kraken-image-optimizer-and-azure-blob-storage

kraken-image-optimizer-and-azure-blob-storage.ps1

# Azure details
$storageAccount = "storageAccount"
$storageKey = "storageKey"
$container_name = "blob container name"

# Kraken details 
$uri = "https://api.kraken.io/v1/url"
$api_key = "kraken api key"
$api_secret = "kraken api secret"
$content_type_supported = "image/png", "image/gif", "image/jpeg"

# store images and log locally
$local_storage = "D:\Dev\images\"
$local_storage_backup = ($local_storage + "backup\")
$logfile = ($local_storage + "kraken.log")

# Backup images
New-Item -ItemType directory -Path $local_storage_backup -Force

$context = New-AzureStorageContext  –StorageAccountName $storageAccount -StorageAccountKey $storageKey -Protocol Http

Get-AzureStorageBlob -Context $context -Container $container_name |
ForEach-Object {
    # Proceed if supported by Kraken
    If ($content_type_supported -contains $_.ContentType.ToLower())
    {
        $url = $context.BlobEndPoint + $container_name + "/" + $_.Name

        $json = "
        {
          ""auth"": {
            ""api_key"": ""$api_key"",
            ""api_secret"": ""$api_secret""
          },
          ""url"": ""$url"",
          ""wait"": true
        }"

        $kraken_response = $null

        Try
        {
             $kraken_response = Invoke-RestMethod -Uri $uri -Method Post -ContentType "application/json" -Body $json 
        }
        Catch [system.exception]
        {
            Add-content $Logfile -value ("Error processing " + $url)
        }

        # Only if kraken is smaller
        if ($kraken_response -ne $null -and  $kraken_response.saved_bytes -gt 0)
        {
            Add-content $Logfile -value  ($url + " " + $kraken_response.saved_bytes)

            $wc = New-Object System.Net.WebClient
            $fileName = [System.IO.Path]::GetFileName($url)

            # Download the version created by kranen
            $wc.DownloadFile($kraken_response.kraked_url, $local_storage + $fileName)

            # Backup the old file, just in case
            $wc.DownloadFile($url, $local_storage_backup + $fileName)

            # Update Azure Blob 
            Try
            {
             Set-AzureStorageBlobContent -File ($local_storage + $fileName) -Blob $_.Name -Container $container_name -Context $context -Force 
            }
            Catch [system.exception]
            {
                Add-content $Logfile -value ("Error updating " + $url)
            }
        }
    }
}