OAuth2 Access Token Fetcher Using OAuthlib

This function uses the OAuthlib library's OAuth2 client and request tools to obtain an access token from an authorization response.

Technology Stack : OAuthlib, requests

Code Type : Function

Code Difficulty : Intermediate

                
                    
def fetch_access_token(client_id, client_secret, token_url, authorization_response):
    from oauthlib.oauth2 import BackendApplicationClient, TokenRequest
    from oauthlib.oauth2 import TokenResponse
    from requests import post

    # Create a backend application client
    client = BackendApplicationClient(client_id=client_id)

    # Create a token request
    token_req = TokenRequest(
        client=client,
        token_url=token_url,
        authorization_response=authorization_response,
        body={'grant_type': 'authorization_code'}
    )

    # Send the token request and get the response
    token_response = TokenResponse(post(token_url, data=token_req.to_dict()))

    # Return the access token from the response
    return token_response.access_token