0.5.8

插件市场

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/AirAppMarketIndexService.cs

@@ -0,0 +1,77 @@
+using System.Net.Http.Headers;
+
+namespace LanMountainDesktop.PluginMarketplace;
+
+internal sealed class AirAppMarketIndexService : IDisposable
+{
+    private readonly AirAppMarketCacheService _cacheService;
+    private readonly HttpClient _httpClient;
+
+    public AirAppMarketIndexService(AirAppMarketCacheService cacheService)
+    {
+        _cacheService = cacheService;
+        _httpClient = new HttpClient
+        {
+            Timeout = TimeSpan.FromSeconds(20)
+        };
+        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LanMountainDesktop-PluginMarketplace/1.0");
+        _httpClient.DefaultRequestHeaders.Accept.Add(
+            new MediaTypeWithQualityHeaderValue("application/json"));
+    }
+
+    public async Task<AirAppMarketLoadResult> LoadAsync(CancellationToken cancellationToken = default)
+    {
+        Exception? networkError = null;
+
+        try
+        {
+            using var response = await _httpClient.GetAsync(
+                AirAppMarketDefaults.DefaultIndexUrl,
+                cancellationToken);
+            var json = await response.Content.ReadAsStringAsync(cancellationToken);
+            response.EnsureSuccessStatusCode();
+
+            var document = AirAppMarketIndexDocument.Load(json, AirAppMarketDefaults.DefaultIndexUrl);
+            _cacheService.SaveIndexJson(json);
+            return new AirAppMarketLoadResult(true, document, AirAppMarketLoadSource.Network, null, null);
+        }
+        catch (OperationCanceledException)
+        {
+            throw;
+        }
+        catch (Exception ex)
+        {
+            networkError = ex;
+        }
+
+        if (_cacheService.TryReadIndexJson(out var cachedJson))
+        {
+            try
+            {
+                var cachedDocument = AirAppMarketIndexDocument.Load(cachedJson, _cacheService.CacheFilePath);
+                return new AirAppMarketLoadResult(
+                    true,
+                    cachedDocument,
+                    AirAppMarketLoadSource.Cache,
+                    networkError?.Message,
+                    null);
+            }
+            catch (Exception cacheEx)
+            {
+                return new AirAppMarketLoadResult(
+                    false,
+                    null,
+                    null,
+                    null,
+                    $"{networkError?.Message ?? "Unknown network error"} | Cached index invalid: {cacheEx.Message}");
+            }
+        }
+
+        return new AirAppMarketLoadResult(false, null, null, null, networkError?.Message ?? "Unknown network error");
+    }
+
+    public void Dispose()
+    {
+        _httpClient.Dispose();
+    }
+}