Add support for Basic Auth to ConsulHealthCheck

src/HealthChecks.Consul/ConsulHealthCheck.cs

@@ -1,6 +1,7 @@
 using Microsoft.Extensions.Diagnostics.HealthChecks;
 using System;
 using System.Net.Http;
+using System.Net.Http.Headers;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -19,7 +20,14 @@ public async Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context
         {
             try
             {
-                var result = await _httpClientFactory()
+                var client = _httpClientFactory();
+
+                if (_options.RequireBasicAuthentication) {
+                    var authHeaderValue = Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(string.Format("{0}:{1}", _options.Username, _options.Password)));
+                    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", authHeaderValue);
+                }
+
+                var result = await client
                     .GetAsync($"{(_options.RequireHttps ? "https" : "http")}://{_options.HostName}:{_options.Port}/v1/status/leader", cancellationToken);
 
                 return result.IsSuccessStatusCode ? HealthCheckResult.Healthy() : new HealthCheckResult(context.Registration.FailureStatus, description: "Consul response was not a successful HTTP status code");

src/HealthChecks.Consul/ConsulOptions.cs

@@ -7,5 +7,11 @@ public class ConsulOptions
         public int Port { get; set; }
 
         public bool RequireHttps { get; set; }
+
+        public bool RequireBasicAuthentication { get; set; }
+
+        public string Username { get; set; }
+
+        public string Password { get; set; }
     }
 }