gistfile1.txt

function fixOrientation(url, cb) {
  // this function takes an s3 image
  // check if it needs to be rotated
  // if so, it creates a new version rotated
  // uploads to S3
  // and passes the url back
  var exif = require('exif').ExifImage;
  var easyimg = require('easyimage');
  var path = require('path'), fs = require('fs-extra'), request = require('request');

  sails.log.debug('checking exif tags for  rotation');
  var filename = path.basename(url);
  var pic = {
    source_url: url,
    dest_dir: sails.config.appPath + "/.tmp/" + filename
  };
  pic.stream = fs.createWriteStream(pic.dest_dir);
  sails.log.debug(url, 'downloading to .tmp');
  pic.stream.on('close', function () {
    sails.log.debug('photo downloaded ' + pic.source_url);
    try {
      new exif(pic.dest_dir, function (error, exifData) {
        if (error) {
          console.log('Error: ' + error.message);
          return cb(error, url);
        } else {
          console.log(exifData); // Do something with your data!
          var orientation, width, height;
          try {
            orientation = exifData.image.Orientation;
            width = exifData.exif.ExifImageWidth;
            height = exifData.exif.ExifImageHeight;
          } catch (e) {
            //  sails.log.error(e);
            return cb(e, url);
          }
          var rot = null;
          switch (orientation) {
            case 3:
              rot = 180;
              break;
            case 6:
              rot = 90;
              break;
            case 8:
              rot = 270;
              break;
          }
          if (rot) {
            sails.log.debug(url, 'needs rotating ' + rot + ' degrees');

            var new_filename = 'reoriented_' + filename;
            var new_dst = sails.config.appPath + "/.tmp/" + new_filename;
            easyimg.rotate({
              src: pic.dest_dir,
              dst: new_dst,
              degree: rot
            }).then(function (result) {
              sails.log.debug(url, 'created new rotated image', result);

              S3.uploadS3(new_dst, new_filename,
                function (err, res) {
                  sails.log.debug('res', res);
                  sails.log.debug('putting photo to S3 ' + new_filename);
                  if (err) {
                    throw err;
                  }
                  //delete local files when done
                  fs.unlinkSync(new_dst); //clean up
                  fs.unlinkSync(pic.dest_dir);
                  return cb(null, (res) ? res.Location : null);
                });


            }, function (error) {
              sails.log.error(error);
            }).finally(function (err) {
              sails.log.info('we got to finally', err)
              if (err) {
                sails.log.error(error);
              }
              // return cb(null, (res) ? res.Location : null);

            })

          } else {
            return cb(null, url);
          }
        }
      });
    } catch (error) {
      console.log('Error: ' + error.message);
      cb(error, url)
    }


  });
  request(pic.source_url).pipe(pic.stream); //refers back


}