(PowerShell) Read/Write JSON with Binary Data such as JPEG Files

Demonstrates how binary files could be stored in JSON in base64 format. Creates JSON containing the contents of a JPG file, and then reads the JSON to extract the JPEG image.

Chilkat .NET Downloads Chilkat .NET Assemblies

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

# First load a small JPG file..
$bd = New-Object Chilkat.BinData

$success = $bd.LoadFile("qa_data/jpg/starfish20.jpg")
# Assume success, but your code should check for success..

# Create JSON containing the binary data in base64 format.
$json1 = New-Object Chilkat.JsonObject
$json1.UpdateBd("starfish","base64",$bd)

$jsonStr = $json1.Emit()
$($jsonStr)

# Here's the output:
# {"starfish":"/9j/4AAQSkZJRgA ... cN2iuLFsCEbDGxQkI6RO/n//2Q=="}

# Let's create a new JSON object, load it with the above JSON, and extract the JPG image..
$json2 = New-Object Chilkat.JsonObject
$json2.Load($jsonStr)

# Get the binary bytes.
$bd2 = New-Object Chilkat.BinData
$json2.BytesOf("starfish","base64",$bd2)

# Save to a file.
$success = $bd2.WriteFile("qa_output/starfish20.jpg")

$("Success.")