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joplin notion extension/Web Development/nodejs/Downloading and transferring blobs.md

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+Downloading and transferring blobs
+
+```js
+fetch(url)
+    .then((res) => res.blob())
+    .then(async (blob) => {
+      console.log("got blob");
+      console.log("Took " + (Date.now() - initialTime) / 1000 + "s");
+      //   const title = "video";
+
+      //   const file = await res.blob();
+      const arrayBuffer = await blob.arrayBuffer();
+      const buffer = Buffer.from(arrayBuffer);
+
+      // console.log("bytelength: ", buffer.byteLength());
+      //   const arrayByte = new Uint8Array(arrayBuffer);
+
+      res.writeHead(200, {
+        "content-type": "application/octet-stream",
+      });
+
+      console.log("converted to buffer");
+      res.write(buffer);
+      //   const writeStream = fs.createWriteStream(arrayByte);
+
+      //   res.sendFile(buffer);
+      res.end();
+      //   const buffer = Buffer.from(file, "binary");
+      //   file.pipe(fs.createWriteStream(`${title}.mp4`));
+      //   fs.writeFileSync(`${title}12.mp4`, buffer);
+    })
+    .catch((err) => console.log(err));
+```