0.7.7.1

VoiceHubLanDesktop/VoiceHubApiService.cs

@@ -0,0 +1,102 @@
+using System.Net.Http;
+using System.Text.Json;
+
+namespace VoiceHubLanDesktop;
+
+/// <summary>
+/// VoiceHub API 服务
+/// </summary>
+public sealed class VoiceHubApiService : IDisposable
+{
+    private readonly HttpClient _httpClient;
+    private readonly JsonSerializerOptions _jsonOptions;
+
+    private const string DefaultApiUrl = "https://voicehub.lao-shui.top/api/songs/public";
+    private const int MaxRetryCount = 3;
+    private readonly TimeSpan _requestTimeout = TimeSpan.FromSeconds(10);
+
+    public VoiceHubApiService()
+    {
+        _httpClient = new HttpClient
+        {
+            Timeout = TimeSpan.FromSeconds(30)
+        };
+
+        _jsonOptions = new JsonSerializerOptions
+        {
+            PropertyNameCaseInsensitive = true,
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
+        };
+    }
+
+    public async Task<ApiResult<IReadOnlyList<SongItem>>> GetPublicScheduleAsync(
+        string? apiUrl = null,
+        CancellationToken cancellationToken = default)
+    {
+        var url = string.IsNullOrWhiteSpace(apiUrl) ? DefaultApiUrl : apiUrl.Trim();
+
+        for (var attempt = 0; attempt < MaxRetryCount; attempt++)
+        {
+            try
+            {
+                using var cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+                cts.CancelAfter(_requestTimeout);
+
+                var jsonResponse = await _httpClient.GetStringAsync(url, cts.Token);
+                var items = JsonSerializer.Deserialize<List<SongItem>>(jsonResponse, _jsonOptions);
+
+                if (items is null)
+                {
+                    return ApiResult<IReadOnlyList<SongItem>>.Failure("数据解析失败");
+                }
+
+                return ApiResult<IReadOnlyList<SongItem>>.Success(items);
+            }
+            catch (HttpRequestException ex)
+            {
+                if (attempt == MaxRetryCount - 1)
+                {
+                    return ApiResult<IReadOnlyList<SongItem>>.Failure($"网络错误: {ex.Message}");
+                }
+            }
+            catch (TaskCanceledException)
+            {
+                if (attempt == MaxRetryCount - 1)
+                {
+                    return ApiResult<IReadOnlyList<SongItem>>.Failure("请求超时");
+                }
+            }
+            catch (JsonException ex)
+            {
+                return ApiResult<IReadOnlyList<SongItem>>.Failure($"数据格式错误: {ex.Message}");
+            }
+            catch (Exception ex)
+            {
+                return ApiResult<IReadOnlyList<SongItem>>.Failure($"未知错误: {ex.Message}");
+            }
+
+            await Task.Delay(TimeSpan.FromSeconds(Math.Pow(2, attempt)), cancellationToken);
+        }
+
+        return ApiResult<IReadOnlyList<SongItem>>.Failure("获取数据失败");
+    }
+
+    public void Dispose() => _httpClient.Dispose();
+}
+
+public sealed class ApiResult<T>
+{
+    public bool IsSuccess { get; }
+    public T? Data { get; }
+    public string? ErrorMessage { get; }
+
+    private ApiResult(bool isSuccess, T? data, string? errorMessage)
+    {
+        IsSuccess = isSuccess;
+        Data = data;
+        ErrorMessage = errorMessage;
+    }
+
+    public static ApiResult<T> Success(T data) => new(true, data, null);
+    public static ApiResult<T> Failure(string errorMessage) => new(false, default, errorMessage);
+}