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Combine the request wrappers in rest/media/v1 and http/server into a single wrapper decorator

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This commit is contained in:
Mark Haines 2015-04-21 16:35:53 +01:00
parent 1ebff9736b
commit 1967650bc4
7 changed files with 140 additions and 198 deletions
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15
synapse/http/server.py
View File

@ -57,9 +57,18 @@ _next_request_id = 0
def request_handler(request_handler):
"""Wraps a method that acts as a request handler with the necessary logging
and exception handling.
The method must have a signature of "handle_foo(self, request)".
The argument "self" must have "version_string" and "clock" attributes.
The argument "request" must be a twisted HTTP request.
The method must have a signature of "handle_foo(self, request)". The
argument "self" must have "version_string" and "clock" attributes. The
argument "request" must be a twisted HTTP request.
The method must return a deferred. If the deferred succeeds we assume that
a response has been sent. If the deferred fails with a SynapseError we use
it to send a JSON response with the appropriate HTTP reponse code. If the
deferred fails with any other type of error we send a 500 reponse.
We insert a unique request-id into the logging context for this request and
log the response and duration for this request.
"""
@defer.inlineCallbacks

110
synapse/http/servlet.py
View File

@ -23,6 +23,61 @@ import logging
logger = logging.getLogger(__name__)
def parse_integer(request, name, default=None, required=False):
if name in request.args:
try:
return int(request.args[name][0])
except:
message = "Query parameter %r must be an integer" % (name,)
raise SynapseError(400, message)
else:
if required:
message = "Missing integer query parameter %r" % (name,)
raise SynapseError(400, message)
else:
return default
def parse_boolean(request, name, default=None, required=False):
if name in request.args:
try:
return {
"true": True,
"false": False,
}[request.args[name][0]]
except:
message = (
"Boolean query parameter %r must be one of"
" ['true', 'false']"
) % (name,)
raise SynapseError(400, message)
else:
if required:
message = "Missing boolean query parameter %r" % (name,)
raise SynapseError(400, message)
else:
return default
def parse_string(request, name, default=None, required=False,
allowed_values=None, param_type="string"):
if name in request.args:
value = request.args[name][0]
if allowed_values is not None and value not in allowed_values:
message = "Query parameter %r must be one of [%s]" % (
name, ", ".join(repr(v) for v in allowed_values)
)
raise SynapseError(message)
else:
return value
else:
if required:
message = "Missing %s query parameter %r" % (param_type, name)
raise SynapseError(400, message)
else:
return default
class RestServlet(object):
""" A Synapse REST Servlet.
@ -56,58 +111,3 @@ class RestServlet(object):
http_server.register_path(method, pattern, method_handler)
else:
raise NotImplementedError("RestServlet must register something.")
@staticmethod
def parse_integer(request, name, default=None, required=False):
if name in request.args:
try:
return int(request.args[name][0])
except:
message = "Query parameter %r must be an integer" % (name,)
raise SynapseError(400, message)
else:
if required:
message = "Missing integer query parameter %r" % (name,)
raise SynapseError(400, message)
else:
return default
@staticmethod
def parse_boolean(request, name, default=None, required=False):
if name in request.args:
try:
return {
"true": True,
"false": False,
}[request.args[name][0]]
except:
message = (
"Boolean query parameter %r must be one of"
" ['true', 'false']"
) % (name,)
raise SynapseError(400, message)
else:
if required:
message = "Missing boolean query parameter %r" % (name,)
raise SynapseError(400, message)
else:
return default
@staticmethod
def parse_string(request, name, default=None, required=False,
allowed_values=None, param_type="string"):
if name in request.args:
value = request.args[name][0]
if allowed_values is not None and value not in allowed_values:
message = "Query parameter %r must be one of [%s]" % (
name, ", ".join(repr(v) for v in allowed_values)
)
raise SynapseError(message)
else:
return value
else:
if required:
message = "Missing %s query parameter %r" % (param_type, name)
raise SynapseError(400, message)
else:
return default

20
synapse/rest/client/v2_alpha/sync.py
View File

@ -15,7 +15,9 @@
from twisted.internet import defer
from synapse.http.servlet import RestServlet
from synapse.http.servlet import (
RestServlet, parse_string, parse_integer, parse_boolean
)
from synapse.handlers.sync import SyncConfig
from synapse.types import StreamToken
from synapse.events.utils import (
@ -87,20 +89,20 @@ class SyncRestServlet(RestServlet):
def on_GET(self, request):
user, client = yield self.auth.get_user_by_req(request)
timeout = self.parse_integer(request, "timeout", default=0)
limit = self.parse_integer(request, "limit", required=True)
gap = self.parse_boolean(request, "gap", default=True)
sort = self.parse_string(
timeout = parse_integer(request, "timeout", default=0)
limit = parse_integer(request, "limit", required=True)
gap = parse_boolean(request, "gap", default=True)
sort = parse_string(
request, "sort", default="timeline,asc",
allowed_values=self.ALLOWED_SORT
)
since = self.parse_string(request, "since")
set_presence = self.parse_string(
since = parse_string(request, "since")
set_presence = parse_string(
request, "set_presence", default="online",
allowed_values=self.ALLOWED_PRESENCE
)
backfill = self.parse_boolean(request, "backfill", default=False)
filter_id = self.parse_string(request, "filter", default=None)
backfill = parse_boolean(request, "backfill", default=False)
filter_id = parse_string(request, "filter", default=None)
logger.info(
"/sync: user=%r, timeout=%r, limit=%r, gap=%r, sort=%r, since=%r,"

