Add HTML fallback routing to resolve_worker_from_request

Allow requests with .html extension to match prerendered routes without
the extension. For example, /about.html will now match route /about.

This eliminates the need to duplicate HTML routes in both static and
prerendered arrays, keeping only the extensionless version in prerendered.

Author: max-lt

migrations/23_html_fallback_routing.sql

@@ -0,0 +1,127 @@
+--
+-- OpenWorkers Database Schema - Add HTML fallback routing
+--
+-- Allow requests with .html extension to match prerendered routes
+-- without the extension. For example, /about.html matches route /about.
+--
+
+BEGIN;
+
+-- ============================================================================
+-- Update resolve_worker_from_request to handle .html fallback
+-- ============================================================================
+
+CREATE OR REPLACE FUNCTION resolve_worker_from_request(
+    p_domain varchar DEFAULT NULL,
+    p_worker_id uuid DEFAULT NULL,
+    p_worker_name varchar DEFAULT NULL,
+    p_path varchar DEFAULT '/'
+)
+RETURNS request_resolution AS $$
+DECLARE
+    v_result request_resolution;
+    v_worker_id_temp uuid;
+    v_project_id_temp uuid;
+    v_route_record RECORD;
+BEGIN
+    -- Priority 1: Direct worker_id (used for service bindings, worker-to-worker calls)
+    IF p_worker_id IS NOT NULL THEN
+        v_result.worker_id := p_worker_id;
+        v_result.project_id := NULL;
+        v_result.backend_type := 'worker'::enum_backend_type;
+        v_result.assets_storage_id := NULL;
+        v_result.priority := NULL;
+        RETURN v_result;
+    END IF;
+
+    -- Priority 2: Resolve project_id/worker_id from worker_name (subdomain) or domain (custom domain)
+    IF p_worker_name IS NOT NULL THEN
+        -- Subdomain case: name.workers.rocks → lookup in endpoints
+        -- Projects have priority over standalone workers for routing
+        SELECT project_id, worker_id
+        INTO v_project_id_temp, v_worker_id_temp
+        FROM endpoints
+        WHERE name = p_worker_name
+        ORDER BY type DESC  -- 'project' > 'worker' alphabetically
+        LIMIT 1;
+
+        IF NOT FOUND THEN
+            RETURN NULL;  -- Endpoint not found
+        END IF;
+    ELSIF p_domain IS NOT NULL THEN
+        -- Custom domain case: example.com → lookup in domains
+        SELECT project_id, worker_id
+        INTO v_project_id_temp, v_worker_id_temp
+        FROM domains
+        WHERE name = p_domain;
+
+        IF NOT FOUND THEN
+            RETURN NULL;  -- Domain not found
+        END IF;
+    ELSE
+        -- No identifier provided
+        RETURN NULL;
+    END IF;
+
+    -- If we have a project, match route pattern
+    IF v_project_id_temp IS NOT NULL THEN
+        SELECT backend_type, worker_id, priority
+        INTO v_route_record
+        FROM project_routes
+        WHERE project_id = v_project_id_temp
+          AND (
+            pattern = p_path
+            OR (pattern LIKE '%/*' AND p_path LIKE REPLACE(pattern, '/*', '') || '%')
+            -- Allow /about.html to match route /about (prerendered fallback)
+            OR (p_path LIKE '%.html' AND pattern = REPLACE(p_path, '.html', ''))
+          )
+        ORDER BY priority DESC
+        LIMIT 1;
+
+        IF NOT FOUND THEN
+            RETURN NULL;  -- No route matches
+        END IF;
+
+        v_result.project_id := v_project_id_temp;
+        v_result.worker_id := v_route_record.worker_id;
+        v_result.backend_type := v_route_record.backend_type;
+        v_result.priority := v_route_record.priority;
+
+        -- If storage backend, get ASSETS storage_config_id from main worker's environment
+        IF v_route_record.backend_type = 'storage' THEN
+            SELECT value::uuid
+            INTO v_result.assets_storage_id
+            FROM environment_values ev
+            JOIN workers w ON w.environment_id = ev.environment_id
+            WHERE w.id = v_project_id_temp  -- main worker has same id as project
+              AND ev.key = 'ASSETS'
+              AND ev.type = 'assets';
+
+            IF v_result.assets_storage_id IS NULL THEN
+                RETURN NULL;  -- ASSETS binding not found
+            END IF;
+        ELSE
+            v_result.assets_storage_id := NULL;
+        END IF;
+
+        RETURN v_result;
+    END IF;
+
+    -- If we have a standalone worker (not in a project)
+    IF v_worker_id_temp IS NOT NULL THEN
+        v_result.worker_id := v_worker_id_temp;
+        v_result.project_id := NULL;
+        v_result.backend_type := 'worker'::enum_backend_type;
+        v_result.assets_storage_id := NULL;
+        v_result.priority := NULL;
+        RETURN v_result;
+    END IF;
+
+    -- Nothing matched
+    RETURN NULL;
+END;
+$$ LANGUAGE plpgsql;
+
+COMMENT ON FUNCTION resolve_worker_from_request(varchar, uuid, varchar, varchar) IS 'Resolves endpoint and route with .html fallback support for prerendered routes';
+
+COMMIT;