Unable to submit forms to be analyzed - microsoft-cognitive

Question

I have created my Form Recognizer AI, trained it, and received the modelID but when I actually go to implement this in Powershell it errors out, telling me it cannot read the file so I suspect it has something to do with my file being sent.
This is for form-recognizer 2.0, any suggestions?
cls
$aiFormRecognizerKey = '{apiKey}'
$aiFormRecognizerEndPoint = 'https://{Url}.cognitiveservices.azure.com/'
$aiModelToUse = 'f11f43a7-6207-4dc9-9e8a-fc58677047f1'
$headers = #{
"Ocp-Apim-Subscription-Key" = $aiFormRecognizerKey
"Content-Type" = "application/pdf"
}
$FormFields = #{
"form-data" = Get-Item C:\temp\test3.pdf
"type" = "application/pdf"
}
$analyzedDocumentLocation = (Invoke-WebRequest ($aiFormRecognizerEndPoint + 'formrecognizer/v2.0- preview/custom/models/' + $aiModelToUse + '/analyze' ) -Method "POST" -Headers ($headers) -Body $FormFields ).Headers.'Operation-Location'
$analyzedDocumentLocation
$uriTest = 'https://{url}.cognitiveservices.azure.com/formrecognizer/v2.0- preview/custom/models/5b4cb7c4-406f-400d-b53e-7d50fecd4a1d/analyzeresults/b07b863e-0aa5-4e1d-9a64- 73eb18c1f793'
Invoke-WebRequest -uri $uriTest -Method "GET" -Headers ($headers)
Edit:
Here is the solution for anyone curious such as myself:
cls
$aiFormRecognizerKey = '{Key}'
$aiFormRecognizerEndPoint =
'https://{MyEndPoint}.cognitiveservices.azure.com/'
$aiModelToUse = '{TrainedModelId}'
$headers = #{
"Ocp-Apim-Subscription-Key" = $aiFormRecognizerKey
}
$analyzedDocumentLocation = (Invoke-WebRequest -InFile C:\temp\test1.pdf -
ContentType "application/pdf" -uri ($aiFormRecognizerEndPoint +
'formrecognizer/v2.0-preview/custom/models/' + $aiModelToUse + '/analyze' )
-Method "POST" -Headers ($headers)).Headers.'Operation-Location'
$analyzedDocumentLocation
$uriTest = $analyzedDocumentLocation[0]
$FileStream.Close()
Start-Sleep -s 10
(Invoke-WebRequest -uri $uriTest -Method "GET" -Headers ($headers)).Content

Answer 1

It looks like your request body is attempting to use multipart/form-data which is no longer supported in v2.0 (although if it were, you would need to use that value in your Content-Type header).
Instead, you should pass the file content directly in the body parameter. Here's an end-to-end sample for PowerShell:
# Config
$headers = #{ "Ocp-Apim-Subscription-Key" = "your_key" }
$endpoint = "https://your_region.cognitiveservices.azure.com/formrecognizer/v2.0-preview"
# Train
$body = #{
"source" = "https://your_azure_storage_container_sas_url";
"sourceFilter" = #{ "prefix" = "optional" }
} | ConvertTo-Json
$resp = Invoke-WebRequest "$endpoint/custom/models" -Method "POST" -Headers $headers -Body $body -ContentType "application/json"
$location = $resp.Headers.Location[0]
$modelId = $location.Substring($location.LastIndexOf('/') + 1)
Write-Output "ModelId: $modelId"
# Wait for training
$status = $null
do {
Start-Sleep -Seconds 5
$resp = Invoke-WebRequest $location -Headers $headers
$body = $resp.Content | ConvertFrom-Json
$status = $body.modelInfo.status
Write-Output "Training... $status"
} while ($status -eq "creating")
if ($status -ne "ready") {
throw "Training failed"
}
# Analyze
$content = Get-Content -Raw /path/to/your/file.pdf -ReadCount 0
$contentType = "application/pdf"
$resp = $content | Invoke-WebRequest "$endpoint/custom/models/$modelId/analyze" -Method "POST" -Headers $headers -ContentType $contentType
$location = $resp.Headers.'Operation-Location'[0]
# Wait for analysis
$status = $null
do {
Start-Sleep -Seconds 5
$resp = Invoke-WebRequest $location -Headers $headers
$body = $resp.Content | ConvertFrom-Json
$status = $body.status
Write-Output "Analyzing... $status"
} while ($status -eq "notStarted" -or $status -eq "running")
if ($status -ne "succeeded") {
throw "Analysis failed"
}
# Output
Write-Output $resp.Content
Note that I'm piping $content (the PDF) into Invoke-WebRequest. You might also be able to load the file into memory and pass using the -Body parameter.
Hope this helps!