CODEWITHSUNDEEP
.netasp.net-mvchttp-headers
Mike Flynn
Mike Flynn

Reputation: 24325

Get Header value of response in asp.net page with dashes

I know this is easy but I cant get this to work. I have a response header below.

X-Exposure-Server:EastUS2

I am spitting it out like this

<span>@Response.Headers["X-Exposure-Server"]</span>

However, it's blank. Why?

Response Headers

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Encoding: gzip
Vary: Accept-Encoding
Server: Microsoft-IIS/8.5
X-AspNetMvc-Version: 5.2
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
X-Exposure-Server: EastUS2
Access-Control-Allow-Origin: *
X-UA-Compatible: IE=Edge,chrome=1
Date: Tue, 19 Apr 2016 04:39:53 GMT
Content-Length: 11017

Upvotes: 1

Views: 1387

Answers (3)

Mike Flynn
Mike Flynn

Reputation: 24325

The only way I got this to work was set this in the BeginRequest, EndRequest was after the page was rendered.

protected void Application_BeginRequest()
        {
            HttpContext.Current.Response.AddHeader("X-Exposure-Server", Config.Settings.ServerRegion);
        }

Upvotes: 1

Karthik M R
Karthik M R

Reputation: 990

The key is accessible only if its set through code.So check this approach create a class which inherits IHttpModule and implement it.

public class HTTPHeaderModule : IHttpModule
{
    public void Dispose()
    {

    }

    public void Init(HttpApplication context)
    {
        context.EndRequest += new EventHandler(context_EndRequest);
    }

    void context_EndRequest(object sender, EventArgs e)
    {
        HttpResponse response = HttpContext.Current.Response;

        response.AddHeader("X-Exposure-Server","EastUS2e");
        //You can read this(EastUS2e) value from web.config
    }
}

Now add a line in web.config in the HttpModule section:

<httpModules>
    <add name="HTTPHeaderModule" , type="HTTPHeaderModule" />
 </httpModules>

MSDN ref:

http://msdn.microsoft.com/en-us/library/aa719858%28VS.71%29.aspx

Upvotes: 1

Karthik M R
Karthik M R

Reputation: 990

If you are adding custom header to response, then it is available.Just check the values of Response.Headers in quick watch.Tried your scenario.I added my response header Response.AddHeader("myheader", "myheadervalue"); and tried to consume it in view like - @Response.Headers["myheader"],it displayed the value.Only the headers added by mvc are displayed.

Upvotes: 1

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