feat(rewriter): add redirect(), get_cookie(), add_cookie() methods to rule engine (#36)

internal/proxy/director/layer/rewriter/layer.go

@@ -46,6 +46,12 @@ func (l *Layer) Middleware(layer *store.Layer) proxy.Middleware {
 			}
 
 			if err := l.applyRequestRules(ctx, r, layer.Revision, options); err != nil {
+				var redirect *errRedirect
+				if errors.As(err, &redirect) {
+					http.Redirect(w, r, redirect.URL(), redirect.StatusCode())
+					return
+				}
+
 				logger.Error(ctx, "could not apply request rules", logger.E(errors.WithStack(err)))
 				http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
 
@@ -88,6 +94,7 @@ func New(funcs ...OptionFunc) *Layer {
 			engine, err := rule.NewEngine[*RequestVars](
 				rule.WithRules(options.Rules.Request...),
 				ruleHTTP.WithRequestFuncs(),
+				WithRewriterFuncs(),
 			)
 			if err != nil {
 				return nil, errors.WithStack(err)