implement GitHub resource pack auto-updater with HTTP server and configuration

2026-05-14 00:16:47 +02:00 · 2025-12-30 00:17:46 +01:00
parent 3305388f1c
commit e0dbca8d51
6 changed files with 432 additions and 5 deletions
--- a/src/main/java/ceratic/projectvollidioten/http/ResourcePackHttpServer.java
+++ b/src/main/java/ceratic/projectvollidioten/http/ResourcePackHttpServer.java
@@ -0,0 +1,101 @@
+package ceratic.projectvollidioten.http;
+
+import ceratic.projectvollidioten.config.GithubResourcePackConfig;
+
+import com.sun.net.httpserver.HttpExchange;
+import com.sun.net.httpserver.HttpHandler;
+import com.sun.net.httpserver.HttpServer;
+
+import net.minecraft.server.MinecraftServer;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public class ResourcePackHttpServer {
+    private final HttpServer server;
+    private final Path resourcePacksDir;
+    private final String expectedFileName;
+    private final int port;
+
+    public ResourcePackHttpServer(MinecraftServer mcServer, String expectedFileName, int port) throws IOException {
+        this.resourcePacksDir = mcServer.getRunDirectory().resolve("server-resource-packs");
+        this.expectedFileName = expectedFileName;
+        this.port = port;
+
+        Files.createDirectories(resourcePacksDir);
+
+        this.server = HttpServer.create(new InetSocketAddress("0.0.0.0", port), 0);
+        this.server.createContext("/resourcepacks", new ResourcePackHandler());
+        this.server.setExecutor(null); // Uses default executor
+    }
+
+    public void start() {
+        server.start();
+        System.out.println("[GithubRP] 🌐 HTTP server started on http://0.0.0.0:" + port + "/resourcepacks/");
+    }
+
+    public void stop() {
+        server.stop(1);
+        System.out.println("[GithubRP] 🌐 HTTP server stopped.");
+    }
+
+    // Returns URL clients should use — e.g. http://192.168.1.100:25585/resourcepacks/my-pack.zip
+    public String getPackUrl() {
+        // Try to get LAN IP (optional: replace with public IP if port-forwarded)
+        String host = "127.0.0.1"; // fallback
+        try {
+            java.net.InetAddress addr = java.net.InetAddress.getLocalHost();
+            if (!addr.isLoopbackAddress() && addr.isSiteLocalAddress()) {
+                host = addr.getHostAddress();
+            }
+        } catch (Exception ignored) {}
+
+        return String.format("http://%s:%d/resourcepacks/%s", host, port, expectedFileName);
+    }
+
+    private class ResourcePackHandler implements HttpHandler {
+        @Override
+        public void handle(HttpExchange exchange) throws IOException {
+            String path = exchange.getRequestURI().getPath();
+            String targetFile = path.substring("/resourcepacks/".length());
+
+            // Security: only allow configured pack filename
+            if (!targetFile.equals(expectedFileName)) {
+                sendResponse(exchange, 403, "Forbidden: unknown resource pack");
+                return;
+            }
+
+            Path packFile = resourcePacksDir.resolve(targetFile);
+            if (!Files.exists(packFile) || !Files.isRegularFile(packFile)) {
+                sendResponse(exchange, 404, "Resource pack not found");
+                return;
+            }
+
+            // Set headers
+            exchange.getResponseHeaders().set("Content-Type", "application/zip");
+            exchange.getResponseHeaders().set("Content-Length", String.valueOf(Files.size(packFile)));
+            exchange.getResponseHeaders().set("Cache-Control", "public, max-age=3600");
+            exchange.getResponseHeaders().set("Access-Control-Allow-Origin", "*");
+
+            // Send file
+            exchange.sendResponseHeaders(200, 0); // chunked
+            try (OutputStream os = exchange.getResponseBody();
+                 var fis = Files.newInputStream(packFile)) {
+                fis.transferTo(os);
+            } catch (IOException e) {
+                System.err.println("[GithubRP] Client disconnected during pack download.");
+            }
+        }
+
+        private void sendResponse(HttpExchange exchange, int code, String msg) throws IOException {
+            byte[] data = msg.getBytes(java.nio.charset.StandardCharsets.UTF_8);
+            exchange.getResponseHeaders().set("Content-Type", "text/plain; charset=utf-8");
+            exchange.sendResponseHeaders(code, data.length);
+            exchange.getResponseBody().write(data);
+            exchange.close();
+        }
+    }
+}