What is no-cache header?
The no-cache directive means that a browser may cache a response, but must first submit a validation request to an origin server.
What happens if there is no-Cache-Control header?
Without the cache control header the browser requests the resource every time it loads a new(?) page.
How do I ignore Cache-Control headers?
If specified, HTTP request cache-control headers are ignored for caching decisions. This option available under Web Sites > Traffic management > Caching > Edit the service and set the value of ‘Ignore Request Headers’ to Yes.
What should you add to a Cache-Control response header?
For the files in the application that will not change, you can usually add aggressive caching by sending the response header below. This includes static files that are served by the application such as images, CSS files and JavaScript files, for example. In addition, see also the Expires header.
Where do I put cache-control headers?
To use cache-control in HTML, you use the meta tag, e.g. The value in the content field is defined as one of the four values below. HTTP 1.1. Allowed values = PUBLIC | PRIVATE | NO-CACHE | NO-STORE.
How do I view cache control headers?
An HTTP/1.1 origin server should send both, the ETag and the Last-Modified value. More details can be found in section 13.3. 4 in the RFC2616. You can check your HTTP Cache Headers using KeyCDN’s HTTP Header Checker tool.
Where do I put cache control headers?
What is vary accept Encoding header?
It is allowing the cache to serve up different cached versions of the page depending on whether or not the browser requests GZIP encoding or not. The vary header instructs the cache to store a different version of the page if there is any variation in the indicated header.
Can You Use pragma no-cache as a request header?
Later, the HTTP/1.1 spec states that the Pragma: no-cache response should be handled as Cache-Control: no-cache, but it’s not a reliable replacement due to the fact that it’s still a request header. I also keep using Pragma: no-cache as an OWASP security recommendation.
Why do I need to set nocache headers in WordPress?
Set the headers to prevent caching for the different browsers. Different browsers support different nocache headers, so several headers must be sent so that all of them get the point that no caching should occur. Introduced.
What does the Cache-Control header in http mean?
The Cache-Control HTTP header holds directives (instructions) for caching in both requests and responses. A given directive in a request does not mean the same directive should be in the response. Caching directives have the following rules to be valid: Case-insensitive, but lowercase is recommended.
Why do I need no cache header in Netscape?
Including the Pragma: no-cache header is a precaution that protects legacy servers that don’t support newer cache control mechanisms and could cache what you don’t intend to be cached. Some would argue that unless you have to support Internet Explorer 5 or Netscape, you don’t need Prama or Expires.