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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
|
# -*- coding: utf-8 -*-
#
# Copyright 2012 OpenStack 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.
import copy
import json
import logging
import os
import socket
import ssl
from keystoneauth1 import adapter
from oslo_utils import importutils
import six
import six.moves.urllib.parse as urlparse
from magnumclient import exceptions
osprofiler_web = importutils.try_import("osprofiler.web")
LOG = logging.getLogger(__name__)
USER_AGENT = 'python-magnumclient'
CHUNKSIZE = 1024 * 64 # 64kB
API_VERSION = '/v1'
DEFAULT_API_VERSION = 'latest'
def _extract_error_json_text(body_json):
error_json = {}
if 'error_message' in body_json:
raw_msg = body_json['error_message']
error_json = json.loads(raw_msg)
elif 'error' in body_json:
error_body = body_json['error']
error_json = {'faultstring': error_body['title'],
'debuginfo': error_body['message']}
else:
error_body = body_json['errors'][0]
error_json = {'faultstring': error_body['title']}
if 'detail' in error_body:
error_json['debuginfo'] = error_body['detail']
elif 'description' in error_body:
error_json['debuginfo'] = error_body['description']
return error_json
def _extract_error_json(body, resp):
"""Return error_message from the HTTP response body."""
content_type = resp.headers.get("Content-Type", "")
if content_type.startswith("application/json"):
try:
body_json = resp.json()
return _extract_error_json_text(body_json)
except ValueError:
return {}
else:
try:
body_json = json.loads(body)
return _extract_error_json_text(body_json)
except ValueError:
return {}
class HTTPClient(object):
def __init__(self, endpoint, api_version=DEFAULT_API_VERSION, **kwargs):
self.endpoint = endpoint
self.auth_token = kwargs.get('token')
self.auth_ref = kwargs.get('auth_ref')
self.api_version = api_version
self.connection_params = self.get_connection_params(endpoint, **kwargs)
@staticmethod
def get_connection_params(endpoint, **kwargs):
parts = urlparse.urlparse(endpoint)
# trim API version and trailing slash from endpoint
path = parts.path
path = path.rstrip('/').rstrip(API_VERSION)
_args = (parts.hostname, parts.port, path)
_kwargs = {'timeout': (float(kwargs.get('timeout'))
if kwargs.get('timeout') else 600)}
if parts.scheme == 'https':
_class = VerifiedHTTPSConnection
_kwargs['ca_file'] = kwargs.get('ca_file', None)
_kwargs['cert_file'] = kwargs.get('cert_file', None)
_kwargs['key_file'] = kwargs.get('key_file', None)
_kwargs['insecure'] = kwargs.get('insecure', False)
elif parts.scheme == 'http':
_class = six.moves.http_client.HTTPConnection
else:
msg = 'Unsupported scheme: %s' % parts.scheme
raise exceptions.EndpointException(msg)
return (_class, _args, _kwargs)
def get_connection(self):
_class = self.connection_params[0]
return _class(*self.connection_params[1][0:2],
**self.connection_params[2])
def log_curl_request(self, method, url, kwargs):
curl = ['curl -i -X %s' % method]
for (key, value) in kwargs['headers'].items():
header = '-H \'%s: %s\'' % (key, value)
curl.append(header)
conn_params_fmt = [
('key_file', '--key %s'),
('cert_file', '--cert %s'),
('ca_file', '--cacert %s'),
]
for (key, fmt) in conn_params_fmt:
value = self.connection_params[2].get(key)
if value:
curl.append(fmt % value)
if self.connection_params[2].get('insecure'):
curl.append('-k')
if 'body' in kwargs:
curl.append('-d \'%s\'' % kwargs['body'])
curl.append('%s/%s' % (self.endpoint, url.lstrip(API_VERSION)))
LOG.debug(' '.join(curl))
@staticmethod
def log_http_response(resp, body=None):
status = (resp.version / 10.0, resp.status, resp.reason)
dump = ['\nHTTP/%.1f %s %s' % status]
dump.extend(['%s: %s' % (k, v) for k, v in resp.getheaders()])
dump.append('')
if body:
dump.extend([body, ''])
LOG.debug('\n'.join(dump))
def _make_connection_url(self, url):
(_class, _args, _kwargs) = self.connection_params
base_url = _args[2]
return '%s/%s' % (base_url, url.lstrip('/'))
def _http_request(self, url, method, **kwargs):
"""Send an http request with the specified characteristics.
Wrapper around httplib.HTTP(S)Connection.request to handle tasks such
as setting headers and error handling.
