author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Sun, 06 Sep 2009 23:31:53 +0200 | |
changeset 2864 | 2e0b0af889be |
permissions | -rwxr-xr-x |
2864
2e0b0af889be
Update Google App Engine from 1.2.3 to 1.2.5 in thirdparty folder.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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1 |
#!/usr/bin/env python |
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Update Google App Engine from 1.2.3 to 1.2.5 in thirdparty folder.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# |
2e0b0af889be
Update Google App Engine from 1.2.3 to 1.2.5 in thirdparty folder.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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3 |
# Copyright 2007 Google Inc. |
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Update Google App Engine from 1.2.3 to 1.2.5 in thirdparty folder.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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4 |
# |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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5 |
# Licensed under the Apache License, Version 2.0 (the "License"); |
2e0b0af889be
Update Google App Engine from 1.2.3 to 1.2.5 in thirdparty folder.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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6 |
# you may not use this file except in compliance with the License. |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# You may obtain a copy of the License at |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# http://www.apache.org/licenses/LICENSE-2.0 |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# Unless required by applicable law or agreed to in writing, software |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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# distributed under the License is distributed on an "AS IS" BASIS, |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# limitations under the License. |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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# |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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|
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"""A logging handler that records information about unique exceptions. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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'Unique' in this case is defined as a given (exception class, location) tuple. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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Unique exceptions are logged to the datastore with an example stacktrace and an |
2e0b0af889be
Update Google App Engine from 1.2.3 to 1.2.5 in thirdparty folder.
Pawel Solyga <Pawel.Solyga@gmail.com>
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approximate count of occurrences, grouped by day and application version. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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A cron handler, in google.appengine.ext.ereporter.report_generator, constructs |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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and emails a report based on the previous day's exceptions. |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Example usage: |
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parents:
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2e0b0af889be
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parents:
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In your handler script(s), add: |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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import logging |
2e0b0af889be
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from google.appengine.ext import ereporter |
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2e0b0af889be
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ereporter.register_logger() |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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parents:
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In your app.yaml, add: |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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handlers: |
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Pawel Solyga <Pawel.Solyga@gmail.com>
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- url: /_ereporter/.* |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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script: $PYTHON_LIB/google/appengine/ext/ereporter/report_generator.py |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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login: admin |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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In your cron.yaml, add: |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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cron: |
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Pawel Solyga <Pawel.Solyga@gmail.com>
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- description: Daily exception report |
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Pawel Solyga <Pawel.Solyga@gmail.com>
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url: /_ereporter?sender=you@yourdomain.com |
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schedule: every day 00:00 |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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This will cause a daily exception report to be generated and emailed to all |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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admins, with exception traces grouped by minor version. If you only want to |
2e0b0af889be
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get exception information for the most recent minor version, add the |
2e0b0af889be
Update Google App Engine from 1.2.3 to 1.2.5 in thirdparty folder.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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'versions=latest' argument to the query string. For other valid query string |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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arguments, see report_generator.py. |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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56 |
If you anticipate a lot of exception traces (for example, if you're deploying |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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many minor versions, each of which may have its own set of exceptions), you |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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can ensure that the traces from the newest minor versions get included by adding |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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this to your index.yaml: |
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parents:
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indexes: |
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- kind: __google_ExceptionRecord |
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properties: |
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Pawel Solyga <Pawel.Solyga@gmail.com>
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- name: date |
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- name: major_version |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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- name: minor_version |
2e0b0af889be
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Pawel Solyga <Pawel.Solyga@gmail.com>
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direction: desc |
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""" |
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parents:
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import datetime |
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import logging |
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import os |
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import sha |
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parents:
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import traceback |
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import urllib |
