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Merge pull request #628 from matrix-org/markjh/parse_json

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Add a parse_json_object function

to deduplicate all the copy+pasted _parse_json functions. Also document
the parse_.* functions.
This commit is contained in:
Mark Haines 2016-03-09 11:26:30 +00:00
commit b7b899cae6
11 changed files with 97 additions and 121 deletions
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70
synapse/http/servlet.py
View File

@ -15,14 +15,27 @@
""" This module contains base REST classes for constructing REST servlets. """
from synapse.api.errors import SynapseError
from synapse.api.errors import SynapseError, Codes
import logging
import simplejson
logger = logging.getLogger(__name__)
def parse_integer(request, name, default=None, required=False):
"""Parse an integer parameter from the request string
:param request: the twisted HTTP request.
:param name (str): the name of the query parameter.
:param default: value to use if the parameter is absent, defaults to None.
:param required (bool): whether to raise a 400 SynapseError if the
parameter is absent, defaults to False.
:return: An int value or the default.
:raises
SynapseError if the parameter is absent and required, or if the
parameter is present and not an integer.
"""
if name in request.args:
try:
return int(request.args[name][0])
@ -32,12 +45,25 @@ def parse_integer(request, name, default=None, required=False):
else:
if required:
message = "Missing integer query parameter %r" % (name,)
raise SynapseError(400, message)
raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
else:
return default
def parse_boolean(request, name, default=None, required=False):
"""Parse a boolean parameter from the request query string
:param request: the twisted HTTP request.
:param name (str): the name of the query parameter.
:param default: value to use if the parameter is absent, defaults to None.
:param required (bool): whether to raise a 400 SynapseError if the
parameter is absent, defaults to False.
:return: A bool value or the default.
:raises
SynapseError if the parameter is absent and required, or if the
parameter is present and not one of "true" or "false".
"""
if name in request.args:
try:
return {
@ -53,30 +79,64 @@ def parse_boolean(request, name, default=None, required=False):
else:
if required:
message = "Missing boolean query parameter %r" % (name,)
raise SynapseError(400, message)
raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
else:
return default
def parse_string(request, name, default=None, required=False,
allowed_values=None, param_type="string"):
"""Parse a string parameter from the request query string.
:param request: the twisted HTTP request.
:param name (str): the name of the query parameter.
:param default: value to use if the parameter is absent, defaults to None.
:param required (bool): whether to raise a 400 SynapseError if the
parameter is absent, defaults to False.
:param allowed_values (list): List of allowed values for the string,
or None if any value is allowed, defaults to None
:return: A string value or the default.
:raises
SynapseError if the parameter is absent and required, or if the
parameter is present, must be one of a list of allowed values and
is not one of those allowed values.
"""
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)
raise SynapseError(400, message)
else:
return value
else:
if required:
message = "Missing %s query parameter %r" % (param_type, name)
raise SynapseError(400, message)
raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
else:
return default
def parse_json_object_from_request(request):
"""Parse a JSON object from the body of a twisted HTTP request.
:param request: the twisted HTTP request.
:raises
SynapseError if the request body couldn't be decoded as JSON or
if it wasn't a JSON object.
"""
try:
content = simplejson.loads(request.content.read())
if type(content) != dict:
message = "Content must be a JSON object."
raise SynapseError(400, message, errcode=Codes.BAD_JSON)
return content
except simplejson.JSONDecodeError:
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
class RestServlet(object):
""" A Synapse REST Servlet.

16
synapse/rest/client/v1/directory.py
View File

@ -18,9 +18,10 @@ from twisted.internet import defer
from synapse.api.errors import AuthError, SynapseError, Codes
from synapse.types import RoomAlias
from synapse.http.servlet import parse_json_object_from_request
from .base import ClientV1RestServlet, client_path_patterns
import simplejson as json
import logging
@ -45,7 +46,7 @@ class ClientDirectoryServer(ClientV1RestServlet):
@defer.inlineCallbacks
def on_PUT(self, request, room_alias):
content = _parse_json(request)
content = parse_json_object_from_request(request)
if "room_id" not in content:
raise SynapseError(400, "Missing room_id key",
errcode=Codes.BAD_JSON)
@ -135,14 +136,3 @@ class ClientDirectoryServer(ClientV1RestServlet):
)
defer.returnValue((200, {}))
def _parse_json(request):
try:
content = json.loads(request.content.read())
if type(content) != dict:
raise SynapseError(400, "Content must be a JSON object.",
errcode=Codes.NOT_JSON)
return content
except ValueError:
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)

