PowerShell 技能连载 - 自动创建 HTTP 响应码清单

在前一个示例中我们学习了如何自动将数值型的 HTTP 响应码转换为描述性的文本，只需要将它们转换为 System.Net.HttpStatusCode 即可。

PS> [System.Net.HttpStatusCode]500
InternalServerError

这是因为 System.Net.HttpStatusCode 是一个所谓的“枚举”，其作用类似于“查找表”。您可以轻松地转储枚举的所有成员，例如创建一个 HTTP 响应代码表：

[Enum]::GetValues([System.Net.HttpStatusCode]) |
  ForEach-Object {
    [PSCustomObject]@{
        Code = [int]$_
        Description = $_.toString()
    }
  }

以上是创建一个最常见的 HTTP 响应码所需要的所有代码。

Code Description
---- -----------
 100 Continue
 101 SwitchingProtocols
 200 OK
 201 Created
 202 Accepted
 203 NonAuthoritativeInformation
 204 NoContent
 205 ResetContent
 206 PartialContent
 300 MultipleChoices
 300 MultipleChoices
 301 MovedPermanently
 301 MovedPermanently
 302 Redirect
 302 Redirect
 303 SeeOther
 303 SeeOther
 304 NotModified
 305 UseProxy
 306 Unused
 307 TemporaryRedirect
 307 TemporaryRedirect
 400 BadRequest
 401 Unauthorized
 402 PaymentRequired
 403 Forbidden
 404 NotFound
 405 MethodNotAllowed
 406 NotAcceptable
 407 ProxyAuthenticationRequired
 408 RequestTimeout
 409 Conflict
 410 Gone
 411 LengthRequired
 412 PreconditionFailed
 413 RequestEntityTooLarge
 414 RequestUriTooLong
 415 UnsupportedMediaType
 416 RequestedRangeNotSatisfiable
 417 ExpectationFailed
 426 UpgradeRequired
 500 InternalServerError
 501 NotImplemented
 502 BadGateway
 503 ServiceUnavailable
 504 GatewayTimeout
 505 HttpVersionNotSupported

这种方法适用于您可能遇到的任何枚举。只需更改枚举数据类型的名称即可。这个例子转储可用的控制台颜色代码：

[Enum]::GetValues([System.ConsoleColor]) |
  ForEach-Object {
    [PSCustomObject]@{
        Code = [int]$_
        Description = $_.toString()
    }
  }



Code Description
---- -----------
    0 Black
    1 DarkBlue
    2 DarkGreen
    3 DarkCyan
    4 DarkRed
    5 DarkMagenta
    6 DarkYellow
    7 Gray
    8 DarkGray
    9 Blue
  10 Green
  11 Cyan
  12 Red
  13 Magenta
  14 Yellow
  15 White