(PowerShell) SharePoint List Document Libraries

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This example shows how to use Chilkat's HttpCurl class to list the document libraries in a SharePoint site. In Microsoft Graph, SharePoint document libraries are represented as drives. The example demonstrates how HttpCurl can automatically resolve a SharePoint site name to its Microsoft Graph site ID, then use that ID to retrieve and display the site's document libraries.

Note: This example requires Chilkat v11.5.0 or greater.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

# This example retrieves the document libraries for a SharePoint site.
# 
# In Microsoft Graph terminology, a document library is represented as a "drive".
# The example demonstrates how HttpCurl can automatically resolve a SharePoint
# site name to a site ID before requesting the site's document libraries.

$success = $false

# --------------------------------------------------------------------------------------------------------
# Before running this example, create an Azure App Registration and grant it
# the Microsoft Graph permissions required to access SharePoint.
# 
# The application will authenticate using OAuth2 Client Credentials.
# See:
# How to Create SharePoint App Registration for OAuth 2.0 Client Credentials
# --------------------------------------------------------------------------------------------------------

# Build a JSON authentication configuration.
# HttpCurl will use this information to automatically obtain OAuth2 access tokens.
$jsonAuth = New-Object Chilkat.JsonObject

# Enable secret lookup.
# 
# Instead of hard-coding sensitive values such as the client ID,
# client secret, and token endpoint, secret specification strings
# are used.  Chilkat automatically retrieves the actual values from
# Windows Credential Manager (Windows) or Apple Keychain (macOS).
# 
# See:
# Secret Specification Strings
$jsonAuth.EnableSecrets = $true

$success = $jsonAuth.UpdateString("oauth2.client_id","!!sharepoint|oauth2|client_id")
if ($success -eq $true) {
    $success = $jsonAuth.UpdateString("oauth2.client_secret","!!sharepoint|oauth2|client_secret")
}

if ($success -eq $true) {
    $success = $jsonAuth.UpdateString("oauth2.token_endpoint","!!sharepoint|oauth2|token_endpoint")
}

if ($success -eq $false) {
    $($jsonAuth.LastErrorText)
    exit
}

# Request Microsoft Graph permissions that were granted to the application.
$jsonAuth.UpdateString("oauth2.scope","https://graph.microsoft.com/.default")

# ---------------------------------------------------------------------------------------------------

$curl = New-Object Chilkat.HttpCurl

# Associate the OAuth2 configuration with HttpCurl.
# 
# When the request is executed, Chilkat automatically obtains an access token
# if needed and adds the Authorization: Bearer header to the HTTP request.
$curl.SetAuth($jsonAuth)

# Define variables whose values are already known.
# 
# These variables are referenced in the curl command using
# {{variable_name}} substitution syntax.
$curl.SetVar("sharepoint_hostname","example.sharepoint.com")
$curl.SetVar("site_name","test")

# The document libraries endpoint requires a Microsoft Graph site ID.
# 
# Because the application only knows the SharePoint site name,
# HttpCurl must first retrieve the corresponding site ID.
# 
# Define a function that can resolve the site_id variable when needed.
# HttpCurl may execute this function automatically if it determines that
# site_id is required by another request.
$curl.AddFunction("getSite","GET https://graph.microsoft.com/v1.0/sites/root:/sites/{{site_name}}")

# Extract the "id" field from the getSite response and store it
# in the HttpCurl variable named "site_id".
# 
# Any later request that references {{site_id}} can use this value.
$curl.AddOutput("getSite","id","site_id")

# The target Microsoft Graph request:
# 
# curl -X GET \"https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives
# 
# This request returns the document libraries belonging to the site.
# 
# Microsoft Graph refers to document libraries as "drives",
# so each object in the response represents one document library.
# 
# No Authorization header is included because HttpCurl automatically
# adds it when OAuth2 authentication is configured.
$curlCommand = "curl -X GET `"https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives`""

# Execute the request.
# 
# HttpCurl examines the target curl command and determines that
# the variable {{site_id}} is required.
# 
# Because site_id is not yet known, HttpCurl searches for a function
# capable of producing it.  The getSite function provides the "id"
# output, which is mapped to the site_id variable.
# 
# The execution plan becomes:
# 
#   1) Execute getSite to obtain site_id.
#   2) Substitute {{site_id}} into the target request.
#   3) Execute the drives request.
# 
# The final HTTP response returned by DoYourThing is always the
# response from the target curl command, which is the last step in the plan.
$success = $curl.DoYourThing($curlCommand)
if ($success -eq $false) {
    $($curl.LastErrorText)
    exit
}

# A successful Graph response should return HTTP 200.
# Any other status code typically indicates an authentication,
# permission, or resource lookup error.
$statusCode = $curl.StatusCode
if ($statusCode -ne 200) {
    $($curl.ResponseBodyStr)
    $("status code = " + $statusCode)
    exit
}

# The response body contains a JSON array named "value".
# Each element of the array describes a SharePoint document library.
$json = New-Object Chilkat.JsonObject
$json.EmitCompact = $false
$curl.GetResponseJson($json)
$($json.Emit())

# Iterate over the document libraries returned by Microsoft Graph
# and display selected properties for each library.
$i = 0
$numDrives = $json.SizeOfArray("value")
while ($i -lt $numDrives) {
    $json.I = $i
    $("name: " + $json.StringOf("value[i].name"))
    $("description: " + $json.StringOf("value[i].description"))
    $("id: " + $json.StringOf("value[i].id"))
    $("webUrl: " + $json.StringOf("value[i].webUrl"))
    $("displayName: " + $json.StringOf("value[i].createdBy.user.displayName"))
    $("-")
    $i = $i + 1
}

$("Success.")