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MSGraphAPI_utils.ps1
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MSGraphAPI_utils.ps1
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# This script contains utility functions for MSGraph API at https://graph.microsoft.com
# Calls the provisioning SOAP API
function Call-MSGraphAPI
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
[String]$API,
[Parameter(Mandatory=$False)]
[String]$ApiVersion="beta",
[Parameter(Mandatory=$False)]
[String]$Method="GET",
[Parameter(Mandatory=$False)]
$Body,
[Parameter(Mandatory=$False)]
$Headers,
[Parameter(Mandatory=$False)]
[String]$QueryString,
[Parameter(Mandatory=$False)]
[int]$MaxResults=1000
)
Process
{
if($Headers -eq $null)
{
$Headers=@{}
}
$Headers["Authorization"] = "Bearer $AccessToken"
# Create the url
$url = "https://graph.microsoft.com/$($ApiVersion)/$($API)?$(if(![String]::IsNullOrEmpty($QueryString)){"&$QueryString"})"
# Call the API
try
{
$response = Invoke-RestMethod -UseBasicParsing -Uri $url -ContentType "application/json" -Method $Method -Body $Body -Headers $Headers
}
catch
{
$errorMessage = $_.Exception.Message
try
{
$errorResponse = Get-ErrorStreamMessage -errorStream $_.Exception.Response.GetResponseStream() | ConvertFrom-Json
if($errorResponse.error.message)
{
$errorMessage = $errorResponse.error.message
}
}
catch{}
throw $errorMessage
}
# Check if we have more items to fetch
if($response.psobject.properties.name -match '@odata.nextLink')
{
$items=$response.value.count
# Loop until finished or MaxResults reached
while(($url = $response.'@odata.nextLink') -and $items -lt $MaxResults)
{
# Return
$response.value
$response = Invoke-RestMethod -UseBasicParsing -Uri $url -ContentType "application/json" -Method $Method -Body $Body -Headers $Headers
$items+=$response.value.count
}
# Return
$response.value
}
else
{
# Return
if($response.psobject.properties.name -match "Value")
{
return $response.value
}
else
{
return $response
}
}
}
}