Getting Binary Content in Node.Js Using Request

Getting binary content in Node.js using request

OK, after a lot of digging, I found out that requestSettings should have:

encoding: null

And then body will be of type Buffer, instead of the default, which is string.

Getting binary content in node.js with http.request

The accepted answer did not work for me (i.e., setting encoding to binary), even the user who asked the question mentioned it did not work.

Here's what worked for me, taken from: http://chad.pantherdev.com/node-js-binary-http-streams/

http.get(url.parse('http://myserver.com:9999/package'), function(res) {
    var data = [];

    res.on('data', function(chunk) {
        data.push(chunk);
    }).on('end', function() {
        //at this point data is an array of Buffers
        //so Buffer.concat() can make us a new Buffer
        //of all of them together
        var buffer = Buffer.concat(data);
        console.log(buffer.toString('base64'));
    });
});

Edit: Update answer following a suggestion by Semicolon

How to POST binary data in request using request library?

The option in request library to send binary data as such is encoding: null. The default value of encoding is string so contents by default get converted to utf-8.

So the correct way to send binary data in the above example would be:

const makeWitSpeechRequest = (audioBinary) => {
  request({
    url: 'https://api.wit.ai/speech?v=20160526',
    method: 'POST',
    body: audioBinary,
    encoding: null
  }, (error, response, body) => {
    if (error) {
       console.log('Error sending message: ', error)
    } else {
      console.log('Response: ', response.body)
    }
  })
}

Read binary data from request body of an HTTP trigger

The GitHub issue Azure Functions (node) doesn't process binary data properly describes the problem and suggests to set the Content-Type header to application/octet-stream.

curl -v \
 -X POST \
 -H 'Content-Type: application/octet-stream'
 --data-binary @resources/example.pdf \
 $function_url

# > Content-Length: 2505058

The Azure Function reads the request body with Buffer.from(req.body, 'binary').

const dataFromReq = new Uint8Array(Buffer.from(req.body, 'binary'));
context.log(`Read PDF file from request body with length ${dataFromReq.length}`);
// Read PDF file from request body with length 2505058

NodeJs send Binary Data with Request

Got it working , We need to create a stream of file using

fs.createReadStream(filename);

fs module.

request({
        url: 'http://localhost/wordpress/wp-json/wp/v2/media/',
        method: 'POST',
        headers: {
          'cache-control': 'no-cache',
          'content-disposition': 'attachment; filename=' + filename,
          'content-type' : 'image/jpg',
          'authorization' : 'Basic token'
        },
        encoding: null,
        body: fs.createReadStream('C://Users/as/Desktop/App _Ideas/hh.jpg')
       }, (error, response, body) => {
            if (error) {
               res.json({name : error});
            } else {
              res.json(JSON.parse(response.body.toString()));
            }
       });

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