Add infra_libs as a bootstrap dependency.

infra_libs/ts_mon/common/http_metrics.py

-# Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-from infra_libs.ts_mon.common import metrics
-
-
-# Extending HTTP status codes to client-side errors and timeouts.
-STATUS_OK = 200
-STATUS_ERROR = 901
-STATUS_TIMEOUT = 902
-STATUS_EXCEPTION = 909
-
-
-request_bytes = metrics.CumulativeDistributionMetric('http/request_bytes',
-    description='Bytes sent per http request (body only).')
-response_bytes = metrics.CumulativeDistributionMetric('http/response_bytes',
-    description='Bytes received per http request (content only).')
-durations = metrics.CumulativeDistributionMetric('http/durations',
-    description='Time elapsed between sending a request and getting a'
-                ' response (including parsing) in milliseconds.')
-response_status = metrics.CounterMetric('http/response_status',
-    description='Number of responses received by HTTP status code.')
-
-
-server_request_bytes = metrics.CumulativeDistributionMetric(
-    'http/server_request_bytes',
-    description='Bytes received per http request (body only).')
-server_response_bytes = metrics.CumulativeDistributionMetric(
-    'http/server_response_bytes',
-    description='Bytes sent per http request (content only).')
-server_durations = metrics.CumulativeDistributionMetric('http/server_durations',
-    description='Time elapsed between receiving a request and sending a'
-                ' response (including parsing) in milliseconds.')
-server_response_status = metrics.CounterMetric('http/server_response_status',
-    description='Number of responses sent by HTTP status code.')
-
-
-def update_http_server_metrics(endpoint_name, response_status_code, elapsed_ms,
-                               request_size=None, response_size=None,
-                               user_agent=None):
-  fields = {'status': response_status_code, 'name': endpoint_name,
-            'is_robot': False}
-  if user_agent is not None:
-    # We must not log user agents, but we can store whether or not the
-    # user agent string indicates that the requester was a Google bot.
-    fields['is_robot'] = (
-        'GoogleBot' in user_agent or
-        'GoogleSecurityScanner' in user_agent or
-        user_agent == 'B3M/prober')
-
-  server_durations.add(elapsed_ms, fields=fields)
-  server_response_status.increment(fields=fields)
-  if request_size is not None:
-    server_request_bytes.add(request_size, fields=fields)
-  if response_size is not None:
-    server_response_bytes.add(response_size, fields=fields)