First make sure that you have the domain configurations saved as a Python file named settings.py in the same folder as your program. In this recipe, we have included a simple settings.py with the following content as a sample:

    DOMAIN = {'people': {}}

If settings.py is not found, the program will halt with the following error:

eve.exceptions.ConfigException: DOMAIN dictionary missing or wrong.

Listing 11.9 gives a REST server with BasicAuth as follows:

#!/usr/bin/env python 
# Python Network Programming Cookbook, Second Edition
  -- Chapter - 11 
# This program is optimized for Python 2.7.12 and
  Python 3.5.2. 
# It may run on any other version with/without
  modifications. 
 
from eve import Eve 
from eve.auth import BasicAuth 
 
class MyBasicAuth(BasicAuth): 
    def check_auth(self, username, password, allowed_roles,
   resource, 
                   method): 
        return username == 'admin' and password == 'secret' 
 
def run_server(): 
    app = Eve(auth=MyBasicAuth) 
    app.run() 
        
if __name__ == '__main__': 
    run_server() 

We run the server with the username admin and password secret.

$ python 11_9_eve_basic_auth.py 
  * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

Assuming username admin and password secret, to retrieve the base64 encoded string of this credentials, you may use the following command:

$ echo -n admin:secret | base64
YWRtaW46c2VjcmV0

Now we run the client with the correct base64 encoded secret:

$ curl -H "Authorization: Basic YWRtaW46c2VjcmV0" -i http://127.0.0.1:5000
$ curl -H "Authorization: Basic YWRtaW46c2VjcmV0" -i http://127.0.0.1:5000
HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 62
Server: Eve/0.7.4 Werkzeug/0.11.15 Python/2.7.12
Date: Sat, 29 Jul 2017 12:10:04 GMT
    
{"_links": {"child": [{"href": "people", "title": "people"}]}}

If you run curl with no credentials, the following output will be produced:

$ curl -i http://127.0.0.1:5000
HTTP/1.0 401 UNAUTHORIZED
Content-Type: application/json
Content-Length: 91
WWW-Authenticate: Basic realm="eve"
Server: Eve/0.7.4 Werkzeug/0.11.15 Python/2.7.12
Date: Sat, 29 Jul 2017 12:09:02 GMT
    
{"_status": "ERR", "_error": {"message": "Please provide proper credentials", "code": 401}}

The server will bring the following log to indicate the failed attempt:

127.0.0.1 - - [29/Jul/2017 14:09:02] "GET / HTTP/1.1" 401 -

The output for an attempt with wrong credentials would be similar to the preceding ones with no credentials:

curl -H "Authorization: Basic YV1" -i http://127.0.0.1:5000