Support remote Geyser Bedrock pack URLs

README.md

@@ -40,7 +40,12 @@ sha1Url: "https://cdn.example.com/server-pack.zip.sha1"
 # Seconds between Java SHA-1 and Bedrock pack checks. Minimum: 30.
 refreshInterval: 300
 
-# Optional local Bedrock Edition pack for GeyserMC players. Accepts .mcpack or .zip.
+# Preferred: remote Bedrock pack URL for GeyserMC players.
+# Must be a direct .mcpack/.zip download with Content-Type: application/zip
+# and an exact Content-Length.
+bedrockResourcePackUrl: "https://example.com/packs/server-pack.mcpack"
+
+# Optional local alternative; use only when bedrockResourcePackUrl is blank.
 # Relative paths are resolved from plugins/RemotePackSync/.
 bedrockResourcePack: "bedrock/server-pack.mcpack"
 ```
@@ -67,11 +72,12 @@ The SHA-1 response must contain a 40-character hexadecimal SHA-1. Both of these
 
 ### Bedrock Edition through GeyserMC
 
-- Set `bedrockResourcePack` to a local `.mcpack` or `.zip` file. `.mcpack` is fully supported.
-- The source pack is checked asynchronously at `refreshInterval`. When its SHA-256 changes, RemotePackSync creates a managed copy under `plugins/RemotePackSync/bedrock-managed/`.
-- The managed copy receives a deterministic new header UUID derived from the updated source SHA-256. This makes Bedrock clients treat a changed pack as a new pack, while Geyser calculates and supplies the required final pack hash and size.
-- The original configured pack is never modified.
-- Every new Geyser Bedrock connection receives the latest successfully processed pack through Geyser's public `SessionLoadResourcePacksEvent` API.
+- Preferred remote mode: set `bedrockResourcePackUrl` to a direct `.mcpack` or `.zip` download URL. RemotePackSync creates a Geyser `UrlPackCodec` and registers it through the public `SessionLoadResourcePacksEvent` API, so Geyser supplies the URL to connecting Bedrock clients.
+- The remote server must return `Content-Type: application/zip` and an exact `Content-Length`. Redirects are allowed only when they ultimately resolve to a valid direct download. The URL should be stable and should expose a changed ETag or URL when the pack changes.
+- Geyser validates/downloads remote URL packs during its lifecycle. Use `/remotepacksync reload` after changing the URL or after replacing a pack at the same URL; players already connected must reconnect.
+- Local alternative: set `bedrockResourcePack` to a `.mcpack` or `.zip` file. The source is checked asynchronously at `refreshInterval`; changes receive a deterministic manifest UUID and are managed under `plugins/RemotePackSync/bedrock-managed/`.
+- The original configured local pack is never modified.
+- Every new Geyser Bedrock connection receives the latest successfully registered pack.
 - The pack must be a valid Bedrock pack containing `manifest.json` at the archive root. Geyser does **not** convert Java packs into Bedrock packs.
 - Bedrock's protocol only negotiates packs while a client connects. Players already connected when the file changes must reconnect to receive the new version; RemotePackSync cannot hot-push a replacement to an active Bedrock session.
 - If Geyser is absent, Java Edition resource-pack operation continues normally and Bedrock delivery stays disabled.
@@ -83,7 +89,7 @@ The SHA-1 response must contain a 40-character hexadecimal SHA-1. Both of these
 
 ## Compatibility
 
-RemotePackSync compiles against `org.spigotmc:spigot-api:26.2-R0.1-SNAPSHOT` and Geyser API `2.11.0-SNAPSHOT`, targeting Java 25 as required by Minecraft/Spigot 26.2. Java packs are sent through Bukkit's stable `Player#setResourcePack(String, byte[])` API; Bedrock packs use Geyser's public pack/session API. Geyser is a soft dependency, so Java-only servers remain supported.
+RemotePackSync compiles against `org.spigotmc:spigot-api:26.2-R0.1-SNAPSHOT` and Geyser API `2.11.0-SNAPSHOT`, targeting Java 25 as required by Minecraft/Spigot 26.2. Java packs are sent through Bukkit's stable `Player#setResourcePack(String, byte[])` API; Bedrock packs use Geyser's public `UrlPackCodec`/pack-session API. Geyser is a soft dependency, so Java-only servers remain supported.
 
 ## License
 

src/main/java/io/github/lf1/remotepacksync/BedrockPackManager.java

@@ -57,10 +57,18 @@ public final class BedrockPackManager {
         }
 
         subscribeToGeyser();
-        refreshTask = Bukkit.getScheduler().runTaskTimerAsynchronously(
-                plugin, this::refreshPack, 0L, newSettings.refreshIntervalTicks());
-        plugin.getLogger().info("Bedrock resource-pack refresh enabled every "
-                + (newSettings.refreshIntervalTicks() / 20L) + " seconds.");
+        if (newSettings.isRemote()) {
+            // Geyser's URL codec validates the remote download and obtains its metadata.
+            // Geyser itself downloads remote packs once during its lifecycle, so do not
+            // repeatedly recreate the URL codec on a timer.
+            refreshTask = Bukkit.getScheduler().runTaskAsynchronously(plugin, this::refreshPack);
+            plugin.getLogger().info("Bedrock remote resource-pack URL configured. Geyser will fetch it for new connections.");
+        } else {
+            refreshTask = Bukkit.getScheduler().runTaskTimerAsynchronously(
+                    plugin, this::refreshPack, 0L, newSettings.refreshIntervalTicks());
+            plugin.getLogger().info("Bedrock local resource-pack refresh enabled every "
