76 lines
3.0 KiB
JavaScript
76 lines
3.0 KiB
JavaScript
import { checkIsOnDemandRevalidate } from "../.";
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import { clearPreviewData, COOKIE_NAME_PRERENDER_BYPASS, COOKIE_NAME_PRERENDER_DATA, SYMBOL_PREVIEW_DATA } from "../index";
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import { RequestCookies } from "../../web/spec-extension/cookies";
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import { HeadersAdapter } from "../../web/spec-extension/adapters/headers";
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export function tryGetPreviewData(req, res, options, multiZoneDraftMode) {
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var _cookies_get, _cookies_get1;
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// if an On-Demand revalidation is being done preview mode
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// is disabled
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if (options && checkIsOnDemandRevalidate(req, options).isOnDemandRevalidate) {
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return false;
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}
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// Read cached preview data if present
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// TODO: use request metadata instead of a symbol
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if (SYMBOL_PREVIEW_DATA in req) {
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return req[SYMBOL_PREVIEW_DATA];
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}
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const headers = HeadersAdapter.from(req.headers);
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const cookies = new RequestCookies(headers);
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const previewModeId = (_cookies_get = cookies.get(COOKIE_NAME_PRERENDER_BYPASS)) == null ? void 0 : _cookies_get.value;
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const tokenPreviewData = (_cookies_get1 = cookies.get(COOKIE_NAME_PRERENDER_DATA)) == null ? void 0 : _cookies_get1.value;
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// Case: preview mode cookie set but data cookie is not set
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if (previewModeId && !tokenPreviewData && previewModeId === options.previewModeId) {
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// This is "Draft Mode" which doesn't use
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// previewData, so we return an empty object
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// for backwards compat with "Preview Mode".
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const data = {};
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Object.defineProperty(req, SYMBOL_PREVIEW_DATA, {
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value: data,
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enumerable: false
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});
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return data;
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}
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// Case: neither cookie is set.
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if (!previewModeId && !tokenPreviewData) {
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return false;
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}
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// Case: one cookie is set, but not the other.
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if (!previewModeId || !tokenPreviewData) {
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if (!multiZoneDraftMode) {
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clearPreviewData(res);
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}
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return false;
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}
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// Case: preview session is for an old build.
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if (previewModeId !== options.previewModeId) {
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if (!multiZoneDraftMode) {
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clearPreviewData(res);
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}
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return false;
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}
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let encryptedPreviewData;
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try {
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const jsonwebtoken = require("next/dist/compiled/jsonwebtoken");
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encryptedPreviewData = jsonwebtoken.verify(tokenPreviewData, options.previewModeSigningKey);
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} catch {
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// TODO: warn
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clearPreviewData(res);
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return false;
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}
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const { decryptWithSecret } = require("../../crypto-utils");
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const decryptedPreviewData = decryptWithSecret(Buffer.from(options.previewModeEncryptionKey), encryptedPreviewData.data);
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try {
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// TODO: strict runtime type checking
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const data = JSON.parse(decryptedPreviewData);
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// Cache lookup
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Object.defineProperty(req, SYMBOL_PREVIEW_DATA, {
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value: data,
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enumerable: false
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});
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return data;
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} catch {
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return false;
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}
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}
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//# sourceMappingURL=try-get-preview-data.js.map
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