[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/protorpc/demos/appstats/protorpc_appstats/main.py

Index: third_party/gsutil/third_party/protorpc/demos/appstats/protorpc_appstats/main.py
diff --git a/third_party/gsutil/third_party/protorpc/demos/appstats/protorpc_appstats/main.py b/third_party/gsutil/third_party/protorpc/demos/appstats/protorpc_appstats/main.py
new file mode 100755
index 0000000000000000000000000000000000000000..8e9ea1f1131db77d6f3a64759c73334864c658e3
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+++ b/third_party/gsutil/third_party/protorpc/demos/appstats/protorpc_appstats/main.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+#
+# Copyright 2010 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import os
+import re
+
+from google.appengine.ext import webapp
+from google.appengine.ext.webapp import util
+
+from protorpc.webapp import service_handlers
+
+import protorpc_appstats
+
+# This regular expression is used to extract the full path of
+# an incoming request so that the service can be correctly
+# registered with its internal registry.  The only assumption
+# that is made about the placement of the appstats service by
+# this main module is that the last element of the service path
+# is 'service'.
+_METHOD_REGEX = r'\.[^/]+'
+_SERVICE_PATH_REGEX = re.compile(r'(.*)/service(%s|/protorpc(%s)?)?' %
+                                 (_METHOD_REGEX, _METHOD_REGEX))
+
+
+def parse_service_path(path_info):
+  """Parse the service path from PATH_INFO in the environment.
+
+  The appstats service may be placed at any URL path within a webapp
+  application.  It isn't possible to know what the actual path is
+  until the actual request time.  This function attempts to parse
+  the incoming request to determine where the appstats service is
+  configured.  If it can successfully determine its location, it
+  will attempt to map protorpc RegistryService underneath its service
+  path.
+
+  The appstats service is always expected to be <path>/service.  The
+  RegistryService is mapped to <path>/service/protorpc.
+
+  Args:
+    path_info: PATH_INFO extracted from the CGI environment.
+
+  Returns:
+    A pair paths (appstats_service_path, registry_service_path):
+      appstats_service_path: The full path of the appstats service.  If the
+        full path cannot be determined this will be '.*/service'.
+      registry_service_path: The full path of the appstats registry service.
+        If the path of the appstats service cannot be determined this will be
+        None.
+  """
+  match = _SERVICE_PATH_REGEX.match(path_info)
+  if match:
+    appstats_service_path = '%s/service' % (match.group(1),)
+    # Creates a "local" registry service.
+    registry_service_path = '%s/protorpc' % (appstats_service_path,)
+  else:
+    # Not possible to determine full service name for registry.  Do
+    # not create registry for service.
+    appstats_service_path = '.*/service'
+    registry_service_path = None
+  return appstats_service_path, registry_service_path
+
+
+def main():
+  path_info = os.environ.get('PATH_INFO', '')
+  service_path, registry_path = parse_service_path(path_info)
+
+  # Create webapp URL mappings for service and private registry.
+  mapping = service_handlers.service_mapping(
+    [(service_path, protorpc_appstats.AppStatsService)], registry_path)
+
+  application = webapp.WSGIApplication(mapping)
+  util.run_wsgi_app(application)
+
+
+if __name__ == '__main__':
+  main()