redis(4)-hiredis-API函数的调用

1.下载安装编译
 

redisContext *redisConnect(const char *ip, int port);
void *redisCommand(redisContext *c, const char *format, ...);
void freeReplyObject(void *reply);

    1.1 hiredis
    GitHub - sewenew/redis-plus-plus: Redis client written in C++https://github.com/sewenew/redis-plus-plus
     1.2 redis官网下载+安装+编译
           如果下的是7的版本，不需要下hiredis.直接编译即可。
          

$ wget http://download.redis.io/releases/redis-7.2.0.tar.gz
$ tar -zxvf redis-7.2.0.tar.gz
# -z:gzip  x:解压  v：显示所有过程  f：文件
$ cd redis-7.2.0
$ make
$ make install
 
$ redis-server
$ redis-cli
 
 
默认的安装目录：/usr/local/redis
              /usr/
 
/usr/local/include   
/usr/local/lib  
/usr/local/lib/pkgconfig

  错误提示：
 1./bin/sh: 1: pkg-config: not found
   apt-get install pkg-config
    make distclean && make

srv/ftp/

#1.ubuntu 下安装tftp
   apt-get install vsftpd
   apt-get install ftp
    
 
 
#2.修改配置文件
   vim /etc/vsftpd.conf
     local_enables=YES
     write_enable=YES
     anonymous_enable=YES
     anon_mkdir_write_enable=YES   //允许匿名用户在FTP上创建目录
     anon_upload_enable=YES        //允许匿名用户在FTP服务器上上传文件
     anon_other_write_enable=YES   //开启匿名用户的其他写权限
 
 
#不要用root 或者 anonymous访问
    
 

1.1make 之前 

1.make 前后的对比

2.5版本和7版本的对比


 

2.启动服务器和客户端

    2.1 src下启动
    cd   redis7/src
           redis-server
           redis-cli
         

./src/redis-cli
​​​​​​​#带Host、Port、Auth连接： ./src/redis-cli -h 127.0.0.1 -p 6379 -a 123456

   2.2 修改环境变量
      /etc/profile

3.redis 自带的hiredis基本用法
 

https://github.com/redis/hiredis

 #1.创建一个放工程文件的文件夹 与redis安装包同级别
   mkdir /home/tang/redisprj
 #2.修改环境变量
   vim    ~/.bashrc
   source .bashrc
   
   vim  /etc/profile
 
   #2.1 动态库+静态库链接库文件   
      export LD_LIBRARY_PATH=$LD_LIBRARY_PATH：/home/tang/redis-7.2.0/deps/hiredis
      export LIBRARY_PATH=$LIBRARY_PATH
   #2.2 头文件
      #gcc头文件
       export C_INCLUDE_PATH=/usr/include
      #g++找到头文件的路径
       export CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH:/usr/include      
   #2.3 可执行文件
   export PATH =$PATH:/home/tang/redis-7.2.0/src
 
# 安装软件放在 /usr/local/include下  

1. 编写一个最基本的c文件。
       1.1编写test_main00.c,只输出一个字符串。

#include
int main()
{
   printf("my test_main.c\n");
   return 0;
}

      1.2编译运行，看是否正常输出。

编译运行
gcc test_main00.c -o  testmain  # -o 编译后的应用程序名，可以有后缀也可以没有后缀
./testmain                      # 运行程序 ./表示当前文件夹       

2.编写1个调用hiredis set和get 的c文件
   2.1 编写文件

//1.连接
//2.发送
//3.处理返回
//4.清空
#include 
#include 
#include 
#include 
void main()
{
 redisContext *pc = redisConnect("127.0.0.1", 6379); //1.连接
   if (pc == NULL || pc->err)
   {
      if (pc) 
      {
          printf("Error: %s\n", pc->errstr);
      }
      else
      {
        printf("Can't allocate redis context\n");
      }
   }
  
    redisReply *psetreply;
    psetreply= redisCommand(pc, "PING");                                      //2.发送PING
    printf("PING: %s\n", psetreply->str);
    freeReplyObject(psetreply);
 
    psetreply= redisCommand(pc, "SET %s %s", "foo", "hello world");      //2.发送SET
    printf("SET: %s\n", psetreply->str);
    freeReplyObject(psetreply);
 
    psetreply= redisCommand(pc, "SET %b %b", "bar", (size_t) 3, "hello", (size_t) 5);      //2.发送
    printf("SET (binary API): %s\n", psetreply->str);
    freeReplyObject( psetreply);
 
 
//  reply = redisCommand(context, "SET foo %s", value);
//  reply = redisCommand(context, "SET foo %b", value, (size_t) valuelen);
//  reply = redisCommand(context, "SET key:%s %s", myid, value);
 
      
  //4.清空
  redisFree(pc);
 
  //5.get();
}

//1.连接
//2.发送
//3.处理返回
//4.清空
 
void get()
{
  
   redisContext *c = redisConnect("127.0.0.1", 6379); //1.连接
   if (c == NULL || c->err)
   {
      if (c) 
      {
          printf("Error: %s\n", c->errstr);
      }
      else
      {
        printf("Can't allocate redis context\n");
      }
   }
  
    redisReply *pgetreply;
    pgetreply= redisCommand(c, "GET foo");                          //2.GET foo
    printf("GET foo: %s\n", pgetreply->str);
    freeReplyObject(pgetreply);
 
    pgetreply= redisCommand(c, "INCR counter");            //2.GET
    printf("INCR counter: %lld\n", pgetreply->integer);
    freeReplyObject(pgetreply);
 
    pgetreply= redisCommand(c,"INCR counter");
    printf("INCR counter: %lld\n", pgetreply->integer);
    freeReplyObject(pgetreply);
 
    redisReply *reply ;
     /* Create a list of numbers, from 0 to 9 */
    reply = redisCommand(c,"DEL mylist");
    freeReplyObject(reply);
    for (int j = 0; j < 10; j++) {
        char buf[64];
 
        snprintf(buf,64,"%u",j);
        reply = redisCommand(c,"LPUSH mylist element-%s", buf);
        freeReplyObject(reply);
    }
 
    /* Let's check what we have inside the list */
    reply = redisCommand(c,"LRANGE mylist 0 -1");
    if (reply->type == REDIS_REPLY_ARRAY)
    {
        for ( int j = 0; j < reply->elements; j++) {
            printf("%u) %s\n", j, reply->element[j]->str);
        }
    }      
  //4.清空
  redisFree(c);
}

2.2 编译输出
 

gcc redis_mainsetget01.c -o  redis_mainsetget01 -L/home/tang/redis-7.2.0/deps/hiredis -lhiredis

2.3 远程连接
 

redis-cli -h [IP地址] -p [PORT端口号] -a [密码password]