How to parse JSON from the Invoke-WebRequest in PowerShell?

When sending the GET request to the server, which uses self-signed certificate:

add-type @"
using System.Net;
using System.Security.Cryptography.X509Certificates;
public class TrustAllCertsPolicy : ICertificatePolicy {
public bool CheckValidationResult(
ServicePoint srvPoint, X509Certificate certificate,
WebRequest request, int certificateProblem) {
return true;
}
}
"@
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy
$RESPONSE=Invoke-WebRequest -Uri

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-Method GET
echo $RESPONSE


I'm getting following Response:

StatusCode : 200
StatusDescription : OK
Content : {123, 10, 108, 111...}
RawContent : HTTP/1.1 200 OK
Content-Length: 21
Date: Sat, 11 Jun 2016 10:11:03 GMT

{
flag:false
}
Headers : {[Content-Length, 21], [Date, Sat, 11 Jun 2016 10:11:03 GMT]}
RawContentLength : 21

Content contains some wired numbers, so I went after RawContent, how would I parse the JSON inside, ignoring headers? or is there a clean way to get Content from those numbers?

You could replace `Invoke-WebRequest` with `Invoke-RestMethod` which auto-converts json response to a `psobject` so you can use:

$response = Invoke-RestMethod -Uri "https://yadayada:8080/bla"
$response.flag

If you have a need to use `Invoke-WebRequest` over `Invoke-RestMethod` you can convert it to an object by turning it into a string first

$response = Invoke-WebRequest -Uri "https://yadayada:8080/bla"
$jsonObj = ConvertFrom-Json $([String]::new($response.Content))

This way:

$response = Invoke-WebRequest -Uri <your_uri>
if ($response.statuscode -eq '200') {
$keyValue= ConvertFrom-Json $response.Content | Select-Object -expand "<your_key_name>"
}