Mercurial > libervia-backend
view sat/tools/web.py @ 3847:aaa4e7815ba8
component AP gateway: new `verbose` attribute in AP gateway to activate debug logs:
when verbose is not null, object posted or returned on GET request are logged. Check
comments for vebosity level
author | Goffi <goffi@goffi.org> |
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date | Thu, 14 Jul 2022 12:55:30 +0200 |
parents | 65bac82e4049 |
children | 524856bd7b19 |
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#!/usr/bin/env python3 # Libervia: an XMPP client # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. from typing import Optional, Union from pathlib import Path from io import BufferedIOBase from OpenSSL import SSL import treq from treq.client import HTTPClient from twisted.internet import reactor, ssl from twisted.internet.interfaces import IOpenSSLClientConnectionCreator from twisted.web import iweb from twisted.web import client as http_client from zope.interface import implementer from sat.core import exceptions from sat.core.log import getLogger log = getLogger(__name__) SSLError = SSL.Error @implementer(IOpenSSLClientConnectionCreator) class NoCheckConnectionCreator(object): def __init__(self, hostname, ctx): self._ctx = ctx def clientConnectionForTLS(self, tlsProtocol): context = self._ctx connection = SSL.Connection(context, None) connection.set_app_data(tlsProtocol) return connection @implementer(iweb.IPolicyForHTTPS) class NoCheckContextFactory: """Context factory which doesn't do TLS certificate check /!\\ it's obvisously a security flaw to use this class, and it should be used only with explicit agreement from the end used """ def creatorForNetloc(self, hostname, port): log.warning( "TLS check disabled for {host} on port {port}".format( host=hostname, port=port ) ) certificateOptions = ssl.CertificateOptions(trustRoot=None) return NoCheckConnectionCreator(hostname, certificateOptions.getContext()) #: following treq doesn't check TLS, obviously it is unsecure and should not be used #: without explicit warning treq_client_no_ssl = HTTPClient(http_client.Agent(reactor, NoCheckContextFactory())) async def downloadFile( url: str, dest: Union[str, Path, BufferedIOBase], max_size: Optional[int] = None ) -> None: """Helper method to download a file This is for internal download, for high level download with progression, use ``plugin_misc_download``. Inspired from https://treq.readthedocs.io/en/latest/howto.html#handling-streaming-responses @param dest: destination filename or file-like object of it's a file-like object, you'll have to close it yourself @param max_size: if set, an exceptions.DataError will be raised if the downloaded file is bigger that given value (in bytes). """ if isinstance(dest, BufferedIOBase): f = dest must_close = False else: dest = Path(dest) f = dest.open("wb") must_close = True d = treq.get(url, unbuffered=True) written = 0 def write(data: bytes): if max_size is not None: nonlocal written written += len(data) if written > max_size: raise exceptions.DataError( "downloaded file is bigger than expected ({max_size})" ) f.write(data) d.addCallback(treq.collect, f.write) try: await d except exceptions.DataError as e: log.warning("download cancelled due to file oversized") raise e except Exception as e: log.error(f"Can't write file {dest}: {e}") raise e finally: if must_close: f.close()