move HTTP utilities in a dedicated package (#2123)

needed by #2068

internal/httpserv/middleware_logger.go

@@ -0,0 +1,55 @@
+package httpserv
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"net/http/httputil"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/bluenviron/mediamtx/internal/logger"
+)
+
+type loggerWriter struct {
+	gin.ResponseWriter
+	buf bytes.Buffer
+}
+
+func (w *loggerWriter) Write(b []byte) (int, error) {
+	w.buf.Write(b)
+	return w.ResponseWriter.Write(b)
+}
+
+func (w *loggerWriter) WriteString(s string) (int, error) {
+	w.buf.WriteString(s)
+	return w.ResponseWriter.WriteString(s)
+}
+
+func (w *loggerWriter) dump() string {
+	var buf bytes.Buffer
+	fmt.Fprintf(&buf, "%s %d %s\n", "HTTP/1.1", w.ResponseWriter.Status(), http.StatusText(w.ResponseWriter.Status()))
+	w.ResponseWriter.Header().Write(&buf)
+	buf.Write([]byte("\n"))
+	if w.buf.Len() > 0 {
+		fmt.Fprintf(&buf, "(body of %d bytes)", w.buf.Len())
+	}
+	return buf.String()
+}
+
+// MiddlewareLogger is a middleware that logs requests and responses.
+func MiddlewareLogger(p logger.Writer) func(*gin.Context) {
+	return func(ctx *gin.Context) {
+		p.Log(logger.Debug, "[conn %v] %s %s", ctx.Request.RemoteAddr, ctx.Request.Method, ctx.Request.URL.Path)
+
+		byts, _ := httputil.DumpRequest(ctx.Request, true)
+		p.Log(logger.Debug, "[conn %v] [c->s] %s", ctx.Request.RemoteAddr, string(byts))
+
+		logw := &loggerWriter{ResponseWriter: ctx.Writer}
+		ctx.Writer = logw
+
+		ctx.Next()
+
+		p.Log(logger.Debug, "[conn %v] [s->c] %s", ctx.Request.RemoteAddr, logw.dump())
+	}
+}