15
synapse/rest/client/v1/login.py
View File

@ -18,6 +18,7 @@ from twisted.internet import defer
from synapse.api.errors import SynapseError, LoginError, Codes
from synapse.types import UserID
from synapse.http.server import finish_request
from synapse.http.servlet import parse_json_object_from_request
from .base import ClientV1RestServlet, client_path_patterns
@ -79,7 +80,7 @@ class LoginRestServlet(ClientV1RestServlet):
@defer.inlineCallbacks
def on_POST(self, request):
login_submission = _parse_json(request)
login_submission = parse_json_object_from_request(request)
try:
if login_submission["type"] == LoginRestServlet.PASS_TYPE:
if not self.password_enabled:
@ -400,18 +401,6 @@ class CasTicketServlet(ClientV1RestServlet):
return (user, attributes)
def _parse_json(request):
try:
content = json.loads(request.content.read())
if type(content) != dict:
raise SynapseError(
400, "Content must be a JSON object.", errcode=Codes.BAD_JSON
)
return content
except ValueError:
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
def register_servlets(hs, http_server):
LoginRestServlet(hs).register(http_server)
if hs.config.saml2_enabled:

16
synapse/rest/client/v1/push_rule.py
View File

@ -16,7 +16,7 @@
from twisted.internet import defer
from synapse.api.errors import (
SynapseError, Codes, UnrecognizedRequestError, NotFoundError, StoreError
SynapseError, UnrecognizedRequestError, NotFoundError, StoreError
)
from .base import ClientV1RestServlet, client_path_patterns
from synapse.storage.push_rule import (
@ -25,8 +25,7 @@ from synapse.storage.push_rule import (
from synapse.push.clientformat import format_push_rules_for_user
from synapse.push.baserules import BASE_RULE_IDS
from synapse.push.rulekinds import PRIORITY_CLASS_MAP
import simplejson as json
from synapse.http.servlet import parse_json_object_from_request
class PushRuleRestServlet(ClientV1RestServlet):
@ -52,7 +51,7 @@ class PushRuleRestServlet(ClientV1RestServlet):
if '/' in spec['rule_id'] or '\\' in spec['rule_id']:
raise SynapseError(400, "rule_id may not contain slashes")
content = _parse_json(request)
content = parse_json_object_from_request(request)
user_id = requester.user.to_string()
@ -341,14 +340,5 @@ class InvalidRuleException(Exception):
pass
# XXX: C+ped from rest/room.py - surely this should be common?
def _parse_json(request):
try:
content = json.loads(request.content.read())
return content
except ValueError:
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
def register_servlets(hs, http_server):
PushRuleRestServlet(hs).register(http_server)

17
synapse/rest/client/v1/pusher.py
View File

@ -17,9 +17,10 @@ from twisted.internet import defer
from synapse.api.errors import SynapseError, Codes
from synapse.push import PusherConfigException
from synapse.http.servlet import parse_json_object_from_request
from .base import ClientV1RestServlet, client_path_patterns
import simplejson as json
import logging
logger = logging.getLogger(__name__)
@ -33,7 +34,7 @@ class PusherRestServlet(ClientV1RestServlet):
requester = yield self.auth.get_user_by_req(request)
user = requester.user
content = _parse_json(request)
content = parse_json_object_from_request(request)
pusher_pool = self.hs.get_pusherpool()
@ -92,17 +93,5 @@ class PusherRestServlet(ClientV1RestServlet):
return 200, {}
# XXX: C+ped from rest/room.py - surely this should be common?
def _parse_json(request):
try:
content = json.loads(request.content.read())
if type(content) != dict:
raise SynapseError(400, "Content must be a JSON object.",
errcode=Codes.NOT_JSON)
return content
except ValueError:
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
def register_servlets(hs, http_server):
PusherRestServlet(hs).register(http_server)

