(PowerShell) Paging User Photos with Cursor

Demonstrates how to iterate over the pages of user photos using a cursor.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# This example assumes a previously obtained an access token
$oauth2 = New-Object Chilkat.OAuth2
$oauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN"

$rest = New-Object Chilkat.Rest

# Connect to Facebook.
$success = $rest.Connect("graph.facebook.com",443,$true,$true)
if ($success -ne $true) {
    $($rest.LastErrorText)
    exit
}

# Provide the authentication credentials (i.e. the access key)
$rest.SetAuthOAuth2($oauth2)

# Indicate that we only want the photos the user has personally uploaded.
$rest.AddQueryParam("type","uploaded")

# We could limit the number of photos per page using the "limit" field.
$rest.AddQueryParam("limit","20")

# Get the 1st page of photos. (Not the actual image data, but the information about each photo.)
# See https://developers.facebook.com/docs/graph-api/reference/user/photos/ for more information.
$responseJson = $rest.FullRequestNoBody("GET","/v2.7/me/photos")
if ($rest.LastMethodSuccess -ne $true) {
    $($rest.LastErrorText)
    exit
}

$json = New-Object Chilkat.JsonObject
$json.EmitCompact = $false
$json.Load($responseJson)
$($json.Emit())

# 
# See Parsing the Facebook User Photos for code showing how to parse the JSON photos content.
# 

# Get the "after" cursor.
$afterCursor = $json.StringOf("paging.cursors.after")
while ($json.LastMethodSuccess -eq $true) {

    $("after cursor: " + $afterCursor)

    # Prepare for getting the next page of photos.
    # We can continue using the same REST object.
    # If already connected, we'll continue using the existing connection.
    # Otherwise, a new connection will automatically be made if needed.
    $rest.ClearAllQueryParams()
    $rest.AddQueryParam("type","uploaded")
    $rest.AddQueryParam("limit","20")
    $rest.AddQueryParam("after",$afterCursor)

    $responseJson = $rest.FullRequestNoBody("GET","/v2.7/me/photos")
    if ($rest.LastMethodSuccess -ne $true) {
        $($rest.LastErrorText)
        exit
    }

    $json.Load($responseJson)
    # See Parsing the Facebook User Photos for code showing how to parse the JSON photos content.

    $($json.Emit())

    # Get the cursor for the next page.
    $afterCursor = $json.StringOf("paging.cursors.after")
}

$("No more pages of photos.")