Add more cache-control headers to integrated webserver

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/web/FileRequestHandler.java

@@ -43,11 +43,9 @@
 public class FileRequestHandler implements HttpRequestHandler {
 
     private final Path webRoot;
-    private final File emptyTileFile;
 
     public FileRequestHandler(Path webRoot) {
         this.webRoot = webRoot.normalize();
-        this.emptyTileFile = webRoot.resolve("assets").resolve("emptyTile.json").toFile();
     }
 
     @Override
@@ -90,11 +88,6 @@ private HttpResponse generateResponse(HttpRequest request) {
             file = new File(filePath + "/index.html");
         }
 
-        // send empty tile-file if tile not exists
-        if (!file.exists() && file.toPath().startsWith(webRoot.resolve("maps"))){
-            file = emptyTileFile;
-        }
-
         if (!file.exists() || file.isDirectory()) {
             return new HttpResponse(HttpStatusCode.NOT_FOUND);
         }
@@ -135,7 +128,7 @@ private HttpResponse generateResponse(HttpRequest request) {
         response.addHeader("ETag", eTag);
         if (lastModified > 0) response.addHeader("Last-Modified", timestampToString(lastModified));
         response.addHeader("Cache-Control", "public");
-        response.addHeader("Cache-Control", "max-age=" + TimeUnit.HOURS.toSeconds(1));
+        response.addHeader("Cache-Control", "max-age=" + TimeUnit.DAYS.toSeconds(1));
 
         //add content type header
         String filetype = file.getName();

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/web/MapStorageRequestHandler.java

@@ -39,6 +39,7 @@
 
 import java.io.*;
 import java.util.*;
+import java.util.concurrent.TimeUnit;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -109,6 +110,9 @@ public HttpResponse handle(HttpRequest request) {
                     if (lastModified > 0)
                         response.addHeader("Last-Modified", timestampToString(lastModified));
 
+                    response.addHeader("Cache-Control", "public");
+                    response.addHeader("Cache-Control", "max-age=" + TimeUnit.DAYS.toSeconds(1));
+
                     if (lod == 0) response.addHeader("Content-Type", "application/octet-stream");
                     else response.addHeader("Content-Type", "image/png");
 
@@ -122,6 +126,8 @@ public HttpResponse handle(HttpRequest request) {
             if (optIn.isPresent()) {
                 CompressedInputStream compressedIn = new CompressedInputStream(optIn.get(), Compression.NONE);
                 HttpResponse response = new HttpResponse(HttpStatusCode.OK);
+                response.addHeader("Cache-Control", "public");
+                response.addHeader("Cache-Control", "max-age=" + TimeUnit.DAYS.toSeconds(1));
                 response.addHeader("Content-Type", ContentTypeRegistry.fromFileName(path));
                 writeToResponse(compressedIn, response, request);
                 return response;

BlueMapCommon/webapp/public/assets/emptyTile.json

@@ -1 +0,0 @@
-{}