authform: add an url to test credentials

post a json with post values on /mandaye/check/credentials
and this request will return a json dict with a data entry OK or KO

Closes #6127

mandaye/auth/authform.py

@@ -17,7 +17,7 @@ from mandaye import config, __version__
 from mandaye.exceptions import MandayeException
 from mandaye.log import logger
 from mandaye.http import HTTPHeader, HTTPRequest
-from mandaye.response import _500, _302, _401, json_response, json_error
+from mandaye.response import _500, _302, _401, json_response, json_bad_request
 from mandaye.server import get_response
 
 from mandaye.backends.default import Association
@@ -69,6 +69,13 @@ a password_field key if you want to encode a password.")
 
     def get_default_mapping(self):
         mapping = [
+                {
+                    'path': r'%s$' % self.urls.get('check_credentials', '/mandaye/check/credentials'),
+                    'response': {
+                        'auth': 'check_identifiers',
+                        'method': 'POST',
+                        }
+                    },
                 {
                     'path': r'%s$' % self.urls.get('logout_url', '/mandaye/logout'),
                     'on_response': [{'auth': 'slo'}]
@@ -433,3 +440,48 @@ a password_field key if you want to encode a password.")
             return True
         return False
 
+    def check_credentials(self, env, values, request, response):
+        """
+        This method is designed to be called like a json webservice
+        The http client must make a POST with the following json :
+        {
+            "post_values": {
+                "foo": "bar",
+                "password": "monsecret",
+                "birthdate": "01/01/1970"
+                }
+        }
+        This method will response in json :
+         {"data": "OK|KO", err: 1|0 [,"err_msg": "blabla"]}
+        """
+        try:
+            content = json.loads(request.msg.read())
+        except ValueError:
+            return json_bad_request({
+                "data": "KO",
+                "err": 1,
+                "err_msg": "invalid json"
+                })
+        if not content.has_key('post_values'):
+            return json_bad_request({
+                "data": "KO",
+                "err": 1,
+                "err_msg": "post_values parameter missing"})
+        if not isinstance(content['post_values'], dict):
+            return json_bad_request({
+                "data": "KO",
+                "err": 1,
+                "err_msg": "post_values parameter must be a dictionary"
+                })
+        response = self.replay(env, content['post_values'])
+        if self.replay_condition and eval(self.replay_condition):
+            return json_response({
+                "data": "OK",
+                "err": 0
+                })
+        else:
+            return json_response({
+                "data": "KO",
+                "err": 0
+                })
+