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Add type annotations to SimpleHttpClient (#8372)

This commit is contained in:
Richard van der Hoff 2020-09-24 15:47:20 +01:00 committed by GitHub
parent 6fdf577593
commit 11c9e17738
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4 changed files with 143 additions and 61 deletions
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1
changelog.d/8372.misc Normal file
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@ -0,0 +1 @@
Add type annotations to `SimpleHttpClient`.

2
synapse/appservice/api.py
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@ -178,7 +178,7 @@ class ApplicationServiceApi(SimpleHttpClient):
urllib.parse.quote(protocol),
)
try:
info = await self.get_json(uri, {})
info = await self.get_json(uri)
if not _is_valid_3pe_metadata(info):
logger.warning(

187
synapse/http/client.py
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@ -17,6 +17,18 @@
import logging
import urllib
from io import BytesIO
from typing import (
Any,
BinaryIO,
Dict,
Iterable,
List,
Mapping,
Optional,
Sequence,
Tuple,
Union,
)
import treq
from canonicaljson import encode_canonical_json
@ -37,6 +49,7 @@ from twisted.web._newclient import ResponseDone
from twisted.web.client import Agent, HTTPConnectionPool, readBody
from twisted.web.http import PotentialDataLoss
from twisted.web.http_headers import Headers
from twisted.web.iweb import IResponse
from synapse.api.errors import Codes, HttpResponseException, SynapseError
from synapse.http import (
@ -57,6 +70,19 @@ incoming_responses_counter = Counter(
"synapse_http_client_responses", "", ["method", "code"]
)
# the type of the headers list, to be passed to the t.w.h.Headers.
# Actually we can mix str and bytes keys, but Mapping treats 'key' as invariant so
# we simplify.
RawHeaders = Union[Mapping[str, "RawHeaderValue"], Mapping[bytes, "RawHeaderValue"]]
# the value actually has to be a List, but List is invariant so we can't specify that
# the entries can either be Lists or bytes.
RawHeaderValue = Sequence[Union[str, bytes]]
# the type of the query params, to be passed into `urlencode`
QueryParamValue = Union[str, bytes, Iterable[Union[str, bytes]]]
QueryParams = Union[Mapping[str, QueryParamValue], Mapping[bytes, QueryParamValue]]
def check_against_blacklist(ip_address, ip_whitelist, ip_blacklist):
"""
@ -285,13 +311,26 @@ class SimpleHttpClient:
ip_blacklist=self._ip_blacklist,
)
async def request(self, method, uri, data=None, headers=None):
async def request(
self,
method: str,
uri: str,
data: Optional[bytes] = None,
headers: Optional[Headers] = None,
) -> IResponse:
"""
Args:
method (str): HTTP method to use.
uri (str): URI to query.
data (bytes): Data to send in the request body, if applicable.
headers (t.w.http_headers.Headers): Request headers.
method: HTTP method to use.
uri: URI to query.
data: Data to send in the request body, if applicable.
headers: Request headers.
Returns:
Response object, once the headers have been read.
Raises:
RequestTimedOutError if the request times out before the headers are read
"""
# A small wrapper around self.agent.request() so we can easily attach
# counters to it
@ -324,6 +363,8 @@ class SimpleHttpClient:
headers=headers,
**self._extra_treq_args
)
# we use our own timeout mechanism rather than treq's as a workaround
# for https://twistedmatrix.com/trac/ticket/9534.
request_deferred = timeout_deferred(
request_deferred,
60,
@ -353,18 +394,26 @@ class SimpleHttpClient:
set_tag("error_reason", e.args[0])
raise
async def post_urlencoded_get_json(self, uri, args={}, headers=None):
async def post_urlencoded_get_json(
self,
uri: str,
args: Mapping[str, Union[str, List[str]]] = {},
headers: Optional[RawHeaders] = None,
) -> Any:
"""
Args:
uri (str):
args (dict[str, str|List[str]]): query params
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
header name to a list of values for that header
uri: uri to query
args: parameters to be url-encoded in the body
headers: a map from header name to a list of values for that header
Returns:
object: parsed json
parsed json
Raises:
RequestTimedOutException: if there is a timeout before the response headers
are received. Note there is currently no timeout on reading the response
body.
HttpResponseException: On a non-2xx HTTP response.
ValueError: if the response was not JSON
@ -398,19 +447,24 @@ class SimpleHttpClient:
response.code, response.phrase.decode("ascii", errors="replace"), body
)
async def post_json_get_json(self, uri, post_json, headers=None):
async def post_json_get_json(
self, uri: str, post_json: Any, headers: Optional[RawHeaders] = None
) -> Any:
"""
Args:
uri (str):
post_json (object):
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
header name to a list of values for that header
uri: URI to query.
post_json: request body, to be encoded as json
headers: a map from header name to a list of values for that header
Returns:
object: parsed json
parsed json
Raises:
RequestTimedOutException: if there is a timeout before the response headers
are received. Note there is currently no timeout on reading the response
body.
HttpResponseException: On a non-2xx HTTP response.
ValueError: if the response was not JSON
@ -440,21 +494,22 @@ class SimpleHttpClient:
response.code, response.phrase.decode("ascii", errors="replace"), body
)
async def get_json(self, uri, args={}, headers=None):
""" Gets some json from the given URI.
async def get_json(
self, uri: str, args: QueryParams = {}, headers: Optional[RawHeaders] = None,
) -> Any:
"""Gets some json from the given URI.
Args:
uri (str): The URI to request, not including query parameters
args (dict): A dictionary used to create query strings, defaults to
None.
**Note**: The value of each key is assumed to be an iterable
and *not* a string.
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
header name to a list of values for that header
uri: The URI to request, not including query parameters
args: A dictionary used to create query string
headers: a map from header name to a list of values for that header
Returns:
Succeeds when we get *any* 2xx HTTP response, with the
HTTP body as JSON.
Succeeds when we get a 2xx HTTP response, with the HTTP body as JSON.
Raises:
RequestTimedOutException: if there is a timeout before the response headers
are received. Note there is currently no timeout on reading the response
body.
HttpResponseException On a non-2xx HTTP response.
ValueError: if the response was not JSON
@ -466,22 +521,27 @@ class SimpleHttpClient:
body = await self.get_raw(uri, args, headers=headers)
return json_decoder.decode(body.decode("utf-8"))
async def put_json(self, uri, json_body, args={}, headers=None):
""" Puts some json to the given URI.
async def put_json(
self,
uri: str,
json_body: Any,
args: QueryParams = {},
headers: RawHeaders = None,
) -> Any:
"""Puts some json to the given URI.
Args:
uri (str): The URI to request, not including query parameters
json_body (dict): The JSON to put in the HTTP body,
args (dict): A dictionary used to create query strings, defaults to
None.
**Note**: The value of each key is assumed to be an iterable
and *not* a string.
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
header name to a list of values for that header
uri: The URI to request, not including query parameters
json_body: The JSON to put in the HTTP body,
args: A dictionary used to create query strings
headers: a map from header name to a list of values for that header
Returns:
Succeeds when we get *any* 2xx HTTP response, with the
HTTP body as JSON.
Succeeds when we get a 2xx HTTP response, with the HTTP body as JSON.
Raises:
RequestTimedOutException: if there is a timeout before the response headers
are received. Note there is currently no timeout on reading the response
body.
HttpResponseException On a non-2xx HTTP response.
ValueError: if the response was not JSON
@ -513,21 +573,23 @@ class SimpleHttpClient:
response.code, response.phrase.decode("ascii", errors="replace"), body
)
async def get_raw(self, uri, args={}, headers=None):
""" Gets raw text from the given URI.
async def get_raw(
self, uri: str, args: QueryParams = {}, headers: Optional[RawHeaders] = None
) -> bytes:
"""Gets raw text from the given URI.
Args:
uri (str): The URI to request, not including query parameters
args (dict): A dictionary used to create query strings, defaults to
None.
**Note**: The value of each key is assumed to be an iterable
and *not* a string.
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
header name to a list of values for that header
uri: The URI to request, not including query parameters
args: A dictionary used to create query strings
headers: a map from header name to a list of values for that header
Returns:
Succeeds when we get *any* 2xx HTTP response, with the
Succeeds when we get a 2xx HTTP response, with the
HTTP body as bytes.
Raises:
RequestTimedOutException: if there is a timeout before the response headers
are received. Note there is currently no timeout on reading the response
body.
HttpResponseException on a non-2xx HTTP response.
"""
if len(args):
@ -552,16 +614,29 @@ class SimpleHttpClient:
# XXX: FIXME: This is horribly copy-pasted from matrixfederationclient.
# The two should be factored out.
async def get_file(self, url, output_stream, max_size=None, headers=None):
async def get_file(
self,
url: str,
output_stream: BinaryIO,
max_size: Optional[int] = None,
headers: Optional[RawHeaders] = None,
) -> Tuple[int, Dict[bytes, List[bytes]], str, int]:
"""GETs a file from a given URL
Args:
url (str): The URL to GET
output_stream (file): File to write the response body to.
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
header name to a list of values for that header
url: The URL to GET
output_stream: File to write the response body to.
headers: A map from header name to a list of values for that header
Returns:
A (int,dict,string,int) tuple of the file length, dict of the response
A tuple of the file length, dict of the response
headers, absolute URI of the response and HTTP response code.
Raises:
RequestTimedOutException: if there is a timeout before the response headers
are received. Note there is currently no timeout on reading the response
body.
SynapseError: if the response is not a 2xx, the remote file is too large, or
another exception happens during the download.
"""
actual_headers = {b"User-Agent": [self.user_agent]}

