diff --git a/server/src/responders/website-responders.js b/server/src/responders/website-responders.js
index 7b054f0d4..33a5fda21 100644
--- a/server/src/responders/website-responders.js
+++ b/server/src/responders/website-responders.js
@@ -1,339 +1,344 @@
 // @flow
 
 import html from 'common-tags/lib/html';
 import type { $Response, $Request } from 'express';
 import fs from 'fs';
 import _keyBy from 'lodash/fp/keyBy';
 import * as React from 'react';
 import ReactDOMServer from 'react-dom/server';
 import { Provider } from 'react-redux';
 import { Route, StaticRouter } from 'react-router';
 import { createStore, type Store } from 'redux';
 import { promisify } from 'util';
 
 import { daysToEntriesFromEntryInfos } from 'lib/reducers/entry-reducer';
 import { freshMessageStore } from 'lib/reducers/message-reducer';
 import { mostRecentlyReadThread } from 'lib/selectors/thread-selectors';
 import { mostRecentMessageTimestamp } from 'lib/shared/message-utils';
 import { threadHasPermission } from 'lib/shared/thread-utils';
 import { defaultWebEnabledApps } from 'lib/types/enabled-apps';
 import { defaultCalendarFilters } from 'lib/types/filter-types';
 import { defaultNumberPerThread } from 'lib/types/message-types';
 import { defaultEnabledReports } from 'lib/types/report-types';
 import { defaultConnectionInfo } from 'lib/types/socket-types';
 import { threadPermissions } from 'lib/types/thread-types';
 import type { CurrentUserInfo } from 'lib/types/user-types';
 import { currentDateInTimeZone } from 'lib/utils/date-utils';
 import { ServerError } from 'lib/utils/errors';
 import { promiseAll } from 'lib/utils/promises';
 import { reducer } from 'web/redux/redux-setup';
 import type { AppState, Action } from 'web/redux/redux-setup';
 import getTitle from 'web/title/getTitle';
 import { navInfoFromURL } from 'web/url-utils';
 
 import { fetchEntryInfos } from '../fetchers/entry-fetchers';
 import { fetchMessageInfos } from '../fetchers/message-fetchers';
 import { fetchThreadInfos } from '../fetchers/thread-fetchers';
 import {
   fetchCurrentUserInfo,
   fetchKnownUserInfos,
 } from '../fetchers/user-fetchers';
 import { setNewSession } from '../session/cookies';
 import { Viewer } from '../session/viewer';
 import { streamJSON, waitForStream } from '../utils/json-stream';
-import { getAppURLFactsFromRequestURL } from '../utils/urls';
+import {
+  getAppURLFactsFromRequestURL,
+  clientURLFromLocalURL,
+} from '../utils/urls';
 
 const { renderToNodeStream } = ReactDOMServer;
 
 const access = promisify(fs.access);
 const googleFontsURL =
   'https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=Inter:wght@400;500;600&display=swap';
 const localFontsURL = 'fonts/local-fonts.css';
 async function getFontsURL() {
   try {
     await access(localFontsURL);
     return localFontsURL;
   } catch {
     return googleFontsURL;
   }
 }
 
 type AssetInfo = { jsURL: string, fontsURL: string, cssInclude: string };
 let assetInfo: ?AssetInfo = null;
 async function getAssetInfo() {
   if (assetInfo) {
     return assetInfo;
   }
   if (process.env.NODE_ENV === 'development') {
     const fontsURL = await getFontsURL();
     assetInfo = {
       jsURL: 'http://localhost:8080/dev.build.js',
       fontsURL,
       cssInclude: '',
     };
     return assetInfo;
   }
   // $FlowFixMe web/dist doesn't always exist
   const { default: assets } = await import('web/dist/assets');
   assetInfo = {
     jsURL: `compiled/${assets.browser.js}`,
     fontsURL: googleFontsURL,
     cssInclude: html`
       <link
         rel="stylesheet"
         type="text/css"
         href="compiled/${assets.browser.css}"
       />
     `,
   };
   return assetInfo;
 }
 
