imba-tjd

# 当两台电脑都有公网IP，却无法访问时，可能是被防火墙拦截了。inbound filter只允许内部往外部建立连接。
# 想到普通家宽，建立连接后，双方是可以互发消息的，证明网络是通的。而UDP是无连接的，怎么做到收回复呢？
# 其实防火墙的原理是检测发出去的五元组，遇到对应的回复就放行传入。
# 从实践上来说，只要双方互发消息，就可以了。这就是“打洞”

import socket, time, sys, threading

s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
s.bind(('::', int(sys.argv[1])))
target = (sys.argv[2], int(sys.argv[3]))

imba-tjd

// https://learn.microsoft.com/zh-cn/windows/win32/Http
// gcc server.c -Os -Wall -lhttpapi -o server

#define WIN32_LEAN_AND_MEAN

#include <stdio.h>
#include <stdlib.h>
#include <http.h>
#include <windows.h>
#include <signal.h>

imba-tjd

# needs Admin privilege
# TODO: Add -confirm

$rules = Get-NetFirewallRule

foreach ($rule in $rules) {
    if ($rule.Name.contains("Query User")) {
        $filepath = $rule.Name.Substring($rule.Name.Indexof('}')+1)
        if (-not (Test-Path $filepath)) {
            echo "Removing $filepath"

imba-tjd

I googled it for a long time and I'm really suprised no one mentioned this.

• .NET5+ https://github.com/microsoft/CsWinRT
• FX4.6+ https://www.nuget.org/packages/Microsoft.Windows.SDK.Contracts

imba-tjd

// This program helps pwsh to read from external program output from utf8 encoding.
// Compile: bflat build xargsu2a.cs -Ot --no-debug-info --no-globalization --no-reflection --no-stacktrace-data
// License: MIT

using System;
using System.Diagnostics;
using System.Text;

if (args.Length == 0)
{

imba-tjd

// https://github.com/abejfehr/URLDecode
// Compile: gcc -Ofast -mtune=native -D__USE_MINGW_ANSI_STDIO -o urld.exe
// When decoding UTF8-encoded data, work with [xargsu2a](https://gist.github.com/imba-tjd/0a5a41df029babc6c814efe5d9296593)
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

char *urlDecode(const char *str) {
  int d = 0;

imba-tjd

// Git for Windows or git-bash contains a realpath.exe which is required by git code.editor
// However I'm using Git distribution from VS, which doesn't have it.
// Copying from Git for Windows isn't a good choice because it needs msys-2.0.dll
// This program offers similar function, which is enough for me.
// It won't resolve '~'. It works when path contains whitespaces.

package main

import (
	"fmt"

imba-tjd

// KP Backuper：帮助解决卡琳典狱长在非最低难度下强制覆盖自动保存的特性。
// 放到与nw.exe同一目录下。运行后每隔一分钟会检测存档有没有发生变化，如果变了，就备份到www/save_bak目录下。
// 并发安全性：读取时会加读锁，因此不会读到一半游戏自动保存导致读取内容错误，副作用是此次游戏的自动保存会不生效（静默失败）；但本游戏保存很频繁，因此无影响。对于游戏保存到一半时本程序触发读，本程序会过一秒钟重试。
// 编译：C:\tools\bflat-7.0.1-windows-x64\bflat.exe build KPBackuper.cs -Os --no-globalization --no-reflection --no-stacktrace-data && upx --lzma KPBackuper.exe
using System;
using System.IO;
using System.Threading;
using System.Runtime.InteropServices;

[DllImport("user32")]

imba-tjd

// LICENSE: MIT
using System;
using System.IO;
using System.Diagnostics;
using System.Reflection;

class Ngenize
{
    const string NgenX86Path = @"C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe";
    const string NgenX64Path = @"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe";

imba-tjd

/*  SQLite Device Characteristics Check

Goal:
    Tell you whether -DSQLITE_ENABLE_ATOMIC_WRITE has benefits on your filesystem.
    However I don't konw much about sqlite so the logic may not be right.

Usage:
    Download sqlite3 source code.
    gcc check.c sqlite3.c -DSQLITE_THREADSAFE=0 -DSQLITE_ENABLE_ATOMIC_WRITE -DSQLITE_OMIT_LOAD_EXTENSION