14
synapse/rest/media/v1/preview_url_resource.py
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@ -450,7 +450,7 @@ class PreviewUrlResource(DirectServeJsonResource):
logger.warning("Error downloading oEmbed metadata from %s: %r", url, e)
raise OEmbedError() from e
async def _download_url(self, url, user):
async def _download_url(self, url: str, user):
# TODO: we should probably honour robots.txt... except in practice
# we're most likely being explicitly triggered by a human rather than a
# bot, so are we really a robot?
@ -460,7 +460,7 @@ class PreviewUrlResource(DirectServeJsonResource):
file_info = FileInfo(server_name=None, file_id=file_id, url_cache=True)
# If this URL can be accessed via oEmbed, use that instead.
url_to_download = url
url_to_download = url # type: Optional[str]
oembed_url = self._get_oembed_url(url)
if oembed_url:
# The result might be a new URL to download, or it might be HTML content.
@ -520,9 +520,15 @@ class PreviewUrlResource(DirectServeJsonResource):
# FIXME: we should calculate a proper expiration based on the
# Cache-Control and Expire headers. But for now, assume 1 hour.
expires = ONE_HOUR
etag = headers["ETag"][0] if "ETag" in headers else None
etag = (
headers[b"ETag"][0].decode("ascii") if b"ETag" in headers else None
)
else:
html_bytes = oembed_result.html.encode("utf-8") # type: ignore
# we can only get here if we did an oembed request and have an oembed_result.html
assert oembed_result.html is not None
assert oembed_url is not None
html_bytes = oembed_result.html.encode("utf-8")
with self.media_storage.store_into_file(file_info) as (f, fname, finish):
f.write(html_bytes)
await finish()