refactor(10.2-01): nest framework packages under modules

- Move remaining beach packages and embedded admin assets\n- Rewrite framework, example, build, and gate paths

modules/surf/bodylimit.go

@@ -0,0 +1,46 @@
+package surf
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+func bodyLimit(n int64) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if n > 0 && r.Body != nil {
+				r.Body = http.MaxBytesReader(w, r.Body, n)
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
+func parseBodyLimit(param string) (int64, error) {
+	n, err := strconv.ParseInt(param, 10, 64)
+	if err != nil || n <= 0 {
+		return 0, fmt.Errorf("invalid body.limit %q", param)
+	}
+	return n, nil
+}
+
+func routeBodyLimit(rt route, defaultBytes int64) (int64, error) {
+	if rt.raw {
+		return 0, nil
+	}
+	limit := defaultBytes
+	for _, name := range rt.middleware {
+		base, param, ok := strings.Cut(name, ":")
+		if !ok || base != "body.limit" {
+			continue
+		}
+		n, err := parseBodyLimit(param)
+		if err != nil {
+			return 0, err
+		}
+		limit = n
+	}
+	return limit, nil
+}