解析文件名中丢失的字符，就像读取/斜杠字符一样

计算机上的文件名是这样命名的

quant-ph9501001
math9901001
cond-mat0001001
hep-lat0308001
gr-qc0703001  

但在 http 链接上文件名是/包括角色

quant-ph/9501001
math/9901001
cond-mat/0001001
hep-lat/0308001
gr-qc/0703001  

我无法重命名我的文件quant-ph9501001 into quant-ph/9501001因为/是非法字符，因此我无法正确使用我的代码来解析和重命名syntax to 脚本动作.

我的文件名的语法遵循以下模式：

letters + 8 digits
letters + '-' + letters + 8 digits  

我可以改变quant-ph9501001 to quant-ph_9501001，但我需要解析文件名中缺少的字符，就像阅读一样/（斜杠字符）。

所以如果我有像这样的字符串

gr-qc0701001
gr-qc_0701001  

它应该读起来像

quant-ph/9501001  

我的脚本无法工作（无法解析）gr-qc/0701001因为我无法使用非法字符重命名文件名。错误是404。

iwr ：远程服务器返回错误：(404) 未找到。

如果脚本正常工作，PowerShell 应该返回以下字符串：

General Relativity and Quantum Cosmology (gr-qc)  

文件名应该是

Spectral Broadening of Radiation from Relativistic Collapsing Objects  

我的脚本是

    $list1 = @"
quant-ph9802001
quant-ph9802004
"@

$list2 = @"
quant-ph/9802001
quant-ph/9802004
"@

Write-Output "Adding forward slashes"
$list1 -split "`r`n" | % {
    $item = $_.Trim()
    $newItem = $item -replace '(.*)(\d{7})', '$1/$2'
    Write-Output $("{0} ==>  {1}" -f $item, $newItem)
}

Write-Output "Removing forward slashes"
$list2 -split "`r`n" | % {
    $item = $_.Trim()
    $newItem = $item -replace '(.*)/(\d{7})', '$1$2'
    Write-Output $("{0} ==>  {1}" -f $item, $newItem)
}

Function Clean-InvalidFileNameChars {
  param(
    [Parameter(Mandatory=$true,
      Position=0,
      ValueFromPipeline=$true,
      ValueFromPipelineByPropertyName=$true)]
    [String]$Name
  )

  $invalidChars = [IO.Path]::GetInvalidFileNameChars() -join ''
  $re = "[{0}]" -f [RegEx]::Escape($invalidChars)
  $res=($Name -replace $re)
  return $res.Substring(0, [math]::Min(260, $res.Length))
}

Function Clean-InvalidPathChars {
  param(
    [Parameter(Mandatory=$true,
      Position=0,
      ValueFromPipeline=$true,
      ValueFromPipelineByPropertyName=$true)]
    [String]$Name
  )

  $invalidChars = [IO.Path]::GetInvalidPathChars() -join ''
  $re = "[{0}]" -f [RegEx]::Escape($invalidChars)
  $res=($Name -replace $re)
  return $res.Substring(0, [math]::Min(248, $res.Length))
}


$rootpath="c:\temp2"

$rootpathresult="c:\tempresult"

$template=@'
[3]  arXiv:1611.00057 [pdf, ps, other] 
Title: {title*:Holomorphy of adjoint $L$ functions for quasisplit A2} 
Authors: Joseph Hundley 
Comments: 18 pages 
Subjects: {subject:Number Theory (math.NT)} 
[4]  arXiv:1611.00066 [pdf, other] 
Title: {title*:Many Haken Heegaard splittings} 
Authors: Alessandro Sisto 
Comments: 12 pages, 3 figures 
Subjects: {subject:Geometric Topology (math.GT)} 
[5]  arXiv:1611.00067 [pdf, ps, other] 
Title: {title*:Subsumed homoclinic connections and infinitely many coexisting attractors in piecewise-linear maps} 
Authors: David J.W. Simpson, Christopher P. Tuffley 
Subjects: {subject:Dynamical Systems (math.DS)} 
[21]  arXiv:1611.00114 [pdf, ps, other] 
Title: {title*:Faces of highest weight modules and the universal Weyl polyhedron} 
Authors: Gurbir Dhillon, Apoorva Khare 
Comments: We recall preliminaries and results from the companion paper arXiv:1606.09640 
Subjects: {subject:Representation Theory (math.RT)}; Combinatorics (math.CO); Metric Geometry (math.MG)
'@

#extract utils data and clean 
$listbook=gci $rootpath -File -filter *.pdf | foreach { New-Object psobject -Property @{file=$_.fullname; books= ((iwr "https://arxiv.org/abs/$($_.BaseName)").ParsedHtml.body.outerText | ConvertFrom-String -TemplateContent $template)}} | select file -ExpandProperty books |  select file,  @{N="Subject";E={Clean-InvalidPathChars $_.subject}}, @{N="Title";E={Clean-InvalidFileNameChars $_.title}}  

#build dirs and copy+rename file
$listbook | %{$newpath="$rootpathresult\$($_.subject)"; New-Item -ItemType Directory -Path "$newpath" -Force;  Copy-Item $_.file "$newpath\$($_.title).pdf" -Force}

EDIT： Kori Gill 回答后错误仍然是 404

https://i.stack.imgur.com/P3jIR.png https://i.stack.imgur.com/P3jIR.png

问题是本地文件名和在线文件名之间的差异。我应该暂时在内存中添加本地文件名中的这个非法字符，否则脚本将无法工作。

我不能说我完全理解你的问题，但听起来你只需要将这些名称转换为具有或不具有正斜杠的格式。你提到了8位数字，但你的例子有7位。你可以根据需要进行调整。

我认为这样的事情会对你有所帮助......

$list1 = @"
quant-ph9501001
math9901001
cond-mat0001001
hep-lat0308001
gr-qc0703001
"@

$list2 = @"
quant-ph/9501001
math/9901001
cond-mat/0001001
hep-lat/0308001
gr-qc/0703001
"@

Write-Output "Adding forward slashes"
$list1 -split "`r`n" | % {
    $item = $_.Trim()
    $newItem = $item -replace '(.*)(\d{7})', '$1/$2'
    Write-Output $("{0} ==>  {1}" -f $item, $newItem)
}

Write-Output "Removing forward slashes"
$list2 -split "`r`n" | % {
    $item = $_.Trim()
    $newItem = $item -replace '(.*)/(\d{7})', '$1$2'
    Write-Output $("{0} ==>  {1}" -f $item, $newItem)
}

Outputs:

Adding forward slashes
quant-ph9501001 ==>  quant-ph/9501001
math9901001 ==>  math/9901001
cond-mat0001001 ==>  cond-mat/0001001
hep-lat0308001 ==>  hep-lat/0308001
gr-qc0703001 ==>  gr-qc/0703001
Removing forward slashes
quant-ph/9501001 ==>  quant-ph9501001
math/9901001 ==>  math9901001
cond-mat/0001001 ==>  cond-mat0001001
hep-lat/0308001 ==>  hep-lat0308001
gr-qc/0703001 ==>  gr-qc0703001