"""
# Copy the kwargs so we can reuse the original in case of redirects
kwargs['headers'] = copy.deepcopy(kwargs.get('headers', {}))
kwargs['headers'].setdefault('User-Agent', USER_AGENT)
if self.api_version:
version_string = 'container-infra %s' % self.api_version
kwargs['headers'].setdefault(
'OpenStack-API-Version', version_string)
if self.auth_token:
kwargs['headers'].setdefault('X-Auth-Token', self.auth_token)
self.log_curl_request(method, url, kwargs)
conn = self.get_connection()
try:
conn_url = self._make_connection_url(url)
conn.request(method, conn_url, **kwargs)
resp = conn.getresponse()
except socket.gaierror as e:
message = ("Error finding address for %(url)s: %(e)s"
% dict(url=url, e=e))
raise exceptions.EndpointNotFound(message)
except (socket.error, socket.timeout) as e:
endpoint = self.endpoint
message = ("Error communicating with %(endpoint)s %(e)s"
% dict(endpoint=endpoint, e=e))
raise exceptions.ConnectionRefused(message)
body_iter = ResponseBodyIterator(resp)
# Read body into string if it isn't obviously image data
body_str = None
if resp.getheader('content-type', None) != 'application/octet-stream':
# decoding byte to string is necessary for Python 3.4 compatibility
# this issues has not been found with Python 3.4 unit tests
# because the test creates a fake http response of type str
# the if statement satisfies test (str) and real (bytes) behavior
body_list = [
chunk.decode("utf-8") if isinstance(chunk, bytes)
else chunk for chunk in body_iter
]
body_str = ''.join(body_list)
self.log_http_response(resp, body_str)
body_iter = six.StringIO(body_str)
else:
self.log_http_response(resp)
if 400 <= resp.status < 600:
LOG.warning("Request returned failure status.")
error_json = _extract_error_json(body_str, resp)
raise exceptions.from_response(
resp, error_json.get('faultstring'),
error_json.get('debuginfo'), method, url)
elif resp.status in (301, 302, 305):
# Redirected. Reissue the request to the new location.
return self._http_request(resp['location'], method, **kwargs)
elif resp.status == 300:
raise exceptions.from_response(resp, method=method, url=url)
return resp, body_iter
def json_request(self, method, url, **kwargs):
kwargs.setdefault('headers', {})
kwargs['headers'].setdefault('Content-Type', 'application/json')
kwargs['headers'].setdefault('Accept', 'application/json')
if 'body' in kwargs:
kwargs['body'] = json.dumps(kwargs['body'])
resp, body_iter = self._http_request(url, method, **kwargs)
content_type = resp.getheader('content-type', None)
if resp.status == 204 or resp.status == 205 or content_type is None:
return resp, list()
if 'application/json' in content_type:
body = ''.join([chunk for chunk in body_iter])
try:
body = json.loads(body)
except ValueError:
LOG.error('Could not decode response body as JSON')
else:
body = None
return resp, body
def raw_request(self, method, url, **kwargs):
kwargs.setdefault('headers', {})
kwargs['headers'].setdefault('Content-Type',
'application/octet-stream')
return self._http_request(url, method, **kwargs)
class VerifiedHTTPSConnection(six.moves.http_client.HTTPSConnection):
"""httplib-compatibile connection using client-side SSL authentication
:see http://code.activestate.com/recipes/
577548-https-httplib-client-connection-with-certificate-v/
"""
def __init__(self, host, port, key_file=None, cert_file=None,
ca_file=None, timeout=None, insecure=False):
six.moves.http_client.HTTPSConnection.__init__(self, host, port,
key_file=key_file,
cert_file=cert_file)
self.key_file = key_file
self.cert_file = cert_file
if ca_file is not None:
self.ca_file = ca_file
else:
self.ca_file = self.get_system_ca_file()
self.timeout = timeout
self.insecure = insecure
def connect(self):
"""Connect to a host on a given (SSL) port.
If ca_file is pointing somewhere, use it to check Server Certificate.
Redefined/copied and extended from httplib.py:1105 (Python 2.6.x).
This is needed to pass cert_reqs=ssl.CERT_REQUIRED as parameter to
ssl.wrap_socket(), which forces SSL to check server certificate against
our client certificate.
"""
sock = socket.create_connection((self.host, self.port), self.timeout)
if self._tunnel_host:
self.sock = sock
self._tunnel()
if self.insecure is True:
kwargs = {'cert_reqs': ssl.CERT_NONE}
else:
kwargs = {'cert_reqs': ssl.CERT_REQUIRED, 'ca_certs': self.ca_file}
if self.cert_file:
kwargs['certfile'] = self.cert_file
if self.key_file:
kwargs['keyfile'] = self.key_file
self.sock = ssl.wrap_socket(sock, **kwargs)
@staticmethod
def get_system_ca_file():
"""Return path to system default CA file."""
