Add SSL cert and key validation

util/config/provider.py

@@ -2,6 +2,7 @@ import os
 import yaml
 import logging
 import json
+from StringIO import StringIO
 
 logger = logging.getLogger(__name__)
 
@@ -55,6 +56,10 @@ class BaseProvider(object):
     """ Returns whether the file with the given name exists under the config override volume. """
     raise NotImplementedError
 
+  def get_volume_file(self, filename, mode='r'):
+    """ Returns a Python file referring to the given name under the config override volumne. """
+    raise NotImplementedError
+
   def save_volume_file(self, filename, flask_file):
     """ Saves the given flask file to the config override volume, with the given
         filename.
@@ -107,6 +112,9 @@ class FileConfigProvider(BaseProvider):
   def volume_file_exists(self, filename):
     return os.path.exists(os.path.join(self.config_volume, filename))
 
+  def get_volume_file(self, filename, mode='r'):
+    return open(os.path.join(self.config_volume, filename), mode)
+
   def save_volume_file(self, filename, flask_file):
     flask_file.save(os.path.join(self.config_volume, filename))
 
@@ -152,6 +160,9 @@ class TestConfigProvider(BaseProvider):
   def save_volume_file(self, filename, flask_file):
     self.files[filename] = ''
 
+  def get_volume_file(self, filename, mode='r'):
+    return StringIO(self.files[filename])
+
   def requires_restart(self, app_config):
     return False