CODEWITHSUNDEEP
node.jsexpressbinary
Tsuneo Yoshioka
Tsuneo Yoshioka

Reputation: 7874

Send a binary Buffer to client through http.ServerResponse in Node.js

I have a binary data(like image file) in Buffer object(not file), and want to serve the raw binary data to client through http.ServerResponse. How can I do it ?

Upvotes: 21

Views: 26100

Answers (2)

Gaurav Mogha
Gaurav Mogha

Reputation: 400

Using Axios for fetch the Binary data and send as Image

app.get(url, async (req, res) => {
  let { thread, blob } = req.params;
  try {
    let { data, body, headers } = await axios.get(...);
    res.end(data);
  } catch (e) {
    console.log("e", e);
    res.send("error");
  }
});

Upvotes: 0

Tsuneo Yoshioka
Tsuneo Yoshioka

Reputation: 7874

I managed to find out the answer. Just add "binary" encoding to both write() and end().

    res.write(buffer,'binary');
    res.end(null, 'binary');

Note that both "write" and "end" function requires the 'binary' encoding specified. Otherwise, the buffer is encoded as UTF-8. (So, JPEG header "ff d8 ff e0" will be "c3 bf c3 98 c3 bf c3 a0"...)

Upvotes: 37

Related Questions