add an option to specify base url at build time

Author: myarichuk

Simple.HttpClientFactory.Tests/BasicClientBuilderTests.cs

@@ -69,6 +69,27 @@ public async Task Can_do_http_get_with_plain_client()
             Assert.Equal("Hello world!", await response.Content.ReadAsStringAsync());
         }
 
+        [Fact]
+        public async Task Can_do_http_get_with_plain_client_with_base_url()
+        {
+            var client = HttpClientFactory.Create(new Uri(_server.Urls[0])).Build();
+            var response = await client.GetAsync("/hello/world");
+            
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Equal("Hello world!", await response.Content.ReadAsStringAsync());
+        }
+
+        [Fact]
+        public async Task Can_do_http_get_with_plain_client_with_base_url_alternative_syntax()
+        {
+            var client = HttpClientFactory.Create().WithBaseUrl(new Uri(_server.Urls[0])).Build();
+            var response = await client.GetAsync("/hello/world");
+            
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Equal("Hello world!", await response.Content.ReadAsStringAsync());
+        }
+
+
         [Fact]
         public async Task Can_do_http_post_with_plain_client()
         {

Simple.HttpClientFactory/HttpClientBuilder.cs

@@ -15,6 +15,7 @@ namespace Simple.HttpClientFactory
     internal class HttpClientBuilder : IHttpClientBuilder
     {        
         private TimeSpan? _timeout;
+        private Uri _baseUrl;
         private readonly List<X509Certificate2> _certificates = new List<X509Certificate2>();
         private readonly List<IAsyncPolicy<HttpResponseMessage>> _policies = new List<IAsyncPolicy<HttpResponseMessage>>();
         private readonly List<DelegatingHandler> _middlewareHandlers = new List<DelegatingHandler>();
@@ -29,6 +30,12 @@ public IHttpClientBuilder WithDefaultHeader(string name, string value)
             return this;
         }
 
+        public IHttpClientBuilder WithBaseUrl(Uri baserUrl)
+        {
+            _baseUrl = new Uri(baserUrl.ToString());
+            return this;
+        }
+
         public IHttpClientBuilder WithDefaultHeaders(IReadOnlyDictionary<string, string> headers)
         {
             foreach(var kvp in headers)
@@ -258,6 +265,9 @@ HttpClient InitializeClientOnlyWithMiddleware()
             else
                 createdClient = new HttpClient(clientHandler, true);
 
+            if(_baseUrl != null)
+                createdClient.BaseAddress = _baseUrl;
+
             return createdClient;
         }
     }

Simple.HttpClientFactory/HttpClientFactory.cs

@@ -1,4 +1,5 @@
-using System.Net.Http;
+using System;
+using System.Net.Http;
 
 namespace Simple.HttpClientFactory
 {
@@ -18,5 +19,14 @@ public static class HttpClientFactory
         /// <returns></returns>
         public static IHttpClientBuilder Create(params DelegatingHandler[] handlers) =>
             new HttpClientBuilder().WithMessageHandlers(handlers);
+
+        /// <summary>
+        /// Create HttpClient builder with initial message processing pipeline
+        /// </summary>
+        /// <param name="baseUrl">Base url to use in the client</param>
+        /// <param name="handlers">Http message handlers to chain into HttpClient's processing pipeline</param>
+        /// <returns></returns>
+        public static IHttpClientBuilder Create(Uri baseUrl, params DelegatingHandler[] handlers) =>
+            new HttpClientBuilder().WithMessageHandlers(handlers).WithBaseUrl(baseUrl);
     }
 }

Simple.HttpClientFactory/IHttpClientBuilder.cs

@@ -8,6 +8,11 @@ namespace Simple.HttpClientFactory
 {
     public interface IHttpClientBuilder
     {
+        /// <summary>
+        /// Specify base url to use in the client
+        /// </summary>
+        IHttpClientBuilder WithBaseUrl(Uri baserUrl);
+
         /// <summary>
         /// Add default headers to be added to each request
         /// </summary>