Finalize feed behavior

.vscode/settings.json

@@ -3,6 +3,7 @@
     "ABCDEFGHIJKLMNOP",
     "Acros",
     "affordance",
+    "apos",
     "ARROWLEFT",
     "ARROWRIGHT",
     "Astia",

app/feed.json/route.ts

@@ -6,7 +6,8 @@ import {
 } from '@/app/config';
 import { FEED_PHOTO_REQUEST_LIMIT, formatPhotoForFeedJson } from '@/app/feed';
 
-export const dynamic = 'force-static';
+// Cache for 24 hours
+export const revalidate = 86_400;
 
 export async function GET() {
   if (SITE_FEEDS_ENABLED) {

app/rss.xml/route.ts

@@ -8,7 +8,8 @@ import {
 import { createRssItems, FEED_PHOTO_REQUEST_LIMIT } from '@/app/feed';
 import { ABSOLUTE_PATH_FOR_RSS_XML } from '@/app/paths';
 
-export const dynamic = 'force-static';
+// Cache for 24 hours
+export const revalidate = 86_400;
 
 export async function GET() {
   if (SITE_FEEDS_ENABLED) {
@@ -19,18 +20,19 @@ export async function GET() {
 
     const items = createRssItems(photos);
 
-    return new Response(`
-      <?xml version="1.0" encoding="UTF-8"?>
-      <rss
-        version="2.0"
+    return new Response(`<?xml version="1.0" encoding="UTF-8"?>
+      <rss version="2.0"
         xmlns:content="http://purl.org/rss/1.0/modules/content/"
         xmlns:atom="http://www.w3.org/2005/Atom"
         xmlns:media="http://search.yahoo.com/mrss/"
       >
         <channel>
           <title>${META_TITLE}</title>
-          <atom:link href="${ABSOLUTE_PATH_FOR_RSS_XML}"
-            rel="self" type="application/rss+xml" />
+          <atom:link
+            href="${ABSOLUTE_PATH_FOR_RSS_XML}"
+            rel="self"
+            type="application/rss+xml"
+          />
           <link>${BASE_URL}</link>
           <description>${META_DESCRIPTION}</description>
           ${items.join('\n')}
@@ -40,6 +42,6 @@ export async function GET() {
     { headers: { 'Content-Type': 'text/xml' } },
     );
   } else {
-    return new Response('RSS feed access disabled', { status: 404 });
+    return new Response('Feed disabled', { status: 404 });
   }
 }

src/app/feed.ts

@@ -5,6 +5,7 @@ import {
   NextImageSize,
 } from '@/platforms/next-image';
 import { formatDate, formatDateFromPostgresString } from '@/utility/date';
+import { formatStringForXml } from '@/utility/string';
 
 export const FEED_PHOTO_REQUEST_LIMIT = 40;
 
@@ -12,44 +13,44 @@ export const FEED_PHOTO_WIDTH_SMALL = 200;
 export const FEED_PHOTO_WIDTH_MEDIUM = 640;
 export const FEED_PHOTO_WIDTH_LARGE = 1200;
 
-interface PublicFeedMedia {
+interface FeedMedia {
   url: string
   width: number
   height: number
 }
 
-interface PublicFeedPhotoJson {
+interface FeedPhotoJson {
   id: string
-  title?: string
+  title: string
   url: string
   make?: string
   model?: string
   tags?: string[]
   takenAtNaive: string
-  src: Record<'small' | 'medium' | 'large', PublicFeedMedia>
+  src: Record<'small' | 'medium' | 'large', FeedMedia>
 }
 
-interface PublicFeedPhotoRss {
+interface FeedPhotoRss {
   id: string
-  title?: string
+  title: string
   description?: string
   link: string
-  publicationDate: Date
-  media: Record<'content' | 'thumb', PublicFeedMedia>
+  pubDate: Date
+  media: Record<'content' | 'thumb', FeedMedia>
 }
 
-export interface PublicFeedJson {
+export interface FeedJson {
   meta: {
     title: string
     url: string
   }
-  photos: PublicFeedPhotoJson[]
+  photos: FeedPhotoJson[]
 }
 
 const generateFeedMedia = (
   photo: Photo,
   size: NextImageSize,
-): PublicFeedMedia => ({
+): FeedMedia => ({
   url: getNextImageUrlForRequest({ imageUrl: photo.url, size }),
   width: size,
   height: Math.round(size / photo.aspectRatio),
@@ -58,10 +59,10 @@ const generateFeedMedia = (
 const getCoreFeedFields = (photo: Photo) => ({
   id: photo.id,
   title: titleForPhoto(photo),
-  description: descriptionForPhoto(photo),
+  description: descriptionForPhoto(photo, true),
 });
 
-export const formatPhotoForFeedJson = (photo: Photo): PublicFeedPhotoJson => ({
+export const formatPhotoForFeedJson = (photo: Photo): FeedPhotoJson => ({
   ...getCoreFeedFields(photo),
   url: absolutePathForPhoto({ photo }),
   ...photo.make && { make: photo.make },
@@ -75,37 +76,35 @@ export const formatPhotoForFeedJson = (photo: Photo): PublicFeedPhotoJson => ({
   },
 });
 
-const formatPhotoForFeedRss = (photo: Photo): PublicFeedPhotoRss => ({
+const formatPhotoForFeedRss = (photo: Photo): FeedPhotoRss => ({
   ...getCoreFeedFields(photo),
   link: absolutePathForPhoto({ photo }),
-  publicationDate: photo.createdAt,
+  pubDate: photo.createdAt,
   media: {
     content: generateFeedMedia(photo, FEED_PHOTO_WIDTH_LARGE),
     thumb: generateFeedMedia(photo, FEED_PHOTO_WIDTH_MEDIUM),
   },
 });
 
-const feedPhotoToXml = (photo: PublicFeedPhotoRss): string => {
-  const formattedDate = formatDate({
-    date: photo.publicationDate,
-    length: 'rss',
-  });
+const feedPhotoToXml = (photo: FeedPhotoRss): string => {
+  const formattedDate = formatDate({ date: photo.pubDate, length: 'rss' });
   return `<item>
     <title>${photo.title}</title>
     <link>${photo.link}</link>
     <pubDate>${formattedDate}</pubDate>
     <guid isPermaLink="true">${photo.link}</guid>
-    <description>
-      <![CDATA[${photo.description}]]>
-    </description>
-    <media:content url="<![CDATA[${photo.media.content.url}]]>"
+    ${photo.description
+    ? `<description><![CDATA[${photo.description}]]></description>`
+    : ''}
+    <media:content
+      url="${formatStringForXml(photo.media.content.url)}"
       type="image/jpeg"
       medium="image"
       width="${photo.media.content.width}"
       height="${photo.media.content.height}"
     >
       <media:thumbnail
-        url="<![CDATA[${photo.media.thumb.url}]]>"
+        url="${formatStringForXml(photo.media.thumb.url)}"
         width="${photo.media.thumb.width}"
         height="${photo.media.thumb.height}"
       />

src/utility/string.ts

@@ -35,6 +35,14 @@ export const parameterize = (
     )
     .toLocaleLowerCase();
 
+export const formatStringForXml = (string: string) =>
+  string
+    .replace(/&/g, '&')
+    .replace(/'/g, ''')
+    .replace(/"/g, '"')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;');
+
 export const deparameterize = (string: string) =>
   capitalizeWords(string.replaceAll('-', ' '));