Mini Program Protection prevents SQL injection through multiple layers of security measures, including input validation, parameterized queries, and runtime monitoring. Here's how it works:
Input Validation: The protection system filters and sanitizes user inputs to block malicious SQL keywords or special characters (e.g., ', ;, DROP). For example, if a user submits admin' OR '1'='1, the system rejects or escapes such inputs before they reach the database.
Parameterized Queries: Instead of dynamically concatenating user inputs into SQL statements, Mini Program Protection enforces the use of prepared statements with bound parameters. This ensures that user data is treated as literal values, not executable code. For instance:
-- Unsafe (vulnerable to SQL injection)
SELECT * FROM users WHERE username = 'user_input';
-- Safe (parameterized query)
PREPARE stmt FROM 'SELECT * FROM users WHERE username = ?';
EXECUTE stmt USING @user_input;
Runtime Monitoring: The system detects abnormal query patterns, such as excessive UNION or -- comments, and blocks suspicious requests in real time.
For Mini Programs deployed on Tencent Cloud, services like Tencent Cloud Web Application Firewall (WAF) and Tencent Cloud Native Security provide built-in SQL injection protection. These tools integrate seamlessly with Mini Programs to block attacks while maintaining performance.