Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 | 1x 1x 1x 1x 8x 8x 8x | /** * This logic is in a separate file with no dependencies so that it can be * loaded and executed as soon as possible to fulfill the purpose of the protocol * detection technique. The effectiveness of this is obviously subject to how web * apps bundle/consume the blockstack.js lib. */ const GLOBAL_DETECTION_CACHE_KEY = '_blockstackDidCheckEchoReply' const ECHO_REPLY_PARAM = 'echoReply' const AUTH_CONTINUATION_PARAM = 'authContinuation' function getQueryStringParams(query: string): Record<string, string> { if (!query) { return {} } // Trim a starting `?` character if exists const trimmed = /^[?#]/.test(query) ? query.slice(1) : query return trimmed .split('&') .reduce((params, param) => { const [key, value] = param.split('=') params[key] = value ? decodeURIComponent(value.replace(/\+/g, ' ')) : '' return params }, {} as Record<string, string>) } /** * Checks if the current window location URL contains an 'echoReply' parameter * which indicates that this page was only opened to signal back to the originating * tab that the protocol handler is installed. * If found, then localStorage events are used to notify the other tab, * and this page is redirected back to the Blockstack authenticator URL. * This function caches its result and will not trigger multiple redirects when * invoked multiple times. * @returns True if detected and the page will be automatically redirected. * @hidden */ export function protocolEchoReplyDetection(): boolean { // Check that the `window` APIs exist let globalScope: Window Iif (typeof self !== 'undefined') { globalScope = self } else Iif (typeof window !== 'undefined') { globalScope = window } else { // Exit detection function - we are not running in a browser environment. return false } if (!globalScope.location || !globalScope.localStorage) { // Exit detection function - we are not running in a browser environment. return false } // Avoid performing the check twice and triggered multiple redirect timers. const existingDetection = (globalScope as any)[GLOBAL_DETECTION_CACHE_KEY] if (typeof existingDetection === 'boolean') { return existingDetection } const searchParams = getQueryStringParams(globalScope.location.search) const echoReplyParam = searchParams[ECHO_REPLY_PARAM] if (echoReplyParam) { (globalScope as any)[GLOBAL_DETECTION_CACHE_KEY] = true // Use localStorage to notify originated tab that protocol handler is available and working. const echoReplyKey = `echo-reply-${echoReplyParam}` // Set the echo-reply result in localStorage for the other window to see. globalScope.localStorage.setItem(echoReplyKey, 'success') // Redirect back to the localhost auth url, as opposed to another protocol launch. // This will re-use the same tab rather than creating another useless one. globalScope.setTimeout(() => { const authContinuationParam = searchParams[AUTH_CONTINUATION_PARAM] globalScope.location.href = authContinuationParam }, 10) return true } return false } |