fix save data request

.agents/skills/elixforms-schema-bulk-updater/references/protocol.md

@@ -8,7 +8,7 @@ The default base URI is `https://console-unipr.elixforms.it/AJSRV/metadata`.
 - Search: `GET search?SEARCH_IN[]={schemaId}&S_{schemaId}_NEW_{fieldKey}={value}&PAGE={page}&AJL=it&PAGESIZE=80&SECURE=true`
 - Save: `POST save`
 
-Send the manually obtained cookie and `X-Requested-With: XMLHttpRequest` on every request. For saves, send one UTF-8 `multipart/form-data` part and an explicit byte-based content length.
+Send the manually obtained cookie and `X-Requested-With: XMLHttpRequest` on every request. For saves, send one `multipart/form-data` part through `Invoke-RestMethod` and let it calculate `Content-Length` from the body.
 
 ## Ordering and identifiers
 

.agents/skills/elixforms-schema-bulk-updater/scripts/Invoke-ElixFormsSchemaBulkUpdate.ps1

@@ -40,6 +40,7 @@ param(
 
 Set-StrictMode -Version Latest
 $ErrorActionPreference = 'Stop'
+Add-Type -AssemblyName System.Net.Http
 
 function ConvertTo-QueryString {
     [CmdletBinding()]
@@ -104,13 +105,7 @@ function Invoke-ElixFormsRequest {
         [Uri] $Uri,
 
         [Parameter(Mandatory)]
-        [string] $Cookie,
-
-        [Parameter()]
-        [byte[]] $Body,
-
-        [Parameter()]
-        [string] $ContentType
+        [string] $Cookie
     )
 
     $httpMethod = if ($Method -eq 'GET') { [Net.Http.HttpMethod]::Get } else { [Net.Http.HttpMethod]::Post }
@@ -123,16 +118,6 @@ function Invoke-ElixFormsRequest {
     $null = $request.Headers.TryAddWithoutValidation('Origin', $origin)
     $request.Headers.Referrer = [Uri] ($origin + '/ajconsole/')
 
-    if ($PSBoundParameters.ContainsKey('Body')) {
-        if ([string]::IsNullOrWhiteSpace($ContentType)) {
-            throw 'ContentType is required when Body is supplied.'
-        }
-
-        $request.Content = [Net.Http.ByteArrayContent]::new($Body)
-        $null = $request.Content.Headers.TryAddWithoutValidation('Content-Type', $ContentType)
-        $request.Content.Headers.ContentLength = $Body.Length
-    }
-
     try {
         $response = $Client.SendAsync($request).GetAwaiter().GetResult()
         try {
@@ -185,16 +170,50 @@ function New-MultipartFieldBody {
         [string] $Value
     )
 
-    $boundary = '----ElixFormsBoundary' + [Guid]::NewGuid().ToString('N')
+    $boundary = '---' + [Guid]::NewGuid().ToString('N').Substring(0, 24)
     $newLine = "`r`n"
-    $bodyText = '--{0}{1}Content-Disposition: form-data; name="{2}"{1}{1}{3}{1}--{0}--{1}' -f $boundary, $newLine, $Name, $Value
-    $encoding = [Text.UTF8Encoding]::new($false)
-    $bytes = $encoding.GetBytes($bodyText)
+    $body = '--{0}{1}Content-Disposition: form-data; name="{2}"{1}{1}{3}{1}--{0}--{1}' -f $boundary, $newLine, $Name, $Value
 
     return [pscustomobject]@{
         Boundary    = $boundary
         ContentType = 'multipart/form-data; boundary={0}' -f $boundary
-        Bytes       = $bytes
+        Body        = $body
+    }
+}
+
+function Invoke-ElixFormsSaveRequest {
+    [CmdletBinding()]
+    param(
+        [Parameter(Mandatory)]
+        [Uri] $Uri,
+
+        [Parameter(Mandatory)]
+        [string] $Cookie,
+
+        [Parameter(Mandatory)]
+        [ValidateNotNullOrEmpty()]
+        [string] $ContentType,
+
+        [Parameter(Mandatory)]
+        [ValidateNotNullOrEmpty()]
+        [string] $Body
+    )
+
+    $headers = @{}
+    $headers.Add('Accept', '*/*')
+    $headers.Add('Accept-Encoding', 'gzip, deflate, br, zstd')
+    $headers.Add('Cookie', $Cookie)
+    $headers.Add('x-requested-with', 'XMLHttpRequest')
+    $headers.Add('Content-Type', $ContentType)
+
+    try {
+        $response = Invoke-RestMethod -Uri $Uri -Method POST -Headers $headers -ContentType $ContentType -Body $Body -ErrorAction Stop
+        return [pscustomobject]@{
+            Json = $response
+        }
+    }
+    catch {
+        throw 'Request to {0} failed: {1}' -f $Uri, $_.Exception.Message
     }
 }
 
@@ -630,7 +649,7 @@ function Invoke-ElixFormsMetadataBulkUpdate {
 
             Write-Host ('[{0}/{1}] Updating object {2} (data ID {3})...' -f ($rowIndex + 1), $search.Rows.Count, $objectId, $dataId)
             try {
-                $saveResult = Invoke-ElixFormsRequest -Client $client -Method POST -Uri $saveUri -Cookie $cookie -Body $multipart.Bytes -ContentType $multipart.ContentType
+                $saveResult = Invoke-ElixFormsSaveRequest -Uri $saveUri -Cookie $cookie -ContentType $multipart.ContentType -Body $multipart.Body
                 $errors = @($saveResult.Json.errors.objectList)
                 $savedObjects = @($saveResult.Json.result.objectList)
                 if ($errors.Count -gt 0 -or $savedObjects.Count -eq 0) {