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Chenx Dust
1a0e8c7a44
* fix(proxy): decompress Codex request body before forward, support zstd Codex Desktop sends zstd-compressed request bodies when authenticated against the Codex backend, which broke local proxy routing because the handlers parsed the raw bytes with serde_json directly. Reworked on top of current main so it preserves the response_processor behavior that landed after this PR was first opened: - Extract content-encoding helpers into a shared proxy::content_encoding module. decompress_body keeps returning Option<Vec<u8>> so unknown encodings stay pass-through with their content-encoding header intact, and keeps the deflate zlib-then-raw fallback (RFC 9110). - Add zstd/zst support (zstd 0.13) and disable reqwest's auto zstd decompression via .no_zstd() for parity with gzip/br/deflate. - Decompress the request body before JSON parsing in the three Codex handlers (chat_completions / responses / responses_compact) and strip the stale content-encoding / content-length / transfer-encoding headers so the forwarder regenerates them. - Support stacked codings (e.g. "gzip, zstd") by decoding in reverse order and merge repeated Content-Encoding headers via get_all. Fixes #3764 Fixes #3696 Co-authored-by: chenx-dust <16610294+chenx-dust@users.noreply.github.com> * fix(proxy): decompress upstream error bodies before reading them The forwarder error branch consumes non-2xx responses via String::from_utf8 directly, bypassing read_decoded_body. reqwest has no auto-decompression feature enabled, so a compressed error body (gzip/br/deflate/zstd) arrives as raw bytes, fails from_utf8, and gets dropped, hiding upstream rate-limit and auth details from the client. Decode the error body with the shared proxy::content_encoding helper, mirroring the success path. Falls back to the raw bytes when the encoding is unsupported or decoding fails. Co-authored-by: chenx-dust <16610294+chenx-dust@users.noreply.github.com> --------- Co-authored-by: Jason <farion1231@gmail.com> Co-authored-by: chenx-dust <16610294+chenx-dust@users.noreply.github.com>