Parsing json with PowerShell

I try to grab all my host from check_mk with http-api "action=get_all_hosts" the response is json format and look like this:

"{"result": {"some host name": {"attributes": {"tag_Chassis": "Vm", "tag_ServerFamily": "WindowsServer", "tag_criticality": "prod", "tag_Application": "AllApp", "alias": "some alias", "ipaddress": "172.21.x.x", "tag_networking": "lan"}, "hostname": "some host name", "path": "windows"}}"

Now I try to format the response without success. How can I format the result to table with all the properties?

Solution

That JSON you pasted is incorrect. It shouldn't have quotes at the beginning nor at the end. And you're missing one } at the end. You can validate it using any online tool like this.

Once you have the correct JSON which should be:

{"result": {"some host name": {"attributes": {"tag_Chassis": "Vm", "tag_ServerFamily": "WindowsServer", "tag_criticality": "prod", "tag_Application": "AllApp", "alias": "some alias", "ipaddress": "172.21.x.x", "tag_networking": "lan"}, "hostname": "some host name", "path": "windows"}}}

You can access the attributes once you convert them from JSON:

# Convert and save to variable
$convertedJSON = @"
{"result": {"some host name": {"attributes": {"tag_Chassis": "Vm", "tag_ServerFamily": "WindowsServer", "tag_criticality": "prod", "tag_Application": "AllApp", "alias": "some alias", "ipaddress": "172.21.x.x", "tag_networking": "lan"}, "hostname": "some host name", "path": "windows"}}}
"@ | ConvertFrom-Json

# Access attributes
$convertedJSON.result.'some host name'.attributes

# If you don't know the hostname you can find it like this
($convertedJSON.result |Get-Member | ? MemberType -eq "NoteProperty").Name

# List all attributes from your JSON
$convertedJSON.result.$(($convertedJSON.result |Get-Member | ? MemberType -eq "NoteProperty").Name).attributes

# Output will be like this
tag_Chassis      : Vm
tag_ServerFamily : WindowsServer
tag_criticality  : prod
tag_Application  : AllApp
alias            : some alias
ipaddress        : 172.21.x.x
tag_networking   : lan