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backend/node_modules/@hono/node-server/dist/serve-static.mjs

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+// src/serve-static.ts
+import { getMimeType } from "hono/utils/mime";
+import { createReadStream, statSync, existsSync } from "fs";
+import { join } from "path";
+import { versions } from "process";
+import { Readable } from "stream";
+var COMPRESSIBLE_CONTENT_TYPE_REGEX = /^\s*(?:text\/[^;\s]+|application\/(?:javascript|json|xml|xml-dtd|ecmascript|dart|postscript|rtf|tar|toml|vnd\.dart|vnd\.ms-fontobject|vnd\.ms-opentype|wasm|x-httpd-php|x-javascript|x-ns-proxy-autoconfig|x-sh|x-tar|x-virtualbox-hdd|x-virtualbox-ova|x-virtualbox-ovf|x-virtualbox-vbox|x-virtualbox-vdi|x-virtualbox-vhd|x-virtualbox-vmdk|x-www-form-urlencoded)|font\/(?:otf|ttf)|image\/(?:bmp|vnd\.adobe\.photoshop|vnd\.microsoft\.icon|vnd\.ms-dds|x-icon|x-ms-bmp)|message\/rfc822|model\/gltf-binary|x-shader\/x-fragment|x-shader\/x-vertex|[^;\s]+?\+(?:json|text|xml|yaml))(?:[;\s]|$)/i;
+var ENCODINGS = {
+  br: ".br",
+  zstd: ".zst",
+  gzip: ".gz"
+};
+var ENCODINGS_ORDERED_KEYS = Object.keys(ENCODINGS);
+var pr54206Applied = () => {
+  const [major, minor] = versions.node.split(".").map((component) => parseInt(component));
+  return major >= 23 || major === 22 && minor >= 7 || major === 20 && minor >= 18;
+};
+var useReadableToWeb = pr54206Applied();
+var createStreamBody = (stream) => {
+  if (useReadableToWeb) {
+    return Readable.toWeb(stream);
+  }
+  const body = new ReadableStream({
+    start(controller) {
+      stream.on("data", (chunk) => {
+        controller.enqueue(chunk);
+      });
+      stream.on("error", (err) => {
+        controller.error(err);
+      });
+      stream.on("end", () => {
+        controller.close();
+      });
+    },
+    cancel() {
+      stream.destroy();
+    }
+  });
+  return body;
+};
+var getStats = (path) => {
+  let stats;
+  try {
+    stats = statSync(path);
+  } catch {
+  }
+  return stats;
+};
+var serveStatic = (options = { root: "" }) => {
+  const root = options.root || "";
+  const optionPath = options.path;
+  if (root !== "" && !existsSync(root)) {
+    console.error(`serveStatic: root path '${root}' is not found, are you sure it's correct?`);
+  }
+  return async (c, next) => {
+    if (c.finalized) {
+      return next();
+    }
+    let filename;
+    if (optionPath) {
+      filename = optionPath;
+    } else {
+      try {
+        filename = decodeURIComponent(c.req.path);
+        if (/(?:^|[\/\\])\.\.(?:$|[\/\\])/.test(filename)) {
+          throw new Error();
+        }
+      } catch {
+        await options.onNotFound?.(c.req.path, c);
+        return next();
+      }
+    }
+    let path = join(
+      root,
+      !optionPath && options.rewriteRequestPath ? options.rewriteRequestPath(filename, c) : filename
+    );
+    let stats = getStats(path);
+    if (stats && stats.isDirectory()) {
+      const indexFile = options.index ?? "index.html";
+      path = join(path, indexFile);
+      stats = getStats(path);
+    }
+    if (!stats) {
+      await options.onNotFound?.(path, c);
+      return next();
+    }
+    const mimeType = getMimeType(path);
+    c.header("Content-Type", mimeType || "application/octet-stream");
+    if (options.precompressed && (!mimeType || COMPRESSIBLE_CONTENT_TYPE_REGEX.test(mimeType))) {
+      const acceptEncodingSet = new Set(
+        c.req.header("Accept-Encoding")?.split(",").map((encoding) => encoding.trim())
+      );
+      for (const encoding of ENCODINGS_ORDERED_KEYS) {
+        if (!acceptEncodingSet.has(encoding)) {
+          continue;
+        }
+        const precompressedStats = getStats(path + ENCODINGS[encoding]);
+        if (precompressedStats) {
+          c.header("Content-Encoding", encoding);
+          c.header("Vary", "Accept-Encoding", { append: true });
+          stats = precompressedStats;
+          path = path + ENCODINGS[encoding];
+          break;
+        }
+      }
+    }
+    let result;
+    const size = stats.size;
+    const range = c.req.header("range") || "";
+    if (c.req.method == "HEAD" || c.req.method == "OPTIONS") {
+      c.header("Content-Length", size.toString());
+      c.status(200);
+      result = c.body(null);
+    } else if (!range) {
+      c.header("Content-Length", size.toString());
+      result = c.body(createStreamBody(createReadStream(path)), 200);
+    } else {
+      c.header("Accept-Ranges", "bytes");
+      c.header("Date", stats.birthtime.toUTCString());
+      const parts = range.replace(/bytes=/, "").split("-", 2);
+      const start = parseInt(parts[0], 10) || 0;
+      let end = parseInt(parts[1], 10) || size - 1;
+      if (size < end - start + 1) {
+        end = size - 1;
+      }
+      const chunksize = end - start + 1;
+      const stream = createReadStream(path, { start, end });
+      c.header("Content-Length", chunksize.toString());
+      c.header("Content-Range", `bytes ${start}-${end}/${stats.size}`);
+      result = c.body(createStreamBody(stream), 206);
+    }
+    await options.onFound?.(path, c);
+    return result;
+  };
+};
+export {
+  serveStatic
+};