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