在 powershell -Command 中转义双引号

Question

Due to some limitations, I have to execute the Power Shell command from Windows Command Prompt

powershell -Command "(gc C:\my_configuration.conf) -replace 'INSERT_URL', \`"https://mytestserver/WW48.2'22/testing.bin\`" | Out-File C:\my_configuration.conf"

However, I am constantly getting the ParserError like below

The string is missing the terminator: '.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : TerminatorExpectedAtEndOfString

How should I properly wrap the URL string with double quotes? Thanks for answering.

Answer 1

Remove the ` before " , and your command should work; that is, when calling powershell.exe from cmd.exe / outside PowerShell, use \" , not \`" (or `" ) in order to escape " chars.:

powershell -Command "(gc C:\my_configuration.conf) -replace 'INSERT_URL', \"https://mytestserver/WW48.2'22/testing.bin\" | Out-File C:\my_configuration.conf"

While you do need to escape the " characters embedded in your overall "..." command string, escaping them as \" is sufficient - no need to also use ` , the backtick, PowerShell's usual escape character .

The PowerShell CLI ( powershell.exe ) expects \ -escaping of " , so as to better align with most CLIs, even though inside a PowerShell session you need to use `" or (inside "..." only) "" . ^[1]

You'd only need both \ and ` - in the form `\" , note that ` comes first - if your embedded "..." itself contained " chars; a contrived example:

:: OK: Prints '3" of snow.'
powershell.exe -c " Write-Output \"3`\" of snow.\" "

---

As iRon notes, an alternative solution is to use embedded '...' quoting (single-quoting) instead.

Since your URL itself contains a ' char., that character must then be escaped as '' :

:: Note the use of '...' around https://... and the inner ' escaped as ''
powershell -Command "(gc C:\my_configuration.conf) -replace 'INSERT_URL', 'https://mytestserver/WW48.2''22/testing.bin' | Out-File C:\my_configuration.conf"

---

^{[1] In PowerShell (Core) 7+ , whose CLI is pwsh.exe , you may alternatively use "" inside overall "..." on the command line too, which is actually the more robust choice when calling from cmd.exe . When calling . When calling powershell.exe from cmd.exe , the robust choice is "^"" (sic) - see [this answer](https://stackoverflow.com/a/49060341/45375). However, the PowerShell CLI recognizes " in _both_ editions, and " also works for " chars. _not_ inside overall chars. _not_ inside overall "..."`.}

Answer 2

Try using this syntax, always works

"%windir%\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "& { <# PUT ANYTHING HERE #> }"

You won't need to worry about escaping anything.

Your code:

"%windir%\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "& { (gc C:\my_configuration.conf) -replace 'INSERT_URL', "https://mytestserver/WW48.2%2722/testing.bin" | Out-File 'C:\my_configuration.conf' }"

EDIT1: Check here for URL special characters. the single quote (') can be handled by its replacement (%27) in your hard-coded string. (I changed it above in the 2nd code sample)