lambda-multipart

A simple multipart/form-data parser for AWS lambda functions.

npm install -S lambda-multipart

var Multipart = require('lambda-multipart');
 
exports.handler = function(event, context, callback){
 
  var parser = new Multipart(event);
 
  parser.on('field',function(key, value){
    console.log('received field', key, value);
  });
  parser.on('file',function(file){
    //file.headers['content-type']
    file.pipe(fs.createWriteStream(__dirname+"/downloads/"+file.filename));
  });
 
  parser.on('finish',function(result){
    //result.files (array of file streams)
    //result.fields (object of field key/values)
    console.log("Finished")
  });
}

AWS Setup

There is a small bit of setup on the AWS side. Head to the API Gateway service you want to setup and select:

Settings > Binary Media Types

Add a new entry for multipart/form-data

Credits and Acknowledgements

• @hapijs for https://github.com/hapijs/pez
• @myshenin for https://github.com/myshenin/aws-lambda-multipart-parser