powershell - 我该如何纠正 “Command output already redirected”错误

Question

抱歉，这是一个新手问题。但是我一直在尝试使用gcloud Text to Speech API，并尝试将输出保存为文本文件。

我通过添加|将文件result.txt输出到下面的指令的最后一行。它只能运行一次，但由于它仅返回一个错误，表明输出已被重定向。

有什么想法可以解决这个问题吗？

$cred = gcloud auth application-default print-access-token
>> $headers = @{ "Authorization" = "Bearer $cred" }
>>
>> Invoke-WebRequest `
>>   -Method POST `
>>   -Headers $headers `
>>   -ContentType: "application/json; charset=utf-8" `
>>   -InFile f:\request.json `
>>   -Uri "https://texttospeech.googleapis.com/v1/text:synthesize" | Select-Object -Expand Content

//**Errors:**
At line:6 char:1
+ >>   -Headers $headers `
+ ~~~~~~~~~~~~~
The output stream for this command is already redirected.
At line:7 char:1
+ >>   -ContentType: "application/json; charset=utf-8" `
+ ~~~~~~~~~~~~~~~~~~
The output stream for this command is already redirected.
At line:8 char:1
+ >>   -InFile f:\request.json `
+ ~~~~~~~~~~~~
The output stream for this command is already redirected.
At line:9 char:1
+ >>   -Uri "https://texttospeech.googleapis.com/v1/text:synthesize" |  ...
+ ~~~~~~~~~
The output stream for this command is already redirected.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : StreamAlreadyRedirected

Answer 1

谢谢7cc-这是答案:
在每行的开头删除>>。看来您已从控制台窗口(包括“继续提示”)复制了该命令。并且它们被解释为重定向命令。