Files
spend-sparrow/internal/handler/middleware/gzip.go
Tim Wundenberg 661a3ba79f
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fix(observabillity): include otel logs
2025-06-07 15:20:16 +02:00

40 lines
791 B
Go

package middleware
import (
"compress/gzip"
"errors"
"io"
"log/slog"
"net/http"
"strings"
)
type gzipResponseWriter struct {
io.Writer
http.ResponseWriter
}
func (w gzipResponseWriter) Write(b []byte) (int, error) {
return w.Writer.Write(b)
}
func Gzip(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
next.ServeHTTP(w, r)
return
}
w.Header().Set("Content-Encoding", "gzip")
gz := gzip.NewWriter(w)
wrapper := gzipResponseWriter{Writer: gz, ResponseWriter: w}
next.ServeHTTP(wrapper, r)
err := gz.Close()
if err != nil && !errors.Is(err, http.ErrBodyNotAllowed) {
slog.Error("Gzip: could not close Writer", "err", err)
}
})
}