@echo off
rem ==========================================================================
rem PCL download-limit unlocker (patches Plain Craft Launcher 2.exe in place)
rem
rem What it does:
rem The launcher hides Minecraft downloads behind the compile-time constant
rem "RestrictMcDownload". This script rewrites the tiny IL method
rem PCL.PageDownloadInstall::LoaderInit so the download page uses the real
rem version-list loader (PCL.ModDownload::DlClientListLoader) instead of the
rem "download disabled" loader that always throws.
rem
rem How to use:
rem Put this .bat next to "Plain Craft Launcher 2.exe" and double-click it,
rem or drag the exe onto this .bat. A backup (*.bak_yyyyMMdd_HHmmss) is made
rem before the exe is modified.
rem
rem Option: --no-pause do not wait for a key press when finished.
rem ==========================================================================
setlocal EnableExtensions
set "BATFILE=%~f0"
set "PSFILE=%TEMP%\pcl_unlock_mcdl_%RANDOM%%RANDOM%.ps1"
powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "$bytes=[IO.File]::ReadAllBytes($env:BATFILE);$u=New-Object Text.UTF8Encoding($false,$true);try{$b=$u.GetString($bytes)}catch{$b=[Text.Encoding]::GetEncoding(936).GetString($bytes)};$m='#@@PCL_UNLOCK_PS_BEGIN@@#';$i=$b.LastIndexOf($m);if($i -lt 0){exit 9};$c=$b.Substring($i+$m.Length).TrimStart([char[]](13,10));[IO.File]::WriteAllText($env:PSFILE,$c,(New-Object Text.UTF8Encoding($true)))"
if errorlevel 1 (
echo.
echo [ERROR] Failed to prepare the patch script. Windows PowerShell is required.
pause
exit /b 1
)
powershell.exe -NoProfile -ExecutionPolicy Bypass -File "%PSFILE%" -BatDir "%~dp0." -CurrentDir "%CD%" -Target "%~1"
set "RC=%ERRORLEVEL%"
del /f /q "%PSFILE%" >nul 2>&1
echo.
if /i "%~1"=="--no-pause" exit /b %RC%
pause
exit /b %RC%
#@@PCL_UNLOCK_PS_BEGIN@@#
# ==========================================================================
# PCL 下载限制解除补丁:直接修改 Plain Craft Launcher 2.exe
#
# 原理:开源版编译时 RestrictMcDownload=True 被编译器折叠,下载页的
# LoaderInit 被替换成“关闭下载”的 LoaderTask(一运行就抛异常)。
# 本脚本把该方法体改回使用真正的版本列表加载器
# PCL.ModDownload::DlClientListLoader,其它代码一律不动。
#
# 用法:把 .bat 放到 exe 同目录双击,或把 exe 拖到 .bat 上。
# 修改前自动备份;重复运行是安全的。
# ==========================================================================
param(
[string]$BatDir = '',
[string]$CurrentDir = '',
[string]$Target = ''
)
$ErrorActionPreference = 'Stop'
# 输出被重定向(管道/文件)时改用 UTF-8,避免中文乱码
if ([Console]::IsOutputRedirected) {
try { [Console]::OutputEncoding = New-Object System.Text.UTF8Encoding($false) } catch { }
}
$script:ExeName = 'Plain Craft Launcher 2.exe'
$script:Steps = 5
$script:MethodFlags = [Reflection.BindingFlags]'Public,NonPublic,Instance,Static,DeclaredOnly'
function Write-Step {
param([int]$Number, [string]$Text)
Write-Host (' [{0}/{1}] {2}' -f $Number, $script:Steps, $Text) -ForegroundColor Yellow
}
function Write-Detail {
param([string]$Text)
Write-Host (' ' + $Text) -ForegroundColor Gray
}
function Write-Fail {
param([string]$Text)
Write-Host ''
Write-Host (' [失败] ' + $Text) -ForegroundColor Red
}
function Resolve-ExePath {
param([string]$Target, [string[]]$Dirs)
$found = New-Object System.Collections.ArrayList
if (-not [string]::IsNullOrWhiteSpace($Target)) {
