/
_helpers.py
143 lines (115 loc) · 4.43 KB
/
_helpers.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
# Copyright 2016 Google LLC All Rights Reserved.
#
# 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.
"""Helper functions for logging handlers."""
import math
import json
try:
import flask
except ImportError: # pragma: NO COVER
flask = None
from google.cloud.logging_v2.handlers.middleware.request import _get_django_request
_DJANGO_CONTENT_LENGTH = "CONTENT_LENGTH"
_DJANGO_TRACE_HEADER = "HTTP_X_CLOUD_TRACE_CONTEXT"
_DJANGO_USERAGENT_HEADER = "HTTP_USER_AGENT"
_DJANGO_REMOTE_ADDR_HEADER = "REMOTE_ADDR"
_DJANGO_REFERER_HEADER = "HTTP_REFERER"
_FLASK_TRACE_HEADER = "X_CLOUD_TRACE_CONTEXT"
_PROTOCOL_HEADER = "SERVER_PROTOCOL"
def format_stackdriver_json(record, message):
"""Helper to format a LogRecord in in Stackdriver fluentd format.
Returns:
str: JSON str to be written to the log file.
"""
subsecond, second = math.modf(record.created)
payload = {
"message": message,
"timestamp": {"seconds": int(second), "nanos": int(subsecond * 1e9)},
"thread": record.thread,
"severity": record.levelname,
}
return json.dumps(payload, ensure_ascii=False)
def get_request_data_from_flask():
"""Get http_request and trace data from flask request headers.
Returns:
Tuple[Optional[dict], Optional[str]]:
Data related to the current http request and the trace_id for the
request. Both fields will be None if a flask request isn't found.
"""
if flask is None or not flask.request:
return None, None
# build http_request
http_request = {
"requestMethod": flask.request.method,
"requestUrl": flask.request.url,
"requestSize": flask.request.content_length,
"userAgent": flask.request.user_agent.string,
"remoteIp": flask.request.remote_addr,
"referer": flask.request.referrer,
"protocol": flask.request.environ.get(_PROTOCOL_HEADER),
}
# find trace id
trace_id = None
header = flask.request.headers.get(_FLASK_TRACE_HEADER)
if header:
trace_id = header.split("/", 1)[0]
return http_request, trace_id
def get_request_data_from_django():
"""Get http_request and trace data from django request headers.
Returns:
Tuple[Optional[dict], Optional[str]]:
Data related to the current http request and the trace_id for the
request. Both fields will be None if a django request isn't found.
"""
request = _get_django_request()
if request is None:
return None, None
# convert content_length to int if it exists
content_length = None
try:
content_length = int(request.META.get(_DJANGO_CONTENT_LENGTH))
except (ValueError, TypeError):
content_length = None
# build http_request
http_request = {
"requestMethod": request.method,
"requestUrl": request.build_absolute_uri(),
"requestSize": content_length,
"userAgent": request.META.get(_DJANGO_USERAGENT_HEADER),
"remoteIp": request.META.get(_DJANGO_REMOTE_ADDR_HEADER),
"referer": request.META.get(_DJANGO_REFERER_HEADER),
"protocol": request.META.get(_PROTOCOL_HEADER),
}
# find trace id
trace_id = None
header = request.META.get(_DJANGO_TRACE_HEADER)
if header:
trace_id = header.split("/", 1)[0]
return http_request, trace_id
def get_request_data():
"""Helper to get http_request and trace data from supported web
frameworks (currently supported: Flask and Django).
Returns:
Tuple[Optional[dict], Optional[str]]:
Data related to the current http request and the trace_id for the
request. Both fields will be None if a supported web request isn't found.
"""
checkers = (
get_request_data_from_django,
get_request_data_from_flask,
)
for checker in checkers:
http_request, trace_id = checker()
if http_request is not None:
return http_request, trace_id
return None, None