Disable CRC check

- Disabled CRC and used it as a fallback if /cache isnt found

Author: gradwahl

src/main/java/jagex2/client/Client.java

@@ -1583,7 +1583,11 @@ public void load() {
 		}
 		try {
 			int var4 = 5;
-			this.jagChecksum[8] = 0;
+			if (this.loadLocalJagChecksums()) {
+				this.drawProgress("Using local cache", 20);
+			} else {
+				this.jagChecksum[8] = 0;
+			}
 			while (this.jagChecksum[8] == 0) {
 				this.drawProgress("Connecting to web server", 20);
 				try {
@@ -1939,6 +1943,26 @@ public void load() {
 		}
 	}
 
+	private boolean loadLocalJagChecksums() {
+		if (this.fileStreams[0] == null) {
+			return false;
+		}
+		int[] localChecksums = new int[9];
+		for (int archive = 0; archive < localChecksums.length; archive++) {
+			byte[] data = this.fileStreams[0].read(archive);
+			if (data == null) {
+				System.out.println("[Cache] Local archive " + archive + " missing; falling back to HTTP /crc");
+				return false;
+			}
+			this.crc32.reset();
+			this.crc32.update(data);
+			localChecksums[archive] = (int) this.crc32.getValue();
+		}
+		System.arraycopy(localChecksums, 0, this.jagChecksum, 0, localChecksums.length);
+		System.out.println("[Cache] Using local startup CRCs from cache folder");
+		return true;
+	}
+
 	@ObfuscatedName("client.b(B)V")
 	public void loop() {
 		if (this.errorStarted || this.errorLoading || this.errorHost) {