How to get client IP address in Azure Functions C#?

Question

I'm writing a function in C# using Azure Functions and need to get the ip address of the client that called the function, is this possible?

Answer 1

Here is an answer based on the one here.

#r "System.Web"

using System.Net;
using System.Web;

public static HttpResponseMessage Run(HttpRequestMessage req, TraceWriter log)
{
    string clientIP = ((HttpContextWrapper)req.Properties["MS_HttpContext"]).Request.UserHostAddress;
    return req.CreateResponse(HttpStatusCode.OK, $"The client IP is {clientIP}");
}