if (Test-Path -LiteralPath $Target -PathType Leaf) {
$full = [IO.Path]::GetFullPath($Target)
if ([IO.Path]::GetExtension($full) -ieq '.exe') { [void]$found.Add($full) }
}
}
foreach ($dir in $Dirs) {
if ([string]::IsNullOrWhiteSpace($dir)) { continue }
if (-not (Test-Path -LiteralPath $dir -PathType Container)) { continue }
$exact = Join-Path $dir $script:ExeName
if (Test-Path -LiteralPath $exact -PathType Leaf) {
[void]$found.Add((Resolve-Path -LiteralPath $exact).Path)
continue
}
$alt = Get-ChildItem -LiteralPath $dir -Filter '*Craft Launcher*.exe' -File -ErrorAction SilentlyContinue | Select-Object -First 1
if ($alt) { [void]$found.Add($alt.FullName) }
}
if ($found.Count -eq 0) { return $null }
return $found[0]
}
function Get-PclInfo {
param([byte[]]$Bytes)
$asm = [Reflection.Assembly]::Load($Bytes)
$type = $asm.GetType('PCL.PageDownloadInstall', $false)
if ($null -eq $type) { throw '找不到 PCL.PageDownloadInstall 类型,这可能不是 PCL 主程序。' }
$method = $type.GetMethod('LoaderInit', $script:MethodFlags)
if ($null -eq $method) { throw '找不到 LoaderInit 方法,exe 版本不受支持。' }
$modDownload = $asm.GetType('PCL.ModDownload', $false)
if ($null -eq $modDownload) { throw '找不到 PCL.ModDownload 类型,exe 版本不受支持。' }
$field = $modDownload.GetField('DlClientListLoader', [Reflection.BindingFlags]'Public,Static')
if ($null -eq $field) { throw '找不到 DlClientListLoader 字段,exe 版本不受支持。' }
return [pscustomobject]@{
Assembly = $asm
Type = $type
Method = $method
IL = $method.GetMethodBody().GetILAsByteArray()
Token = $field.MetadataToken
}
}
function Test-RestrictedIL {
param([byte[]]$IL)
return (
$IL.Length -eq 94 -and
$IL[0x19] -eq 0x14 -and # ldnull
$IL[0x1A] -eq 0x72 -and # ldstr "关闭下载"
$IL[0x1F] -eq 0x7E -and # ldsfld <closure>
$IL[0x4A] -eq 0x02 -and # ldarg.0
$IL[93] -eq 0x2A # ret
)
}
function Test-UnlockedIL {
param([byte[]]$IL, [int]$Token)
if ($IL.Length -lt 0x20) { return $false }
if ($IL[0x1A] -ne 0x7E) { return $false }
return ([BitConverter]::ToInt32($IL, 0x1B) -eq $Token)
}
function New-Backup {
param([string]$Path)
$stamp = Get-Date -Format 'yyyyMMdd_HHmmss'
$bak = ('{0}.bak_{1}' -f $Path, $stamp)
$n = 1
while (Test-Path -LiteralPath $bak) {
$bak = ('{0}.bak_{1}_{2}' -f $Path, $stamp, $n)
$n++
}
Copy-Item -LiteralPath $Path -Destination $bak -Force
return $bak
}
function Restore-Backup {
param([string]$Path, [string]$Backup)
try {
Copy-Item -LiteralPath $Backup -Destination $Path -Force
return $true
} catch {
return $false
}
}
try {
Write-Host ''
Write-Host ' ==============================================================' -ForegroundColor Cyan
Write-Host ' PCL 下载限制解除(直接修改 Plain Craft Launcher 2.exe)' -ForegroundColor Cyan
Write-Host ' ==============================================================' -ForegroundColor Cyan
Write-Host ''
# ---------- 1. 定位 exe ----------
Write-Step 1 '正在定位 Plain Craft Launcher 2.exe ...'
$exePath = Resolve-ExePath -Target $Target -Dirs @($BatDir, $CurrentDir, (Get-Location).Path)
if (-not $exePath) {
Write-Fail '没有找到 Plain Craft Launcher 2.exe。'
Write-Host ' 请把本脚本放到 PCL 所在文件夹后运行,或把 exe 拖到本脚本上。' -ForegroundColor Gray
exit 1
}
Write-Detail ('程序路径:' + $exePath)
$fileSize = (Get-Item -LiteralPath $exePath -Force).Length
# ---------- 2. 分析程序 ----------
Write-Step 2 '正在分析程序版本 ...'
