Use NSURLComponents to properly encode tokens - #618
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August 7, 2026 23:09
Assemble the token revocation URL from components and query items rather than by string formatting, so the token and the logging parameters are percent-encoded rather than interpolated raw into a URL string.
Assemble the user info URL from components and query items so the access token is percent-encoded rather than interpolated raw into a URL string, matching the revoke URL construction.
Revoke a token containing "&", "=" and "#" and assert it round-trips through the revoke URL intact, along with the logging parameters. Against the previous string-formatted URL this fails: the token is truncated at the "&" and both logging parameters are lost to the fragment.
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The two URLs here interpolated tokens into the query strings, and then called
urlWithString:. An &, #, =, or plausibly + in a token would break the URL. RFC 6750 & RFC 6749 define the bearer & access tokens such that "=" and "+" are allowed (and the access token allows even more characters).This PR addresses the non-"+" characters, as Foundation inexplicably doesn't escape "+".