Create new example http-file-extended.ts (#1827)

New code sample with http Range and ETag support
Some code is taken from here https://github.com/gornostay25/svelte-adapter-bun/blob/master/src/sirv.js

1 files changed, 76 insertions, 0 deletions

diff --git a/examples/http-file-extended.ts b/examples/http-file-extended.ts
new file mode 100644
index 000000000..7ae515f14
--- /dev/null
+++ b/examples/http-file-extended.ts
@@ -0,0 +1,76 @@
+import { file, serve } from "bun";
+import { existsSync, statSync } from "fs";
+
+serve({
+  fetch(req: Request) {
+    let pathname = new URL(req.url).pathname.substring(1);
+    if (pathname == "") {
+      pathname = import.meta.url.replace("file://", "");
+    }
+
+    if (!existsSync(pathname)) {
+      return new Response(null, { status: 404 });
+    }
+
+    const stats = statSync(pathname);
+
+    // https://github.com/gornostay25/svelte-adapter-bun/blob/master/src/sirv.js
+    const headers = new Headers({
+      "Content-Length": "" + stats.size,
+      "Last-Modified": stats.mtime.toUTCString(),
+      ETag: `W/"${stats.size}-${stats.mtime.getTime()}"`,
+    });
+
+    if (req.headers.get("if-none-match") === headers.get("ETag")) {
+      return new Response(null, { status: 304 });
+    }
+
+    const opts = { code: 200, start: 0, end: Infinity, range: false };
+
+    if (req.headers.has("range")) {
+      opts.code = 206;
+      let [x, y] = req.headers.get("range").replace("bytes=", "").split("-");
+      let end = (opts.end = parseInt(y, 10) || stats.size - 1);
+      let start = (opts.start = parseInt(x, 10) || 0);
+
+      if (start >= stats.size || end >= stats.size) {
+        headers.set("Content-Range", `bytes */${stats.size}`);
+        return new Response(null, {
+          headers: headers,
+          status: 416,
+        });
+      }
+
+      headers.set("Content-Range", `bytes ${start}-${end}/${stats.size}`);
+      headers.set("Content-Length", "" + (end - start + 1));
+      headers.set("Accept-Ranges", "bytes");
+      opts.range = true;
+    }
+
+    if (opts.range) {
+      return new Response(file(pathname).slice(opts.start, opts.end), {
+        headers,
+        status: opts.code,
+      });
+    }
+
+    return new Response(file(pathname), { headers, status: opts.code });
+  },
+
+  // this is called when fetch() throws or rejects
+  // error(err: Error) {
+  // return new Response("uh oh! :(" + String(err.toString()), { status: 500 });
+  // },
+
+  // this boolean enables the bun's default error handler
+  // sometime after the initial release, it will auto reload as well
+  development: process.env.NODE_ENV !== "production",
+  // note: this isn't node, but for compatibility bun supports process.env + more stuff in process
+
+  // SSL is enabled if these two are set
+  // certFile: './cert.pem',
+  // keyFile: './key.pem',
+
+  port: 3000, // number or string
+  hostname: "localhost", // defaults to 0.0.0.0
+});