Powershell ConvertFrom-Json编码特殊字符发行 [英] Powershell ConvertFrom-Json Encoding Special Characters Issue

问题描述

我的Powershell脚本中有此代码，在特殊字符部分上效果不佳.

I have this code in my powershell script and it doesn't do well on the special characters parts.

 $request = 'http://151.80.109.18:8082/vrageremote/v1/session/players'
 $a = Invoke-WebRequest -ContentType "application/json; charset=utf-8" $request |
 ConvertFrom-Json    |
 Select -expand Data |
 Select -expand players |
 Select displayName, factionTag | Out-file "$scriptPath\getFactionTag.txt"

在我的输出文件中，我只会得到'????'对于任何特殊字符.有人知道我如何在输出文件中显示特殊字符吗?

In my output file I only get '????' for any special characters. Does anyone know how I can get it to show special characters in my output file?

推荐答案

Peter Schneider的有用答案和Nas的有用答案都解决了您的方法中的一个问题:您需要:

Peter Schneider's helpful answer and Nas' helpful answer both address one problem with your approach: You need to:

• 之一:访问 Invoke-WebRequest 返回的响应对象的 .Content 属性，以获取返回的实际 data (作为JSON字符串)，然后您可以将其传递给 ConvertFrom-Json .

• either: access the .Content property on the response object returned by Invoke-WebRequest to get the actual data returned (as a JSON string), which you can then pass to ConvertFrom-Json.

或:改为使用 Invoke-RestMethod ，它直接返回数据 并将其解析为自定义对象，因此您可以直接使用这些对象，而无需 ConvertTo-Json ；但是，对于这种情况下的字符编码问题，这不是 选项，因为需要对JSON字符串进行显式重新编码-参见下文.

or: use Invoke-RestMethod instead, which returns the data directly and parses it into custom objects, so you can work with these objects directly, without the need for ConvertTo-Json; however, with a character-encoding problem such as in this case this is not an option, because explicit re-encoding of the JSON string is needed - see below.

但是，您仍然有一个字符编码问题，因为 中缺少 charset 信息> response 标头，PowerShell解释为以

However, you still have a character-encoding problem, because, in the absence of charset information in the response header, PowerShell interprets the UTF-8-encoded JSON string returned as ISO-8859-1-encoded (still applies as of PowerShell 7.0).

有两种可能的解决方案(除了切换到PowerShell Core 之外):

There are two possible solutions (other than switching to PowerShell Core):

• 最好将Web服务修改为在响应标头的 ContenType 字段中包含 charset = utf-8 .

如果无法执行此操作，则必须明确地重新编码收到的字符串，以纠正字符编码的误解.

If you can't do that, you must explicitly re-encode the string received to correct the character-encoding misinterpretation.

这是后者的实现:

$request = 'http://151.80.109.18:8082/vrageremote/v1/session/players'
$a = Invoke-WebRequest -ContentType "application/json; charset=utf-8" $request

# $a.Content now contains the *misinterpreted* JSON string, so we must 
# obtain its byte representation and re-interpret the bytes as UTF-8.
# Encoding 28591 represents the ISO-8859-1 encoding - see https://docs.microsoft.com/en-us/windows/desktop/Intl/code-page-identifiers
$jsonCorrected = [Text.Encoding]::UTF8.GetString(
  [Text.Encoding]::GetEncoding(28591).GetBytes($a.Content)
)

# Now process the reinterpreted string.
$jsonCorrected |
  ConvertFrom-Json    |
  Select -expand Data |
  Select -expand players |
  Select displayName, factionTag | Out-file "$scriptPath\getFactionTag.txt"

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