(Ruby) RSAP Union API - Get OAuth2 Access Token

Demonstrates how to get an OAuth2 access token for the RSAP Union API. Note: This uses the client credentials flow, which does NOT require an interactive engagement using a browser.

For more information, see https://app.swaggerhub.com/apis-docs/pderas/RSAP/2.0.1#/Authentication/getOauthToken

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

require 'chilkat'

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

http = Chilkat::CkHttp.new()

# The following JSON is sent in the request body.

# {
#   "grant_type": "client_credentials",
#   "client_id": 1234,
#   "client_secret": "23456abcde"
# }

json = Chilkat::CkJsonObject.new()
json.UpdateString("grant_type","client_credentials")
json.UpdateInt("client_id",1234)
json.UpdateString("client_secret","23456abcde")

http.SetRequestHeader("Content-type","application/json")

# Add the client certificate TLS authentication.
cert = Chilkat::CkCert.new()
success = cert.LoadFromFile("qa_data/certs_and_keys/union_client_certificate.crt")
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

privKey = Chilkat::CkPrivateKey.new()
success = privKey.LoadAnyFormatFile("qa_data/certs_and_keys/union_client_certificate.nopass.key","")
if (success == false)
    print privKey.lastErrorText() + "\n";
    exit
end

# Associate the private key with the cert.
# This will fail if the private key is not actually the correct one that corresponds to the public key stored within the cert.
success = cert.SetPrivateKey(privKey)
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

# Tell HTTP to use the cert for client TLS certificate authentication.
success = http.SetSslClientCert(cert)
if (success == false)
    print http.lastErrorText() + "\n";
    exit
end

# resp is a CkHttpResponse
resp = http.PostJson3("https://api-test.rsap.ca/oauth/token","application/json",json)
if (http.get_LastMethodSuccess() == false)
    print http.lastErrorText() + "\n";
    exit
end

sbResponseBody = Chilkat::CkStringBuilder.new()
resp.GetBodySb(sbResponseBody)
jResp = Chilkat::CkJsonObject.new()
jResp.LoadSb(sbResponseBody)
jResp.put_EmitCompact(false)

print "Response Body:" + "\n";
print jResp.emit() + "\n";

respStatusCode = resp.get_StatusCode()
print "Response Status Code = " + respStatusCode.to_s() + "\n";
if (respStatusCode >= 400)
    print "Response Header:" + "\n";
    print resp.header() + "\n";
    print "Failed." + "\n";

    exit
end

# Sample JSON response:
# (Sample code for parsing the JSON response is shown below)

# {
#   "token_type": "Bearer",
#   "expires_in": 3600,
#   "access_token": "eyJ0eXAi...LnE"
# }

# This token expires in 1 hour.  Your application could re-use the same token for up to an hour,
# or it can simply get a new access token before each request (if you're not doing too many requests).
success = jResp.WriteFile("qa_data/tokens/rsapToken.json")