In the above table there are a significant number of HTTP Headers that have "X-" apppended to the header. Sites use this to bypass ad blocker plugins Header tells browser whether to expose the response to frontend JavaScript Specifies requests and responses caching mechanisms Non-standard HTTP response status (Status: 200 OK) Module for apache (and nginx) to increase performance Identifies object (and version) for caching purposesĪllows you to choose content search engines can crawl on the site HSTS informs browser to use HTTPS not HTTP Info incl version on software used by server Reveals time application takes to serve a request Header specifying compression (gzip / compress / deflates etc)Ī "Fastly" header: end to end request timing information Internet explorer header compatibility filter for blocking XSSĬonveys information for the request-response cycle Indicates if request was served from Drupal Cache (Hit or Miss) Tags the clients about the cache-group to which they belongĬontains the date/time after which the response object is considered staleĪmazon CloudFront ID (CloudFront requires this information for debugging.) Provides reason for a 'MISS' result in the x-cacheĮxposes information/meta data about the site such as version of software ID of the current request and the ID of the request that populated the Varnish cache Non-standard header related to caching, use can vary between different proxy & cdn networksĭata successfully located in cache memory Unique request ID that associates HTTP requests between a client and a server. Used for HTTP Cache validation and conditional requests using If-Match and If-None-Match Stops downloads opening directly in browser. Header used for adding troubleshooting information?Īn option for developers to set network error reporting. Rules which referrer information sent in the referrer header is incorporated with requests ![]() Specifies the version of ASP.NET being usedĭetails whether the response can be shared.Ĭompatiability header for old versions of Microsoft Internet Explorer (IE) and Edge Can be used for both forward and reverse proxies (requests & responses) Privacy Protocol that was not widely adoptedĬontrols which resources the client can load for the pageĪdded by proxies. Time in seconds resource has been in proxy cacheĭescribes the language(s) intended for the document Used by CDN's to specify whether resource in CDN cache matches server resource When enabled the Expect-CT header requests that Chrome checks certificates for the site appear in public CT logs. Prevents the use of mis-issued certificates for the site. Reporting and enforcement of Certificate Transparency. Specifies whether browser should show page in an iFrameĬloudFlare header shows whether a resource is cachedįorce communication to use HTTS (not HTTP)Įnables Cross Site Scripting (XSS) filtering Also used for tracking users with cookies disabled. A hashed value encoding information about the data center and the request.Ĭache Validation Tag. Used for caching.ĭisables MIME Sniffing and forces browser to use type shown in Content-TypeĬloudFlare Header. Specifies how long a persistent connection stays open ![]() Related to caching, may be implemented in different ways. Serialising one or more links in HTTP headers Can reveal sensitive information (version and software). Hosting and Backend Server Frameworks may use this. ![]() Specifies when the response becomes "stale" Details how to determine if cache can be used rather than a new response from serverĭetails caching options in requests and responses
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