mirror of https://github.com/zulip/zulip.git
28 lines
1.1 KiB
Python
28 lines
1.1 KiB
Python
import json
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from typing import Any, Dict, Iterator, Optional
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# Taken from
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# https://github.com/simplejson/simplejson/blob/8edc82afcf6f7512b05fba32baa536fe756bd273/simplejson/encoder.py#L378-L402
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# License: MIT
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class JSONEncoderForHTML(json.JSONEncoder):
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"""An encoder that produces JSON safe to embed in HTML.
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To embed JSON content in, say, a script tag on a web page, the
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characters &, < and > should be escaped. They cannot be escaped
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with the usual entities (e.g. &) because they are not expanded
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within <script> tags.
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"""
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def encode(self, o: Any) -> str:
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# Override JSONEncoder.encode because it has hacks for
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# performance that make things more complicated.
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chunks = self.iterencode(o, True)
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return ''.join(chunks)
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def iterencode(self, o: Any, _one_shot: bool=False) -> Iterator[str]:
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chunks = super().iterencode(o, _one_shot)
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for chunk in chunks:
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chunk = chunk.replace('&', '\\u0026')
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chunk = chunk.replace('<', '\\u003c')
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chunk = chunk.replace('>', '\\u003e')
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yield chunk
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