feat: 初始提交

src/server/static.ts

@@ -0,0 +1,60 @@
+export interface StaticAssets {
+  files: Record<string, Blob>;
+  indexHtml: Blob;
+}
+
+const CONTENT_TYPES: Record<string, string> = {
+  ".css": "text/css; charset=utf-8",
+  ".html": "text/html; charset=utf-8",
+  ".js": "text/javascript; charset=utf-8",
+  ".json": "application/json; charset=utf-8",
+  ".mjs": "text/javascript; charset=utf-8",
+  ".png": "image/png",
+  ".svg": "image/svg+xml",
+  ".woff": "font/woff",
+  ".woff2": "font/woff2",
+};
+
+export function contentTypeFor(path: string): string {
+  const dot = path.lastIndexOf(".");
+  if (dot === -1) return "application/octet-stream";
+  const ext = path.slice(dot);
+  return CONTENT_TYPES[ext] ?? "application/octet-stream";
+}
+
+export function hasFileExtension(path: string): boolean {
+  const lastSlash = path.lastIndexOf("/");
+  const segment = lastSlash === -1 ? path : path.slice(lastSlash + 1);
+  return segment.includes(".");
+}
+
+export function htmlResponse(html: Blob): Response {
+  return new Response(html, {
+    headers: {
+      "Cache-Control": "no-cache",
+      "Content-Type": "text/html; charset=utf-8",
+    },
+  });
+}
+
+export function serveStaticAsset(pathname: string, assets: StaticAssets): Response {
+  if (pathname === "/") {
+    return htmlResponse(assets.indexHtml);
+  }
+
+  const file = assets.files[pathname];
+  if (file) {
+    return new Response(file, {
+      headers: {
+        "Cache-Control": "public, max-age=31536000, immutable",
+        "Content-Type": contentTypeFor(pathname),
+      },
+    });
+  }
+
+  if (hasFileExtension(pathname)) {
+    return new Response("Not found", { status: 404 });
+  }
+
+  return htmlResponse(assets.indexHtml);
+}