80
synapse/rest/media/v1/base_resource.py
View File

@ -18,7 +18,7 @@ from .thumbnailer import Thumbnailer
from synapse.http.server import respond_with_json
from synapse.util.stringutils import random_string
from synapse.api.errors import (
cs_exception, CodeMessageException, cs_error, Codes, SynapseError
cs_error, Codes, SynapseError
)
from twisted.internet import defer
@ -32,6 +32,18 @@ import logging
logger = logging.getLogger(__name__)
def parse_media_id(request):
try:
server_name, media_id = request.postpath
return (server_name, media_id)
except:
raise SynapseError(
404,
"Invalid media id token %r" % (request.postpath,),
Codes.UNKNOWN,
)
class BaseMediaResource(Resource):
isLeaf = True
@ -47,72 +59,6 @@ class BaseMediaResource(Resource):
self.filepaths = filepaths
self.downloads = {}
@staticmethod
def catch_errors(request_handler):
@defer.inlineCallbacks
def wrapped_request_handler(self, request):
try:
yield request_handler(self, request)
except CodeMessageException as e:
logger.info("Responding with error: %r", e)
respond_with_json(
request, e.code, cs_exception(e), send_cors=True
)
except:
logger.exception(
"Failed handle request %s.%s on %r",
request_handler.__module__,
request_handler.__name__,
self,
)
respond_with_json(
request,
500,
{"error": "Internal server error"},
send_cors=True
)
return wrapped_request_handler
@staticmethod
def _parse_media_id(request):
try:
server_name, media_id = request.postpath
return (server_name, media_id)
except:
raise SynapseError(
404,
"Invalid media id token %r" % (request.postpath,),
Codes.UNKNOWN,
)
@staticmethod
def _parse_integer(request, arg_name, default=None):
try:
if default is None:
return int(request.args[arg_name][0])
else:
return int(request.args.get(arg_name, [default])[0])
except:
raise SynapseError(
400,
"Missing integer argument %r" % (arg_name,),
Codes.UNKNOWN,
)
@staticmethod
def _parse_string(request, arg_name, default=None):
try:
if default is None:
return request.args[arg_name][0]
else:
return request.args.get(arg_name, [default])[0]
except:
raise SynapseError(
400,
"Missing string argument %r" % (arg_name,),
Codes.UNKNOWN,
)
def _respond_404(self, request):
respond_with_json(
request, 404,

12
synapse/rest/media/v1/download_resource.py
View File

@ -13,7 +13,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from .base_resource import BaseMediaResource
from .base_resource import BaseMediaResource, parse_media_id
from synapse.http.server import request_handler
from twisted.web.server import NOT_DONE_YET
from twisted.internet import defer
@ -28,15 +29,10 @@ class DownloadResource(BaseMediaResource):
self._async_render_GET(request)
return NOT_DONE_YET
@BaseMediaResource.catch_errors
@request_handler
@defer.inlineCallbacks
def _async_render_GET(self, request):
try:
server_name, media_id = request.postpath
except:
self._respond_404(request)
return
server_name, media_id = parse_media_id(request)
if server_name == self.server_name:
yield self._respond_local_file(request, media_id)
else:

16
synapse/rest/media/v1/thumbnail_resource.py
View File

@ -14,7 +14,9 @@
# limitations under the License.
from .base_resource import BaseMediaResource
from .base_resource import BaseMediaResource, parse_media_id
from synapse.http.servlet import parse_string, parse_integer
from synapse.http.server import request_handler
from twisted.web.server import NOT_DONE_YET
from twisted.internet import defer
@ -31,14 +33,14 @@ class ThumbnailResource(BaseMediaResource):
self._async_render_GET(request)
return NOT_DONE_YET
@BaseMediaResource.catch_errors
@request_handler
@defer.inlineCallbacks
def _async_render_GET(self, request):
server_name, media_id = self._parse_media_id(request)
width = self._parse_integer(request, "width")
height = self._parse_integer(request, "height")
method = self._parse_string(request, "method", "scale")
m_type = self._parse_string(request, "type", "image/png")
server_name, media_id = parse_media_id(request)
width = parse_integer(request, "width")
height = parse_integer(request, "height")
method = parse_string(request, "method", "scale")
m_type = parse_string(request, "type", "image/png")
if server_name == self.server_name:
yield self._respond_local_thumbnail(

19
synapse/rest/media/v1/upload_resource.py
View File

@ -13,12 +13,10 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from synapse.http.server import respond_with_json
from synapse.http.server import respond_with_json, request_handler
from synapse.util.stringutils import random_string
from synapse.api.errors import (
cs_exception, SynapseError, CodeMessageException
)
from synapse.api.errors import SynapseError
from twisted.web.server import NOT_DONE_YET
from twisted.internet import defer
@ -69,9 +67,9 @@ class UploadResource(BaseMediaResource):
defer.returnValue("mxc://%s/%s" % (self.server_name, media_id))
@request_handler
@defer.inlineCallbacks
def _async_render_POST(self, request):
try:
auth_user, client = yield self.auth.get_user_by_req(request)
# TODO: The checks here are a bit late. The content will have
# already been uploaded to a tmp file at this point
@ -108,14 +106,3 @@ class UploadResource(BaseMediaResource):
respond_with_json(
request, 200, {"content_uri": content_uri}, send_cors=True
)
except CodeMessageException as e:
logger.exception(e)
respond_with_json(request, e.code, cs_exception(e), send_cors=True)
except:
logger.exception("Failed to store file")
respond_with_json(
request,
500,
{"error": "Internal server error"},
send_cors=True
)