removes a hidden iframe from the page.\r\n     * @ignore\r\n     */\r\n    private removeHiddenIframe(iframe: HTMLIFrameElement): void {\r\n        if (document.body === iframe.parentNode) {\r\n            document.body.removeChild(iframe);\r\n        }\r\n    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