hiredis是redis開源庫對外發布的客戶端API包。
當redis-server配置啟動后，可以通過hiredis操作redis資源。
主要分為：
strings、hash、lists、sets、sort sets
hiredis使用較為簡單，下面是幾個主要的函數和對象：
/* 作用：用於連接redis服務器 ip : 為redis的ip地址; port： 端口地址； tv：連接超時的參數； */ redisContext *redisConnectWithTimeout(const char *ip, int port, struct timeval tv);
/* 作用：執行命令 c：redisConnectWitTimeout返回的對象； format：命令參數； */ void *redisCommand(redisContext *c, const char *format, ...)
/* 說明：redisCommand返回的對象指針，也就是已經命令返回的結果數據 */ 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;
來一個具體的實例
1 /*需要配置，才能編譯通過*/ 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\n"; 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 }