$bytes = [IO.File]::ReadAllBytes($exePath)
try {
$info = Get-PclInfo -Bytes $bytes
} catch {
Write-Fail $_.Exception.Message
Write-Host ' 本工具只支持 PCL 2.x 的 .NET 版 Plain Craft Launcher 2.exe。' -ForegroundColor Gray
exit 1
}
Write-Detail ('版本:' + $info.Assembly.GetName().Version + ',文件大小:' + $fileSize + ' 字节')
if (Test-UnlockedIL -IL $info.IL -Token $info.Token) {
Write-Host ''
Write-Host ' 这个 exe 已经解除过下载限制,无需重复修改。' -ForegroundColor Green
Write-Detail '如需还原:用同目录下的 *.bak_* 备份文件覆盖回来即可。'
exit 0
}
if (-not (Test-RestrictedIL -IL $info.IL)) {
Write-Fail '没有找到预期的“关闭下载”代码,这个 exe 版本暂不支持。'
Write-Detail ('LoaderInit 长度:' + $info.IL.Length + ' 字节(预期 94)')
exit 1
}
# ---------- 3. 备份 ----------
Write-Step 3 '正在备份原程序 ...'
$backupPath = New-Backup -Path $exePath
Write-Detail ('备份:' + $backupPath)
# ---------- 4. 修改 ----------
Write-Step 4 '正在写入补丁 ...'
Write-Detail 'LoaderInit:限制加载器 -> DlClientListLoader'
$latin1 = [Text.Encoding]::GetEncoding(28591)
$haystack = $latin1.GetString($bytes)
$needle = $latin1.GetString($info.IL)
$ilOffset = $haystack.IndexOf($needle, [StringComparison]::Ordinal)
if ($ilOffset -lt 0) {
Write-Fail '在 exe 文件里找不到 LoaderInit 的代码,已放弃修改。'
exit 1
}
if ($haystack.IndexOf($needle, $ilOffset + 1, [StringComparison]::Ordinal) -ge 0) {
Write-Fail '文件中匹配到多处相同代码,为避免误改已停止。'
exit 1
}
$patchedIL = [byte[]]$info.IL.Clone()
$patchedIL[0x1A] = 0x7E
[Array]::Copy([BitConverter]::GetBytes($info.Token), 0, $patchedIL, 0x1B, 4)
for ($i = 0x1F; $i -lt 0x4A; $i++) { $patchedIL[$i] = 0x00 }
$patchOffset = $ilOffset + 0x1A
for ($i = 0; $i -lt 48; $i++) { $bytes[$patchOffset + $i] = $patchedIL[0x1A + $i] }
$item = Get-Item -LiteralPath $exePath -Force
$wasReadOnly = $item.IsReadOnly
if ($wasReadOnly) { $item.IsReadOnly = $false }
try {
[IO.File]::WriteAllBytes($exePath, $bytes)
} catch {
if ($wasReadOnly) { try { (Get-Item -LiteralPath $exePath -Force).IsReadOnly = $true } catch { } }
[void](Restore-Backup -Path $exePath -Backup $backupPath)
Write-Fail '写入失败,请先完全退出 PCL(包括托盘图标)后重试。'
Write-Host (' ' + $_.Exception.Message) -ForegroundColor DarkGray
exit 1
} finally {
if ($wasReadOnly) { try { (Get-Item -LiteralPath $exePath -Force).IsReadOnly = $true } catch { } }
}
# ---------- 5. 校验 ----------
Write-Step 5 '正在校验修改结果 ...'
$verify = Get-PclInfo -Bytes ([IO.File]::ReadAllBytes($exePath))
if (-not (Test-UnlockedIL -IL $verify.IL -Token $verify.Token)) {
[void](Restore-Backup -Path $exePath -Backup $backupPath)
Write-Fail '写入后的校验没有通过,已自动还原为原程序。'
exit 1
}
try {
[Runtime.CompilerServices.RuntimeHelpers]::PrepareMethod($verify.Method.MethodHandle)
} catch {
[void](Restore-Backup -Path $exePath -Backup $backupPath)
Write-Fail '补丁后的代码无法通过编译,已自动还原为原程序。'
Write-Host (' ' + $_.Exception.Message) -ForegroundColor DarkGray
exit 1
}
Write-Detail '校验通过:代码可正常编译,下载加载
存成.bat
bat脚本要和Plain Craft Launcher 2.exe放在同一个文件夹 运行bat即可
原理: 更换PCL内版本列表加载器
脚本bat本体:
PCL解除下载限制.zip (4.6 KB)
实测 2026-10-20T12:24:00Z 最新版的 2.99.0.0 PCL2 可以解除下载限制


