feat(delmia-notifier): HttpClient recipe sender with connect-failure classification

2026-06-26 05:15:17 -04:00
parent d26462ed8d
commit 71f680d542
2 changed files with 120 additions and 0 deletions
@@ -0,0 +1,58 @@
+using System.Text;
+using System.Text.Json;
+
+namespace ZB.MOM.WW.ScadaBridge.DelmiaNotifier;
+
+/// <summary>
+/// <see cref="IRecipeSender"/> over a real <see cref="HttpClient"/>: POSTs the recipe payload to
+/// <c>{baseUrl}/api/DelmiaRecipeDownload</c> with the <c>X-API-Key</c> header. A reachable server
+/// (any status) is <see cref="AttemptKind.Connected"/>; a connection/timeout failure is <see cref="AttemptKind.ConnectFailed"/>.
+/// </summary>
+internal sealed class HttpRecipeSender(HttpClient http, string apiKey) : IRecipeSender
+{
+    private const string MethodPath = "/api/DelmiaRecipeDownload";
+
+    public async Task<AttemptOutcome> SendAsync(string baseUrl, RecipeDownload payload, CancellationToken ct)
+    {
+        var url = baseUrl.TrimEnd('/') + MethodPath;
+        try
+        {
+            using var request = new HttpRequestMessage(HttpMethod.Post, url);
+            request.Headers.TryAddWithoutValidation("X-API-Key", apiKey);
+            var json = JsonSerializer.Serialize(payload, NotifierJsonContext.Default.RecipeDownload);
+            request.Content = new StringContent(json, Encoding.UTF8, "application/json");
+
+            using var response = await http.SendAsync(request, ct);
+            var status = (int)response.StatusCode;
+            RecipeDownloadResult? body = null;
+            if (response.IsSuccessStatusCode)
+            {
+                var responseText = await response.Content.ReadAsStringAsync(ct);
+                body = TryParse(responseText);
+            }
+
+            return new AttemptOutcome(AttemptKind.Connected, status, body, null);
+        }
+        catch (HttpRequestException ex)
+        {
+            return new AttemptOutcome(AttemptKind.ConnectFailed, 0, null, ex.Message);
+        }
+        catch (OperationCanceledException ex) when (!ct.IsCancellationRequested)
+        {
+            // No external cancellation requested → this is an HttpClient.Timeout, i.e. the node never answered.
+            return new AttemptOutcome(AttemptKind.ConnectFailed, 0, null, "timeout: " + ex.Message);
+        }
+    }
+
+    private static RecipeDownloadResult? TryParse(string responseText)
+    {
+        try
+        {
+            return JsonSerializer.Deserialize(responseText, NotifierJsonContext.Default.RecipeDownloadResult);
+        }
+        catch (JsonException)
+        {
+            return null; // unparseable body on a 2xx → treated as failure by the loop
+        }
+    }
+}