umputun / reproxy

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Build # 34050351647

Build Type

push

github

Committed by web-flow

Commit Message

fix: keep Content-Encoding on gzip-compressed error responses (#265)

* fix: keep Content-Encoding on compressed error responses

With gzip enabled, the file server's error path (custom or default 404,
416) drops Content-Encoding while the body still goes through the
compressing writer, so browsers render gzip bytes as text. The stdlib
file server clears the header on errors since Go 1.23.

gzipHandler now wraps the writer only when CompressHandler actually
compresses the request and restores the header on error statuses.
The wrapper exposes Flush and Unwrap so streamed responses still flush.

Related to #264

* test: read the flushed gzip chunk in full

* fix: recover panics inside the gzip layer

A panic unwinding through CompressHandler runs its deferred close, which
commits a 200 with an empty gzip body before the outer recoverer can
write the 500, and its error text then lands as a plaintext tail.
gzipHandler now wraps the next handler in a recoverer inside the
compressor, so the 500 goes out compressed and labeled.

* docs: backlog item for Recoverer swallowing ErrAbortHandler

Coverage Stats

22 of 24 new or added lines in 1 file covered. (91.67%)

1 existing line in 1 file now uncovered.

2696 of 3375 relevant lines covered (79.88%)

86.01 hits per line