Fix: token parsing bug causing proxyToSandbox to fail (#147)

Author: AshishKumar4

.changeset/polite-kiwis-speak.md

@@ -0,0 +1,5 @@
+---
+"@cloudflare/sandbox": minor
+---
+
+Fix token extraction regex causing Invalid token errors

packages/sandbox/src/request-handler.ts

@@ -105,7 +105,8 @@ export async function proxyToSandbox<E extends SandboxEnv>(
 
 function extractSandboxRoute(url: URL): RouteInfo | null {
   // Parse subdomain pattern: port-sandboxId-token.domain (tokens mandatory)
-  const subdomainMatch = url.hostname.match(/^(\d{4,5})-([^.-][^.]*[^.-]|[^.-])-([a-zA-Z0-9_-]{12,20})\.(.+)$/);
+  // Token is always exactly 16 chars (generated by generatePortToken)
+  const subdomainMatch = url.hostname.match(/^(\d{4,5})-([^.-][^.]*?[^.-]|[^.-])-([a-z0-9_-]{16})\.(.+)$/);
 
   if (!subdomainMatch) {
     return null;