(CkPython) 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

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import sys
import chilkat

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

http = chilkat.CkHttp()

# The following JSON is sent in the request body.

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

json = chilkat.CkJsonObject()
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()
success = cert.LoadFromFile("qa_data/certs_and_keys/union_client_certificate.crt")
if (success == False):
    print(cert.lastErrorText())
    sys.exit()

privKey = chilkat.CkPrivateKey()
success = privKey.LoadAnyFormatFile("qa_data/certs_and_keys/union_client_certificate.nopass.key","")
if (success == False):
    print(privKey.lastErrorText())
    sys.exit()

# 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())
    sys.exit()

# Tell HTTP to use the cert for client TLS certificate authentication.
success = http.SetSslClientCert(cert)
if (success == False):
    print(http.lastErrorText())
    sys.exit()

# 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())
    sys.exit()

sbResponseBody = chilkat.CkStringBuilder()
resp.GetBodySb(sbResponseBody)
jResp = chilkat.CkJsonObject()
jResp.LoadSb(sbResponseBody)
jResp.put_EmitCompact(False)

print("Response Body:")
print(jResp.emit())

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

    sys.exit()

# 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")