- Type:
object
ETag and Last-Modified headers returned by your server during the previous crawl.
These values are included in subsequent requests as the If-None-Match and If-Modified-Since headers.
If your server responds with 304 Not Modified,
the crawler doesn’t download or parse the page again.
Instead, it reuses the existing records in your production index.
This means your index stays up to date while minimizing unnecessary data transfers.
The crawler doesn’t send conditional requests:
- If your configuration changed since the last crawl
- If the external data associated with this page changed since the last crawl
Examples
JavaScript
Parameters
Whether to turn on the cache.