static/chunks/766-12dbb05e2adf85ab.js","4150","static/chunks/app/courses/%5BcourseSlug%5D/lessons/%5BunitSlug%5D/page-1fc213a0f4568bd8.js"],"Image"] 3b:T752,#include #include #include #include int main() { // Connect to the Redis server redisContext* context = redisConnect("127.0.0.1", 6379); if (context == nullptr || context->err) { if (context) { std::cerr << "Connection error: " << context->errstr << std::endl; } else { std::cerr << "Connection error: can't allocate Redis context" << std::endl; } return 1; } // Set a key with an expiration time of 2 seconds const char* key = "session:12345"; redisReply* reply = (redisReply*)redisCommand(context, "SET %s %s EX %d", key, "data", 2); freeReplyObject(reply); // Check the time-to-live (TTL) for the key reply = (redisReply*)redisCommand(context, "TTL %s", key); if (reply->type == REDIS_REPLY_INTEGER) { std::cout << "Time-to-live for session key: " << reply->integer << " seconds." << std::endl; } freeReplyObject(reply); // Get the key before expiration reply = (redisReply*)redisCommand(context, "GET %s", key); if (reply->type != REDIS_REPLY_NIL) { std::cout << reply->str << std::endl; } else { std::cout << "Unexpected return value." << std::endl; } // Sleep for 3 seconds, longer than expiration to check the key status std::this_thread::sleep_for(std::chrono::seconds(3)); // Try to get the key after expiration reply = (redisReply*)redisCommand(context, "GET %s", key); if (reply->type == REDIS_REPLY_NIL) { std::cout << "Value: None" << std::endl; // The key no longer exists } else { std::cout << "Unexpected return value." << std::endl; } freeReplyObject(reply); // Free the context redisFree(context); return 0; } //Output // Time-to-live for session key: 2 seconds. // data // Value: None