thekarel · March 2, 2020 12:48 · Mar 2, 2020
diff --git a/fetchOnceAndSaveToDiskWithBuffer.js b/fetchOnceAndSaveToDiskWithBuffer.js
@@ -0,0 +1,21 @@
+async function fetchOnceAndSaveToDiskWithBuffer(url, filename) {
+  return new Promise(resolve => {
+    if (fs.existsSync(filename)) {
+      resolve(readFile(filename));
+
+      return;
+    }
+
+    const file = fs.createWriteStream(filename);
+
+    console.log(`  * Downloading from: ${url}`);
+
+    https.get(url, (response) => {
+      const unzip = zlib.createGunzip();
+      response.pipe(unzip).pipe(file);
+      unzip.on('end', () => {
+        resolve(readFile(filename));
+      });
+    });
+  });
+}