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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
# -*- coding: utf-8 -
#
# This file is part of gunicorn released under the MIT license.
# See the NOTICE for more information.
import importlib.util
import importlib.machinery
import os
import sys
import traceback
from gunicorn import util
from gunicorn.arbiter import Arbiter
from gunicorn.config import Config, get_default_config_file
from gunicorn import debug
class BaseApplication(object):
"""
An application interface for configuring and loading
the various necessities for any given web framework.
"""
def __init__(self, usage=None, prog=None):
self.usage = usage
self.cfg = None
self.callable = None
self.prog = prog
self.logger = None
self.do_load_config()
def do_load_config(self):
"""
Loads the configuration
"""
try:
self.load_default_config()
self.load_config()
except Exception as e:
print("\nError: %s" % str(e), file=sys.stderr)
sys.stderr.flush()
sys.exit(1)
def load_default_config(self):
# init configuration
self.cfg = Config(self.usage, prog=self.prog)
def init(self, parser, opts, args):
raise NotImplementedError
def load(self):
raise NotImplementedError
def load_config(self):
"""
This method is used to load the configuration from one or several input(s).
Custom Command line, configuration file.
You have to override this method in your class.
"""
raise NotImplementedError
def reload(self):
self.do_load_config()
if self.cfg.spew:
debug.spew()
def wsgi(self):
if self.callable is None:
self.callable = self.load()
return self.callable
def run(self):
try:
Arbiter(self).run()
except RuntimeError as e:
print("\nError: %s\n" % e, file=sys.stderr)
sys.stderr.flush()
sys.exit(1)
class Application(BaseApplication):
# 'init' and 'load' methods are implemented by WSGIApplication.
# pylint: disable=abstract-method
def chdir(self):
# chdir to the configured path before loading,
# default is the current dir
os.chdir(self.cfg.chdir)
# add the path to sys.path
if self.cfg.chdir not in sys.path:
sys.path.insert(0, self.cfg.chdir)
def get_config_from_filename(self, filename):
if not os.path.exists(filename):
raise RuntimeError("%r doesn't exist" % filename)
ext = os.path.splitext(filename)[1]
try:
module_name = '__config__'
if ext in [".py", ".pyc"]:
spec = importlib.util.spec_from_file_location(module_name, filename)
else:
msg = "configuration file should have a valid Python extension.\n"
util.warn(msg)
loader_ = importlib.machinery.SourceFileLoader(module_name, filename)
spec = importlib.util.spec_from_file_location(module_name, filename, loader=loader_)
mod = importlib.util.module_from_spec(spec)
sys.modules[module_name] = mod
spec.loader.exec_module(mod)
except Exception:
print("Failed to read config file: %s" % filename, file=sys.stderr)
traceback.print_exc()
sys.stderr.flush()
sys.exit(1)
return vars(mod)
def get_config_from_module_name(self, module_name):
return vars(importlib.import_module(module_name))
def load_config_from_module_name_or_filename(self, location):
"""
Loads the configuration file: the file is a python file, otherwise raise an RuntimeError
Exception or stop the process if the configuration file contains a syntax error.
"""
if location.startswith("python:"):
module_name = location[len("python:"):]
cfg = self.get_config_from_module_name(module_name)
else:
if location.startswith("file:"):
filename = location[len("file:"):]
else:
filename = location
cfg = self.get_config_from_filename(filename)
for k, v in cfg.items():
# Ignore unknown names
if k not in self.cfg.settings:
continue
try:
self.cfg.set(k.lower(), v)
except Exception:
print("Invalid value for %s: %s\n" % (k, v), file=sys.stderr)
sys.stderr.flush()
raise
return cfg
def load_config_from_file(self, filename):
return self.load_config_from_module_name_or_filename(location=filename)
def load_config(self):
# parse console args
parser = self.cfg.parser()
args = parser.parse_args()
# optional settings from apps
cfg = self.init(parser, args, args.args)
# set up import paths and follow symlinks
self.chdir()
# Load up the any app specific configuration
if cfg:
for k, v in cfg.items():
self.cfg.set(k.lower(), v)
env_args = parser.parse_args(self.cfg.get_cmd_args_from_env())
if args.config:
self.load_config_from_file(args.config)
elif env_args.config:
self.load_config_from_file(env_args.config)
else:
default_config = get_default_config_file()
if default_config is not None:
self.load_config_from_file(default_config)
# Load up environment configuration
for k, v in vars(env_args).items():
if v is None:
continue
if k == "args":
continue
self.cfg.set(k.lower(), v)
# Lastly, update the configuration with any command line settings.
for k, v in vars(args).items():
if v is None:
continue
if k == "args":
continue
self.cfg.set(k.lower(), v)
# current directory might be changed by the config now
# set up import paths and follow symlinks
self.chdir()
def run(self):
if self.cfg.print_config:
print(self.cfg)
if self.cfg.print_config or self.cfg.check_config:
try:
self.load()
except Exception:
msg = "\nError while loading the application:\n"
print(msg, file=sys.stderr)
traceback.print_exc()
sys.stderr.flush()
sys.exit(1)
sys.exit(0)
if self.cfg.spew:
debug.spew()
if self.cfg.daemon:
if os.environ.get('NOTIFY_SOCKET'):
msg = "Warning: you shouldn't specify `daemon = True`" \
" when launching by systemd with `Type = notify`"
print(msg, file=sys.stderr, flush=True)
util.daemonize(self.cfg.enable_stdio_inheritance)
# set python paths
if self.cfg.pythonpath:
paths = self.cfg.pythonpath.split(",")
for path in paths:
pythonpath = os.path.abspath(path)
if pythonpath not in sys.path:
sys.path.insert(0, pythonpath)
super().run()
|
