61 lines
2.0 KiB
Python
61 lines
2.0 KiB
Python
# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import typing
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from cloudevents.sdk import types
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from cloudevents.sdk.converters import base
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from cloudevents.sdk.converters.util import has_binary_headers
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from cloudevents.sdk.event import base as event_base
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# TODO: Singleton?
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class JSONHTTPCloudEventConverter(base.Converter):
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TYPE = "structured"
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MIME_TYPE = "application/cloudevents+json"
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def can_read(
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self, content_type: str, headers: typing.Dict[str, str] = {}
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) -> bool:
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return (
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isinstance(content_type, str)
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and content_type.startswith(self.MIME_TYPE)
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or not has_binary_headers(headers)
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)
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def event_supported(self, event: object) -> bool:
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# structured format supported by both spec 0.1 and 0.2
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return True
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def read(
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self,
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event: event_base.BaseEvent,
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headers: dict,
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body: typing.IO,
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data_unmarshaller: types.UnmarshallerType,
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) -> event_base.BaseEvent:
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event.UnmarshalJSON(body, data_unmarshaller)
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return event
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def write(
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self, event: event_base.BaseEvent, data_marshaller: types.MarshallerType
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) -> typing.Tuple[dict, bytes]:
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http_headers = {"content-type": self.MIME_TYPE}
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return http_headers, event.MarshalJSON(data_marshaller).encode("utf-8")
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def NewJSONHTTPCloudEventConverter() -> JSONHTTPCloudEventConverter:
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return JSONHTTPCloudEventConverter()
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