Added a prompt injection detection (#857)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/Services/RustService.Security.cs

@@ -0,0 +1,49 @@
+using AIStudio.Tools.Rust;
+
+namespace AIStudio.Tools.Services;
+
+public sealed partial class RustService
+{
+    /// <summary>
+    /// How long one sanitize request may take.
+    /// </summary>
+    /// <remarks>
+    /// Web pages and retrieval contexts are small, so this only exists to keep a stuck runtime
+    /// from blocking the caller forever.
+    /// </remarks>
+    private static readonly TimeSpan SANITIZE_TIMEOUT = TimeSpan.FromSeconds(30);
+
+    /// <summary>
+    /// Asks the runtime to filter prompt injections out of a text.
+    /// </summary>
+    /// <remarks>
+    /// File content does not go through here: the runtime filters it while it streams the file.
+    /// This is the path for content the app fetched itself, i.e. web pages and retrieval contexts.
+    /// </remarks>
+    /// <param name="text">The content to filter.</param>
+    /// <returns>The filtered content and what was found or null when the runtime could not be reached.</returns>
+    public async Task<SanitizePromptInjectionsResponse?> SanitizePromptInjections(string text)
+    {
+        try
+        {
+            using var timeoutTokenSource = new CancellationTokenSource(SANITIZE_TIMEOUT);
+            using var response = await this.http.PostAsJsonAsync(
+                "/security/prompt-injection/sanitize",
+                new SanitizePromptInjectionsRequest(text),
+                cancellationToken: timeoutTokenSource.Token);
+
+            if (!response.IsSuccessStatusCode)
+            {
+                this.logger?.LogError("Failed to check a text for prompt injections. Status: {StatusCode}, reason: '{ReasonPhrase}'", response.StatusCode, response.ReasonPhrase);
+                return null;
+            }
+
+            return await response.Content.ReadFromJsonAsync<SanitizePromptInjectionsResponse>(timeoutTokenSource.Token);
+        }
+        catch (Exception exception)
+        {
+            this.logger?.LogError(exception, "Failed to check a text for prompt injections.");
+            return null;
+        }
+    }
+}