My websites are caching the REST requests. I am happy with the speed of the websites and would like to retain the cache. However, I have discovered that the same file is returned after I have made a POST/PUT/DELETE request. This means that the updated database isn't called. The same happens after refreshing the page. I would like to have updated information from the database after a POST/PUT/DELETE request.
I am just wondering if I can maybe set a conditional statement to cache the files if the last REST request isn't POST/PUT/DELETE? The website is hosted on a shared web hosting platform and I can amend the .htaccess file. Greatly appreciated for any ideas. I hope my explanation is clear but please feel free to reach out if it's not. Thank you in advance
CodePudding user response：
To stop browser caching we can add the below properties in an HTML as meta headers.
Cache-Control: no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: 0
We have to save the above headers in the html page which will be among the parent HTMLs to be used.
<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Expires" content="0">
The below code can be used from java servlet or nodejs
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
response.setHeader("Expires", "0");
servlet code sample as follows
public void doGet(HttpServletRequest req,HttpServletResponse response) throws ServletException,IOException
{
if(req.get[some field name].equals("last_request")){
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
response.setHeader("Expires", "0");
}
}
Below link can be a reference of this thread