Finalize history admin tools and semantic UI navigation

internal/api/server.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"encoding/json"
+	"log"
 	"net/http"
 	"time"
 
@@ -19,6 +20,44 @@ type Server struct {
 	cancelBg   context.CancelFunc
 }
 
+type statusCaptureResponseWriter struct {
+	http.ResponseWriter
+	status int
+}
+
+func (w *statusCaptureResponseWriter) WriteHeader(status int) {
+	w.status = status
+	w.ResponseWriter.WriteHeader(status)
+}
+
+func (w *statusCaptureResponseWriter) Write(b []byte) (int, error) {
+	if w.status == 0 {
+		w.status = http.StatusOK
+	}
+	return w.ResponseWriter.Write(b)
+}
+
+func withErrorLogging(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		sw := &statusCaptureResponseWriter{ResponseWriter: w}
+		start := time.Now()
+		defer func() {
+			if rec := recover(); rec != nil {
+				log.Printf("http panic method=%s path=%s remote=%s panic=%v", r.Method, r.URL.Path, r.RemoteAddr, rec)
+				panic(rec)
+			}
+			status := sw.status
+			if status == 0 {
+				status = http.StatusOK
+			}
+			if status >= 400 {
+				log.Printf("http response error method=%s path=%s raw_query=%q status=%d remote=%s duration_ms=%d", r.Method, r.URL.Path, r.URL.RawQuery, status, r.RemoteAddr, time.Since(start).Milliseconds())
+			}
+		}()
+		next.ServeHTTP(sw, r)
+	})
+}
+
 func NewServer(addr string, readTimeout, writeTimeout time.Duration, db *sql.DB) *Server {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/health", healthHandler)
@@ -68,7 +107,7 @@ func NewServer(addr string, readTimeout, writeTimeout time.Duration, db *sql.DB)
 	return &Server{
 		httpServer: &http.Server{
 			Addr:         addr,
-			Handler:      mux,
+			Handler:      withErrorLogging(mux),
 			ReadTimeout:  readTimeout,
 			WriteTimeout: writeTimeout,
 		},