Add local images support ...finally!

Bot/Modules/OttoLinux/PhotoServer.cs

@@ -0,0 +1,66 @@
+// This feature is not maintained anymore
+// it was exposing a webserver returning a json with all the questions and answers.
+// It was originally intended for a web version of the bot, but was never completed.
+
+using System.Net;
+
+namespace SoUnBot.Modules.OttoLinux
+{
+    public class PhotoServer
+    {
+        public PhotoServer(string baseDir)
+        {
+            using var listener = new HttpListener();
+            listener.Prefixes.Add("http://+:8001/");
+            listener.Start();
+            Console.WriteLine("PhotoServer is listening on port 8001...");
+
+            while (true)
+            {
+                HttpListenerContext ctx = listener.GetContext();
+                using HttpListenerResponse resp = ctx.Response;
+
+                resp.StatusCode = (int)HttpStatusCode.OK;
+                resp.StatusDescription = "Status OK";
+                resp.AddHeader("Access-Control-Allow-Origin", "*");
+                resp.AddHeader("Access-Control-Allow-Headers", "*");
+                resp.AddHeader("Access-Control-Allow-Methods", "GET");
+
+                if (ctx.Request.Url == null)
+                {
+                    resp.StatusCode = (int)HttpStatusCode.BadRequest;
+                    continue;
+                }
+
+                if (!File.Exists(baseDir + "/" + ctx.Request.Url.AbsolutePath))
+                {
+                    resp.StatusCode = (int)HttpStatusCode.NotFound;
+                    continue;
+                }
+
+                if (ctx.Request.Url.AbsolutePath.EndsWith("png"))
+                {
+                    resp.AddHeader("Content-Type", "image/png");
+                }
+                else if (ctx.Request.Url.AbsolutePath.EndsWith("jpg"))
+                {
+                    resp.AddHeader("Content-Type", "image/jpeg");
+                }
+                else
+                {
+                    resp.StatusCode = (int)HttpStatusCode.BadRequest;
+                    continue;
+                }
+
+                byte[] buffer = File.ReadAllBytes(baseDir + "/" + ctx.Request.Url.AbsolutePath);
+                resp.ContentLength64 = buffer.Length;
+
+                using Stream ros = resp.OutputStream;
+                try
+                {
+                    ros.Write(buffer, 0, buffer.Length);
+                } catch { }
+            }
+        }
+    }
+}