# Standard CA file locations for Debian/Ubuntu, RedHat/Fedora,
# Suse, FreeBSD/OpenBSD
ca_path = ['/etc/ssl/certs/ca-certificates.crt',
'/etc/pki/tls/certs/ca-bundle.crt',
'/etc/ssl/ca-bundle.pem',
'/etc/ssl/cert.pem']
for ca in ca_path:
if os.path.exists(ca):
return ca
return None
class SessionClient(adapter.LegacyJsonAdapter):
"""HTTP client based on Keystone client session."""
def __init__(self, user_agent=USER_AGENT, logger=LOG,
api_version=DEFAULT_API_VERSION, *args, **kwargs):
self.user_agent = USER_AGENT
self.api_version = api_version
super(SessionClient, self).__init__(*args, **kwargs)
def _http_request(self, url, method, **kwargs):
if url.startswith(API_VERSION):
url = url[len(API_VERSION):]
kwargs.setdefault('user_agent', self.user_agent)
kwargs.setdefault('auth', self.auth)
kwargs.setdefault('endpoint_override', self.endpoint_override)
# Copy the kwargs so we can reuse the original in case of redirects
kwargs['headers'] = copy.deepcopy(kwargs.get('headers', {}))
kwargs['headers'].setdefault('User-Agent', self.user_agent)
# NOTE(tovin07): osprofiler_web.get_trace_id_headers does not add any
# headers in case if osprofiler is not initialized.
if osprofiler_web:
kwargs['headers'].update(osprofiler_web.get_trace_id_headers())
if self.api_version:
version_string = 'container-infra %s' % self.api_version
kwargs['headers'].setdefault(
'OpenStack-API-Version', version_string)
endpoint_filter = kwargs.setdefault('endpoint_filter', {})
endpoint_filter.setdefault('interface', self.interface)
endpoint_filter.setdefault('service_type', self.service_type)
endpoint_filter.setdefault('region_name', self.region_name)
resp = self.session.request(url, method,
raise_exc=False, **kwargs)
if 400 <= resp.status_code < 600:
error_json = _extract_error_json(resp.content, resp)
raise exceptions.from_response(
resp, error_json.get('faultstring'),
error_json.get('debuginfo'), method, url)
elif resp.status_code in (301, 302, 305):
# Redirected. Reissue the request to the new location.
location = resp.headers.get('location')
resp = self._http_request(location, method, **kwargs)
elif resp.status_code == 300:
raise exceptions.from_response(resp, method=method, url=url)
return resp
def json_request(self, method, url, **kwargs):
kwargs.setdefault('headers', {})
kwargs['headers'].setdefault('Content-Type', 'application/json')
kwargs['headers'].setdefault('Accept', 'application/json')
if 'body' in kwargs:
kwargs['data'] = json.dumps(kwargs.pop('body'))
resp = self._http_request(url, method, **kwargs)
body = resp.content
content_type = resp.headers.get('content-type', None)
status = resp.status_code
if status == 204 or status == 205 or content_type is None:
return resp, list()
if 'application/json' in content_type:
try:
body = resp.json()
except ValueError:
LOG.error('Could not decode response body as JSON')
else:
body = None
return resp, body
def raw_request(self, method, url, **kwargs):
kwargs.setdefault('headers', {})
kwargs['headers'].setdefault('Content-Type',
'application/octet-stream')
return self._http_request(url, method, **kwargs)
class ResponseBodyIterator(object):
"""A class that acts as an iterator over an HTTP response."""
def __init__(self, resp):
self.resp = resp
def __iter__(self):
while True:
try:
yield self.next()
except StopIteration:
return
def __bool__(self):
return hasattr(self, 'items')
__nonzero__ = __bool__ # Python 2.x compatibility
def next(self):
chunk = self.resp.read(CHUNKSIZE)
if chunk:
return chunk
else:
raise StopIteration
def _construct_http_client(*args, **kwargs):
session = kwargs.pop('session', None)
auth = kwargs.pop('auth', None)
if session:
service_type = kwargs.pop('service_type', 'baremetal')
interface = kwargs.pop('endpoint_type', None)
region_name = kwargs.pop('region_name', None)
return SessionClient(session=session,
auth=auth,
interface=interface,
service_type=service_type,
region_name=region_name,
service_name=None,
user_agent='python-magnumclient')
else:
return HTTPClient(*args, **kwargs)
|