(CkPython) Microsoft Graph OAuth2 Client Credentials Grant Flow

Demonstrates how to get a Microsoft Graph access token using the Client Credentials Grant Flow.

You can use the OAuth 2.0 client credentials grant specified in RFC 6749, sometimes called two-legged OAuth, to access web-hosted resources by using the identity of an application. This type of grant is commonly used for server-to-server interactions that must run in the background, without immediate interaction with a user. These types of applications are often referred to as daemons or service accounts.

For more information, see https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-client-creds-grant-flow

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import sys
import chilkat

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

http = chilkat.CkHttp()

req = chilkat.CkHttpRequest()
req.AddParam("client_secret","CLIENT_SECRET")
req.AddParam("client_id","CLIENT_ID")
# Don't know if the scopes valid for the client credentials grant are different than the scopes for the 3-legged Authorization Code Grant...
req.AddParam("scope","https://graph.microsoft.com/.default")
req.AddParam("grant_type","client_credentials")

# Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
url = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token"
# resp is a CkHttpResponse
resp = http.PostUrlEncoded(url,req)
if (http.get_LastMethodSuccess() != True):
    print(http.lastErrorText())
    sys.exit()

statusCode = resp.get_StatusCode()
print("Response status code = " + str(statusCode))

json = chilkat.CkJsonObject()
json.Load(resp.bodyStr())

json.put_EmitCompact(False)
print(json.emit())

# Sample successful output:

# {
#   "token_type": "Bearer",
#   "expires_in": 3599,
#   "ext_expires_in": 3599,
#   "access_token": "eyJ0eX...K0jOERg"
# }

if (statusCode == 200):
    json.WriteFile("qa_data/tokens/msGraphClientCredentialsToken.json")
    print("Success.")
else:
    print("Failed.")