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from google.appengine.api import memcache |
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from google.appengine.ext import db |
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from google.appengine.ext import webapp |
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MAX_SIGNATURE_LENGTH = 256 |
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class ExceptionRecord(db.Model): |
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parents:
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"""Datastore model for a record of a unique exception.""" |
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parents:
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signature = db.StringProperty(required=True) |
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parents:
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major_version = db.StringProperty(required=True) |
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minor_version = db.IntegerProperty(required=True) |
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parents:
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date = db.DateProperty(required=True) |
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count = db.IntegerProperty(required=True, default=0) |
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parents:
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stacktrace = db.TextProperty(required=True) |
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http_method = db.TextProperty(required=True) |
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100 |
url = db.TextProperty(required=True) |
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101 |
handler = db.TextProperty(required=True) |
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|
102 |
|
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103 |
@classmethod |
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104 |
def get_key_name(cls, signature, version, date=None): |
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105 |
"""Generates a key name for an exception record. |
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|
106 |
|
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107 |
Args: |
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108 |
signature: A signature representing the exception and its site. |
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109 |
version: The major/minor version of the app the exception occurred in. |
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110 |
date: The date the exception occurred. |
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|
111 |
|
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112 |
Returns: |
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113 |
The unique key name for this exception record. |
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114 |
""" |
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115 |
if not date: |
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116 |
date = datetime.date.today() |
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117 |
return '%s@%s:%s' % (signature, date, version) |
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118 |
|
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119 |
|
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120 |
class ExceptionRecordingHandler(logging.Handler): |
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121 |
"""A handler that records exception data to the App Engine datastore.""" |
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122 |
|
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123 |
def __init__(self, log_interval=10): |
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124 |
"""Constructs a new ExceptionRecordingHandler. |
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125 |
|
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126 |
Args: |
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127 |
log_interval: The minimum interval at which we will log an individual |
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128 |
exception. This is a per-exception timeout, so doesn't affect the |
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129 |
aggregate rate of exception logging, only the rate at which we record |
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130 |
ocurrences of a single exception, to prevent datastore contention. |
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131 |
""" |
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132 |
self.log_interval = log_interval |
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133 |
logging.Handler.__init__(self) |
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134 |
|
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135 |
@classmethod |
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136 |
def __RelativePath(cls, path): |
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137 |
"""Rewrites a path to be relative to the app's root directory. |
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|
138 |
|
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|
139 |
Args: |
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|
140 |
path: The path to rewrite. |
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parents:
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|
141 |
|
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142 |
Returns: |
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parents:
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|
143 |
The path with the prefix removed, if that prefix matches the app's |
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|
144 |
root directory. |
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parents:
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|
145 |
""" |
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parents:
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|
146 |
cwd = os.getcwd() |
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|
147 |
if path.startswith(cwd): |
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|
148 |
path = path[len(cwd)+1:] |
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|
149 |
return path |
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|
150 |
|
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|
151 |
@classmethod |
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|
152 |
def __GetSignature(cls, exc_info): |
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153 |
"""Returns a unique signature string for an exception. |
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|
154 |
|
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|
155 |
Args: |
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|
156 |
exc_info: The exc_info object for an exception. |
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|
157 |
|
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|
158 |
Returns: |
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parents:
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|
159 |
A unique signature string for the exception, consisting of fully |
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parents:
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|
160 |
qualified exception name and call site. |
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parents:
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|
161 |
""" |
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|
162 |
ex_type, unused_value, trace = exc_info |
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|
163 |
frames = traceback.extract_tb(trace) |
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parents:
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|
164 |
|
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|
165 |
fulltype = '%s.%s' % (ex_type.__module__, ex_type.__name__) |
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|
166 |
path, line_no = frames[-1][:2] |
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parents:
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|
167 |
path = cls.__RelativePath(path) |
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|
168 |
site = '%s:%d' % (path, line_no) |
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parents:
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|
169 |
signature = '%s@%s' % (fulltype, site) |
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|
170 |
