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The client may then decide to cache the representation, along with its ETag. Later, if the client wants to retrieve the same URL resource again, it will first determine whether the locally cached version of the URL has expired (through the Cache-Control and the Expire headers). If the URL has not expired, it will retrieve the locally cached ...
A search engine cache is a cache of web pages that shows the page as it was when it was indexed by a web crawler. Cached versions of web pages can be used to view the contents of a page when the live version cannot be reached , has been altered or taken down .
When a search engine visits a site, the robots.txt located in the root directory is the first file crawled. The robots.txt file is then parsed and will instruct the robot as to which pages are not to be crawled. As a search engine crawler may keep a cached copy of this file, it may on occasion crawl pages a webmaster does not wish to crawl.
A forward cache is a cache outside the web server's network, e.g. in the client's web browser, in an ISP, or within a corporate network. A network-aware forward cache only caches heavily accessed items. A proxy server sitting between the client and web server can evaluate HTTP headers and choose whether to store web content.
The ETag (entity tag) header field is used to determine if a cached version of the requested resource is identical to the current version of the resource on the server. "Content-Type" specifies the Internet media type of the data conveyed by the HTTP message, while "Content-Length" indicates its length in bytes.
If the web application exceeds more than one page then each page must have a manifest attribute that points to the cache manifest. Every page referencing the manifest will be stored locally. [6] The cache manifest file is a text file located in another part of the server. It must be served with content type text/cache-manifest [7]
button. Make sure the box for "Cached Web Content" is checked and click "Clear", (be sure the "Cookies and Site Data" box is unchecked if you do not want to clear this data as well). In versions of Firefox that display a single, orange "Firefox" button: click the "Firefox" button and click "Options".
The cache feature of Google is one of the few areas of transparencies by Google, where it shows what it bases its results on. -- Rob ( talk ) 20:43, 18 February 2009 (UTC) [ reply ] I think he means (maybe, I can't really tell) that anyone who looks at a cache of a page available in an uncached form and concludes that the cached version ...