From 796a4b74823b721c72de07e45718f05e78e1565d Mon Sep 17 00:00:00 2001 From: David Robertson Date: Tue, 31 Jan 2023 10:33:07 +0000 Subject: Prefer `type(x) is int` to `isinstance(x, int)` (#14945) * Perfer `type(x) is int` to `isinstance(x, int)` This covered all additional instances I could see where `x` was user-controlled. The remaining cases are ``` $ rg -s 'isinstance.*[^_]int' tests/replication/_base.py 576: if isinstance(obj, int): synapse/util/caches/stream_change_cache.py 136: assert isinstance(stream_pos, int) 214: assert isinstance(stream_pos, int) 246: assert isinstance(stream_pos, int) 267: assert isinstance(stream_pos, int) synapse/replication/tcp/external_cache.py 133: if isinstance(result, int): synapse/metrics/__init__.py 100: if isinstance(calls, (int, float)): synapse/handlers/appservice.py 262: assert isinstance(new_token, int) synapse/config/_util.py 62: if isinstance(p, int): ``` which cover metrics, logic related to `jsonschema`, and replication and data streams. AFAICS these are all internal to Synapse * Changelog --- changelog.d/14945.misc | 1 + synapse/config/_base.py | 72 +++++++++++++++++++++---------- synapse/config/cache.py | 4 +- synapse/config/server.py | 2 +- synapse/events/validator.py | 4 +- synapse/federation/federation_client.py | 2 +- synapse/handlers/message.py | 2 +- synapse/rest/admin/__init__.py | 2 +- synapse/rest/admin/registration_tokens.py | 15 +++---- synapse/rest/admin/users.py | 6 +-- synapse/rest/client/report_event.py | 2 +- synapse/rest/media/v1/oembed.py | 2 +- synapse/rest/media/v1/thumbnailer.py | 2 +- synapse/storage/databases/main/events.py | 6 +-- 14 files changed, 75 insertions(+), 47 deletions(-) create mode 100644 changelog.d/14945.misc diff --git a/changelog.d/14945.misc b/changelog.d/14945.misc new file mode 100644 index 0000000000..654174f9a8 --- /dev/null +++ b/changelog.d/14945.misc @@ -0,0 +1 @@ +Fix various long-standing bugs in Synapse's config, event and request handling where booleans were unintentionally accepted where an integer was expected. diff --git a/synapse/config/_base.py b/synapse/config/_base.py index 1f6362aedd..2ce60610ca 100644 --- a/synapse/config/_base.py +++ b/synapse/config/_base.py @@ -174,15 +174,29 @@ class Config: @staticmethod def parse_size(value: Union[str, int]) -> int: - if isinstance(value, int): + """Interpret `value` as a number of bytes. + + If an integer is provided it is treated as bytes and is unchanged. + + String byte sizes can have a suffix of 'K' or `M`, representing kibibytes and + mebibytes respectively. No suffix is understood as a plain byte count. + + Raises: + TypeError, if given something other than an integer or a string + ValueError: if given a string not of the form described above. + """ + if type(value) is int: return value - sizes = {"K": 1024, "M": 1024 * 1024} - size = 1 - suffix = value[-1] - if suffix in sizes: - value = value[:-1] - size = sizes[suffix] - return int(value) * size + elif type(value) is str: + sizes = {"K": 1024, "M": 1024 * 1024} + size = 1 + suffix = value[-1] + if suffix in sizes: + value = value[:-1] + size = sizes[suffix] + return int(value) * size + else: + raise TypeError(f"Bad byte size {value!r}") @staticmethod def parse_duration(value: Union[str, int]) -> int: @@ -198,22 +212,36 @@ class Config: Returns: The number of milliseconds in the duration. + + Raises: + TypeError, if given something other than an integer or a string + ValueError: if given a string not of the form described above. """ - if isinstance(value, int): + if type(value) is int: return value - second = 1000 - minute = 60 * second - hour = 60 * minute - day = 24 * hour - week = 7 * day - year = 365 * day - sizes = {"s": second, "m": minute, "h": hour, "d": day, "w": week, "y": year} - size = 1 - suffix = value[-1] - if suffix in sizes: - value = value[:-1] - size = sizes[suffix] - return int(value) * size + elif type(value) is str: + second = 1000 + minute = 60 * second + hour = 60 * minute + day = 24 * hour + week = 7 * day + year = 365 * day + sizes = { + "s": second, + "m": minute, + "h": hour, + "d": day, + "w": week, + "y": year, + } + size = 1 + suffix = value[-1] + if suffix in sizes: + value = value[:-1] + size = sizes[suffix] + return int(value) * size + else: + raise TypeError(f"Bad duration {value!r}") @staticmethod def abspath(file_path: str) -> str: diff --git a/synapse/config/cache.py b/synapse/config/cache.py index 015b2a138e..05f69cb1ba 100644 --- a/synapse/config/cache.py +++ b/synapse/config/cache.py @@ -126,7 +126,7 @@ class CacheConfig(Config): cache_config = config.get("caches") or {} self.global_factor = cache_config.get("global_factor", _DEFAULT_FACTOR_SIZE) - if not isinstance(self.global_factor, (int, float)): + if type(self.global_factor) not in (int, float): raise ConfigError("caches.global_factor must be a number.") # Load cache factors from the config @@ -151,7 +151,7 @@ class CacheConfig(Config): ) for cache, factor in individual_factors.items(): - if not isinstance(factor, (int, float)): + if type(factor) not in (int, float): raise ConfigError( "caches.per_cache_factors.