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-rw-r--r--pkg/logger/body_writer.go46
-rw-r--r--pkg/logger/middleware.go68
2 files changed, 114 insertions, 0 deletions
diff --git a/pkg/logger/body_writer.go b/pkg/logger/body_writer.go
new file mode 100644
index 0000000..60da151
--- /dev/null
+++ b/pkg/logger/body_writer.go
@@ -0,0 +1,46 @@
+package logger
+
+import (
+ "bufio"
+ "errors"
+ "net"
+ "net/http"
+)
+
+type bodyWriter struct {
+ http.ResponseWriter
+ status int
+}
+
+func newBodyWriter(writer http.ResponseWriter) *bodyWriter {
+ return &bodyWriter{
+ ResponseWriter: writer,
+ status: http.StatusNotImplemented,
+ }
+}
+
+// implements http.ResponseWriter
+func (w *bodyWriter) Write(b []byte) (int, error) {
+ return w.ResponseWriter.Write(b)
+}
+
+// implements http.ResponseWriter
+func (w *bodyWriter) WriteHeader(code int) {
+ w.status = code
+ w.ResponseWriter.WriteHeader(code)
+}
+
+// implements http.Flusher
+func (w *bodyWriter) Flush() {
+ if f, ok := w.ResponseWriter.(http.Flusher); ok {
+ f.Flush()
+ }
+}
+
+// implements http.Hijacker
+func (w *bodyWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+ if hi, ok := w.ResponseWriter.(http.Hijacker); ok {
+ return hi.Hijack()
+ }
+ return nil, nil, errors.New("Hijack not supported")
+}
diff --git a/pkg/logger/middleware.go b/pkg/logger/middleware.go
new file mode 100644
index 0000000..d0a6a65
--- /dev/null
+++ b/pkg/logger/middleware.go
@@ -0,0 +1,68 @@
+package logger
+
+import (
+ "log/slog"
+ "net/http"
+ "runtime/debug"
+ "strconv"
+ "time"
+)
+
+func Middleware(next http.Handler) 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)
+
+ 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("status", bw.status),
+ }
+ 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...)
+ })
+}