I'm facing some frustrating challenges with a REST API using PowerShell's Invoke-RestMethod. While I have their reference guide, it's lacking in details. Specifically, I'm getting a "400 Invalid Request" error when trying to 'PUT' data. Other requests are working fine, so I know my format is generally correct. Tech support suggested I use Postman, which shows detailed validation errors in a 'Validation Errors' tab. I tried looking into PowerShell for similar functionality, specifically using **$_.Exception** and **$_.validationErrors**. However, I can't access any kind of validation error information when using Invoke-RestMethod. How can I retrieve these validation errors from the API response?
2 Answers
It sounds like you're on the right track! Consider using the skip parameter as mentioned by another user. Here's an example code snippet that works for me in PowerShell 5:
```ps
try {
$r = Invoke-WebRequest -Uri $Uri
if ($r -and $r.StatusCode -ne 200) {
Log "Status Code: $($r.StatusCode) $($r.StatusDescription)"
$r.RawContent | Set-Content $ResponsePath -force
}
} catch [System.Net.WebException] {
$r = $_.Exception.Response
$m = $_.ErrorDetails.message
$statusCode = [int]$r.StatusCode
$Description = $r.StatusDescription
Log "Exception: $StatusCode $Description"
$m | Set-Content $ResponsePath -force
}
``` This should help log detailed error info!
Have you thought about switching to PowerShell 7? If you can, try using the skiphttperrorcheck parameter. It might give you more flexibility with error handling!
I appreciate the suggestion! However, I'm already using PS 7. The issues I face are related to incomplete requests being rejected by the API rather than HTTP header problems.