(Ruby) ABN AMRO OAuth2 Client Credentials Authentication

Demonstrates how to obtain an access token for an ABN AMRO online API using OAuth2 with the Client Credentials flow.

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://developer.abnamro.com/api/payment-initiation-v1/payment-initiation-tutorial

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require 'chilkat'

success = false

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

# This example sends the following CURL request:

# 	curl -X POST -k https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2 \
# 	-v \
# 	--cert TPPCertificate.crt \
# 	--key TPPprivateKey.key \
# 	-H 'Cache-Control: no-cache' \
# 	-H 'Content-Type: application/x-www-form-urlencoded' \
# 	-d 'grant_type=client_credentials&client_id=TPP_test&scope=psd2:payment:sepa:write psd2:payment:sepa:read'

cert = Chilkat::CkCert.new()
success = cert.LoadFromFile("qa_data/certs/TPPCertificate.cer")
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

bdKey = Chilkat::CkBinData.new()
success = bdKey.LoadFile("qa_data/certs/TPPprivateKey.key")

privKey = Chilkat::CkPrivateKey.new()
success = privKey.LoadAnyFormat(bdKey,"passwordIfNeeded")
if (success == false)
    print privKey.lastErrorText() + "\n";
    exit
end

success = cert.SetPrivateKey(privKey)
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

http = Chilkat::CkHttp.new()

success = http.SetSslClientCert(cert)
if (success == false)
    print http.lastErrorText() + "\n";
    exit
end

req = Chilkat::CkHttpRequest.new()
req.AddParam("grant_type","client_credentials")
req.AddParam("client_id","TPP_test")
req.AddParam("scope","psd2:payment:sepa:write psd2:payment:sepa:read")

req.put_HttpVerb("POST")
req.put_ContentType("application/x-www-form-urlencoded")

resp = Chilkat::CkHttpResponse.new()
success = http.HttpReq("https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2",req,resp)
if (success == false)
    print http.lastErrorText() + "\n";
    exit
end

if (resp.get_StatusCode() != 200)
    print resp.bodyStr() + "\n";
    exit
end

# Get the JSON result:
# {"access_token":"TIhycwl8rfrZPkXGw15mwldASAAK","token_type":"Bearer","expires_in":7200}
json = Chilkat::CkJsonObject.new()
json.Load(resp.bodyStr())
print "access_token: " + json.stringOf("access_token") + "\n";
print "token_type: " + json.stringOf("token_type") + "\n";
print "expires_in: " + json.stringOf("expires_in") + "\n";