Fix crash when outputstream closes before response could be sent.

#227

Tranga/MangaConnectors/Mangasee.cs

@@ -61,21 +61,28 @@ public class Mangasee : MangaConnector
         }
     }
 
+    private readonly string[] _filterWords = {"a", "the", "of", "as", "to", "no", "for", "on", "with", "be", "and", "in", "wa", "at", "be", "ni"};
+    private string ToFilteredString(string input) => string.Join(' ', input.ToLower().Split(' ').Where(word => _filterWords.Contains(word)));
     private SearchResult[] FilteredResults(string publicationTitle, SearchResult[] unfilteredSearchResults)
     {
         Dictionary<SearchResult, int> similarity = new();
         foreach (SearchResult sr in unfilteredSearchResults)
         {
             List<int> scores = new();
-            foreach (string se in sr.a)
-                scores.Add(NeedlemanWunschStringUtil.CalculateSimilarity(se.ToLower(), publicationTitle.ToLower()));
-            scores.Add(NeedlemanWunschStringUtil.CalculateSimilarity(sr.s.ToLower(), publicationTitle.ToLower()));
+            string filteredPublicationString = ToFilteredString(publicationTitle);
+            string filteredSString = ToFilteredString(sr.s);
+            scores.Add(NeedlemanWunschStringUtil.CalculateSimilarity(filteredSString, filteredPublicationString));
+            foreach (string srA in sr.a)
+            {
+                string filteredAString = ToFilteredString(srA);
+                scores.Add(NeedlemanWunschStringUtil.CalculateSimilarity(filteredAString, filteredPublicationString));
+            }
             similarity.Add(sr, scores.Sum() / scores.Count);
         }
 
-        SearchResult[] similarity90 = similarity.Where(s => s.Value < 10).Select(s => s.Key).ToArray();
-
-        return similarity90;
+        List<SearchResult> ret = similarity.OrderBy(s => s.Value).Take(10).Select(s => s.Key).ToList();
+        ret.AddRange(similarity.Where(s => s.Value < 5).Select(s => s.Key));
+        return ret.ToArray();
     }
 
     public override Manga? GetMangaFromId(string publicationId)

Tranga/Server.cs

@@ -712,6 +712,10 @@ public class Server : GlobalBase
 
     private void SendResponse(HttpStatusCode statusCode, HttpListenerResponse response, object? content = null)
     {
+        if (response.OutputStream.CanWrite == false)
+        {
+            Log($"No response sent to request: Stream closed before response could be sent.");
+        }
         //Log($"Response: {statusCode} {content}");
         response.StatusCode = (int)statusCode;
         response.AddHeader("Access-Control-Allow-Headers", "Content-Type, Accept, X-Requested-With");
@@ -719,43 +723,43 @@ public class Server : GlobalBase
         response.AddHeader("Access-Control-Max-Age", "1728000");
         response.AppendHeader("Access-Control-Allow-Origin", "*");
 
-        if (content is not Stream)
+        try
         {
-            response.ContentType = "application/json";
-            try
+            if (content is not Stream)
             {
+                response.ContentType = "application/json";
                 response.OutputStream.Write(content is not null
                     ? Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(content))
                     : Array.Empty<byte>());
-                response.OutputStream.Close();
             }
-            catch (HttpListenerException e)
+            else if (content is FileStream stream)
             {
-                Log(e.ToString());
+                string contentType = stream.Name.Split('.')[^1];
+                switch (contentType.ToLower())
+                {
+                    case "gif":
+                        response.ContentType = "image/gif";
+                        break;
+                    case "png":
+                        response.ContentType = "image/png";
+                        break;
+                    case "jpg":
+                    case "jpeg":
+                        response.ContentType = "image/jpeg";
+                        break;
+                    case "log":
+                        response.ContentType = "text/plain";
+                        break;
+                }
+
+                stream.CopyTo(response.OutputStream);
+                stream.Close();
             }
-        }
-        else if(content is FileStream stream)
-        {
-            string contentType = stream.Name.Split('.')[^1];
-            switch (contentType.ToLower())
-            {
-                case "gif":
-                    response.ContentType = "image/gif";
-                    break;
-                case "png":
-                    response.ContentType = "image/png";
-                    break;
-                case "jpg":
-                case "jpeg":
-                    response.ContentType = "image/jpeg";
-                    break;
-                case "log":
-                    response.ContentType = "text/plain";
-                    break;
-            }
-            stream.CopyTo(response.OutputStream);
             response.OutputStream.Close();
-            stream.Close();
+        }
+        catch (HttpListenerException e)
+        {
+            Log(e.ToString());
         }
     }
 }