%s must be a number" % (cache,) ) diff --git a/synapse/config/server.py b/synapse/config/server.py index 80bcfa4080..ecdaa2d9dd 100644 --- a/synapse/config/server.py +++ b/synapse/config/server.py @@ -904,7 +904,7 @@ def parse_listener_def(num: int, listener: Any) -> ListenerConfig: raise ConfigError(DIRECT_TCP_ERROR, ("listeners", str(num), "type")) port = listener.get("port") - if not isinstance(port, int): + if type(port) is not int: raise ConfigError("Listener configuration is lacking a valid 'port' option") tls = listener.get("tls", False) diff --git a/synapse/events/validator.py b/synapse/events/validator.py index a6f0104396..fb1737b910 100644 --- a/synapse/events/validator.py +++ b/synapse/events/validator.py @@ -139,7 +139,7 @@ class EventValidator: max_lifetime = event.content.get("max_lifetime") if min_lifetime is not None: - if not isinstance(min_lifetime, int): + if type(min_lifetime) is not int: raise SynapseError( code=400, msg="'min_lifetime' must be an integer", @@ -147,7 +147,7 @@ class EventValidator: ) if max_lifetime is not None: - if not isinstance(max_lifetime, int): + if type(max_lifetime) is not int: raise SynapseError( code=400, msg="'max_lifetime' must be an integer", diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index f185b6c1f9..feb32e40e5 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -1864,7 +1864,7 @@ class TimestampToEventResponse: ) origin_server_ts = d.get("origin_server_ts") - if not isinstance(origin_server_ts, int): + if type(origin_server_ts) is not int: raise ValueError( "Invalid response: 'origin_server_ts' must be a int but received %r" % origin_server_ts diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 3278a695ed..6290f7f523 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -377,7 +377,7 @@ class MessageHandler: """ expiry_ts = event.content.get(EventContentFields.SELF_DESTRUCT_AFTER) - if not isinstance(expiry_ts, int) or event.is_state(): + if type(expiry_ts) is not int or event.is_state(): return # _schedule_expiry_for_event won't actually schedule anything if there's already diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py index fb73886df0..79f22a59f1 100644 --- a/synapse/rest/admin/__init__.py +++ b/synapse/rest/admin/__init__.py @@ -152,7 +152,7 @@ class PurgeHistoryRestServlet(RestServlet): logger.info("[purge] purging up to token %s (event_id %s)", token, event_id) elif "purge_up_to_ts" in body: ts = body["purge_up_to_ts"] - if not isinstance(ts, int): + if type(ts) is not int: raise SynapseError( HTTPStatus.BAD_REQUEST, "purge_up_to_ts must be an int", diff --git a/synapse/rest/admin/registration_tokens.py b/synapse/rest/admin/registration_tokens.py index af606e9252..95e751288b 100644 --- a/synapse/rest/admin/registration_tokens.py +++ b/synapse/rest/admin/registration_tokens.py @@ -143,7 +143,7 @@ class NewRegistrationTokenRestServlet(RestServlet): else: # Get length of token to generate (default is 16) length = body.get("length", 16) - if not isinstance(length, int): + if type(length) is not int: raise SynapseError( HTTPStatus.BAD_REQUEST, "length must be an integer", @@ -163,8 +163,7 @@ class NewRegistrationTokenRestServlet(RestServlet): uses_allowed = body.get("uses_allowed", None) if not ( - uses_allowed is None - or (isinstance(uses_allowed, int) and uses_allowed >= 0) + uses_allowed is None or (type(uses_allowed) is int and uses_allowed >= 0) ): raise SynapseError( HTTPStatus.BAD_REQUEST, @@ -173,13 +172,13 @@ class NewRegistrationTokenRestServlet(RestServlet): ) expiry_time = body.get("expiry_time", None) - if not isinstance(expiry_time, (int, type(None))): + if type(expiry_time) not in (int, type(None)): raise SynapseError( HTTPStatus.BAD_REQUEST, "expiry_time must be an integer or null", Codes.INVALID_PARAM, ) - if isinstance(expiry_time, int) and expiry_time < self.clock.time_msec(): + if type(expiry_time) is int and expiry_time < self.clock.time_msec(): raise SynapseError( HTTPStatus.BAD_REQUEST, "expiry_time must not be in the past", @@ -284,7 +283,7 @@ class RegistrationTokenRestServlet(RestServlet): uses_allowed = body["uses_allowed"] if not ( uses_allowed