1 files changed, 73 insertions, 0 deletions
diff --git a/src/SMAPI/Framework/WebApiClient.cs b/src/SMAPI/Framework/WebApiClient.cs
new file mode 100644
index 00000000..f3c7de28
--- /dev/null
+++ b/src/SMAPI/Framework/WebApiClient.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using Newtonsoft.Json;
+using StardewModdingAPI.Models;
+
+namespace StardewModdingAPI.Framework
+{
+    /// <summary>Provides methods for interacting with the SMAPI web API.</summary>
+    internal class WebApiClient
+    {
+        /*********
+        ** Properties
+        *********/
+        /// <summary>The base URL for the web API.</summary>
+        private readonly Uri BaseUrl;
+
+        /// <summary>The API version number.</summary>
+        private readonly ISemanticVersion Version;
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="baseUrl">The base URL for the web API.</param>
+        /// <param name="version">The web API version.</param>
+        public WebApiClient(string baseUrl, ISemanticVersion version)
+        {
+#if !SMAPI_FOR_WINDOWS
+            baseUrl = baseUrl.Replace("https://", "http://"); // workaround for OpenSSL issues with the game's bundled Mono on Linux/Mac
+#endif
+            this.BaseUrl = new Uri(baseUrl);
+            this.Version = version;
+        }
+
+        /// <summary>Get the latest SMAPI version.</summary>
+        /// <param name="modKeys">The mod keys for which to fetch the latest version.</param>
+        public IDictionary<string, ModInfoModel> GetModInfo(params string[] modKeys)
+        {
+            return this.Post<ModSearchModel, Dictionary<string, ModInfoModel>>(
+                $"v{this.Version}/mods",
+                new ModSearchModel(modKeys)
+            );
+        }
+
+
+        /*********
+        ** Private methods
+        *********/
+        /// <summary>Fetch the response from the backend API.</summary>
+        /// <typeparam name="TBody">The body content type.</typeparam>
+        /// <typeparam name="TResult">The expected response type.</typeparam>
+        /// <param name="url">The request URL, optionally excluding the base URL.</param>
+        /// <param name="content">The body content to post.</param>
+        private TResult Post<TBody, TResult>(string url, TBody content)
+        {
+            /***
+            ** Note: avoid HttpClient for Mac compatibility.
+            ***/
+            using (WebClient client = new WebClient())
+            {
+                Uri fullUrl = new Uri(this.BaseUrl, url);
+                string data = JsonConvert.SerializeObject(content);
+
+                client.Headers["Content-Type"] = "application/json";
+                client.Headers["User-Agent"] = $"SMAPI/{this.Version}";
+                string response = client.UploadString(fullUrl, data);
+                return JsonConvert.DeserializeObject<TResult>(response);
+            }
+        }
+    }
+}