14
synapse/rest/client/v1/register.py
View File

@ -20,12 +20,12 @@ from synapse.api.errors import SynapseError, Codes
from synapse.api.constants import LoginType
from .base import ClientV1RestServlet, client_path_patterns
import synapse.util.stringutils as stringutils
from synapse.http.servlet import parse_json_object_from_request
from synapse.util.async import run_on_reactor
from hashlib import sha1
import hmac
import simplejson as json
import logging
logger = logging.getLogger(__name__)
@ -98,7 +98,7 @@ class RegisterRestServlet(ClientV1RestServlet):
@defer.inlineCallbacks
def on_POST(self, request):
register_json = _parse_json(request)
register_json = parse_json_object_from_request(request)
session = (register_json["session"]
if "session" in register_json else None)
@ -355,15 +355,5 @@ class RegisterRestServlet(ClientV1RestServlet):
)
def _parse_json(request):
try:
content = json.loads(request.content.read())
if type(content) != dict:
raise SynapseError(400, "Content must be a JSON object.")
return content
except ValueError:
raise SynapseError(400, "Content not JSON.")
def register_servlets(hs, http_server):
RegisterRestServlet(hs).register(http_server)

26
synapse/rest/client/v1/room.py
View File

@ -22,6 +22,7 @@ from synapse.streams.config import PaginationConfig
from synapse.api.constants import EventTypes, Membership
from synapse.types import UserID, RoomID, RoomAlias
from synapse.events.utils import serialize_event
from synapse.http.servlet import parse_json_object_from_request
import simplejson as json
import logging
@ -137,7 +138,7 @@ class RoomStateEventRestServlet(ClientV1RestServlet):
def on_PUT(self, request, room_id, event_type, state_key, txn_id=None):
requester = yield self.auth.get_user_by_req(request)
content = _parse_json(request)
content = parse_json_object_from_request(request)
event_dict = {
"type": event_type,
@ -179,7 +180,7 @@ class RoomSendEventRestServlet(ClientV1RestServlet):
@defer.inlineCallbacks
def on_POST(self, request, room_id, event_type, txn_id=None):
requester = yield self.auth.get_user_by_req(request, allow_guest=True)
content = _parse_json(request)
content = parse_json_object_from_request(request)
msg_handler = self.handlers.message_handler
event = yield msg_handler.create_and_send_nonmember_event(
@ -229,7 +230,7 @@ class JoinRoomAliasServlet(ClientV1RestServlet):
)
try:
content = _parse_json(request)
content = parse_json_object_from_request(request)
except:
# Turns out we used to ignore the body entirely, and some clients
# cheekily send invalid bodies.
@ -433,7 +434,7 @@ class RoomMembershipRestServlet(ClientV1RestServlet):
raise AuthError(403, "Guest access not allowed")
try:
content = _parse_json(request)
content = parse_json_object_from_request(request)
except:
# Turns out we used to ignore the body entirely, and some clients
# cheekily send invalid bodies.
@ -500,7 +501,7 @@ class RoomRedactEventRestServlet(ClientV1RestServlet):
@defer.inlineCallbacks
def on_POST(self, request, room_id, event_id, txn_id=None):
requester = yield self.auth.get_user_by_req(request)
content = _parse_json(request)
content = parse_json_object_from_request(request)
msg_handler = self.handlers.message_handler
event = yield msg_handler.create_and_send_nonmember_event(
@ -548,7 +549,7 @@ class RoomTypingRestServlet(ClientV1RestServlet):
room_id = urllib.unquote(room_id)
target_user = UserID.from_string(urllib.unquote(user_id))
content = _parse_json(request)
content = parse_json_object_from_request(request)
typing_handler = self.handlers.typing_notification_handler
@ -580,7 +581,7 @@ class SearchRestServlet(ClientV1RestServlet):
def on_POST(self, request):
requester = yield self.auth.get_user_by_req(request)
content = _parse_json(request)
content = parse_json_object_from_request(request)
batch = request.args.get("next_batch", [None])[0]
results = yield self.handlers.search_handler.search(
@ -592,17 +593,6 @@ class SearchRestServlet(ClientV1RestServlet):
defer.returnValue((200, results))
def _parse_json(request):
try:
content = json.loads(request.content.read())
if type(content) != dict:
raise SynapseError(400, "Content must be a JSON object.",
errcode=Codes.NOT_JSON)
return content
except ValueError:
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
def register_txn_path(servlet, regex_string, http_server, with_get=False):
"""Registers a transaction-based path.

