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# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you 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 gzip
import os.path
import ssl
import time
import warnings
from typing import Literal, Optional, Union
from .._compat import warn_stacklevel
from .._exceptions import ConnectionError, ConnectionTimeout, SecurityWarning, TlsError
from .._models import ApiResponseMeta, HttpHeaders, NodeConfig
from ..client_utils import DEFAULT, DefaultType, client_meta_version
from ._base import (
BUILTIN_EXCEPTIONS,
DEFAULT_CA_CERTS,
RERAISE_EXCEPTIONS,
NodeApiResponse,
ssl_context_from_node_config,
)
from ._base_async import BaseAsyncNode
try:
import httpx
_HTTPX_AVAILABLE = True
_HTTPX_META_VERSION = client_meta_version(httpx.__version__)
except ImportError:
_HTTPX_AVAILABLE = False
_HTTPX_META_VERSION = ""
class HttpxAsyncHttpNode(BaseAsyncNode):
"""
Async HTTP node using httpx. Supports both Trio and asyncio.
"""
_CLIENT_META_HTTP_CLIENT = ("hx", _HTTPX_META_VERSION)
def __init__(self, config: NodeConfig):
if not _HTTPX_AVAILABLE: # pragma: nocover
raise ValueError("You must have 'httpx' installed to use HttpxNode")
super().__init__(config)
if config.ssl_assert_fingerprint:
raise ValueError(
"httpx does not support certificate pinning. https://github.com/encode/httpx/issues/761"
)
ssl_context: Union[ssl.SSLContext, Literal[False]] = False
if config.scheme == "https":
if config.ssl_context is not None:
ssl_context = ssl_context_from_node_config(config)
else:
ssl_context = ssl_context_from_node_config(config)
ca_certs = (
DEFAULT_CA_CERTS if config.ca_certs is None else config.ca_certs
)
if config.verify_certs:
if not ca_certs:
raise ValueError(
"Root certificates are missing for certificate "
"validation. Either pass them in using the ca_certs parameter or "
"install certifi to use it automatically."
)
else:
if config.ssl_show_warn:
warnings.warn(
f"Connecting to {self.base_url!r} using TLS with verify_certs=False is insecure",
stacklevel=warn_stacklevel(),
category=SecurityWarning,
)
if ca_certs is not None:
if os.path.isfile(ca_certs):
ssl_context.load_verify_locations(cafile=ca_certs)
elif os.path.isdir(ca_certs):
ssl_context.load_verify_locations(capath=ca_certs)
else:
raise ValueError("ca_certs parameter is not a path")
# Use client_cert and client_key variables for SSL certificate configuration.
if config.client_cert and not os.path.isfile(config.client_cert):
raise ValueError("client_cert is not a path to a file")
if config.client_key and not os.path.isfile(config.client_key):
raise ValueError("client_key is not a path to a file")
if config.client_cert and config.client_key:
ssl_context.load_cert_chain(config.client_cert, config.client_key)
elif config.client_cert:
ssl_context.load_cert_chain(config.client_cert)
self.client = httpx.AsyncClient(
base_url=f"{config.scheme}://{config.host}:{config.port}",
limits=httpx.Limits(max_connections=config.connections_per_node),
verify=ssl_context or False,
timeout=config.request_timeout,
)
async def perform_request( # type: ignore[override]
self,
method: str,
target: str,
body: Optional[bytes] = None,
headers: Optional[HttpHeaders] = None,
request_timeout: Union[DefaultType, Optional[float]] = DEFAULT,
) -> NodeApiResponse:
resolved_headers = self._headers.copy()
if headers:
resolved_headers.update(headers)
if body:
if self._http_compress:
resolved_body = gzip.compress(body)
resolved_headers["content-encoding"] = "gzip"
else:
resolved_body = body
else:
resolved_body = None
try:
start = time.perf_counter()
if request_timeout is DEFAULT:
resp = await self.client.request(
method,
target,
content=resolved_body,
headers=dict(resolved_headers),
)
else:
resp = await self.client.request(
method,
target,
content=resolved_body,
headers=dict(resolved_headers),
timeout=request_timeout,
)
response_body = resp.read()
duration = time.perf_counter() - start
except RERAISE_EXCEPTIONS + BUILTIN_EXCEPTIONS:
raise
except Exception as e:
err: Exception
if isinstance(e, (TimeoutError, httpx.TimeoutException)):
err = ConnectionTimeout(
"Connection timed out during request", errors=(e,)
)
elif isinstance(e, ssl.SSLError):
err = TlsError(str(e), errors=(e,))
# Detect SSL errors for httpx v0.28.0+
# Needed until https://github.com/encode/httpx/issues/3350 is fixed
elif isinstance(e, httpx.ConnectError) and e.__cause__:
context = e.__cause__.__context__
if isinstance(context, ssl.SSLError):
err = TlsError(str(context), errors=(e,))
else:
err = ConnectionError(str(e), errors=(e,))
else:
err = ConnectionError(str(e), errors=(e,))
self._log_request(
method=method,
target=target,
headers=resolved_headers,
body=body,
exception=err,
)
raise err from e
meta = ApiResponseMeta(
resp.status_code,
resp.http_version.lstrip("HTTP/"),
HttpHeaders(resp.headers),
duration,
self.config,
)
self._log_request(
method=method,
target=target,
headers=resolved_headers,
body=body,
meta=meta,
response=response_body,
)
return NodeApiResponse(meta, response_body)
async def close(self) -> None: # type: ignore[override]
await self.client.aclose()
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