Update readme.md

readme.md

@@ -26,6 +26,33 @@ Good job. You're done.
 [**Download it NOW!**](https://github.com/dhkim0800/indexextract/releases/download/18.06e0/indexextract.exe).
 
 ## Known issues
+
 You have to install Minecraft, or you will meet **unhandled exceptions!**
 
 Issue 2. In fact, Java is much faster in json processing with Gson. (I couldn't find JSON api. If you find it, Please contact to [email protected], [email protected], or Issues page in this project(recommended). AND I DON'T KNOW ASYNC PROGRAMMING WITH VB WELL AND I CANNOT CHANGE CODE WITH JSON API.
+
+## Get index from server
+
+Versions json file: https://launchermeta.mojang.com/mc/game/version_manifest.json
+
+Format json file: https://jsonformatter.curiousconcept.com/
+
+Assets json URL: {version}.json=>assetIndex=>url
+
+Looks like this:
+
+{
+
+  "objects": {
+
+    "realms/lang/de_DE.lang": {
+
+      "hash": "10a54fc66c8f479bb65c8d39c3b62265ac82e742",
+      
+      "size": 8112
+      
+    }
+
+  }
+
+}