Blog: 2015 May

Post-process the HTML output of an action in ASP.NET MVC

May 5, 2015, (updated on December 16, 2015), 2 comments, Software Development

This article shows how to implement a post-processor for an ASP.NET MVC application, which transforms the output of an controller action before it is transmitted to the client. The obvious way to do this is by implementing a custom action filter. First, we implement the base filter class: public abstract class OutputProcessorActionFilterAttribute : ActionFilterAttribute { protected abstract string Process(string data); public override void OnResultExecuted(ResultExecutedContext filterContext) { var response = filterContext.HttpContext.Response; response.Filter = new OutputProcessorStream(response.Filter, Process); } } As you can see in the OnResultExecuted method, the response’s current Filter property is wrapped by a new stream implementation. Using this interceptor […] Read more...

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