 let webpackCompiledRootComponent: ?React.ComponentType<{}> = null;
 async function getWebpackCompiledRootComponentForSSR() {
   if (webpackCompiledRootComponent) {
     return webpackCompiledRootComponent;
   }
   try {
     // $FlowFixMe web/dist doesn't always exist
     const webpackBuild = await import('web/dist/app.build.cjs');
     webpackCompiledRootComponent = webpackBuild.default.default;
     return webpackCompiledRootComponent;
   } catch {
     throw new Error(
       'Could not load app.build.cjs. ' +
         'Did you forget to run `yarn dev` in the web folder?',
     );
   }
 }
 
 async function websiteResponder(
   viewer: Viewer,
   req: $Request,
   res: $Response,
 ): Promise<void> {
-  const { basePath, baseDomain } = getAppURLFactsFromRequestURL(req.url);
+  const appURLFacts = getAppURLFactsFromRequestURL(req.url);
+  const { basePath, baseDomain } = appURLFacts;
   const baseURL = basePath.replace(/\/$/, '');
   const baseHref = baseDomain + baseURL;
 
   const appPromise = getWebpackCompiledRootComponentForSSR();
 
   let initialNavInfo;
   try {
     initialNavInfo = navInfoFromURL(req.url, {
       now: currentDateInTimeZone(viewer.timeZone),
     });
   } catch (e) {
     throw new ServerError(e.message);
   }
 
   const calendarQuery = {
     startDate: initialNavInfo.startDate,
     endDate: initialNavInfo.endDate,
     filters: defaultCalendarFilters,
   };
   const messageSelectionCriteria = { joinedThreads: true };
   const initialTime = Date.now();
 
   const assetInfoPromise = getAssetInfo();
   const threadInfoPromise = fetchThreadInfos(viewer);
   const messageInfoPromise = fetchMessageInfos(
     viewer,
     messageSelectionCriteria,
     defaultNumberPerThread,
   );
   const entryInfoPromise = fetchEntryInfos(viewer, [calendarQuery]);
   const currentUserInfoPromise = fetchCurrentUserInfo(viewer);
   const userInfoPromise = fetchKnownUserInfos(viewer);
 
   const sessionIDPromise = (async () => {
     if (viewer.loggedIn) {
       await setNewSession(viewer, calendarQuery, initialTime);
     }
     return viewer.sessionID;
   })();
 
   const threadStorePromise = (async () => {
     const { threadInfos } = await threadInfoPromise;
     return { threadInfos };
   })();
   const messageStorePromise = (async () => {
     const [
       { threadInfos },
       { rawMessageInfos, truncationStatuses },
     ] = await Promise.all([threadInfoPromise, messageInfoPromise]);
     const { messageStore: freshStore } = freshMessageStore(
       rawMessageInfos,
       truncationStatuses,
       mostRecentMessageTimestamp(rawMessageInfos, initialTime),
       threadInfos,
     );
     return freshStore;
   })();
   const entryStorePromise = (async () => {
     const { rawEntryInfos } = await entryInfoPromise;
     return {
       entryInfos: _keyBy('id')(rawEntryInfos),
       daysToEntries: daysToEntriesFromEntryInfos(rawEntryInfos),
       lastUserInteractionCalendar: initialTime,
     };
   })();
   const userStorePromise = (async () => {
     const userInfos = await userInfoPromise;
     return { userInfos, inconsistencyReports: [] };
   })();
 
   const navInfoPromise = (async () => {
     const [{ threadInfos }, messageStore] = await Promise.all([
       threadInfoPromise,
       messageStorePromise,
     ]);
     const finalNavInfo = initialNavInfo;
 
     const requestedActiveChatThreadID = finalNavInfo.activeChatThreadID;
     if (
       requestedActiveChatThreadID &&
       !threadHasPermission(
         threadInfos[requestedActiveChatThreadID],
         threadPermissions.VISIBLE,
       )
     ) {
       finalNavInfo.activeChatThreadID = null;
     }
 
     if (!finalNavInfo.activeChatThreadID) {
       const mostRecentThread = mostRecentlyReadThread(
         messageStore,
         threadInfos,
       );
       if (mostRecentThread) {
         finalNavInfo.activeChatThreadID = mostRecentThread;
       }
     }
 
     return finalNavInfo;
   })();
 
   const { jsURL, fontsURL, cssInclude } = await assetInfoPromise;
 
