Put CSP in to headers and not Meta tags

2025-04-14 15:00:14 +01:00
parent 6543161bad
commit 8f9652003e
4 changed files with 92 additions and 6 deletions
@@ -0,0 +1,77 @@
+import { NextResponse } from "next/server";
+
+export function middleware(request) {
+    const nonce = Buffer.from(crypto.randomUUID()).toString("base64");
+    const cspHeader = `
+    default-src 'self';
+    script-src 'self' 'nonce-${nonce}' 'strict-dynamic' https: http: ${
+        process.env.NODE_ENV === "production" ? "" : `'unsafe-eval'`
+    };
+    style-src 'self' 'unsafe-eval' 'unsafe-inline';
+    img-src 'self' blob: data:;
+    connect-src 'self' http://127.0.0.1 https://uksouth-1.in.applicationinsights.azure.com https://ukwest-0.in.applicationinsights.azure.com https://js.monitor.azure.com https://region1.google-analytics.com;
+    font-src 'self'  https://pro.fontawesome.com/ https://fonts.gstatic.com/ ;
+    object-src 'none';
+    base-uri 'self';
+    form-action 'self' ${process.env.NEXTAUTH_URL}; 
+    frame-ancestors 'none';
+    upgrade-insecure-requests;
+    frame-src https://datamap.gov.wales;
+`;
+
+    // csp += `base-uri 'self';`;
+    // csp += `script-src 'self' 'unsafe-eval' 'unsafe-inline' https://ukwest-0.in.applicationinsights.azure.com https://region1.google-analytics.com https://www.google-analytics.com/ https://tagmanager.google.com/ https://www.googletagmanager.com/;`;
+    // csp += `style-src 'self' 'unsafe-inline' https://pro.fontawesome.com/ https://www.google-analytics.com https://tagmanager.google.com/ https://www.googletagmanager.com/ https://fonts.googleapis.com/;`;
+    // csp += `img-src 'self' 'unsafe-inline' https://maps.gstatic.com  https://www.gov.wales https://gov.wales https://fonts.gstatic.com https://www.googletagmanager.com https://www.google-analytics.com https://ssl.gstatic.com/  blob: data:;`;
+    // csp += `connect-src 'self' http://127.0.0.1 https://uksouth-1.in.applicationinsights.azure.com https://ukwest-0.in.applicationinsights.azure.com https://js.monitor.azure.com https://region1.google-analytics.com;`;
+
+    // csp += `form-action 'self' ` + process.env.NEXTAUTH_URL + ` ;`;
+    // csp += `object-src 'self' data:;`;
+    // csp += `default-src 'self' https://www.google-analytics.com;`;
+
+    // csp += `font-src 'self' 'unsafe-inline' https://pro.fontawesome.com/ https://fonts.gstatic.com/ data:;`;
+    // csp += `frame-src https://datamap.gov.wales`;
+
+    // Replace newline characters and spaces
+    const contentSecurityPolicyHeaderValue = cspHeader
+        .replace(/\s{2,}/g, " ")
+        .trim();
+
+    const requestHeaders = new Headers(request.headers);
+    requestHeaders.set("x-nonce", nonce);
+    requestHeaders.set(
+        "Content-Security-Policy",
+        contentSecurityPolicyHeaderValue
+    );
+
+    const response = NextResponse.next({
+        request: {
+            headers: requestHeaders,
+        },
+    });
+    response.headers.set(
+        "Content-Security-Policy",
+        contentSecurityPolicyHeaderValue
+    );
+
+    return response;
+}
+
+export const config = {
+    matcher: [
+        /*
+         * Match all request paths except for the ones starting with:
+         * - api (API routes)
+         * - _next/static (static files)
+         * - _next/image (image optimization files)
+         * - favicon.ico (favicon file)
+         */
+        {
+            source: "/((?!api|_next/static|_next/image|favicon.ico).*)",
+            missing: [
+                { type: "header", key: "next-router-prefetch" },
+                { type: "header", key: "purpose", value: "prefetch" },
+            ],
+        },
+    ],
+};