# Force-overwrite WenChuanyi.Api.dll via app_offline (dll size identical -> size-check skipped it)
$ErrorActionPreference = "Continue"
$h="116.198.221.125"; $p=21; $u="wenchuanyi"; $pw="r7P^f*v7rFts"
$LocalDll="D:\CodeBuddy\Pros\WenChuanyi\backend\WenChuanyi.Api\bin\Release\net8.0\publish\WenChuanyi.Api.dll"
$Log="D:\CodeBuddy\Pros\WenChuanyi\deploy\force_dll.log"
Set-Content $Log "=== force dll start $(Get-Date -Format 'HH:mm:ss') ===" -Encoding UTF8
function L([string]$m){ Add-Content $Log $m -Encoding UTF8; Write-Host $m }
function NewR([string]$path,[string]$m,[int]$t=90000){ $r=[System.Net.FtpWebRequest]::Create("ftp://${h}:${p}/"+$path.TrimStart('/')); $r.Method=$m; $r.Credentials=New-Object System.Net.NetworkCredential($u,$pw); $r.UsePassive=$true; $r.UseBinary=$true; $r.KeepAlive=$false; $r.Timeout=$t; return $r }
function UpRaw([string]$lp,[string]$rp){
  $b=[IO.File]::ReadAllBytes($lp); $r=NewR $rp ([System.Net.WebRequestMethods+Ftp]::UploadFile) 300000
  $r.ContentLength=$b.Length; $s=$r.GetRequestStream(); try{ $s.Write($b,0,$b.Length) } finally { $s.Close() }
  $resp=$r.GetResponse(); try{ $resp.Close() }catch{}; L "UP $rp len=$($b.Length)"
}
# 1. stop app
Set-Content "$env:TEMP\app_offline.htm" "maintenance" -Encoding UTF8
try{ UpRaw "$env:TEMP\app_offline.htm" "/wwwroot/app_offline.htm" }catch{ L "offline up err: $($_.Exception.Message)" }
L "wait 7s..."; Start-Sleep -Seconds 7
# 2. force dll
try{ UpRaw $LocalDll "/wwwroot/WenChuanyi.Api.dll"; L "DLL FORCE-UP OK" }catch{ L "DLL FAIL: $($_.Exception.Message)" }
Start-Sleep -Seconds 1
# 3. remove app_offline -> restart
try{ $r=NewR "/wwwroot/app_offline.htm" ([System.Net.WebRequestMethods+Ftp]::DeleteFile); $resp=$r.GetResponse(); try{$resp.Close()}catch{}; L "app_offline removed (restarting)" }catch{ L "offline del err: $($_.Exception.Message)" }
Remove-Item "$env:TEMP\app_offline.htm" -ErrorAction SilentlyContinue
L "=== force dll end ==="