code: function toAwsParams(file) {
    var params = {};
  
    var headers = file.s3.headers || {};
  
    for (var header in headers) {
      if (header === 'x-amz-acl') {
        params.ACL = headers[header];
      } else if (header === 'Content-MD5') {
        params.ContentMD5 = headers[header];
      } else {
        params[pascalCase(header)] = headers[header];
      }
    }
  
    params.Key = file.s3.path;
    params.Body = file.contents;
  
    return params;
  }
docs: Turn the HTTP style headers into AWS Object params