feat(POSTV1-02): 增加AI真实生成探测

2026-08-05 13:14:40 +08:00
parent 99fd3b1802
commit b1f143c238
6 changed files with 163 additions and 3 deletions
@@ -0,0 +1,74 @@
+using System.Diagnostics;
+using System.Text.Json;
+
+namespace Dada.Supervisor;
+
+internal static class AiGatewayProbe
+{
+    internal static async Task<int> RunAsync(ICredentialStore credentials, CancellationToken cancellationToken = default)
+    {
+        var node = Path.Combine(AppContext.BaseDirectory, "runtime", "node.exe");
+        var worker = Path.Combine(AppContext.BaseDirectory, "server", "worker.mjs");
+        if (!File.Exists(node) || !File.Exists(worker)) return WriteFailure("ai_probe_runtime_missing", 0);
+        var startInfo = new ProcessStartInfo(node) { WorkingDirectory = AppContext.BaseDirectory };
+        startInfo.Environment["DADA_SQLITE_NATIVE_BINDING"] = Path.Combine(AppContext.BaseDirectory, "server", "native", "better_sqlite3.node");
+        startInfo.ArgumentList.Add(worker);
+        startInfo.ArgumentList.Add("--dada-ai-probe");
+        startInfo.ArgumentList.Add("--dada-credential-stdin");
+        var result = await CredentialProcessLauncher.RunToCompletionAsync(startInfo, ChildRole.Worker, credentials, cancellationToken);
+        if (result.SensitiveOutputDetected || result.StandardError.Length > 0 || !TryValidateOutput(result.StandardOutput, out var sanitized))
+        {
+            return WriteFailure("ai_probe_runtime_failed", 0);
+        }
+        Console.WriteLine(sanitized);
+        return result.ExitCode;
+    }
+
+    internal static bool TryValidateOutput(string output, out string sanitized)
+    {
+        sanitized = string.Empty;
+        try
+        {
+            using var document = JsonDocument.Parse(output);
+            var root = document.RootElement;
+            if (root.ValueKind != JsonValueKind.Object) return false;
+            var allowed = new HashSet<string>(StringComparer.Ordinal)
+            {
+                "code", "error_category", "mime_type", "pixel_height", "pixel_width", "real_calls", "success",
+            };
+            if (root.EnumerateObject().Any(property => !allowed.Contains(property.Name))) return false;
+            if (!root.TryGetProperty("success", out var success) || success.ValueKind is not (JsonValueKind.True or JsonValueKind.False)) return false;
+            if (!root.TryGetProperty("real_calls", out var realCalls) || realCalls.ValueKind != JsonValueKind.Number || !realCalls.TryGetInt32(out var count) || count is < 0 or > 1) return false;
+            var passed = success.GetBoolean();
+            var code = root.GetProperty("code").GetString();
+            if (passed)
+            {
+                if (code != "ai_probe_passed" || count != 1) return false;
+                var mime = root.GetProperty("mime_type").GetString();
+                if (mime is not ("image/jpeg" or "image/png" or "image/webp")) return false;
+                if (!PositiveDimension(root, "pixel_width") || !PositiveDimension(root, "pixel_height")) return false;
+            }
+            else
+            {
+                if (code != "ai_probe_failed" || !root.TryGetProperty("error_category", out var category)
+                    || category.ValueKind != JsonValueKind.String || (category.GetString()?.Length ?? 0) is < 1 or > 64) return false;
+            }
+            sanitized = JsonSerializer.Serialize(root);
+            return true;
+        }
+        catch (Exception exception) when (exception is JsonException or InvalidOperationException or KeyNotFoundException)
+        {
+            return false;
+        }
+    }
+
+    private static bool PositiveDimension(JsonElement root, string name) =>
+        root.TryGetProperty(name, out var value) && value.ValueKind == JsonValueKind.Number
+        && value.TryGetInt32(out var dimension) && dimension is > 0 and <= 4096;
+
+    private static int WriteFailure(string code, int realCalls)
+    {
+        Console.WriteLine(JsonSerializer.Serialize(new { code, real_calls = realCalls, success = false }));
+        return 2;
+    }
+}