next
Version:
The React Framework
86 lines (85 loc) • 3.24 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
Object.defineProperty(exports, "tryGetPreviewData", {
enumerable: true,
get: function() {
return tryGetPreviewData;
}
});
const _ = require("../.");
const _index = require("../index");
const _cookies = require("../../web/spec-extension/cookies");
const _headers = require("../../web/spec-extension/adapters/headers");
function tryGetPreviewData(req, res, options, multiZoneDraftMode) {
var _cookies_get, _cookies_get1;
// if an On-Demand revalidation is being done preview mode
// is disabled
if (options && (0, _.checkIsOnDemandRevalidate)(req, options).isOnDemandRevalidate) {
return false;
}
// Read cached preview data if present
// TODO: use request metadata instead of a symbol
if (_index.SYMBOL_PREVIEW_DATA in req) {
return req[_index.SYMBOL_PREVIEW_DATA];
}
const headers = _headers.HeadersAdapter.from(req.headers);
const cookies = new _cookies.RequestCookies(headers);
const previewModeId = (_cookies_get = cookies.get(_index.COOKIE_NAME_PRERENDER_BYPASS)) == null ? void 0 : _cookies_get.value;
const tokenPreviewData = (_cookies_get1 = cookies.get(_index.COOKIE_NAME_PRERENDER_DATA)) == null ? void 0 : _cookies_get1.value;
// Case: preview mode cookie set but data cookie is not set
if (previewModeId && !tokenPreviewData && previewModeId === options.previewModeId) {
// This is "Draft Mode" which doesn't use
// previewData, so we return an empty object
// for backwards compat with "Preview Mode".
const data = {};
Object.defineProperty(req, _index.SYMBOL_PREVIEW_DATA, {
value: data,
enumerable: false
});
return data;
}
// Case: neither cookie is set.
if (!previewModeId && !tokenPreviewData) {
return false;
}
// Case: one cookie is set, but not the other.
if (!previewModeId || !tokenPreviewData) {
if (!multiZoneDraftMode) {
(0, _index.clearPreviewData)(res);
}
return false;
}
// Case: preview session is for an old build.
if (previewModeId !== options.previewModeId) {
if (!multiZoneDraftMode) {
(0, _index.clearPreviewData)(res);
}
return false;
}
let encryptedPreviewData;
try {
const jsonwebtoken = require('next/dist/compiled/jsonwebtoken');
encryptedPreviewData = jsonwebtoken.verify(tokenPreviewData, options.previewModeSigningKey);
} catch {
// TODO: warn
(0, _index.clearPreviewData)(res);
return false;
}
const { decryptWithSecret } = require('../../crypto-utils');
const decryptedPreviewData = decryptWithSecret(Buffer.from(options.previewModeEncryptionKey), encryptedPreviewData.data);
try {
// TODO: strict runtime type checking
const data = JSON.parse(decryptedPreviewData);
// Cache lookup
Object.defineProperty(req, _index.SYMBOL_PREVIEW_DATA, {
value: data,
enumerable: false
});
return data;
} catch {
return false;
}
}
//# sourceMappingURL=try-get-preview-data.js.map