22
synapse/rest/client/v2_alpha/_base.py
View File

@ -17,11 +17,9 @@
"""
from synapse.api.urls import CLIENT_V2_ALPHA_PREFIX
from synapse.api.errors import SynapseError
import re
import logging
import simplejson
logger = logging.getLogger(__name__)
@ -44,23 +42,3 @@ def client_v2_patterns(path_regex, releases=(0,)):
new_prefix = CLIENT_V2_ALPHA_PREFIX.replace("/v2_alpha", "/r%d" % release)
patterns.append(re.compile("^" + new_prefix + path_regex))
return patterns
def parse_request_allow_empty(request):
content = request.content.read()
if content is None or content == '':
return None
try:
return simplejson.loads(content)
except simplejson.JSONDecodeError:
raise SynapseError(400, "Content not JSON.")
def parse_json_dict_from_request(request):
try:
content = simplejson.loads(request.content.read())
if type(content) != dict:
raise SynapseError(400, "Content must be a JSON object.")
return content
except simplejson.JSONDecodeError:
raise SynapseError(400, "Content not JSON.")

8
synapse/rest/client/v2_alpha/account.py
View File

@ -17,10 +17,10 @@ from twisted.internet import defer
from synapse.api.constants import LoginType
from synapse.api.errors import LoginError, SynapseError, Codes
from synapse.http.servlet import RestServlet
from synapse.http.servlet import RestServlet, parse_json_object_from_request
from synapse.util.async import run_on_reactor
from ._base import client_v2_patterns, parse_json_dict_from_request
from ._base import client_v2_patterns
import logging
@ -41,7 +41,7 @@ class PasswordRestServlet(RestServlet):
def on_POST(self, request):
yield run_on_reactor()
body = parse_json_dict_from_request(request)
body = parse_json_object_from_request(request)
authed, result, params = yield self.auth_handler.check_auth([
[LoginType.PASSWORD],
@ -114,7 +114,7 @@ class ThreepidRestServlet(RestServlet):
def on_POST(self, request):
yield run_on_reactor()
body = parse_json_dict_from_request(request)
body = parse_json_object_from_request(request)
threePidCreds = body.get('threePidCreds')
threePidCreds = body.get('three_pid_creds', threePidCreds)

8
synapse/rest/client/v2_alpha/register.py
View File

@ -17,9 +17,9 @@ from twisted.internet import defer
from synapse.api.constants import LoginType
from synapse.api.errors import SynapseError, Codes, UnrecognizedRequestError
from synapse.http.servlet import RestServlet
from synapse.http.servlet import RestServlet, parse_json_object_from_request
from ._base import client_v2_patterns, parse_json_dict_from_request
from ._base import client_v2_patterns
import logging
import hmac
@ -73,7 +73,7 @@ class RegisterRestServlet(RestServlet):
ret = yield self.onEmailTokenRequest(request)
defer.returnValue(ret)
body = parse_json_dict_from_request(request)
body = parse_json_object_from_request(request)
# we do basic sanity checks here because the auth layer will store these
# in sessions. Pull out the username/password provided to us.
@ -236,7 +236,7 @@ class RegisterRestServlet(RestServlet):
@defer.inlineCallbacks
def onEmailTokenRequest(self, request):
body = parse_json_dict_from_request(request)
body = parse_json_object_from_request(request)
required = ['id_server', 'client_secret', 'email', 'send_attempt']
absent = []

6
synapse/rest/client/v2_alpha/tokenrefresh.py
View File

@ -16,9 +16,9 @@
from twisted.internet import defer
from synapse.api.errors import AuthError, StoreError, SynapseError
from synapse.http.servlet import RestServlet
from synapse.http.servlet import RestServlet, parse_json_object_from_request
from ._base import client_v2_patterns, parse_json_dict_from_request
from ._base import client_v2_patterns
class TokenRefreshRestServlet(RestServlet):
@ -35,7 +35,7 @@ class TokenRefreshRestServlet(RestServlet):
@defer.inlineCallbacks
def on_POST(self, request):
body = parse_json_dict_from_request(request)
body = parse_json_object_from_request(request)
try:
old_refresh_token = body["refresh_token"]
auth_handler = self.hs.get_handlers().auth_handler