Chris WynneandNick Lang
67deac55c4
By passing a `Retry` object to `urlopen` instead of just `False`, it prevents `urllib3` from having to create a Retry object with `from_int`. `from_int` emits an undesirable log message when called with `retries=False`, and this can be avoided by the method described above.
198 lines
8.1 KiB
Python
198 lines
8.1 KiB
Python
import time
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import ssl
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import urllib3
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from urllib3.exceptions import ReadTimeoutError, SSLError as UrllibSSLError
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from urllib3.util.retry import Retry
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import warnings
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import gzip
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# sentinal value for `verify_certs`.
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# This is used to detect if a user is passing in a value for `verify_certs`
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# so we can raise a warning if using SSL kwargs AND SSLContext.
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VERIFY_CERTS_DEFAULT = None
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CA_CERTS = None
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try:
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import certifi
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CA_CERTS = certifi.where()
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except ImportError:
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pass
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from .base import Connection
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from ..exceptions import ConnectionError, ImproperlyConfigured, ConnectionTimeout, SSLError
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from ..compat import urlencode
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def create_ssl_context(**kwargs):
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"""
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A helper function around creating an SSL context
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https://docs.python.org/3/library/ssl.html#context-creation
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Accepts kwargs in the same manner as `create_default_context`.
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"""
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ctx = ssl.create_default_context(**kwargs)
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return ctx
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class Urllib3HttpConnection(Connection):
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"""
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Default connection class using the `urllib3` library and the http protocol.
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:arg host: hostname of the node (default: localhost)
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:arg port: port to use (integer, default: 9200)
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:arg url_prefix: optional url prefix for elasticsearch
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:arg timeout: default timeout in seconds (float, default: 10)
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:arg http_auth: optional http auth information as either ':' separated
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string or a tuple
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:arg use_ssl: use ssl for the connection if `True`
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:arg verify_certs: whether to verify SSL certificates
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:arg ca_certs: optional path to CA bundle.
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See https://urllib3.readthedocs.io/en/latest/security.html#using-certifi-with-urllib3
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for instructions how to get default set
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:arg client_cert: path to the file containing the private key and the
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certificate, or cert only if using client_key
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:arg client_key: path to the file containing the private key if using
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separate cert and key files (client_cert will contain only the cert)
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:arg ssl_version: version of the SSL protocol to use. Choices are:
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SSLv23 (default) SSLv2 SSLv3 TLSv1 (see ``PROTOCOL_*`` constants in the
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``ssl`` module for exact options for your environment).
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:arg ssl_assert_hostname: use hostname verification if not `False`
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:arg ssl_assert_fingerprint: verify the supplied certificate fingerprint if not `None`
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:arg maxsize: the number of connections which will be kept open to this
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host. See https://urllib3.readthedocs.io/en/1.4/pools.html#api for more
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information.
