Можно ли автоматически проверять страницу на предмет обновления информации?

Например, с помощью расширения для Chrome или отдельной программы.
Отдельно интересует подобное в отношении сайта из внутреннего корпоративного ресурса.
Спасибо!
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@Sha644
Можно. Curl.
Много текста
Hypertext Transfer Protocol -- HTTP/1.1 - 10 Statu...

10.3.5 304 Not Modified

If the client has performed a conditional GET request and access is allowed, but the document has not been modified, the server SHOULD respond with this status code. The 304 response MUST NOT contain a message-body, and thus is always terminated by the first empty line after the header fields.

The response MUST include the following header fields:

- Date, unless its omission is required by section 14.18.1

If a clockless origin server obeys these rules, and proxies and clients add their own Date to any response received without one (as already specified by [RFC 2068], section 14.19), caches will operate correctly.

- ETag and/or Content-Location, if the header would have been sent
in a 200 response to the same request

- Expires, Cache-Control, and/or Vary, if the field-value might
differ from that sent in any previous response for the same
variant

If the conditional GET used a strong cache validator (see section 13.3.3), the response SHOULD NOT include other entity-headers. Otherwise (i.e., the conditional GET used a weak validator), the response MUST NOT include other entity-headers; this prevents inconsistencies between cached entity-bodies and updated headers.

If a 304 response indicates an entity not currently cached, then the cache MUST disregard the response and repeat the request without the conditional.

If a cache uses a received 304 response to update a cache entry, the cache MUST update the entry to reflect any new field values given in the response.
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@DWZ
Программа Check & Get - мониторит изменения заданных страниц с заданной периодичностью. Или вручную запускаешь поиск разницы с предыдущим таким запуском.
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