Add a security scanner api config object for params

Change SecScanAPI to use a uri creation func instead of test context

Pass config provider through validator context

Remove app config dependency for validators

util/secscan/api.py

@@ -7,16 +7,12 @@ from urlparse import urljoin
 
 import requests
 
-from flask import url_for
-
 from data.database import CloseForLongOperation
 from data import model
 from data.model.storage import get_storage_locations
-from util import get_app_url, slash_join
 from util.abchelpers import nooper
 from util.failover import failover, FailoverException
 from util.secscan.validator import SecurityConfigValidator
-from util.security.instancekeys import InstanceKeys, instance_keys_context_from_app_config
 from util.security.registry_jwt import generate_bearer_token, build_context_and_subject
 
 from _init import CONF_DIR
@@ -70,16 +66,16 @@ def compute_layer_id(layer):
 
 class SecurityScannerAPI(object):
   """ Helper class for talking to the Security Scan service (usually Clair). """
-  def __init__(self, app, config, storage, client=None, skip_validation=False):
+  def __init__(self, config, storage, server_hostname=None, client=None, skip_validation=False, uri_creator=None, instance_keys=None):
     feature_enabled = config.get('FEATURE_SECURITY_SCANNER', False)
     has_valid_config = skip_validation
 
     if not skip_validation and feature_enabled:
-      config_validator = SecurityConfigValidator(config)
+      config_validator = SecurityConfigValidator(feature_enabled, config.get('SECURITY_SCANNER_ENDPOINT'))
       has_valid_config = config_validator.valid()
 
     if feature_enabled and has_valid_config:
-      self.state = ImplementedSecurityScannerAPI(app, config, storage, client=client)
+      self.state = ImplementedSecurityScannerAPI(config, storage, server_hostname, client=client, uri_creator=uri_creator, instance_keys=instance_keys)
     else:
       self.state = NoopSecurityScannerAPI()
 
@@ -150,20 +146,25 @@ class NoopSecurityScannerAPI(SecurityScannerAPIInterface):
 
 class ImplementedSecurityScannerAPI(SecurityScannerAPIInterface):
   """ Helper class for talking to the Security Scan service (Clair). """
-  def __init__(self, app_config, config, storage, client=None):
-    self._app_config = app_config
+  # TODO(sam) refactor this to not take an app config, and instead just the things it needs as a config object
+  def __init__(self, config, storage, server_hostname, client=None, uri_creator=None, instance_keys=None):
     self._config = config
-    self._instance_keys = InstanceKeys(instance_keys_context_from_app_config(app_config))
-    self._client = client or config['HTTPCLIENT']
+    self._instance_keys = instance_keys
+    self._client = client
     self._storage = storage
+    self._server_hostname = server_hostname
     self._default_storage_locations = config['DISTRIBUTED_STORAGE_PREFERENCE']
     self._target_version = config.get('SECURITY_SCANNER_ENGINE_VERSION_TARGET', 2)
+    self._uri_creator = uri_creator
 
   def _get_image_url_and_auth(self, image):
     """ Returns a tuple of the url and the auth header value that must be used
         to fetch the layer data itself. If the image can't be addressed, we return
         None.
     """
+    if self._instance_keys is None:
+      raise Exception('No Instance keys provided to Security Scanner API')
+
     path = model.storage.get_layer_path(image.storage)
     locations = self._default_storage_locations
 
@@ -183,7 +184,7 @@ class ImplementedSecurityScannerAPI(SecurityScannerAPIInterface):
       repository_and_namespace = '/'.join([namespace_name, repo_name])
 
       # Generate the JWT which will authorize this
-      audience = self._app_config['SERVER_HOSTNAME']
+      audience = self._server_hostname
       context, subject = build_context_and_subject()
       access = [{
         'type': 'repository',
@@ -195,10 +196,7 @@ class ImplementedSecurityScannerAPI(SecurityScannerAPIInterface):
                                          TOKEN_VALIDITY_LIFETIME_S, self._instance_keys)
       auth_header = 'Bearer ' + auth_token
 
-      with self._app.test_request_context('/'):
-        relative_layer_url = url_for('v2.download_blob', repository=repository_and_namespace,
-                                     digest=image.storage.content_checksum)
-      uri = urljoin(get_app_url(self._config), relative_layer_url)
+      uri = self._uri_creator(repository_and_namespace, image.storage.content_checksum)
 
     return uri, auth_header