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fix: add text/plain Accept header / Axios detection + Sentry structured logging #15068

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Merged
merged 2 commits into from
Sep 29, 2025
Merged

fix: add text/plain Accept header / Axios detection + Sentry structured logging #15068

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42d4878
feat: add text/plain Accept header detection and Sentry structured lo…
codyde Sep 29, 2025
bff867e
fix: remove unused variables and fix import sorting
codyde Sep 29, 2025
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25 changes: 16 additions & 9 deletions src/middleware.ts
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import * as Sentry from '@sentry/nextjs';
import type {NextRequest} from 'next/server';
import {NextResponse} from 'next/server';

Expand Down Expand Up @@ -59,7 +60,9 @@ function isAIOrDevTool(userAgent: string): boolean {
*/
function wantsMarkdownViaAccept(acceptHeader: string): boolean {
return (
acceptHeader.includes('text/markdown') || acceptHeader.includes('text/x-markdown')
acceptHeader.includes('text/markdown') ||
acceptHeader.includes('text/x-markdown') ||
acceptHeader.includes('text/plain')
);
}

Expand Down Expand Up @@ -106,11 +109,13 @@ const handleAIClientRedirect = (request: NextRequest) => {
!url.pathname.includes('.') &&
!url.pathname.startsWith('/api/')
) {
const contentType = willServeMarkdown ? '📄 MARKDOWN' : '🌐 HTML';
const methodInfo = willServeMarkdown ? ` (${detectionMethod})` : '';
console.log(
`[Middleware] ${url.pathname} - ${contentType}${methodInfo} - User-Agent: ${userAgent}`
);
Sentry.logger.info(`Middleware request processed: ${url.pathname}`, {
urlPath: url.pathname,
acceptHeader: request.headers.get('accept') || '',
userAgent: request.headers.get('user-agent') || '',
contentType: willServeMarkdown ? 'markdown' : 'html',
detectionMethod: willServeMarkdown ? detectionMethod : null,
});
}

// Skip if already requesting a markdown file
Expand All @@ -132,9 +137,11 @@ const handleAIClientRedirect = (request: NextRequest) => {
// Check for markdown request (Accept header, user-agent, or manual)
if (clientWantsMarkdown || forceMarkdown) {
// Log the redirect for debugging
console.log(
`[Middleware] Redirecting to markdown: ${forceMarkdown ? 'Manual format=md' : detectionMethod}`
);
Sentry.logger.info('Markdown redirect triggered', {
urlPath: url.pathname,
detectionMethod: forceMarkdown ? 'Manual format=md' : detectionMethod,
targetUrl: url.pathname.replace(/\/+$/, '') + '.md',
});
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@cursor cursor bot Sep 29, 2025

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Bug: Markdown Redirect Logs Incorrect for Root Path

The targetUrl logged for markdown redirects is inaccurate for the root path (/). The log calculates '.md', but the actual redirect goes to /index.md, which makes the logs misleading for debugging.

Fix in Cursor Fix in Web


// Create new URL with .md extension
const newUrl = url.clone();
Expand Down
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