257 lines
9.0 KiB
Python
257 lines
9.0 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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from .base import Connection
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from ..exceptions import (
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ConnectionError,
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ImproperlyConfigured,
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ConnectionTimeout,
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SSLError,
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)
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from ..compat import urlencode
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# sentinel value for `verify_certs` and `ssl_show_warn`.
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# This is used to detect if a user is passing in a value
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# for SSL kwargs if also using an SSLContext.
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VERIFY_CERTS_DEFAULT = object()
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SSL_SHOW_WARN_DEFAULT = object()
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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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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 ssl_show_warn: show warning when verify certs is disabled
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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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:arg cloud_id: The Cloud ID from ElasticCloud. Convenient way to connect to cloud instances.
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Other host connection params will be ignored.
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:arg api_key: optional API Key authentication as either base64 encoded string or a tuple.
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"""
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def __init__(
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self,
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host="localhost",
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port=9200,
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http_auth=None,
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use_ssl=False,
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verify_certs=VERIFY_CERTS_DEFAULT,
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ssl_show_warn=SSL_SHOW_WARN_DEFAULT,
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ca_certs=None,
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client_cert=None,
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client_key=None,
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ssl_version=None,
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ssl_assert_hostname=None,
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ssl_assert_fingerprint=None,
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maxsize=10,
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headers=None,
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ssl_context=None,
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http_compress=None,
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cloud_id=None,
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api_key=None,
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**kwargs
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):
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# Initialize headers before calling super().__init__().
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self.headers = urllib3.make_headers(keep_alive=True)
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super(Urllib3HttpConnection, self).__init__(
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host=host,
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port=port,
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use_ssl=use_ssl,
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headers=headers,
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http_compress=http_compress,
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cloud_id=cloud_id,
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api_key=api_key,
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**kwargs
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)
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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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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 (
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(verify_certs is not VERIFY_CERTS_DEFAULT)
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or (ssl_show_warn is not SSL_SHOW_WARN_DEFAULT)
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or ca_certs
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or client_cert
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or client_key
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or ssl_version
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):
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warnings.warn(
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"When using `ssl_context`, all other SSL related kwargs are ignored"
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)
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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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{
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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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)
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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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{
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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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)
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# Convert all sentinel values to their actual default
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# values if not using an SSLContext.
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if verify_certs is VERIFY_CERTS_DEFAULT:
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verify_certs = True
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if ssl_show_warn is SSL_SHOW_WARN_DEFAULT:
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ssl_show_warn = 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(
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"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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)
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kw.update(
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{
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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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)
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else:
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kw["cert_reqs"] = "CERT_NONE"
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if ssl_show_warn:
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warnings.warn(
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"Connecting to %s using SSL with verify_certs=False is insecure."
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% host
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)
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if not ssl_show_warn:
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urllib3.disable_warnings()
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self.pool = pool_class(
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self.hostname, port=self.port, timeout=self.timeout, maxsize=maxsize, **kw
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)
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def perform_request(
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self, method, url, params=None, body=None, timeout=None, ignore=(), headers=None
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):
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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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orig_body = body
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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.copy()
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request_headers.update(headers or ())
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if self.http_compress and body:
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body = self._gzip_compress(body)
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request_headers["content-encoding"] = "gzip"
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response = self.pool.urlopen(
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method, url, body, retries=Retry(False), headers=request_headers, **kw
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)
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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(
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method, full_url, url, orig_body, time.time() - start, exception=e
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)
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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(
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method, full_url, url, orig_body, duration, response.status, raw_data
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)
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self._raise_error(response.status, raw_data)
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self.log_request_success(
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method, full_url, url, orig_body, response.status, raw_data, duration
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)
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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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