How do I publish RSS using Javascript

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Javascript

WebAPI

AngularJs

Hi,

I have an Angular + ASP.Net WebAPI Application. I am posting a JSON query to an API and in return getting the RSS formatted feed.

$scope.rss = function(query){
   $http.post("api/url", query)
      .success(function(response){
         //I have RSS feed (xml string) in response
         //But cannot publish it as RSS
         /*response = "<?xml version="1.0" encoding="UTF-8" ?>
                         <rss version="2.0">
                           <channel>
                              ...
                           </channel>
                         </rss>"*/
      })
      .error(function(e){
         //error
      });
}

Now, my API accepts HttpPost, and I cannot use HttpGet because, the query can get really big. Is there any way to solve it?