import {getPageTitleSuffix, GristLoadConfig, HideableUiElements, IHideableUiElement} from 'app/common/gristUrls'; import {getTagManagerSnippet} from 'app/common/tagManager'; import {Document} from 'app/common/UserAPI'; import {isAnonymousUser, RequestWithLogin} from 'app/server/lib/Authorizer'; import {RequestWithOrg} from 'app/server/lib/extractOrg'; import {GristServer} from 'app/server/lib/GristServer'; import {getSupportedEngineChoices} from 'app/server/lib/serverUtils'; import {readLoadedLngs, readLoadedNamespaces} from 'app/server/localization'; import * as express from 'express'; import * as fse from 'fs-extra'; import jsesc from 'jsesc'; import * as handlebars from 'handlebars'; import * as path from 'path'; const translate = (req: express.Request, key: string, args?: any) => req.t(`sendAppPage.${key}`, args); export interface ISendAppPageOptions { path: string; // Ignored if .content is present (set to "" for clarity). content?: string; status: number; config: Partial; tag?: string; // If present, override version tag. // If present, enable Google Tag Manager on this page (if GOOGLE_TAG_MANAGER_ID env var is set). // Used on the welcome page to track sign-ups. We don't intend to use it for in-app analytics. // Set to true to insert tracker unconditionally; false to omit it; "anon" to insert // it only when the user is not logged in. googleTagManager?: true | false | 'anon'; } export function makeGristConfig(homeUrl: string|null, extra: Partial, baseDomain?: string, req?: express.Request ): GristLoadConfig { // .invalid is a TLD the IETF promises will never exist. const pluginUrl = process.env.APP_UNTRUSTED_URL || 'http://plugins.invalid'; const pathOnly = (process.env.GRIST_ORG_IN_PATH === "true") || (homeUrl && new URL(homeUrl).hostname === 'localhost') || false; const mreq = req as RequestWithOrg|undefined; return { homeUrl, org: process.env.GRIST_SINGLE_ORG || (mreq && mreq.org), baseDomain, singleOrg: process.env.GRIST_SINGLE_ORG, pathOnly, supportAnon: shouldSupportAnon(), supportEngines: getSupportedEngineChoices(), hideUiElements: getHiddenUiElements(), pageTitleSuffix: configuredPageTitleSuffix(), pluginUrl, stripeAPIKey: process.env.STRIPE_PUBLIC_API_KEY, googleClientId: process.env.GOOGLE_CLIENT_ID, googleDriveScope: process.env.GOOGLE_DRIVE_SCOPE, helpScoutBeaconId: process.env.HELP_SCOUT_BEACON_ID_V2, maxUploadSizeImport: (Number(process.env.GRIST_MAX_UPLOAD_IMPORT_MB) * 1024 * 1024) || undefined, maxUploadSizeAttachment: (Number(process.env.GRIST_MAX_UPLOAD_ATTACHMENT_MB) * 1024 * 1024) || undefined, timestampMs: Date.now(), enableWidgetRepository: Boolean(process.env.GRIST_WIDGET_LIST_URL), survey: Boolean(process.env.DOC_ID_NEW_USER_INFO), tagManagerId: process.env.GOOGLE_TAG_MANAGER_ID, activation: getActivation(req as RequestWithLogin | undefined), enableCustomCss: process.env.APP_STATIC_INCLUDE_CUSTOM_CSS === 'true', supportedLngs: readLoadedLngs(req?.i18n), namespaces: readLoadedNamespaces(req?.i18n), featureComments: process.env.COMMENTS === "true", ...extra, }; } /** * Creates a method that will send html page that will immediately post a message to a parent window. * Primary used for Google Auth Grist's endpoint, but can be used in future in any other server side * authentication flow. */ export function makeMessagePage(staticDir: string) { return async (req: express.Request, resp: express.Response, message: any) => { const fileContent = await fse.readFile(path.join(staticDir, "message.html"), 'utf8'); const content = fileContent.replace( "", `` ); resp.status(200).type('html').send(content); }; } /** * Send a simple template page, read from file at pagePath (relative to static/), with certain * placeholders replaced. */ export function makeSendAppPage(opts: { server: GristServer|null, staticDir: string, tag: string, testLogin?: boolean, baseDomain?: string }) { const {server, staticDir, tag, testLogin} = opts; return async (req: express.Request, resp: express.Response, options: ISendAppPageOptions) => { // .invalid is a TLD the IETF promises will never exist. const config = makeGristConfig(server ? server.getHomeUrl(req) : null, options.config, opts.baseDomain, req); // We could cache file contents in memory, but the filesystem does caching too, and compared // to that, the performance gain is unlikely to be meaningful. So keep it simple here. const fileContent = options.content || await fse.readFile(path.join(staticDir, options.path), 'utf8'); const needTagManager = (options.googleTagManager === 'anon' && isAnonymousUser(req)) || options.googleTagManager === true; const tagManagerSnippet = needTagManager ? getTagManagerSnippet(process.env.GOOGLE_TAG_MANAGER_ID) : ''; const staticOrigin = process.env.APP_STATIC_URL || ""; const staticBaseUrl = `${staticOrigin}/v/${options.tag || tag}/`; const customHeadHtmlSnippet = server?.create.getExtraHeadHtml?.() ?? ""; const warning = testLogin ? "
Authentication is not enforced
" : ""; // Preload all languages that will be used or are requested by client. const preloads = req.languages.map((lng) => readLoadedNamespaces(req.i18n).map((ns) => `` ).join("\n") ).join('\n'); const content = fileContent .replace("", warning) .replace("", getPageTitle(req, config)) .replace("", getPageMetadataHtmlSnippet(config)) .replace("", getPageTitleSuffix(server?.getGristConfig())) .replace("", `` + tagManagerSnippet) .replace("", preloads) .replace("", customHeadHtmlSnippet) .replace( "", `` ); resp.status(options.status).type('html').send(content); }; } function shouldSupportAnon() { // Enable UI for anonymous access if a flag is explicitly set in the environment return process.env.GRIST_SUPPORT_ANON === "true"; } function getHiddenUiElements(): IHideableUiElement[] { const str = process.env.GRIST_HIDE_UI_ELEMENTS; if (!str) { return []; } return HideableUiElements.checkAll(str.split(",")); } function configuredPageTitleSuffix() { const result = process.env.GRIST_PAGE_TITLE_SUFFIX; return result === "_blank" ? "" : result; } /** * Returns a page title suitable for inserting into an HTML title element. * * Currently returns the document name if the page being requested is for a document, or * a placeholder, "Loading...", that's updated in the client once the page has loaded. * * Note: The string returned is escaped and safe to insert into HTML. */ function getPageTitle(req: express.Request, config: GristLoadConfig): string { const maybeDoc = getDocFromConfig(config); if (!maybeDoc) { return translate(req, 'Loading') + "..."; } return handlebars.Utils.escapeExpression(maybeDoc.name); } /** * Returns a string representation of 0 or more HTML metadata elements. * * Currently includes the document description and thumbnail if the requested page is * for a document and the document has one set. * * Note: The string returned is escaped and safe to insert into HTML. */ function getPageMetadataHtmlSnippet(config: GristLoadConfig): string { const metadataElements: string[] = []; const maybeDoc = getDocFromConfig(config); const description = maybeDoc?.options?.description; if (description) { const content = handlebars.Utils.escapeExpression(description); metadataElements.push(``); metadataElements.push(``); metadataElements.push(``); } const icon = maybeDoc?.options?.icon; if (icon) { const content = handlebars.Utils.escapeExpression(icon); metadataElements.push(``); metadataElements.push(``); metadataElements.push(``); } return metadataElements.join('\n'); } function getDocFromConfig(config: GristLoadConfig): Document | null { if (!config.getDoc || !config.assignmentId) { return null; } return config.getDoc[config.assignmentId] ?? null; } function getActivation(mreq: RequestWithLogin|undefined) { const defaultEmail = process.env.GRIST_DEFAULT_EMAIL; return { ...mreq?.activation, isManager: Boolean(defaultEmail && defaultEmail === mreq?.user?.loginEmail), }; }