c# - ASP.net cache ASHX file server-side -

given generic handler:

<%@ webhandler language="c#" class="autocomp" %>  using system; using system.text; using system.text.regularexpressions; using system.web; using system.web.ui;  public class autocomp : ihttphandler {      public void processrequest (httpcontext context) {          context.response.contenttype = "application/json";         context.response.bufferoutput = true;          var searchterm = (context.request.querystring["name_startswith"] + "").trim();          context.response.write(searchterm);         context.response.write(datetime.now.tostring("s"));          context.response.flush();     }      public bool isreusable {         {             return false;         }     }  } 

how server side cache file 1 hour based on name_startswith query string parameter? web user controls it's easy:

<%@ outputcache duration="120" varybyparam="paramname" %> 

but i've been looking around while same generic handler (ashx) file , can't find solutions.

with code you've provided you're telling end user browser cache results 30 minutes, aren't doing server side caching.

if want cache results server side you're looking httpruntime.cache. allow insert item cache globally available. on page load want check existence of cached item, if item doesn't exist or expired in cache, go database , retrieve objects.

edit

with updated code sample, found https://stackoverflow.com/a/6234787/254973 worked in tests. in case do:

public class autocomp : ihttphandler {     public void processrequest(httpcontext context)     {         outputcachedpage page = new outputcachedpage(new outputcacheparameters         {             duration = 120,             location = outputcachelocation.server,             varybyparam = "name_startswith"         });          page.processrequest(httpcontext.current);          context.response.contenttype = "application/json";         context.response.bufferoutput = true;          var searchterm = (context.request.querystring["name_startswith"] + "").trim();          context.response.write(searchterm);         context.response.write(datetime.now.tostring("s"));     }      public bool isreusable     {                 {             return false;         }     }     private sealed class outputcachedpage : page     {         private outputcacheparameters _cachesettings;          public outputcachedpage(outputcacheparameters cachesettings)         {             // tracing requires page ids unique.             id = guid.newguid().tostring();             _cachesettings = cachesettings;         }          protected override void frameworkinitialize()         {             base.frameworkinitialize();             initoutputcache(_cachesettings);         }     } }