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:arg headers: any custom http headers to be add to requests
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:arg http_compress: Use gzip compression
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"""
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def __init__(self, host='localhost', port=9200, http_auth=None,
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use_ssl=False, verify_certs=VERIFY_CERTS_DEFAULT, ca_certs=None, client_cert=None,
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client_key=None, ssl_version=None, ssl_assert_hostname=None,
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ssl_assert_fingerprint=None, maxsize=10, headers=None, ssl_context=None, http_compress=False, **kwargs):
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super(Urllib3HttpConnection, self).__init__(host=host, port=port, use_ssl=use_ssl, **kwargs)
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self.http_compress = http_compress
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self.headers = urllib3.make_headers(keep_alive=True)
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if http_auth is not None:
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if isinstance(http_auth, (tuple, list)):
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http_auth = ':'.join(http_auth)
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self.headers.update(urllib3.make_headers(basic_auth=http_auth))
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# update headers in lowercase to allow overriding of auth headers
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if headers:
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for k in headers:
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self.headers[k.lower()] = headers[k]
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if self.http_compress == True:
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self.headers.update(urllib3.make_headers(accept_encoding=True))
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self.headers.update({'content-encoding': 'gzip'})
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self.headers.setdefault('content-type', 'application/json')
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pool_class = urllib3.HTTPConnectionPool
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kw = {}
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# if providing an SSL context, raise error if any other SSL related flag is used
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if ssl_context and ( (verify_certs is not VERIFY_CERTS_DEFAULT) or ca_certs
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or client_cert or client_key or ssl_version):
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warnings.warn("When using `ssl_context`, all other SSL related kwargs are ignored")
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# if ssl_context provided use SSL by default
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if ssl_context and self.use_ssl:
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pool_class = urllib3.HTTPSConnectionPool
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kw.update({
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'assert_fingerprint': ssl_assert_fingerprint,
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'ssl_context': ssl_context,
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})
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elif self.use_ssl:
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pool_class = urllib3.HTTPSConnectionPool
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kw.update({
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'ssl_version': ssl_version,
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'assert_hostname': ssl_assert_hostname,
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'assert_fingerprint': ssl_assert_fingerprint,
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})
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# If `verify_certs` is sentinal value, default `verify_certs` to `True`
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if verify_certs is VERIFY_CERTS_DEFAULT:
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verify_certs = True
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ca_certs = CA_CERTS if ca_certs is None else ca_certs
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if verify_certs:
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if not ca_certs:
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raise ImproperlyConfigured("Root certificates are missing for certificate "
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"validation. Either pass them in using the ca_certs parameter or "
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"install certifi to use it automatically.")
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kw.update({
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'cert_reqs': 'CERT_REQUIRED',
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'ca_certs': ca_certs,
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'cert_file': client_cert,
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'key_file': client_key,
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})
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else:
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warnings.warn(
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'Connecting to %s using SSL with verify_certs=False is insecure.' % host)
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self.pool = pool_class(host, port=port, timeout=self.timeout, maxsize=maxsize, **kw)
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def perform_request(self, method, url, params=None, body=None, timeout=None, ignore=(), headers=None):
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url = self.url_prefix + url
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if params:
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url = '%s?%s' % (url, urlencode(params))
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full_url = self.host + url
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start = time.time()
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try:
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kw = {}
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if timeout:
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kw['timeout'] = timeout
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# in python2 we need to make sure the url and method are not
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# unicode. Otherwise the body will be decoded into unicode too and
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# that will fail (#133, #201).
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if not isinstance(url, str):
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url = url.encode('utf-8')
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if not isinstance(method, str):
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method = method.encode('utf-8')
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request_headers = self.headers
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if headers:
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request_headers = request_headers.copy()
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request_headers.update(headers)
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if self.http_compress and body:
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try:
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body = gzip.compress(body)
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except AttributeError:
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# oops, Python2.7 doesn't have `gzip.compress` let's try
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# again
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body = gzip.zlib.compress(body)
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response = self.pool.urlopen(method, url, body, retries=Retry(False), headers=request_headers, **kw)
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duration = time.time() - start
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raw_data = response.data.decode('utf-8')
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except Exception as e:
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self.log_request_fail(method, full_url, url, body, time.time() - start, exception=e)
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if isinstance(e, UrllibSSLError):
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raise SSLError('N/A', str(e), e)
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if isinstance(e, ReadTimeoutError):
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raise ConnectionTimeout('TIMEOUT', str(e), e)
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raise ConnectionError('N/A', str(e), e)
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# raise errors based on http status codes, let the client handle those if needed
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if not (200 <= response.status < 300) and response.status not in ignore:
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self.log_request_fail(method, full_url, url, body, duration, response.status, raw_data)
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self._raise_error(response.status, raw_data)
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self.log_request_success(method, full_url, url, body, response.status,
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raw_data, duration)
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return response.status, response.getheaders(), raw_data
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def close(self):
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"""
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Explicitly closes connection
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"""
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self.pool.close()
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