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package logger
import (
"log/slog"
"net/http"
"runtime/debug"
"strconv"
"time"
)
func Middleware(next http.Handler, recordBody bool) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" && r.URL.Path == "/healthz" {
next.ServeHTTP(w, r)
return
}
defer func() {
if err := recover(); err != nil {
w.WriteHeader(http.StatusInternalServerError)
slog.Error(
"panic",
"err", err,
"trace", string(debug.Stack()),
)
}
}()
start := time.Now()
path := r.URL.Path
query := r.URL.RawQuery
bw := newBodyWriter(w, recordBody)
next.ServeHTTP(bw, r)
end := time.Now()
requestAttributes := []slog.Attr{
slog.Time("time", start.UTC()),
slog.String("method", r.Method),
slog.String("host", r.Host),
slog.String("path", path),
slog.String("query", query),
slog.String("ip", r.RemoteAddr),
}
responseAttributes := []slog.Attr{
slog.Time("time", end.UTC()),
slog.Duration("latency", end.Sub(start)),
slog.Int("length", bw.bytes),
slog.Int("status", bw.status),
}
if recordBody {
responseAttributes = append(responseAttributes, slog.String("body", bw.body.String()))
}
attributes := []slog.Attr{
{
Key: "request",
Value: slog.GroupValue(requestAttributes...),
},
{
Key: "response",
Value: slog.GroupValue(responseAttributes...),
},
}
level := slog.LevelInfo
if bw.status >= http.StatusInternalServerError {
level = slog.LevelError
} else if bw.status >= http.StatusBadRequest && bw.status < http.StatusInternalServerError {
level = slog.LevelWarn
}
slog.LogAttrs(r.Context(), level, strconv.Itoa(bw.status)+": "+http.StatusText(bw.status), attributes...)
})
}
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