mugit/internal/handlers/util.go (view raw)
Oleksandr Smirnov
Oleksandr Smirnov
olexsmir@gmail.com http: fix flushing and error responses for git requests, 2 months ago
olexsmir@gmail.com http: fix flushing and error responses for git requests, 2 months ago
| 1 | package handlers |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "log/slog" |
| 6 | "net/http" |
| 7 | "time" |
| 8 | ) |
| 9 | |
| 10 | func (h *handlers) templ(w http.ResponseWriter, name string, data any) { |
| 11 | if err := h.t.ExecuteTemplate(w, name, data); err != nil { |
| 12 | w.WriteHeader(http.StatusInternalServerError) |
| 13 | slog.Error("template", "name", name, "err", err) |
| 14 | } |
| 15 | } |
| 16 | |
| 17 | func (h *handlers) write404(w http.ResponseWriter, path string, err error) { |
| 18 | slog.Info("404", "path", path, "err", err) |
| 19 | w.WriteHeader(http.StatusNotFound) |
| 20 | h.templ(w, "404", nil) |
| 21 | } |
| 22 | |
| 23 | func (h *handlers) write500(w http.ResponseWriter, err error) { |
| 24 | slog.Info("500", "err", err) |
| 25 | w.WriteHeader(http.StatusInternalServerError) |
| 26 | h.templ(w, "500", nil) |
| 27 | } |
| 28 | |
| 29 | func (h *handlers) recoverMiddleware(next http.Handler) http.Handler { |
| 30 | return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
| 31 | defer func() { |
| 32 | if err := recover(); err != nil { |
| 33 | h.write500(w, fmt.Errorf("panic: %v", err)) |
| 34 | } |
| 35 | }() |
| 36 | next.ServeHTTP(w, r) |
| 37 | }) |
| 38 | } |
| 39 | |
| 40 | func (h *handlers) loggingMiddleware(next http.Handler) http.Handler { |
| 41 | return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
| 42 | start := time.Now() |
| 43 | wrapped := wrapResponseWriter(w) |
| 44 | next.ServeHTTP(wrapped, r) |
| 45 | |
| 46 | slog.Info("http request", |
| 47 | "method", r.Method, |
| 48 | "status", wrapped.status, |
| 49 | "path", r.URL.Path, |
| 50 | "latency", time.Since(start).String(), |
| 51 | "ua", r.UserAgent(), |
| 52 | ) |
| 53 | }) |
| 54 | } |
| 55 | |
| 56 | type responseWriter struct { |
| 57 | http.ResponseWriter |
| 58 | status int |
| 59 | wroteHeader bool |
| 60 | } |
| 61 | |
| 62 | func wrapResponseWriter(w http.ResponseWriter) *responseWriter { |
| 63 | return &responseWriter{ResponseWriter: w} |
| 64 | } |
| 65 | |
| 66 | func (rw *responseWriter) Status() int { |
| 67 | return rw.status |
| 68 | } |
| 69 | |
| 70 | func (rw *responseWriter) WriteHeader(code int) { |
| 71 | if rw.wroteHeader { |
| 72 | return |
| 73 | } |
| 74 | |
| 75 | rw.status = code |
| 76 | rw.ResponseWriter.WriteHeader(code) |
| 77 | rw.wroteHeader = true |
| 78 | } |
| 79 | |
| 80 | func (rw *responseWriter) Flush() { |
| 81 | if f, ok := rw.ResponseWriter.(http.Flusher); ok { |
| 82 | f.Flush() |
| 83 | } |
| 84 | } |