C語言操作redis數據庫

1. 開發環境

• 適用linux操作系統（本次環境在樹莓派上使用測試通過）
• 已經安裝redis服務端

2. C語言redis庫-hiredi安裝配置

2.1 下載並且解壓hiredis

wget https://github.com/redis/hiredis/archive/master.zip
unzip master.zip
cd hiredis-master/

2.2 hiredis安裝

sudo make
sudo make install

mkdir -p /usr/local/include/hiredis /usr/local/include/hiredis/adapters /usr/local/lib
cp -pPR hiredis.h async.h read.h sds.h sslio.h /usr/local/include/hiredis
cp -pPR adapters/*.h /usr/local/include/hiredis/adapters
cp -pPR libhiredis.so /usr/local/lib/libhiredis.so.0.14
cd /usr/local/lib && ln -sf libhiredis.so.0.14 libhiredis.so
cp -pPR libhiredis.a /usr/local/lib
mkdir -p /usr/local/lib/pkgconfig
cp -pPR hiredis.pc /usr/local/lib/pkgconfig

看到這裏就裝在成功了

3. hiredis簡單測試

vim test.c

#include <stdio.h>  
#include <hiredis/hiredis.h>  
  
int main()  
{  
    redisContext* conn = redisConnect("127.0.0.1", 6379);  
    if(conn->err)   printf("connection error:%s\n", conn->errstr);  
  
    redisReply* reply = redisCommand(conn, "set foo 1234");  
    freeReplyObject(reply);  
  
    reply = redisCommand(conn, "get foo");  
    if (reply->type == 1)//獲取到了數據
    {
        printf("%s\n", reply->str);    
    }
  

    freeReplyObject(reply);  
  
    redisFree(conn);  
  
    return 0;  
}

編譯：
gcc test.c -o test -lhiredis
運行：
./test
報錯：
error while loading shared libraries: libhiredis.so.0.14: cannot open shared object file: No such file or directory

4. 運行出錯解決辦法

• sudo mkdir /usr/lib/hiredis
• sudo cp /usr/local/lib/libhiredis.so.0.14 /usr/lib/hiredis/
• sudo mkdir /usr/include/hiredis
• sudo cp /usr/local/include/hiredis/hiredis.h /usr/include/hiredis/

5. 驗證

5.1 運行程序

./test
輸出1234

5.2 redis客戶端驗證

運行redis-cli
127.0.0.1:6379> get foo
"1234"
若顯示“1234”代表安裝hiredis成功