lastModified header

[viktor-svirsky]

Hi @marevol,
Our main idea to get actual page modified date. In our system, we already stored pages with timestamp values. In this case, we need to reuse lastModified header value if it present in crawled records.
We need to convert lastModified date value to timestamp value like '1504887075' for future ordering. If the record doesn't include lastModified value, we prefer use @timestamp value.

Example:

lastModified: "2017-09-04T14:58:57.000Z",
timestamp: "1504887075", //<<<==== this value generated based on lastModified or @timestamp values
@timestamp: "2017-09-08T16:11:31.546Z"

Is it possible to rewrite logic, that could cover our expectations?

Thanks