* fix(rewrite): fix cname target rewrite for CNAME chains
This fix corrects the cname target rewrite to handle CNAME chains:
- Preserves only the CNAME records before matching the rule
- Rewrites only the CNAME target that matches the rule
- Includes all records from the re-resolved upstream response
Signed-off-by: hide <hide@hide.net.eu.org>
* docs(rewrite): document how answer records are handled in CNAME target rewrite
Signed-off-by: hide <hide@hide.net.eu.org>
* fix(rewrite): simplify slice append per staticcheck S1011
Signed-off-by: hide <hide@hide.net.eu.org>
* docs(rewrite): add extra line between code and paragraph
Signed-off-by: hide <hide@hide.net.eu.org>
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Signed-off-by: hide <hide@hide.net.eu.org>
Co-authored-by: hide <hide@hide.net.eu.org>
This commit changes the CNAME rewrite rule to use a pre-compiled regexp
when the match type is RegexMatch instead of compiling it on-the-fly for
each request. This will also allow for invalid regexp patterns to be
identified during setup instead of causing a panic when the rule is
first invoked.
Signed-off-by: Charlie Vieth <charlie.vieth@gmail.com>
Update to the latest golangci-lint version and use built-in modernize
linter, instead of a custom CI step.
Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
Forward information that a upstream response is truncated when rewriting
a CNAME. Otherwise, the cache plugin stores the truncated resonse,
making it impossible to receive the full response as a client via TCP.
Signed-off-by: Yannick Epstein <yannicke@spotify.com>
