(PowerShell) S3 Get Bucket Objects with CommonPrefixes

Demonstrates how to get a list of bucket objects using the prefix and delimiter query params to get an XML result with CommonPrefixes.

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

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

$http = New-Object Chilkat.Http

# Insert your access key here:
$http.AwsAccessKey = "AWS_ACCESS_KEY"

# Insert your secret key here:
$http.AwsSecretKey = "AWS_SECRET_KEY"

# In this example, my bucket is "chilkat100".
# It contains a number of folders, one of which is named "images".
# I want to get a list of all sub-folders under the "images" folder
$strXml = $http.S3_ListBucketObjects("chilkat100?prefix=images/&delimiter=/")
if ($http.LastMethodSuccess -ne $true) {
    $($http.LastErrorText)
    exit
}

$("Response status code = " + $http.LastStatus)

$xml = New-Object Chilkat.Xml
$success = $xml.LoadXml($strXml)
if ($success -ne $true) {
    $($xml.LastErrorText)
    exit
}

# If the response status code was not 200, then the XML response is not a 
# listing of objects, but instead contains error information.
if ($http.LastStatus -ne 200) {
    $($xml.GetXml())
    $("Failed.")
    exit
}

# A sample response is shown below.
$($xml.GetXml())
$("----")

# Here is the list of sub-folders (i.e. CommonPrefixes)

# <?xml version="1.0" encoding="UTF-8"?>
# <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
#     <Name>chilkat100</Name>
#     <Prefix>images/</Prefix>
#     <Marker/>
#     <MaxKeys>1000</MaxKeys>
#     <Delimiter>/</Delimiter>
#     <IsTruncated>false</IsTruncated>
#     <CommonPrefixes>
#         <Prefix>images/africa/</Prefix>
#     </CommonPrefixes>
#     <CommonPrefixes>
#         <Prefix>images/sea_creatures/</Prefix>
#     </CommonPrefixes>
# </ListBucketResult>

# The XML can be parsed like this:
$i = 0
$count_i = $xml.NumChildrenHavingTag("CommonPrefixes")
while ($i -lt $count_i) {
    $xml.I = $i
    $Prefix = $xml.GetChildContent("CommonPrefixes[i]|Prefix")
    $("Prefix = " + $Prefix)
    $i = $i + 1
}