PowerShell 5中Invoke-RestMethod的Form参数替代方案咨询

问题说明 #

你提供的PowerShell 7代码中，Invoke-RestMethod的-Form参数是PowerShell 7及以上版本专属特性，PowerShell 5不支持该参数，因此运行时会触发报错。需要修改文件上传逻辑，手动构造multipart/form-data格式的请求来替代-Form参数的功能。

修改后的完整代码 #

Write-Host -ForegroundColor Green ("Scan completed!") `n

#3. Export the scan to the FPR format
$fprurl = 'http://' + $wiAPIurl + '/webinspect/scanner/scans/' + $scanId + '.fpr '
$path = $scanId + '.fpr'

Write-Host ("Downloading the result file (fpr)...")
Invoke-RestMethod -Credential $cred -Method GET -OutFile $path -uri "$fprurl"
Write-Host -ForegroundColor Green ("Result file (fpr) download done!") `n
 
#4. Upload the Results to SSC - PowerShell 5兼容版本
# 生成随机边界符，用于分隔表单内容
$boundary = [System.Guid]::NewGuid().ToString()
# 读取FPR文件的二进制内容
$fileContent = [System.IO.File]::ReadAllBytes($path)

# 构造multipart/form-data请求体
$bodyLines = @(
    "--$boundary",
    'Content-Disposition: form-data; name="file"; filename="' + (Split-Path $path -Leaf) + '"',
    'Content-Type: application/octet-stream',
    '',
    [System.Text.Encoding]::UTF8.GetString($fileContent),
    "--$boundary--",
    ''
)
$body = [System.Text.Encoding]::UTF8.GetBytes($bodyLines -join "`r`n")

# 设置请求头，注意Content-Type要包含边界符
$sscheaders = @{
    "Authorization" = "FortifyToken $sscToken"
    "accept" = "application/json"
    "Content-Type" = "multipart/form-data; boundary=$boundary"
}

$sscuploadurl = $sscURL + 'api/v1/projectVersions/' + $applicationVersionID + '/artifacts'

Write-Host ("Starting Upload to SSC...")
Invoke-RestMethod -Uri $sscuploadurl -Method POST -Headers $sscheaders -Body $body
Write-Host -ForegroundColor Green ("Finished! Scan Results are now available in the Software Security Center!")

关键修改点说明 #

1. 简化请求头构造：直接用哈希表定义请求头，移除不必要的Invoke-Expression调用，同时动态设置带边界符的Content-Type
2. 生成边界符：用GUID生成唯一的边界字符串，确保表单字段分隔逻辑正确
3. 手动构造请求体：严格按照multipart/form-data格式要求，拼接文件字段描述、文件内容和边界符，最终转换为字节数组
4. 替换-Form参数：通过-Body参数传入构造好的请求体，实现PowerShell 5环境下的文件上传功能

内容的提问来源于stack exchange，提问作者cekodis681 cekodis681