Add SHA256 digest to cached file name

Fixes caching failure when URL is too long (e.g. discord hosted ones).
Fixes illegal characters on Windows (namely '\') that can show up in base64.

build.gradle

@@ -48,6 +48,7 @@ allprojects {
             compileAndTest 'org.apache.logging.log4j:log4j-core:2.20.0'
             compileAndTest 'org.apache.commons:commons-lang3:3.12.0'
             compileAndTest 'commons-io:commons-io:2.7' // NOTE: ask Forge to bump this on 1.16.5
+            compileAndTest 'commons-codec:commons-codec:1.16.1'
         }
 
         // Process target resources with mod info

src/main/java/me/srrapero720/watermedia/api/cache/CacheAPI.java

@@ -8,6 +8,9 @@
 
 import java.io.*;
 import java.nio.file.Files;
+import java.security.NoSuchAlgorithmException;
+import java.security.MessageDigest;
+import java.nio.charset.StandardCharsets;
 import java.util.Base64;
 import java.util.HashMap;
 import java.util.Map;
@@ -134,6 +137,13 @@ private static boolean updateIndex() {
     }
 
     static File entry$getFile(String url) {
-        return new File(dir, Base64.getEncoder().encodeToString(url.getBytes()));
+		try
+		{
+			MessageDigest digest = MessageDigest.getInstance("SHA-256");
+			return new File(dir, org.apache.commons.codec.binary.Hex.encodeHexString(digest.digest(url.getBytes(StandardCharsets.UTF_8))));
+		} catch (NoSuchAlgorithmException e) { LOGGER.error(IT, "Failed to initalize digest", e); }
+
+		// Fallback to old naming
+		return new File(dir, Base64.getEncoder().encodeToString(url.getBytes()));
     }
-}
+}