c# - ASP.NET Web API Controller output is always buffered -

how send output without buffering? defined api controller way:

public class defaultcontroller : apicontroller {     [httpget]     [route]     public httpresponsemessage get()     {         var response = request.createresponse();         response.content = new pushstreamcontent(             (output, content, context) =>             {                 using (var writer = new streamwriter(output))                 {                     (int = 0; < 5; i++)                     {                         writer.writeline("eh?");                         writer.flush();                         thread.sleep(2000);                     }                 }             },             "text/plain");          return response;     } } 

output appears in browser @ once, looks waits start sending till completion. defined attribute:

[attributeusage(attributetargets.class, allowmultiple = false)] class nobufferattribute : attribute, icontrollerconfiguration {     public void initialize(httpcontrollersettings controllersettings, httpcontrollerdescriptor controllerdescriptor)     {         controllersettings.services.replace(             typeof(ihostbufferpolicyselector),             new bufferpolicy());     }      class bufferpolicy : ihostbufferpolicyselector     {         public bool usebufferedinputstream(object hostcontext)         {             return false;         }          public bool usebufferedoutputstream(httpresponsemessage response)         {             return false;         }     } } 

and applied controller:

    [nobuffer]     public class defaultcontroller : apicontroller     {           ...     } 

it did not help. output appears in browser same time.

update

it looks problem flushing. changed code following:

        var response = request.createresponse();         response.content = new pushstreamcontent(             (output, content, context) =>             {                 using (var writer = new streamwriter(output))                                     {                     var s = stopwatch.startnew();                     while (s.elapsed < timespan.fromseconds(10))                     {                         writer.writeline(s.elapsed);                         writer.flush();                                                 }                 }             },             "text/plain"); 

now can see output in progress. disabling gzip encoding not see content in smaller chunks.