Send a file in post method in aws lambda

Question

Is it possible to send a file (whole file) as POST method in Lambda using node.js ? I can send the form data in a simple way using the modules available. But i want to send the file in lambda to an EndPoint URL where this URL will take care of the manipulation,data rendering etc and send me the response. What i am looking is it possible to implement using any modules or any help is appreciated .

Answer 1

Looks like you're already using request module.

in this case all you need to post multipart/form-data is to use its form feature:

var req = request.post(url, function (err, resp, body) {
  if (err) {
    console.log('Error!');
  } else {
    console.log('URL: ' + body);
  }
});
var form = req.form();
form.append('file', '<FILE_DATA>', {
  filename: 'myfile.txt',
  contentType: 'text/plain'
});

but if you want to post some existing file from your file system, then you may simply pass it as a readable stream:

form.append('file', fs.createReadStream(filepath));

request will extract all related metadata by itself.

For more information on posting multipart/form-data see node-form-data module, which is internally used by request.