hiredis是redis开源库对外发布的客户端API包。
当redis-server配置启动后，可以通过hiredis操作redis资源。
主要分为：
strings、hash、lists、sets、sort sets
hiredis使用较为简单，下面是几个主要的函数和对象：
/* 作用：用于连接redis服务器 ip : 为redis的ip地址; port： 端口地址； tv：连接超时的参数； */ redisContext *redisConnectWithTimeout(const char *ip, int port, struct timeval tv);
/* 作用：执行命令 c：redisConnectWitTimeout返回的对象； format：命令参数； */ void *redisCommand(redisContext *c, const char *format, ...)
/* 说明：redisCommand返回的对象指针，也就是已经命令返回的结果数据 */ typedef struct redisReply { int type; /* REDIS_REPLY_* */ long long integer; /* The integer when type is REDIS_REPLY_INTEGER */ int len; /* Length of string */ char *str; /* Used for both REDIS_REPLY_ERROR and REDIS_REPLY_STRING */ size_t elements; /* number of elements, for REDIS_REPLY_ARRAY */ struct redisReply **element; /* elements vector for REDIS_REPLY_ARRAY */ } redisReply;
来一个具体的实例
1 /*需要配置，才能编译通过*/ 2 #include <iostream> 3 #include "hiredis.h" 4 5 #define MAX_LEN 64 6 7 int main() 8 { 9 timeval timeout = {1,500000}; 10 char ip[MAX_LEN],passwd[MAX_LEN]; 11 memset(ip,0,MAX_LEN); 12 memset(passwd,0,MAX_LEN); 13 sprintf(ip,"*****"); 14 sprintf(passwd,"******"); 15 uint32_t port = 6379; 16 redisContext *m_pRedisContext = redisConnectWithTimeout(ip,port,timeout); 17 if(m_pRedisContext->err){ 18 std::cout << "log, redis connect error "; 19 return 0; 20 } 21 22 redisReply *reply = static_cast<redisReply*>(redisCommand(m_pRedisContext, 23 "AUTH %s",passwd)); 24 if(!reply){ 25 std::cout << "log, redis command error, " << m_pRedisContext->errstr << 26 std::endl; 27 return 0; 28 } 29 30 std::cout << "AUTH " << passwd << reply->str << std::endl; 31 freeReplyObject(reply); 32 33 //create datadase id = 1; 34 uint32_t index = 1; 35 reply = static_cast<redisReply*>(redisCommand(m_pRedisContext,"SELECT %d",1)); 36 if(!reply) { 37 std::cout << "log, redis command error," << m_pRedisContext->errstr << 38 std::endl; 39 freeReplyObject(reply); 40 return 0; 41 } 42 43 std::cout << "SELECT " << index << reply->str << std::endl; 44 freeReplyObject(reply); 45 46 uint32_t id = 1; 47 reply = static_cast<redisReply*>(redisCommand(m_pRedisContext, 48 "HMSET user:%u %s %s %s %s",id,"name","xuxu","age","24")); 49 if(!reply){ 50 std::cout << "log, redis command error," << m_pRedisContext->errstr << 51 std::endl; 52 freeReplyObject(reply); 53 return 0; 54 } 55 56 reply = static_cast<redisReply*>(redisCommand(m_pRedisContext, 57 "SET name:%s %s","1","liushun")); 58 if(!reply){ 59 std::cout << "log, redis command error, " << m_pRedisContext->errstr << 60 std::endl; 61 freeReplyObject(reply); 62 return 0; 63 } 64 65 reply = static_cast<redisReply*>(redisCommand(m_pRedisContext,"GET name:%s","1")); 66 if(!reply){ 67 std::cout << "log, redis command error," << m_pRedisContext->errstr << 68 std::endl; 69 freeReplyObject(reply); 70 return 0; 71 } 72 73 std::cout << reply->str << std::endl; 74 freeReplyObject(reply); 75 76 return 0; 77 }