media_upload/index.js

simplify upload file using multiparty to the server

var multiparty = require('multiparty'),
  fs = require('fs');
var gm = require('gm').subClass({
  imageMagick: true
});

exports.upload_file = function(http_request, settings, call_back) {
  var configrations = {};
  if (typeof(settings) === 'function') {
    configrations = JSON.parse(fs.readFileSync('./configuration.json', 'utf8'));
  }
  else {
    configrations.upload_to = settings.upload_to_folder;
    configrations.public_url = settings.public_url;
  }

  try {
    var size = '';
    var destination_path = '';
    var file_name = '';
    var form = new multiparty.Form();
    form.on('error', function(error) {
      return call_back(error, "");
    });

    form.on('file', function(name, file) {
      var temporal_path = file.path;
      destination_path = configrations.upload_to + file.originalFilename;
      file_name = file.originalFilename;
      var input_stream = fs.createReadStream(temporal_path);
      var output_stream = fs.createWriteStream(destination_path);
      input_stream.pipe(output_stream);

      input_stream.on('end', function() {
        fs.unlinkSync(temporal_path);
        if (fs.existsSync(configrations.upload_to + 'thump/') === false) {
            fs.mkdirSync(configrations.upload_to + 'thump/');
        }
        
        gm(configrations.upload_to + file_name).thumb(200, 200, configrations.upload_to + 'thump/' + file_name, 50, function(error){
          
        });
      });
    });

    form.on('close', function() {
      if (typeof(settings) === 'function') {
        settings("", configrations.public_url + file_name);
      }
      else {
        call_back("", configrations.public_url + file_name);
      }
    });

    form.parse(http_request);
  }
  catch (exception) {
    if (typeof(settings) === 'function') {
      settings(exception, "");
    }
    else {
      call_back(exception, "");
    }
  }
};