TestFunction.cs

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Azure.WebJobs.Host;
using Newtonsoft.Json;
using System.IO;

namespace RedisFunctionSample
{
    public static class TestFunction
    {
        [FunctionName("Test")]
        public static IActionResult Run(
            [HttpTrigger(AuthorizationLevel.Function, "GET", Route = "test")] HttpRequest req,
            TraceWriter log)
        {
            log.Info("C# HTTP trigger function processed a request.");

            string name = req.Query["name"];

            using (var reader = new StreamReader(req.Body))
            {
                string requestBody = reader.ReadToEnd();
                dynamic data = JsonConvert.DeserializeObject(requestBody);
                name = name ?? data?.name;
            }

            return name != null
                ? (ActionResult)new OkObjectResult($"Hello, {name}")
                : new BadRequestObjectResult("Please pass a name on the query string or in the request body");
        }
    }
}