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yusufipk
52ace1a1a8
Move Content-Security-Policy generation to proxy.ts so R2_PRESIGN_ENDPOINT is included at request time instead of being frozen at image build time. Document reverse-proxy layouts for Docker self-hosting and copy proxy.ts into the Docker image. Closes #17
97 lines
3.0 KiB
TypeScript
97 lines
3.0 KiB
TypeScript
function resolveBunnyCdnHostname(): string | null {
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const raw = process.env.BUNNY_CDN_URL || process.env.NEXT_PUBLIC_BUNNY_CDN_URL;
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if (!raw) return null;
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try {
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const parsed = new URL(raw);
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return parsed.hostname || null;
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} catch {
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return raw.replace(/^https?:\/\//, '').replace(/\/+$/, '') || null;
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}
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}
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function resolveR2ConnectOrigins(): string[] {
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const origins = new Set<string>();
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for (const raw of [
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process.env.R2_ENDPOINT?.trim(),
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process.env.R2_PRESIGN_ENDPOINT?.trim(),
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process.env.R2_PUBLIC_BASE_URL?.trim(),
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]) {
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if (!raw) continue;
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try {
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origins.add(new URL(raw).origin);
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} catch {
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// Ignore invalid custom endpoints in CSP generation.
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}
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}
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const accountId = process.env.R2_ACCOUNT_ID?.trim();
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const bucket = process.env.R2_BUCKET_NAME?.trim();
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if (accountId) {
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origins.add(`https://${accountId}.r2.cloudflarestorage.com`);
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if (bucket) {
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origins.add(`https://${bucket}.${accountId}.r2.cloudflarestorage.com`);
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}
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origins.add('https://*.r2.cloudflarestorage.com');
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}
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// Docker/MinIO self-hosted defaults for local development.
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origins.add('http://localhost:9000');
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origins.add('http://127.0.0.1:9000');
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return [...origins];
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}
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/**
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* Build Content-Security-Policy from runtime environment variables.
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* Called per request so Docker/self-hosted storage endpoints are available
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* without rebuilding the image.
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*/
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export function buildContentSecurityPolicy(): string {
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const isDev = process.env.NODE_ENV === 'development';
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const bunnyCdnHostname = resolveBunnyCdnHostname();
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const cdnOrigin = bunnyCdnHostname ? `https://${bunnyCdnHostname}` : '';
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const connectSrcParts = [
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"'self'",
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'https://video.bunnycdn.com',
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'https://www.youtube.com',
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cdnOrigin,
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...resolveR2ConnectOrigins(),
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// Allow Next.js HMR websocket in development
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...(isDev ? ['ws://localhost:* wss://localhost:*'] : []),
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].filter(Boolean);
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const imgSrcParts = [
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"'self'",
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'data:',
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'blob:',
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'https://img.youtube.com',
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'https://i.ytimg.com',
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'https://images.unsplash.com',
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'https://vz-thumbnail.b-cdn.net',
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cdnOrigin,
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].filter(Boolean);
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const mediaSrcParts = ["'self'", 'blob:', cdnOrigin].filter(Boolean);
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return [
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"default-src 'self'",
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// 'unsafe-inline' is required by Next.js App Router (hydration scripts, inline styles)
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// https://www.youtube.com is required for the dynamically-injected YouTube IFrame API script
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"script-src 'self' 'unsafe-inline' https://www.youtube.com",
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"style-src 'self' 'unsafe-inline'",
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`img-src ${imgSrcParts.join(' ')}`,
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`media-src ${mediaSrcParts.join(' ')}`,
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"frame-src 'self' https://www.youtube.com https://iframe.mediadelivery.net",
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`connect-src ${connectSrcParts.join(' ')}`,
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// next/font self-hosts Google Fonts at build time — no external font origin needed
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"font-src 'self'",
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"worker-src 'self' blob:",
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"object-src 'none'",
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"base-uri 'self'",
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"form-action 'self'",
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"frame-ancestors 'none'",
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].join('; ');
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}
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