(Ruby) Azure REST API Access Token

Demonstrates how to request an Azure REST API OAUTH2 access token.

Note: In order to access resources a Service Principal needs to be created in your Tenant. It is really convenient to do it via AZ CLI:

az ad sp create-for-rbac --name [APP_NAME] --password [CLIENT_SECRET]

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

rest = Chilkat::CkRest.new()

# URL: https://login.microsoftonline.com/TENANT_ID/oauth2/token
bTls = true
port = 443
bAutoReconnect = true
success = rest.Connect("login.microsoftonline.com",port,bTls,bAutoReconnect)
if (success != true)
    print "ConnectFailReason: " + rest.get_ConnectFailReason().to_s() + "\n";
    print rest.lastErrorText() + "\n";
    exit
end

# Add query params to the request.
rest.AddQueryParam("grant_type","client_credentials")
rest.AddQueryParam("client_id","APP_ID")
rest.AddQueryParam("client_secret","CLIENT_SECRET")
rest.AddQueryParam("resource","https://management.azure.com/")

strResponseBody = rest.fullRequestFormUrlEncoded("POST","/TENANT_ID/oauth2/token")
if (rest.get_LastMethodSuccess() != true)
    print rest.lastErrorText() + "\n";
    exit
end

respStatusCode = rest.get_ResponseStatusCode()
if (respStatusCode >= 400)
    print "Response Status Code = " + respStatusCode.to_s() + "\n";
    print "Response Header:" + "\n";
    print rest.responseHeader() + "\n";
    print "Response Body:" + "\n";
    print strResponseBody + "\n";
    exit
end

json = Chilkat::CkJsonObject.new()
json.Load(strResponseBody)
json.put_EmitCompact(false)
print json.emit() + "\n";

# The result is an access token such as the following:

# {
#   "token_type": "Bearer",
#   "expires_in": "3600",
#   "ext_expires_in": "3600",
#   "expires_on": "1557864616",
#   "not_before": "1557860716",
#   "resource": "https://management.azure.com/",
#   "access_token": "eyJ0eXAiOiJKV1QiL ... 20UFDDOHEyUg"
# }

# We'll save this JSON to a file for other examples to use..
json.WriteFile("qa_data/tokens/azureToken.json")