   // prettier-ignore
   res.write(html`
     <!DOCTYPE html>
     <html lang="en">
       <head>
         <meta charset="utf-8" />
         <title>${getTitle(0)}</title>
         <base href="${basePath}" />
         <link rel="stylesheet" type="text/css" href="${fontsURL}" />
         ${cssInclude}
         <link
           rel="apple-touch-icon"
           sizes="180x180"
           href="apple-touch-icon.png"
         />
         <link
           rel="icon"
           type="image/png"
           sizes="32x32"
           href="favicon-32x32.png"
         />
         <link
           rel="icon"
           type="image/png"
           sizes="16x16"
           href="favicon-16x16.png"
         />
         <link rel="manifest" href="site.webmanifest" />
         <link rel="mask-icon" href="safari-pinned-tab.svg" color="#b91d47" />
         <meta name="apple-mobile-web-app-title" content="Comm" />
         <meta name="application-name" content="Comm" />
         <meta name="msapplication-TileColor" content="#b91d47" />
         <meta name="theme-color" content="#b91d47" />
       </head>
       <body>
         <div id="react-root">
   `);
 
   const statePromises = {
     navInfo: navInfoPromise,
     currentUserInfo: ((currentUserInfoPromise: any): Promise<CurrentUserInfo>),
     sessionID: sessionIDPromise,
     entryStore: entryStorePromise,
     threadStore: threadStorePromise,
     userStore: userStorePromise,
     messageStore: messageStorePromise,
     updatesCurrentAsOf: initialTime,
     loadingStatuses: {},
     calendarFilters: defaultCalendarFilters,
     // We can use paths local to the <base href> on web
     urlPrefix: '',
     windowDimensions: { width: 0, height: 0 },
     baseHref,
     connection: {
       ...defaultConnectionInfo('web', viewer.timeZone),
       actualizedCalendarQuery: calendarQuery,
     },
     watchedThreadIDs: [],
     lifecycleState: 'active',
     enabledApps: defaultWebEnabledApps,
     reportStore: {
       enabledReports: defaultEnabledReports,
       queuedReports: [],
     },
     nextLocalID: 0,
     timeZone: viewer.timeZone,
     userAgent: viewer.userAgent,
     cookie: undefined,
     deviceToken: undefined,
     dataLoaded: viewer.loggedIn,
     windowActive: true,
   };
 
   const [stateResult, App] = await Promise.all([
     promiseAll(statePromises),
     appPromise,
   ]);
   const state: AppState = { ...stateResult };
   const store: Store<AppState, Action> = createStore(reducer, state);
 
   const routerContext = {};
+  const clientURL = clientURLFromLocalURL(req.url, appURLFacts);
   const reactStream = renderToNodeStream(
     <Provider store={store}>
       <StaticRouter
-        location={req.url}
+        location={clientURL}
         basename={baseURL}
         context={routerContext}
       >
         <Route path="*" component={App} />
       </StaticRouter>
     </Provider>,
   );
   if (routerContext.url) {
     throw new ServerError('URL modified during server render!');
   }
   reactStream.pipe(res, { end: false });
   await waitForStream(reactStream);
   res.write(html`
     </div>
     <script>
       var preloadedState =
   `);
 
   const filteredStatePromises = {
     ...statePromises,
     timeZone: null,
     userAgent: null,
   };
   const jsonStream = streamJSON(res, filteredStatePromises);
   await waitForStream(jsonStream);
   res.end(html`
     ;
           var baseURL = "${baseURL}";
         </script>
         <script src="${jsURL}"></script>
       </body>
     </html>
   `);
 }
 
 export { websiteResponder };