if len(signature) > MAX_SIGNATURE_LENGTH: |
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|
171 |
signature = 'hash:%s' % sha.new(signature).hexdigest() |
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|
172 |
|
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|
173 |
return signature |
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|
174 |
|
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|
175 |
@classmethod |
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|
176 |
def __GetURL(cls): |
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|
177 |
"""Returns the URL of the page currently being served. |
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|
178 |
|
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|
179 |
Returns: |
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|
180 |
The full URL of the page currently being served. |
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parents:
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|
181 |
""" |
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parents:
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|
182 |
if os.environ['SERVER_PORT'] == '80': |
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|
183 |
scheme = 'http://' |
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parents:
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|
184 |
else: |
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|
185 |
scheme = 'https://' |
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|
186 |
host = os.environ['SERVER_NAME'] |
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parents:
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|
187 |
script_name = urllib.quote(os.environ['SCRIPT_NAME']) |
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|
188 |
path_info = urllib.quote(os.environ['PATH_INFO']) |
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parents:
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|
189 |
qs = os.environ.get('QUERY_STRING', '') |
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parents:
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|
190 |
if qs: |
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parents:
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|
191 |
qs = '?' + qs |
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|
192 |
return scheme + host + script_name + path_info + qs |
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parents:
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|
193 |
|
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parents:
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|
194 |
def __GetFormatter(self): |
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|
195 |
"""Returns the log formatter for this handler. |
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parents:
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|
196 |
|
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parents:
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|
197 |
Returns: |
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parents:
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|
198 |
The log formatter to use. |
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""" |
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200 |
if self.formatter: |
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201 |
return self.formatter |
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202 |
else: |
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203 |
return logging._defaultFormatter |
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204 |
|
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205 |
def emit(self, record): |
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206 |
"""Log an error to the datastore, if applicable. |
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207 |
|
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208 |
Args: |
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209 |
The logging.LogRecord object. |
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210 |
See http://docs.python.org/library/logging.html#logging.LogRecord |
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211 |
""" |
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212 |
try: |
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213 |
if not record.exc_info: |
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214 |
return |
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215 |
|
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216 |
signature = self.__GetSignature(record.exc_info) |
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217 |
|
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218 |
if not memcache.add(signature, None, self.log_interval): |
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219 |
return |
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220 |
|
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221 |
db.run_in_transaction_custom_retries(1, self.__EmitTx, signature, |
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record.exc_info) |
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223 |
except Exception: |
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self.handleError(record) |
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225 |
|
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226 |
def __EmitTx(self, signature, exc_info): |
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"""Run in a transaction to insert or update the record for this transaction. |
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228 |
|
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229 |
Args: |
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230 |
signature: The signature for this exception. |
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231 |
exc_info: The exception info record. |
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232 |
""" |
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233 |
today = datetime.date.today() |
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234 |
version = os.environ['CURRENT_VERSION_ID'] |
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235 |
major_ver, minor_ver = version.rsplit('.', 1) |
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236 |
minor_ver = int(minor_ver) |
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237 |
key_name = ExceptionRecord.get_key_name(signature, version) |
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238 |
|
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239 |
exrecord = ExceptionRecord.get_by_key_name(key_name) |
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240 |
if not exrecord: |
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241 |
exrecord = ExceptionRecord( |
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242 |
key_name=key_name, |
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243 |
signature=signature, |
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244 |
major_version=major_ver, |
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245 |
minor_version=minor_ver, |
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246 |
date=today, |
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247 |
stacktrace=self.__GetFormatter().formatException(exc_info), |
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248 |
http_method=os.environ['REQUEST_METHOD'], |
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249 |
url=self.__GetURL(), |
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250 |
handler=self.__RelativePath(os.environ['PATH_TRANSLATED'])) |
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251 |
|
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252 |
exrecord.count += 1 |
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253 |
exrecord.put() |
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254 |
|
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255 |
|
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256 |
def register_logger(logger=None): |
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257 |
if not logger: |
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258 |
logger = logging.getLogger() |
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259 |
handler = ExceptionRecordingHandler() |
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260 |
logger.addHandler(handler) |
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261 |
return handler |