minecraft | Minecraft web and utility scripts | Runtime Evironment library

I'm making plugin for Minecraft - 'Paper' exactly. And it uses JDA for Discord bot function.

The problem is, Minecraft(Paper) uses log4j as its logging library. JDA uses slf4j as its logging library. I want JDA to use log4j so that error message of JDA would be shown in console as plugin's error message. (See EDIT2 for actual logs)

No System.out.println() because Minecraft(Paper) will complain about using it.
No Logback because I think it is another logging library, thus it cannot work well with Minecraft(Paper)'s logging system (no JDA logs in Minecraft log etc.). I don't want to implement another logging library when there is already logging system provided by Minecraft, which is log4j.

JDA wiki only describes about Logback so I have to find my own way for making JDA with Minecraft's logging system, but it was no success.

For example:

I'm trying to make a Discord bot that just says if someone is online on the game.

However I keep getting this message:

[ERR_REQUIRE_ESM]: require() of ES Module from not supported. Instead change the require of index.js in... to a dynamic import() which is available in all CommonJS modules.

This is my code:

With regard to the Log4j JNDI remote code execution vulnerability that has been identified CVE-2021-44228 - (also see references) - I wondered if Log4j-v1.2 is also impacted, but the closest I got from source code review is the JMS-Appender.

The question is, while the posts on the Internet indicate that Log4j 1.2 is also vulnerable, I am not able to find the relevant source code for it.

Am I missing something that others have identified?

Log4j 1.2 appears to have a vulnerability in the socket-server class, but my understanding is that it needs to be enabled in the first place for it to be applicable and hence is not a passive threat unlike the JNDI-lookup vulnerability which the one identified appears to be.

Is my understanding - that Log4j v1.2 - is not vulnerable to the jndi-remote-code execution bug correct?

• Apache Log4j Security Vulnerabilities

• Zero-day in ubiquitous Log4j tool poses a grave threat to the Internet

• Worst Apache Log4j RCE Zero day Dropped on Internet

• ‘Log4Shell’ vulnerability poses critical threat to applications using ‘ubiquitous’ Java logging package Apache Log4j

This blog post from Cloudflare also indicates the same point as from AKX....that it was introduced from Log4j 2!

Update #1 - A fork of the (now-retired) apache-log4j-1.2.x with patch fixes for few vulnerabilities identified in the older library is now available (from the original log4j author). The site is https://reload4j.qos.ch/. As of 21-Jan-2022 version 1.2.18.2 has been released. Vulnerabilities addressed to date include those pertaining to JMSAppender, SocketServer and Chainsaw vulnerabilities. Note that I am simply relaying this information. Have not verified the fixes from my end. Please refer the link for additional details.

I am trying to build a plugin for a Minecraft Spigot server that ultimately I would like to be able to communicate over serial with things connected to my PC (server is running locally on the PC as well).

I have been able to build and run the plugin and manipulate player/blocks in the game so I know the build process for my base plugin is working. My trouble started when I began trying to include an extra dependency: jSerialComm

I added the dependency entry in my pom.xml file:

I currently have 3 subprojects in my Gradle project, structured like so:

In my Minecraft Forge mod for 1.7.10. I am aware that this version is arguably old news, but it is my favorite version and all of my modding experience is with this version.

I am creating a custom TNT block. The issue is the primed version is not rendering. When ignited, the TNT disappears, and then shortly later there is an explosion. If the TNT was placed in the air, the explosion is below like it should be due to the primed TNT falling. The issue is that it is not rendering. When I use fn+f3+b to show hitboxes, no hitbox is shown.

The issue is the entity being spawned on the server does not replicate to the client. I know this because:

• Switching out the entity renderer with the default RenderTNTPrimed still fails to render at all instead of rendering the default TNT hence my custom renderer class cannot be the issue.

• Switching out my custom entity class with the copy paste vanilla EntityTNTPrimed code also does not solve the problem. If the problem was with my custom entity class then using bona fide vanilla code would fix the problem but it doesnt.

• The entity and its renderer are being registered using RenderingRegistry.registerEntityRenderingHandler() from the client proxy and EntityRegistry.registerGlobalEntityID() then EntityRegistry.registerModEntity() in init() (I had tested the client proxy with System.out.println() and the client proxy works).

• Though the largest evidence of the problem being the TNT spawing on the server but not the client is the fact that removing if(world.isRemote) return; from the handlers in my BlockTNT class causes the TNT to render. However I am not supposed to handle igniting the TNT on the client so I am not supposed to have to remove if(world.isRemote) return;. Besides doing this is a pseudo fix, because the entity is still invisible when /summoned.

• The constructor for TNTPrimedCharged is only being called from the server, and onUpdate() for TNTPrimed and thus TNTPrimedCharged is also only being called by the server, as demostrated by adding print statements and the logs only show them printed from the SERVER thread.

The BlockTNT class (much of this is derived from vanilla code, but has been designed to take the corresponding custom primed TNT entity class while instantiating, the problem is not here because instantiating a default EntityTNTPrimed instead of the provided primed class does render correctly, but I have included this because this code helped demonstrate the origin of the problem):

I have recently created a custom dimension using data packs in Minecraft 1.16.5. This dimension is a part of a mod that I am writing and I am currently trying to generate custom ores in that dimension; However, I was not able to generate ores in a custom dimension the same way that I generate ores in the Overworld or Nether. As I mentioned the dimension is handled via data packs (.json files) but the biomes are handled in game code (.java). I am very new to Java & modding, any suggestions would be appreciated. Thanks in advance.

Minecraft version : 1.16.5
Forge version : 36.2.9

The current code for Overworld & Nether ore gen :

Trying to create an update script for Minecraft mods and need to be able to remove all the version numbers from the mods to search for the new version.

I have gotten it working to a point but am stuck on one last part. I cannot get it to leave out the 25 from pre25 from that line I need cfm pre (the 25 is the build number which I do not want)

So, basically, I'm making a website where you can search for Minecraft hacked clients. There is a search bar on the website, but you have to search in exact terms (different topic lol). Basically on the click of a button (search button) I then want to filter using the search term, (not automatically as I have it now) I've been searching but cant find a way to do it.

Code ->