How to read HTTP request headers in a WCF web service?

Question

In a WCF web service, how does one read an HTTP/HTTPS request header? In this case, i'm trying to determine the original URL host the client used. This might be in the X-Forwarded-Host header from a load balancer, or in the Host header if it's direct-box.

I've tried OperationContext.Current.IncomingMessageHeaders.FindHeader but i think this is looking at SOAP headers rather than HTTP headers.

So, how to read HTTP headers? Surely this is a simple question and i'm missing something obvious.

EDIT - @sinfere's answer was almost exactly what i needed. For completeness, here's what i ended up with:

IncomingWebRequestContext request = WebOperationContext.Current.IncomingRequest; WebHeaderCollection headers = request.Headers; string host = null; if (headers["X-Forwarded-Host"] != null) host = headers["X-Forwarded-Host"]; else if (headers["Host"] != null) host = headers["Host"]; else host = defaulthost; // set from a config value

While technically not a header, WCF disposes the content from the original HTTP Request so you will not be able to access the content of a Request inside your service. You can however, grab this before a service method is invoked inside a OperationsHandler — Itanex
– Itanex, Commented Sep 18, 2013 at 16:53

GGO · Accepted Answer · 2018-05-04 13:53:16Z

Try WebOperationContext.Current.IncomingRequest.Headers

I use following codes to see all headers :

IncomingWebRequestContext request = WebOperationContext.Current.IncomingRequest; WebHeaderCollection headers = request.Headers; Console.WriteLine("-------------------------------------------------------"); Console.WriteLine(request.Method + " " + request.UriTemplateMatch.RequestUri.AbsolutePath); foreach (string headerName in headers.AllKeys) { Console.WriteLine(headerName + ": " + headers[headerName]); } Console.WriteLine("-------------------------------------------------------");

Not all of this worked (the second Consol.WriteLine line) but the rest got me there. Thanks. +1

Slack Shot · Accepted Answer · 2014-01-16 00:47:42Z

This is how I read them in one of my Azure WCF web services.

IncomingWebRequestContext woc = WebOperationContext.Current.IncomingRequest; string applicationheader = woc.Headers["HeaderName"];

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