Codex排查API故障怎么做：客户端、网络、网关和上游分层检查

if ($PSVersionTable.PSVersion.Major -lt 7) { throw "请使用 PowerShell 7" }
foreach ($name in @("TROUBLESHOOT_URL", "TROUBLESHOOT_MODEL", "TROUBLESHOOT_KEY")) {
  if ([string]::IsNullOrWhiteSpace([Environment]::GetEnvironmentVariable($name))) {
    throw "缺少本地环境变量：$name"
  }
}
$target = [uri]$env:TROUBLESHOOT_URL
if ($target.Scheme -ne "https" -or $target.UserInfo -or $target.Query) {
  throw "请提供不含凭证和查询参数的完整 HTTPS API URL"
}
$started = [DateTimeOffset]::UtcNow.ToString("o")
$timer = [Diagnostics.Stopwatch]::StartNew()
$body = @{
  model = $env:TROUBLESHOOT_MODEL
  input = "Reply with OK."
  stream = $false
} | ConvertTo-Json -Compress
try {
  $response = Invoke-WebRequest -Uri $target -Method Post -TimeoutSec 60 -SkipHttpErrorCheck -ContentType "application/json" -Headers @{Authorization = "Bearer " + $env:TROUBLESHOOT_KEY} -Body $body
  $timer.Stop()
  [pscustomobject]@{
    startedUtc = $started
    host = $target.Host
    path = $target.AbsolutePath
    status = [int]$response.StatusCode
    elapsedMs = $timer.ElapsedMilliseconds
    requestId = [string]($response.Headers["x-request-id"] -join ",")
    retryAfter = [string]($response.Headers["Retry-After"] -join ",")
  } | ConvertTo-Json | Set-Content -LiteralPath incident-summary.json -Encoding utf8
  $response.Content | Set-Content -LiteralPath incident-response.txt -Encoding utf8
  Get-Content -LiteralPath incident-summary.json
} catch {
  $timer.Stop()
  [pscustomobject]@{
    startedUtc = $started
    host = $target.Host
    path = $target.AbsolutePath
    httpResponseRecorded = $false
    elapsedMs = $timer.ElapsedMilliseconds
    exceptionType = $_.Exception.GetType().FullName
  } | ConvertTo-Json | Set-Content -LiteralPath incident-summary.json -Encoding utf8
  Get-Content -LiteralPath incident-summary.json
  throw
}