129 lines
3.8 KiB
Python
129 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer, reactor
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from twisted.web.client import (
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Agent, readBody, FileBodyProducer, PartialDownloadError
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)
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from twisted.web.http_headers import Headers
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from StringIO import StringIO
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import json
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import logging
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import urllib
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logger = logging.getLogger(__name__)
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class SimpleHttpClient(object):
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"""
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A simple, no-frills HTTP client with methods that wrap up common ways of
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using HTTP in Matrix
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"""
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def __init__(self, hs):
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self.hs = hs
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# The default context factory in Twisted 14.0.0 (which we require) is
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# BrowserLikePolicyForHTTPS which will do regular cert validation
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# 'like a browser'
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self.agent = Agent(reactor)
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@defer.inlineCallbacks
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def post_urlencoded_get_json(self, uri, args={}):
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logger.debug("post_urlencoded_get_json args: %s", args)
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query_bytes = urllib.urlencode(args, True)
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response = yield self.agent.request(
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"POST",
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uri.encode("ascii"),
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headers=Headers({
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"Content-Type": ["application/x-www-form-urlencoded"]
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}),
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bodyProducer=FileBodyProducer(StringIO(query_bytes))
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)
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body = yield readBody(response)
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defer.returnValue(json.loads(body))
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@defer.inlineCallbacks
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def get_json(self, uri, args={}):
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""" Get's some json from the given host and path
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Args:
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uri (str): The URI to request, not including query parameters
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args (dict): A dictionary used to create query strings, defaults to
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None.
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**Note**: The value of each key is assumed to be an iterable
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and *not* a string.
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Returns:
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Deferred: Succeeds when we get *any* HTTP response.
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The result of the deferred is a tuple of `(code, response)`,
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where `response` is a dict representing the decoded JSON body.
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"""
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yield
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if len(args):
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query_bytes = urllib.urlencode(args, True)
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uri = "%s?%s" % (uri, query_bytes)
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response = yield self.agent.request(
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"GET",
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uri.encode("ascii"),
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)
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body = yield readBody(response)
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defer.returnValue(json.loads(body))
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class CaptchaServerHttpClient(SimpleHttpClient):
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"""
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Separate HTTP client for talking to google's captcha servers
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Only slightly special because accepts partial download responses
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"""
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@defer.inlineCallbacks
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def post_urlencoded_get_raw(self, url, args={}):
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query_bytes = urllib.urlencode(args, True)
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response = yield self.agent.request(
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"POST",
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url.encode("ascii"),
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bodyProducer=FileBodyProducer(StringIO(query_bytes)),
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headers=Headers({
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"Content-Type": ["application/x-www-form-urlencoded"]
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})
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)
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try:
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body = yield readBody(response)
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defer.returnValue(body)
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except PartialDownloadError as e:
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# twisted dislikes google's response, no content length.
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defer.returnValue(e.response)
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def _print_ex(e):
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if hasattr(e, "reasons") and e.reasons:
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for ex in e.reasons:
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_print_ex(ex)
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else:
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logger.exception(e)
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