fixed many bugs in parser

ParadoxSaveParser.WebAPI/Program.cs

@@ -1,5 +1,7 @@
 global using System;
 global using System.IO;
+global using System.Collections.Generic;
+global using System.Text;
 global using System.Text.Json;
 global using System.Threading.Tasks;
 global using DTLib.Demystifier;
@@ -7,7 +9,7 @@ global using ParadoxSaveParser.Lib;
 using System.Collections.Concurrent;
 using System.IO.Compression;
 using System.Linq;
-using System.Text;
+using System.Text.Encodings.Web;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
@@ -18,7 +20,14 @@ public class Program
 {
     private static ConcurrentDictionary<string, SaveFileMetadata> _saveMetadataStorage = new();
     private static WebApplication _app = null!;
-    
+
+    private static JsonSerializerOptions _saveSerializerOptions = new()
+    {
+        WriteIndented = false,
+        Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
+        MaxDepth = 1024,
+    };
+
     public static void Main(string[] args)
     {
         var builder = WebApplication.CreateBuilder(args);
@@ -116,31 +125,25 @@ public class Program
         
         try
         {
-            if(meta.status != SaveFileProcessingStatus.Uploaded)
+            if (meta.status != SaveFileProcessingStatus.Uploaded)
                 throw new Exception($"Invalid save processing status: {meta.status}");
-            
+
             using var zipArchive = ZipFile.Open(PathHelper.GetSaveFilePath(meta.id), ZipArchiveMode.Read);
             var zipEntry = zipArchive.Entries.FirstOrDefault(e => e.Name == "gamestate");
-            if(zipEntry is null)
+            if (zipEntry is null)
                 throw new Exception("Invalid save format: no gamestate file found");
             string extractedGamestatePath = PathHelper.GetSaveFilePath(meta.id) + ".gamestate";
             zipEntry.ExtractToFile(extractedGamestatePath);
             var gamestateStream = File.Open(extractedGamestatePath, FileMode.Open, FileAccess.Read);
-            
+
             meta.status = SaveFileProcessingStatus.Parsing;
-            string expectedHeader = "EU4txt";
-            byte[] headBytes = new byte[expectedHeader.Length];
-            gamestateStream.ReadExactly(headBytes);
-            string headStr = Encoding.UTF8.GetString(headBytes);
-            if(headStr != expectedHeader)
-                throw new Exception($"Invalid gamestate header: '{headStr}'");
             var parser = new Parser(gamestateStream);
             var result = parser.Parse();
-            
+
             meta.status = SaveFileProcessingStatus.SavingResults;
             string resultFilePath = PathHelper.GetParsedSaveFilePath(meta.id);
             await using var resultFile = File.Open(resultFilePath, FileMode.CreateNew, FileAccess.Write);
-            await JsonSerializer.SerializeAsync(resultFile, result);
+            await JsonSerializer.SerializeAsync(resultFile, result, _saveSerializerOptions);
             meta.status = SaveFileProcessingStatus.Done;
             meta.SaveToFile();
         }
@@ -152,7 +155,8 @@ public class Program
             httpContext.Response.StatusCode = StatusCodes.Status500InternalServerError;
             _app.Logger.Log(LogLevel.Error, "ParseSaveEU4 Error: {errorMesage}", errorMesage);
         }
-        
+
+        GC.Collect();
         await httpContext.Response.WriteAsJsonAsync(meta);
     }
 }