Need to get required http post - api

Question

I am following Huddle Api instructions to get the Access Token. I am using powershell to post the method which is as follows:
POST /token HTTP/1.1
Host: login.huddle.net
Content-Type: application/x-www-form-urlencoded
grant_type=authorization_code&client_id=s6BhdRkqt&redirect_uri=MyAppServer.com/receiveAuthCode&code=i1WsRn1uB1
Powershell Command which I am using is:
$body = { '#grant_type' = 'authorization_code'; client_id = 'xxxxx';
redirect_uri = 'myAppServer.com'; code = '123abcdef' }
Invoke-WebRequest -Uri "login.huddle.com" -ContentType "application/x-www-form-urlencoded" -Method Post
This works and I get the response of "200 OK" and also shows the activation of Access Token. How would I retrieve the Access Token number. For example, I need the output as they mentioned in instruction which is:
HTTP/1.1 200 OK
Content-Type: application/json
Cache-Control: no-store
{
"access_token":"S1AV32hkKG",
"expires_in":300,
"refresh_token":"8xLOxBtZp8"
}
I think it has something to do ContentType. So I did try, "application/Json" but that was not it. Any suggestions?

Answer 1

You're using the wrong cmdlet. Since you mentiond getting back values for StatusCode, Content, RawContent, etc, that tells us that you're using Invoke-WebRequest. This cmdlets awesome...but not for working with APIs, which are commonly REST formatted and use JSON. IWR can handle the request but you have to dig into the $Response.Content and convert from JSON.
Instead of Invoke-WebRequest, try using Invoke-RestMethod. It's likely that you are getting the AccessCode returned, but as a JSON formatted property. Invoke-RestMethod will natively parse and convert JSON into PowerShell objects. You can just sub it in for Invoke-WebRequest and it should just work.
Invoke-RestMethod -Uri "login.huddle.com" -ContentType "application/x-www-form-urlencoded" -Method Post -body $body

Answer 2

If you use Invoke-RestMethod you can set the response when making the call
$response = Invoke-RestMethod -Uri "login.huddle.com" -ContentType "application/x-www-form-urlencoded" -Method Post"
then $response.access_token or $response.expires_in or $response.refresh_token