Use query-safe url fragment when returning an error #1733
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…test OAuth 2 security best practices
josephdecock
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This is a PR based off the work done in PR 1670, but with test coverage added.
From the original author of the original PR:
This PR adjusts the fragment that is added to error redirect responses, which is supposed to prevent browsers from reattaching existing ones.
The previous fragment
#_=_is an invalid query selector and can not be used as is on the receiving end, hence it has been adjusted to the recommended#_.Additionally, I adjusted the link to the respective latest active internet draft.
This looks like a minor thing, but one can run into issues caused by the browsers behavior of carrying along fragments.