root
108 lines
3.0 KiB
JavaScript
108 lines
3.0 KiB
JavaScript
function normalizeAssetPrefix(rawValue, basePath) {
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if (!rawValue) return undefined
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try {
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const url = new URL(rawValue)
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const pathname = url.pathname.replace(/\/$/, '')
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if (!pathname.endsWith(basePath)) {
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url.pathname = `${pathname}${basePath}`
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}
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return url.toString().replace(/\/$/, '')
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} catch {
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const trimmed = rawValue.replace(/\/$/, '')
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return trimmed.endsWith(basePath) ? trimmed : `${trimmed}${basePath}`
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}
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}
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function collectOrigins(assetSources) {
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const origins = new Set()
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for (const source of assetSources) {
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if (!source) continue
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try {
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origins.add(new URL(source).origin)
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} catch {
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continue
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}
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}
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return [...origins]
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}
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function collectWebSocketOrigins(assetSources) {
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const origins = new Set()
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for (const source of assetSources) {
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if (!source) continue
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try {
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const url = new URL(source)
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const protocol = url.protocol === 'https:' ? 'wss:' : 'ws:'
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origins.add(`${protocol}//${url.host}`)
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} catch {
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continue
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}
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}
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return [...origins]
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}
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function collectBrowserApiSources() {
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const sources = [process.env.NEXT_PUBLIC_API_URL, process.env.API_URL]
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if (process.env.NODE_ENV !== 'production') {
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sources.push('http://localhost:4000/api/v1')
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}
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return sources
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}
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function buildSecurityHeaders({ assetSources = [], connectSources = collectBrowserApiSources() } = {}) {
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const assetOrigins = collectOrigins(assetSources)
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const connectOrigins = collectOrigins(connectSources)
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const websocketOrigins = [
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...collectWebSocketOrigins(assetSources),
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...collectWebSocketOrigins(connectSources),
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]
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const scriptSrc = ["'self'", "'unsafe-inline'"]
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if (process.env.NODE_ENV !== 'production') {
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scriptSrc.push("'unsafe-eval'")
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}
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scriptSrc.push(...assetOrigins)
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const styleSrc = ["'self'", "'unsafe-inline'", ...assetOrigins]
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const imgSrc = ["'self'", 'data:', 'blob:', 'https:', ...assetOrigins]
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const fontSrc = ["'self'", 'data:', ...assetOrigins]
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const connectSrc = [...new Set(["'self'", 'https:', 'wss:', ...assetOrigins, ...connectOrigins, ...websocketOrigins])]
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return [
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{ key: 'Strict-Transport-Security', value: 'max-age=31536000; includeSubDomains' },
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{ key: 'X-Content-Type-Options', value: 'nosniff' },
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{ key: 'X-Frame-Options', value: 'DENY' },
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{ key: 'Referrer-Policy', value: 'strict-origin-when-cross-origin' },
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{ key: 'Permissions-Policy', value: 'camera=(), microphone=(), geolocation=()' },
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{
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key: 'Content-Security-Policy',
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value: [
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"default-src 'self'",
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`script-src ${scriptSrc.join(' ')}`,
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`style-src ${styleSrc.join(' ')}`,
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`img-src ${imgSrc.join(' ')}`,
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`font-src ${fontSrc.join(' ')}`,
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`connect-src ${connectSrc.join(' ')}`,
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"frame-ancestors 'none'",
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"base-uri 'self'",
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"form-action 'self'",
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"object-src 'none'",
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].join('; '),
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},
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]
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}
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module.exports = {
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buildSecurityHeaders,
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normalizeAssetPrefix,
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}
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