update utils

utils/redisCopy.js

@@ -19,7 +19,7 @@ async function copyChunks() {
   for (let x = 0; x < CHUNKS_XY; x++) {
     for (let y = 0; y < CHUNKS_XY; y++) {
       const oldkey = `chunk:${x}:${y}`;
-      const newkey = `ch:0:${i}:${j}`;
+      const newkey = `ch:0:${x}:${y}`;
       const chunk = await oldredis.getAsync(oldkey);
       if (chunk) {
         const setNXArgs = [newkey, chunk];

utils/redisUnprotect.js

@@ -0,0 +1,46 @@
+/* @flow */
+//this script just copies chunks from one redis to another with a different key as needed
+
+import redis from 'redis';
+import bluebird from 'bluebird';
+
+
+bluebird.promisifyAll(redis.RedisClient.prototype);
+bluebird.promisifyAll(redis.Multi.prototype);
+
+
+//ATTENTION Make suer to set the rdis URLs right!!!
+const url = "redis://localhost:6379";
+const redis = redis.createClient(url, { return_buffers: true });
+
+const CANVAS_SIZE = 256 * 256;
+const TILE_SIZE = 256;
+const CHUNKS_XY = CANVAS_SIZE / TILE_SIZE;
+
+async function moveProtection() {
+  for (let x = 0; x < CHUNKS_XY; x++) {
+    for (let y = 0; y < CHUNKS_XY; y++) {
+      const key = `ch:0:${x}:${y}`;
+      const chunk = await redis.getAsync(key);
+      if (chunk) {
+        const buffer = new Uint8Array(chunk);
+        let changed = false;
+        for (let u = 0; u < buffer.length; ++u) {
+          const bit = buffer[u];
+          if (bit & 0x20) {
+            // move protected bit from 0x20 to 0x80
+            buffer[u] = (bit & 0x1F) | 0x80;
+            changed = true;
+          }
+        }
+        if (changed) {
+          const setNXArgs = [key, Buffer.from(buffer.buffer).toString('binary')]
+          await redis.sendCommandAsync('SETNX', setNXArgs);
+          console.log("Changed Chunk ", key);
+        }
+      }
+    }
+  }
+}
+
+moveProtection();