+                    + (newSettings.refreshIntervalTicks() / 20L) + " seconds.");
+        }
     }
 
     public void stop() {
@@ -111,6 +119,17 @@ public final class BedrockPackManager {
         }
 
         try {
+            if (activeSettings.isRemote()) {
+                ResourcePack resourcePack = ResourcePack.create(PackCodec.url(activeSettings.remoteUrl()));
+                if (activeSettings != settings) {
+                    return;
+                }
+                currentPack.set(new Snapshot(null, resourcePack));
+                plugin.getLogger().info("Bedrock remote resource-pack URL validated and registered: "
+                        + activeSettings.remoteUrl());
+                return;
+            }
+
             Path source = activeSettings.sourceFile();
             if (!Files.isRegularFile(source)) {
                 throw new IOException("Configured Bedrock pack does not exist or is not a regular file: " + source);

src/main/java/io/github/lf1/remotepacksync/BedrockPackSettings.java

@@ -6,30 +6,46 @@ import java.nio.file.Path;
 import java.util.Locale;
 import java.util.Optional;
 
-/** Validated configuration for an optional local Bedrock resource pack. */
-public record BedrockPackSettings(Path sourceFile, long refreshIntervalTicks) {
+/** Validated configuration for an optional local or remote Bedrock resource pack. */
+public record BedrockPackSettings(Path sourceFile, String remoteUrl, long refreshIntervalTicks) {
     private static final long MINIMUM_REFRESH_SECONDS = 30L;
 
     public static Optional<BedrockPackSettings> from(FileConfiguration config, Path dataDirectory) {
+        String configuredUrl = config.getString("bedrockResourcePackUrl", "").trim();
         String configuredPath = config.getString("bedrockResourcePack", "").trim();
-        if (configuredPath.isEmpty()) {
+        if (!configuredUrl.isEmpty() && !configuredPath.isEmpty()) {
+            throw new IllegalArgumentException("Configure only one of bedrockResourcePackUrl or bedrockResourcePack.");
+        }
+        if (configuredUrl.isEmpty() && configuredPath.isEmpty()) {
             return Optional.empty();
         }
 
-        Path source = Path.of(configuredPath);
-        if (!source.isAbsolute()) {
-            source = dataDirectory.resolve(source);
+        Path source = null;
+        if (!configuredPath.isEmpty()) {
+            source = Path.of(configuredPath);
+            if (!source.isAbsolute()) {
+                source = dataDirectory.resolve(source);
+            }
+            source = source.normalize();
+            String fileName = source.getFileName().toString().toLowerCase(Locale.ROOT);
+            if (!fileName.endsWith(".mcpack") && !fileName.endsWith(".zip")) {
+                throw new IllegalArgumentException("bedrockResourcePack must reference a .mcpack or .zip file.");
+            }
+        } else {
+            if (!configuredUrl.startsWith("https://") && !configuredUrl.startsWith("http://")) {
+                throw new IllegalArgumentException("bedrockResourcePackUrl must be an HTTP(S) direct download URL.");
+            }
         }
-        source = source.normalize();
 
-        String fileName = source.getFileName().toString().toLowerCase(Locale.ROOT);
-        if (!fileName.endsWith(".mcpack") && !fileName.endsWith(".zip")) {
-            throw new IllegalArgumentException("bedrockResourcePack must reference a .mcpack or .zip file.");
-        }
         long refreshSeconds = config.getLong("refreshInterval", 300L);
         if (refreshSeconds < MINIMUM_REFRESH_SECONDS) {
             throw new IllegalArgumentException("refreshInterval must be at least " + MINIMUM_REFRESH_SECONDS + " seconds.");
         }
-        return Optional.of(new BedrockPackSettings(source, Math.multiplyExact(refreshSeconds, 20L)));
+        return Optional.of(new BedrockPackSettings(source, configuredUrl.isEmpty() ? null : configuredUrl,
+                Math.multiplyExact(refreshSeconds, 20L)));
+    }
+
+    public boolean isRemote() {
+        return remoteUrl != null;
     }
 }

src/main/java/io/github/lf1/remotepacksync/RemotePackSyncPlugin.java

@@ -23,6 +23,7 @@ public final class RemotePackSyncPlugin extends JavaPlugin implements Listener,
     @Override
     public void onEnable() {
         saveDefaultConfig();
+        getConfig().addDefault("bedrockResourcePackUrl", "");
         getConfig().addDefault("bedrockResourcePack", "");
         getConfig().options().copyDefaults(true);
         saveConfig();

src/main/resources/config.yml

@@ -9,7 +9,12 @@ sha1Url: ""
 # Seconds between remote SHA-1 and local Bedrock pack checks. Minimum: 30 seconds.
 refreshInterval: 300
 
-# Optional local Bedrock Edition resource pack for players joining through GeyserMC.
-# The path may point to a .mcpack or .zip file. Relative paths are resolved from
-# plugins/RemotePackSync/. Leave blank to disable Bedrock pack delivery.
+# Optional remote Bedrock Edition resource-pack URL for players connecting through GeyserMC.
+# This must be a direct HTTP(S) download URL to a .mcpack or .zip pack. The server
+# must return Content-Type: application/zip and an exact Content-Length.
+# Geyser passes this URL to Bedrock clients using its URL pack codec.
+bedrockResourcePackUrl: ""
+
+# Optional local alternative. Configure this only when bedrockResourcePackUrl is blank.
+# Relative paths are resolved from plugins/RemotePackSync/.
 bedrockResourcePack: ""