Update Check Gitee

Source/GrasscutterTools/Utils/ReleaseAPI.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Net.Http.Headers;
+using System.Threading.Tasks;
+
+using Newtonsoft.Json;
+
+namespace GrasscutterTools.Utils
+{
+    internal class ReleaseAPI
+    {
+        public static async Task<ReleaseInfo> GetReleasesLastest(string username, string repo)
+        {
+            var headerValue = new ProductInfoHeaderValue("GrasscutterTools", "1");
+            try
+            {
+                HttpHelper.HttpClient.DefaultRequestHeaders.UserAgent.Add(headerValue);
+                return await HttpHelper.GetAsync<ReleaseInfo>($"https://api.github.com/repos/{username}/{repo}/releases/latest");
+            }
+            catch
+            {
+                // 如果Github无法访问，尝试从Gitee获取
+                var release = await HttpHelper.GetAsync<ReleaseInfo>($"https://gitee.com/api/v5/repos/{username}/{repo}/releases/latest");
+                release.Url = $"https://gitee.com/{username}/{repo}/releases";
+                return release;
+            }
+            finally
+            {
+                HttpHelper.HttpClient.DefaultRequestHeaders.UserAgent.Remove(headerValue);
+            }
+        }
+
+        public class ReleaseInfo
+        {
+            [JsonProperty("tag_name")]
+            public string TagName { get; set; }
+
+            [JsonProperty("html_url")]
+            public string Url { get; set; }
+
+            [JsonProperty("created_at")]
+            public DateTimeOffset CraeteTime { get; set; }
+
+            [JsonProperty("name")]
+            public string Name { get; set; }
+
+            [JsonProperty("body")]
+            public string Body { get; set; }
+        }
+    }
+}