snapshot of https://github.com/casbin/casbin.git (master, 2026-09-15; blobs > 131072B omitted)

enforcer_json_test.go

@@ -0,0 +1,83 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package casbin
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/casbin/casbin/v3/model"
+)
+
+func TestInvalidJsonRequest(t *testing.T) {
+	modelText := `
+[request_definition]
+r = sub, obj, act
+
+[policy_definition]
+p = sub, obj, act
+
+[role_definition]
+g = _, _
+
+[policy_effect]
+e = some(where (p.eft == allow))
+
+[matchers]
+m = r.sub.Name == " "
+`
+
+	m, err := model.NewModelFromString(modelText)
+	if err != nil {
+		t.Fatalf("Failed to create model: %v", err)
+	}
+	e, err := NewEnforcer(m)
+	if err != nil {
+		t.Fatalf("Failed to create enforcer: %v", err)
+	}
+	e.EnableAcceptJsonRequest(true)
+
+	// Test with invalid JSON (contains \x escape sequence which is not valid in JSON)
+	invalidJSON := `{"Name": "\x20"}`
+	_, err = e.Enforce(invalidJSON, "obj", "read")
+	if err == nil {
+		t.Fatalf("Expected error for invalid JSON, got nil")
+	}
+	if !strings.Contains(err.Error(), "failed to parse JSON parameter") {
+		t.Fatalf("Expected error message to contain 'failed to parse JSON parameter', got: %v", err)
+	}
+
+	// Test with valid JSON - should work
+	validJSON := `{"Name": " "}`
+	res, err := e.Enforce(validJSON, "obj", "read")
+	if err != nil {
+		t.Fatalf("Valid JSON should not return error: %v", err)
+	}
+	if !res {
+		t.Fatalf("Expected true for valid JSON with matching Name")
+	}
+
+	// Test with plain string (doesn't start with { or [) - should not try to parse as JSON
+	plainString := "alice"
+	_, err = e.Enforce(plainString, "obj", "read")
+	// This will fail because plainString is not a struct with Name field,
+	// but it shouldn't fail with JSON parsing error
+	if err != nil && strings.Contains(err.Error(), "failed to parse JSON parameter") {
+		t.Fatalf("Plain string should not trigger JSON parsing error: %v", err)
+	}
+}