Cisco DNAC - REST API Call to retrieve token.

[Netmart]

Hello,

For some reason, it appears that I am receiving the response for a token in request in html format indicated by the following error: 

  File "/usr/lib64/python3.9/json/decoder.py", line 355, in raw_decode

    raise JSONDecodeError("Expecting value", s, err.value) from None

json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Below you will find an excerpt of the code:

#!/usr/bin/python

import requests

import json

import urllib3

from requests.auth import HTTPBasicAuth

urllib3.disable_warnings()

my_dna_ctr="sandboxdnac2.cisco.com"

my_user="devnetuser"

my_password="Cisco123!"

tkn_headers={"Content-Type": "application/json"}

my_tkn_uri="https://"+my_dna_ctr+"/dna/system/api/vi/auth/token"

my_tkn_req=requests.post(my_tkn_uri, auth=HTTPBasicAuth(my_user, my_password),headers=tkn_headers,verify=False)

my_access_token=my_tkn_req.json()["Token"]

:

I appreciate any help.

Thanks.

[mfr-6]

hi @Netmart 

First - seems like your URL is wrong. It should be /dna/system/api/v1/auth/token <- there is "v1" instead of "vi".

I tested your script and unfortunately there is a problem with authentication endpoint on dnac. I got response:

{
    "error": "Basic Authorization is not allowed"
}

Seems like sandboxdnac2 has Basic auth disabled, because i tried to authenticate using GUI and Dev Toolkit - i got the same result.

BUT - you can use https://sandboxdnac.cisco.com/ without "2" and this will return you token with no issues so maybe this is the option?

The code with typo fixed:

#!/usr/bin/python
import requests
import json
import urllib3
from requests.auth import HTTPBasicAuth
urllib3.disable_warnings()


my_dna_ctr="sandboxdnac.cisco.com"
my_user="devnetuser"
my_password="Cisco123!"
tkn_headers={"Content-Type": "application/json"}

my_tkn_uri="https://"+my_dna_ctr+"/dna/system/api/v1/auth/token"
my_tkn_req=requests.post(my_tkn_uri, auth=HTTPBasicAuth(my_user, my_password),headers=tkn_headers,verify=False)

my_access_token=my_tkn_req.json()​["Token"]

[Marcel Zehnder]

Also see https://community.cisco.com/t5/devnet-sandbox/unable-to-do-rest-api-s-to-catalyst-centers/m-p/5147187/highlight/true#M10221