ai generated solutions to our ai generated problems

server.cjs

@@ -357,6 +357,25 @@ function sendPublicDataFile(req, res, filePath, status = 200, extraHeaders = {})
   })
 }
 
+function sendPublicDataHead(req, res, filePath, status = 200, extraHeaders = {}) {
+  fs.stat(filePath, (error, stat) => {
+    if (error || !stat.isFile()) {
+      send(res, 404, '', {
+        'content-type': 'application/json; charset=utf-8',
+        'cache-control': 'no-store',
+      })
+      return
+    }
+
+    send(res, status, '', {
+      'content-type': 'application/json; charset=utf-8',
+      'content-length': String(stat.size),
+      'cache-control': `public, max-age=${PUBLIC_DATA_CACHE_MAX_AGE_SECONDS}, stale-while-revalidate=${PUBLIC_DATA_STALE_REVALIDATE_SECONDS}`,
+      ...extraHeaders,
+    })
+  })
+}
+
 async function servePublicData(req, res, pathname) {
   const filePath = safePublicDataPath(pathname)
   const relativePath = publicDataRelativePath(pathname)
@@ -367,7 +386,8 @@ async function servePublicData(req, res, pathname) {
 
   const current = cachedPublicData(filePath)
   if (current?.fresh) {
-    sendPublicDataFile(req, res, filePath, 200, { 'x-tssbot-cache': 'data-hit' })
+    const sender = req.method === 'HEAD' ? sendPublicDataHead : sendPublicDataFile
+    sender(req, res, filePath, 200, { 'x-tssbot-cache': 'data-hit' })
     return
   }
 
@@ -379,7 +399,17 @@ async function servePublicData(req, res, pathname) {
 
   if (current) {
     refreshPublicData(filePath, new URL(apiPath, API_UPSTREAM))
-    sendPublicDataFile(req, res, filePath, 200, { 'x-tssbot-cache': 'data-stale' })
+    const sender = req.method === 'HEAD' ? sendPublicDataHead : sendPublicDataFile
+    sender(req, res, filePath, 200, { 'x-tssbot-cache': 'data-stale' })
+    return
+  }
+
+  if (req.method === 'HEAD') {
+    send(res, 404, '', {
+      'content-type': 'application/json; charset=utf-8',
+      'cache-control': 'no-store',
+      'x-tssbot-cache': 'data-miss',
+    })
     return
   }
 
@@ -2765,7 +2795,7 @@ const server = http.createServer((req, res) => {
     return
   }
 
-  if (req.method === 'GET') {
+  if (req.method === 'GET' || req.method === 'HEAD') {
     let pathname = ''
     try {
       pathname = new URL(req.url, `http://${req.headers.host || 'localhost'}`).pathname