Fix TemplaterServer example for .NET

File detection should be case insensitive, as otherwise it only works on Windows.
Cache files at startup instead of probing them later... as that takes care of potential file access security problems.

Author: zapov

Advanced/TemplaterServer/src/Startup.cs

@@ -22,7 +22,7 @@ public void ConfigureServices(IServiceCollection services)
                      policy =>
                      {
                          policy
-                         .WithOrigins("http://localhost:3000", "http://localhost:3001")
+                         .WithOrigins("http://localhost:5000", "http://localhost:5001")
                          .AllowAnyHeader()
                          .AllowAnyMethod();
                      });

Advanced/TemplaterServer/src/TemplaterController.cs

@@ -29,10 +29,17 @@ static TemplaterController()
 		}
 
 		private readonly SharedResource SharedResource;
+		private readonly Dictionary<string, FileInfo> ResourceFiles = new Dictionary<string, FileInfo>();
 
 		public TemplaterController(SharedResource sharedResource)
 		{
 			this.SharedResource = sharedResource;
+			var resourcesPath = new DirectoryInfo("resources");
+			foreach(var d in resourcesPath.GetDirectories())
+			{
+				foreach (var f in d.GetFiles())
+					ResourceFiles[d.Name.ToLowerInvariant() + "/" + f.Name.ToLowerInvariant()] = f;
+			}
 		}
 
 		static object JavaFormat(object value, string metadata)
@@ -74,36 +81,41 @@ public IActionResult Nested([FromQuery]string template)
 		[HttpGet("static/{file}")]
 		public IActionResult Static(string file)
 		{
-			var fi = new FileInfo("resources/static/" + file);
-			if (!fi.Exists) return NotFound();
+			var name = "static/" + file.ToLowerInvariant().Trim();
+			FileInfo fi;
+			if (!ResourceFiles.TryGetValue(name, out fi) || !fi.Exists) return NotFound();
 			return PhysicalFile(fi.FullName, file.EndsWith(".css") ? "text/css" : "application/javascript");
 		}
 
 		[HttpGet("js/{file}")]
 		public IActionResult JS(string file)
-		{
-			var fi = new FileInfo("resources/js/" + file);
-			if (!fi.Exists) return NotFound();
+		{
+
+			var name = "js/" + file.ToLowerInvariant().Trim();
+			FileInfo fi;
+			if (!ResourceFiles.TryGetValue(name, out fi) || !fi.Exists) return NotFound();
 			return PhysicalFile(fi.FullName, "application/javascript");
 		}
 
 		[HttpGet("examples/{file}")]
 		public IActionResult Examples(string file)
-		{
-			var fi = new FileInfo("resources/examples/" + file);
-			if (!fi.Exists) return NotFound();
+		{
+			var name = "examples/" + file.ToLowerInvariant().Trim();
+			FileInfo fi;
+			if (!ResourceFiles.TryGetValue(name, out fi) || !fi.Exists) return NotFound();
 			return PhysicalFile(fi.FullName, "text/json");
 		}
 
 		[HttpGet("templates/{file}")]
 		public IActionResult Templates(string file, [FromQuery] string withSchema)
-		{
-			var fi = new FileInfo("resources/templates/" + file);
-			if (!fi.Exists) return NotFound();
+		{
+			var templateName = "templates/" + file.ToLowerInvariant().Trim();
+			var jsonName = "examples/" + file.ToLowerInvariant().Trim() + ".json";
+			FileInfo fi, jfi;
+			if (!ResourceFiles.TryGetValue(templateName, out fi) || !fi.Exists) return NotFound();
+			if (!ResourceFiles.TryGetValue(jsonName, out jfi) || !jfi.Exists) return NotFound();
 			if ("true".Equals(withSchema, StringComparison.OrdinalIgnoreCase)) 
 			{
-				var jfi = new FileInfo("resources/examples/" + file + ".json");
-				if (!jfi.Exists) return NotFound();
 				string jsonString = System.IO.File.ReadAllText(jfi.FullName);
 				MemoryStream ms;
 				try 
@@ -163,9 +175,10 @@ private MemoryStream Process(FileInfo fi, string argument, bool asSchema, bool d
 		[HttpPost("process")]
         public IActionResult Post(Argument arg)
         {
-			if (arg == null) return NotFound();
-			var fi = new FileInfo("resources/templates/" + arg.template);
-			if (!fi.Exists) return NotFound();
+			if (arg == null || string.IsNullOrEmpty(arg.template)) return NotFound();
+			var name = "templates/" + arg.template.ToLowerInvariant().Trim();
+			FileInfo fi;
+			if (!ResourceFiles.TryGetValue(name, out fi) || !fi.Exists) return NotFound();
 			MemoryStream ms;
 			try
 			{