Merge branch 'develop' of github.com:matrix-org/synapse into timeout-federation-requests

1 files changed, 217 insertions, 0 deletions

diff --git a/contrib/cmdclient/http.py b/contrib/cmdclient/http.py
new file mode 100644
index 0000000000..869f782ec1
--- /dev/null
+++ b/contrib/cmdclient/http.py
@@ -0,0 +1,217 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014 OpenMarket Ltd
+#
+# Licensed 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.
+
+from twisted.web.client import Agent, readBody
+from twisted.web.http_headers import Headers
+from twisted.internet import defer, reactor
+
+from pprint import pformat
+
+import json
+import urllib
+
+
+class HttpClient(object):
+    """ Interface for talking json over http
+    """
+
+    def put_json(self, url, data):
+        """ Sends the specifed json data using PUT
+
+        Args:
+            url (str): The URL to PUT data to.
+            data (dict): A dict containing the data that will be used as
+                the request body. This will be encoded as JSON.
+
+        Returns:
+            Deferred: Succeeds when we get *any* HTTP response.
+
+            The result of the deferred is a tuple of `(code, response)`,
+            where `response` is a dict representing the decoded JSON body.
+        """
+        pass
+
+    def get_json(self, url, args=None):
+        """ Get's some json from the given host homeserver and path
+
+        Args:
+            url (str): The URL to GET data from.
+            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.
+
+        Returns:
+            Deferred: Succeeds when we get *any* HTTP response.
+
+            The result of the deferred is a tuple of `(code, response)`,
+            where `response` is a dict representing the decoded JSON body.
+        """
+        pass
+
+
+class TwistedHttpClient(HttpClient):
+    """ Wrapper around the twisted HTTP client api.
+
+    Attributes:
+        agent (twisted.web.client.Agent): The twisted Agent used to send the
+            requests.
+    """
+
+    def __init__(self):
+        self.agent = Agent(reactor)
+
+    @defer.inlineCallbacks
+    def put_json(self, url, data):
+        response = yield self._create_put_request(
+            url,
+            data,
+            headers_dict={"Content-Type": ["application/json"]}
+        )
+        body = yield readBody(response)
+        defer.returnValue((response.code, body))
+
+    @defer.inlineCallbacks
+    def get_json(self, url, args=None):
+        if args:
+            # generates a list of strings of form "k=v".
+            qs = urllib.urlencode(args, True)
+            url = "%s?%s" % (url, qs)
+        response = yield self._create_get_request(url)
+        body = yield readBody(response)
+        defer.returnValue(json.loads(body))
+
+    def _create_put_request(self, url, json_data, headers_dict={}):
+        """ Wrapper of _create_request to issue a PUT request
+        """
+
+        if "Content-Type" not in headers_dict:
+            raise defer.error(
+                RuntimeError("Must include Content-Type header for PUTs"))
+
+        return self._create_request(
+            "PUT",
+            url,
+            producer=_JsonProducer(json_data),
+            headers_dict=headers_dict
+        )
+
+    def _create_get_request(self, url, headers_dict={}):
+        """ Wrapper of _create_request to issue a GET request
+        """
+        return self._create_request(
+            "GET",
+            url,
+            headers_dict=headers_dict
+        )
+
+    @defer.inlineCallbacks
+    def do_request(self, method, url, data=None, qparams=None, jsonreq=True, headers={}):
+        if qparams:
+            url = "%s?%s" % (url, urllib.urlencode(qparams, True))
+
+        if jsonreq:
+            prod = _JsonProducer(data)
+            headers['Content-Type'] = ["application/json"];
+        else:
+            prod = _RawProducer(data)
+
+        if method in ["POST", "PUT"]:
+            response = yield self._create_request(method, url,
+                    producer=prod,
+                    headers_dict=headers)
+        else:
+            response = yield self._create_request(method, url)
+
+        body = yield readBody(response)
+        defer.returnValue(json.loads(body))
+
+    @defer.inlineCallbacks
+    def _create_request(self, method, url, producer=None, headers_dict={}):
+        """ Creates and sends a request to the given url
+        """
+        headers_dict["User-Agent"] = ["Synapse Cmd Client"]
+
+        retries_left = 5
+        print "%s to %s with headers %s" % (method, url, headers_dict)
+        if self.verbose and producer:
+            if "password" in producer.data:
+                temp = producer.data["password"]
+                producer.data["password"] = "[REDACTED]"
+                print json.dumps(producer.data, indent=4)
+                producer.data["password"] = temp
+            else:
+                print json.dumps(producer.data, indent=4)
+
+        while True:
+            try:
+                response = yield self.agent.request(
+                    method,
+                    url.encode("UTF8"),
+                    Headers(headers_dict),
+                    producer
+                )
+                break
+            except Exception as e:
+                print "uh oh: %s" % e
+                if retries_left:
+                    yield self.sleep(2 ** (5 - retries_left))
+                    retries_left -= 1
+                else:
+                    raise e
+
+        if self.verbose:
+            print "Status %s %s" % (response.code, response.phrase)
+            print pformat(list(response.headers.getAllRawHeaders()))
+        defer.returnValue(response)
+
+    def sleep(self, seconds):
+        d = defer.Deferred()
+        reactor.callLater(seconds, d.callback, seconds)
+        return d
+
+class _RawProducer(object):
+    def __init__(self, data):
+        self.data = data
+        self.body = data
+        self.length = len(self.body)
+
+    def startProducing(self, consumer):
+        consumer.write(self.body)
+        return defer.succeed(None)
+
+    def pauseProducing(self):
+        pass
+
+    def stopProducing(self):
+        pass
+
+class _JsonProducer(object):
+    """ Used by the twisted http client to create the HTTP body from json
+    """
+    def __init__(self, jsn):
+        self.data = jsn
+        self.body = json.dumps(jsn).encode("utf8")
+        self.length = len(self.body)
+
+    def startProducing(self, consumer):
+        consumer.write(self.body)
+        return defer.succeed(None)
+
+    def pauseProducing(self):
+        pass
+
+    def stopProducing(self):
+        pass
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