Fix isDotDot to recognize ..%2e and %2e.. path segments#9453
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HttpUrl.resolve() left ..%2e and %2e.. in the encoded path instead of normalizing them like other percent-encoded dot-dot forms. This could bypass path-prefix sandbox checks that rely on encodedPath(). Fixes square#9451 Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
HttpUrl.Builder.isDotDot()to treat..%2eand%2e..as dot-dot segments, matching RFC 3986 §6.2.2.3 normalization semantics already applied to%2e.,.%2e, and%2e%2e.HttpUrlTest.relativePath()for the missing encoded forms (including uppercase%2Evariants).Fixes #9451
Problem
HttpUrl.resolve()left..%2eand%2e..in the encoded path instead of collapsing them. Code that validatesencodedPath()against a prefix (e.g./static/) could be bypassed when downstream components percent-decode%2elater.Test plan
./gradlew :okhttp:jvmTest --tests "okhttp3.HttpUrlTest.relativePath"base.resolve("..%2e")andbase.resolve("%2e..")normalize to the parent path instead of leaving literal encoded segmentsMade with Cursor