is None - or (isinstance(uses_allowed, int) and uses_allowed >= 0) + or (type(uses_allowed) is int and uses_allowed >= 0) ): raise SynapseError( HTTPStatus.BAD_REQUEST, @@ -295,13 +294,13 @@ class RegistrationTokenRestServlet(RestServlet): if "expiry_time" in body: expiry_time = body["expiry_time"] - if not isinstance(expiry_time, (int, type(None))): + if type(expiry_time) not in (int, type(None)): raise SynapseError( HTTPStatus.BAD_REQUEST, "expiry_time must be an integer or null", Codes.INVALID_PARAM, ) - if isinstance(expiry_time, int) and expiry_time < self.clock.time_msec(): + if type(expiry_time) is int and expiry_time < self.clock.time_msec(): raise SynapseError( HTTPStatus.BAD_REQUEST, "expiry_time must not be in the past", diff --git a/synapse/rest/admin/users.py b/synapse/rest/admin/users.py index 6e0c44be2a..0841b89c1a 100644 --- a/synapse/rest/admin/users.py +++ b/synapse/rest/admin/users.py @@ -973,7 +973,7 @@ class UserTokenRestServlet(RestServlet): body = parse_json_object_from_request(request, allow_empty_body=True) valid_until_ms = body.get("valid_until_ms") - if valid_until_ms and not isinstance(valid_until_ms, int): + if type(valid_until_ms) not in (int, type(None)): raise SynapseError( HTTPStatus.BAD_REQUEST, "'valid_until_ms' parameter must be an int" ) @@ -1125,14 +1125,14 @@ class RateLimitRestServlet(RestServlet): messages_per_second = body.get("messages_per_second", 0) burst_count = body.get("burst_count", 0) - if not isinstance(messages_per_second, int) or messages_per_second < 0: + if type(messages_per_second) is not int or messages_per_second < 0: raise SynapseError( HTTPStatus.BAD_REQUEST, "%r parameter must be a positive int" % (messages_per_second,), errcode=Codes.INVALID_PARAM, ) - if not isinstance(burst_count, int) or burst_count < 0: + if type(burst_count) is not int or burst_count < 0: raise SynapseError( HTTPStatus.BAD_REQUEST, "%r parameter must be a positive int" % (burst_count,), diff --git a/synapse/rest/client/report_event.py b/synapse/rest/client/report_event.py index 6e962a4532..e2b410cf32 100644 --- a/synapse/rest/client/report_event.py +++ b/synapse/rest/client/report_event.py @@ -54,7 +54,7 @@ class ReportEventRestServlet(RestServlet): "Param 'reason' must be a string", Codes.BAD_JSON, ) - if not isinstance(body.get("score", 0), int): + if type(body.get("score", 0)) is not int: raise SynapseError( HTTPStatus.BAD_REQUEST, "Param 'score' must be an integer", diff --git a/synapse/rest/media/v1/oembed.py b/synapse/rest/media/v1/oembed.py index a3738a6250..7592aa5d47 100644 --- a/synapse/rest/media/v1/oembed.py +++ b/synapse/rest/media/v1/oembed.py @@ -200,7 +200,7 @@ class OEmbedProvider: calc_description_and_urls(open_graph_response, oembed["html"]) for size in ("width", "height"): val = oembed.get(size) - if val is not None and isinstance(val, int): + if type(val) is int: open_graph_response[f"og:video:{size}"] = val elif oembed_type == "link": diff --git a/synapse/rest/media/v1/thumbnailer.py b/synapse/rest/media/v1/thumbnailer.py index a48a4de92a..9480cc5763 100644 --- a/synapse/rest/media/v1/thumbnailer.py +++ b/synapse/rest/media/v1/thumbnailer.py @@ -77,7 +77,7 @@ class Thumbnailer: image_exif = self.image._getexif() # type: ignore if image_exif is not None: image_orientation = image_exif.get(EXIF_ORIENTATION_TAG) - assert isinstance(image_orientation, int) + assert type(image_orientation) is int self.transpose_method = EXIF_TRANSPOSE_MAPPINGS.get(image_orientation) except Exception as e: # A lot of parsing errors can happen when parsing EXIF diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py index 0f097a2927..1536937b67 100644 --- a/synapse/storage/databases/main/events.py +++ b/synapse/storage/databases/main/events.py @@ -1651,7 +1651,7 @@ class PersistEventsStore: if self._ephemeral_messages_enabled: # If there's an expiry timestamp on the event, store it. expiry_ts = event.content.get(EventContentFields.SELF_DESTRUCT_AFTER) - if isinstance(expiry_ts, int) and not event.is_state(): + if type(expiry_ts) is int and not event.is_state(): self._insert_event_expiry_txn(txn, event.event_id, expiry_ts) # Insert into the room_memberships table. @@ -2133,10 +2133,10 @@ class PersistEventsStore: ): if ( "min_lifetime" in event.content - and not isinstance(event.content.get("min_lifetime"), int) + and type(event.content["min_lifetime"]) is not int ) or ( "max_lifetime" in event.content - and not isinstance(event.content.get("max_lifetime"), int) + and type(event.content["max_lifetime"]) is not int ): # Ignore the event if one of the value isn't an integer. return -- cgit 1.4.1