Add reviews and support tutorial management

src/app/api/eversolo-paste-url/route.ts

@@ -0,0 +1,95 @@
+import { NextRequest } from 'next/server'
+
+import { eversoloPasteURLAllowList } from '@/payload/upload-paste-url-allow-list'
+
+export const runtime = 'nodejs'
+
+const retryDelays = [0, 300, 800, 1500]
+const fetchTimeoutMs = 10000
+
+function isAllowedPasteURL(value: string) {
+  try {
+    const url = new URL(value)
+
+    return eversoloPasteURLAllowList.some((allowItem) => {
+      return url.protocol === `${allowItem.protocol}:` && url.hostname === allowItem.hostname
+    })
+  } catch {
+    return false
+  }
+}
+
+function wait(delay: number) {
+  return new Promise((resolve) => {
+    setTimeout(resolve, delay)
+  })
+}
+
+async function fetchWithRetry(src: string) {
+  let lastError: unknown
+
+  for (const [index, delay] of retryDelays.entries()) {
+    if (delay > 0) {
+      await wait(delay)
+    }
+
+    const controller = new AbortController()
+    const timeout = setTimeout(() => {
+      controller.abort()
+    }, fetchTimeoutMs)
+
+    try {
+      const response = await fetch(src, {
+        cache: 'no-store',
+        headers: {
+          'user-agent':
+            'Mozilla/5.0 (compatible; EversoloWebPasteImporter/1.0; +https://www.eversolo.com)',
+        },
+        redirect: 'follow',
+        signal: controller.signal,
+      })
+
+      if (response.ok || response.status < 500 || index === retryDelays.length - 1) {
+        return response
+      }
+    } catch (error) {
+      lastError = error
+    } finally {
+      clearTimeout(timeout)
+    }
+  }
+
+  throw lastError
+}
+
+export async function GET(request: NextRequest) {
+  const src = request.nextUrl.searchParams.get('src')
+
+  if (!src || !isAllowedPasteURL(src)) {
+    return new Response('URL is not allowed.', { status: 400 })
+  }
+
+  let upstream: Response
+
+  try {
+    upstream = await fetchWithRetry(src)
+  } catch {
+    return new Response('Failed to fetch the file.', { status: 502 })
+  }
+
+  if (!upstream.ok) {
+    return new Response('Failed to fetch the file.', { status: upstream.status })
+  }
+
+  const headers = new Headers()
+  const contentType = upstream.headers.get('content-type')
+  const contentLength = upstream.headers.get('content-length')
+
+  if (contentType) headers.set('content-type', contentType)
+  if (contentLength) headers.set('content-length', contentLength)
+
+  return new Response(await upstream.arrayBuffer(), {
+    headers,
+    status: 200,
+  })
+}