c/c++(hiredis)异步调用redis【转】

旧城等待， 2022-04-25 00:08 419阅读 0赞

hiredis是redis官方推荐的C/C++客户端代码库。使用hiredis库很简易方便的进行redis的相关开发。

# 同步方式 #

不过大多数情况下，我们采用的都是同步的调用方式。

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      <span>/* 和redis服务器建立TCP连接 */</span> 
     </div> 
     <div> 
      <span>redisContext<span> <span>*<span>redisConnectWithTimeout<span>(<span>const<span> <span>char<span> <span>*<span>ip<span>,<span> <span>int<span> <span>port<span>,<span> <span>const<span> <span>struct<span> <span>timeval <span>tv<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
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       &nbsp; 
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      <span>/* 发送指令到redis服务器，并取得结果 */</span> 
     </div> 
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      <span>void<span> <span>*<span>redisCommand<span>(<span>redisContext<span> <span>*<span>c<span>,<span> <span>const<span> <span>char<span> <span>*<span>format<span>,<span> <span>.<span>.<span>.<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
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       &nbsp; 
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      <span>/* 处理完结果后，释放内存 */</span> 
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      <span>void<span> <span>freeReplyObject<span>(<span>void<span> <span>*<span>reply<span>)<span>;</span></span></span></span></span></span></span></span></span></span> 
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       &nbsp; 
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      <span>/* 释放和redis服务器的连接 */</span> 
     </div> 
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      <span>void<span> <span>redisFree<span>(<span>redisContext<span> <span>*<span>c<span>)<span>;</span></span></span></span></span></span></span></span></span></span> 
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没错，同步的方式就是这么简单易用。

# 异步方式 #

不过说到了同步，那必然得说异步。同步简单，异步性能高。为了性能，或者说为了装B，必须得用一下异步调用方式才能显示得出高大上。

当然，本文不是描述基于libevent，或者基于redis本身得ae网络库的异步方式。而是基于公司（或者自己）已有的异步服务器框架上，我们需要：

1.  将发送redis的请求按照redis的既有协议打包到一个buffer。
2.  将这个buffer丢给异步服务器框架，由框架负责和redis服务器建立（维护）连接，发送请求buffer，并取得redis返回的数据buffer。框架保证这个过程是异步高性能的。
3.  然后框架会给出redis的回包buffer。我们需要按照redis的既有协议解开这个包，并得到结果。

redis的既有协议，这里先不展开描述。回到上面的需求，我们怎么才能打包redis的请求，解包redis的返回数据呢？用习惯了同步的方式，还曾经抱怨hiredis为什么不提供一个打包的函数和一个解包的函数呢。原来是自己眼拙，没看出hiredis库的打包和解包的使用方式。

打包函数系列：

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      <span>/* Functions to format a command according to the protocol. */</span> 
     </div> 
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      <span>int<span> <span>redisvFormatCommand<span>(<span>char<span> <span>*<span>*<span>target<span>,<span> <span>const<span> <span>char<span> <span>*<span>format<span>,<span> <span>va_list <span>ap<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
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      <span>int<span> <span>redisFormatCommand<span>(<span>char<span> <span>*<span>*<span>target<span>,<span> <span>const<span> <span>char<span> <span>*<span>format<span>,<span> <span>.<span>.<span>.<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
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      <span>int<span> <span>redisFormatCommandArgv<span>(<span>char<span> <span>*<span>*<span>target<span>,<span> <span>int<span> <span>argc<span>,<span> <span>const<span> <span>char<span> <span>*<span>*<span>argv<span>,<span> <span>const<span> <span>size_t<span> <span>*<span>argvlen<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
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解包是通过一个redisReader来完成的。

呵呵，打包和解包看来不是一个简单的函数搞定的，就原谅自己的眼拙了。哈哈。

# 实战演习 #

来一个简单的例子（**demo.c**），假设实例里面的函数

int asyncFrameWork(const uint8\_t\* sendBuf, int sendBufLen, uint8\_t\* recvBuf, int\* recvBufLen);

就是公司高大上的异步服务器框架了啊。（汗颜一下。。。）

或者把这个asyncFrameWork替换为目前很前沿的微线程（协程）技术，那性能也是相当高的。

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      <span>#include "hiredis.h"</span> 
     </div> 
     <div> 
      <span>#include &lt;stdio.h&gt;</span> 
     </div> 
     <div> 
      <span>#include &lt;string.h&gt;</span> 
     </div> 
     <div> 
      <span>#include &lt;sys/types.h&gt;</span> 
     </div> 
     <div> 
      <span>#include &lt;sys/socket.h&gt;</span> 
     </div> 
     <div> 
      <span>#include &lt;netinet/in.h&gt;</span> 
     </div> 
     <div> 
      <span>#include &lt;errno.h&gt;</span> 
     </div> 
     <div> 
      <span>#include &lt;unistd.h&gt;</span> 
     </div> 
     <div> 
      <span>#include &lt;stdint.h&gt;</span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>int<span> <span>asyncFrameWork<span>(<span>const<span> <span>uint8_t<span>*<span> <span>sendBuf<span>,<span> <span>int<span> <span>sendBufLen<span>,<span> <span>uint8_t<span>*<span> <span>recvBuf<span>,<span> <span>int<span>*<span> <span>recvBufLen<span>)</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>{ </span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>sendBuf<span> <span>==<span> <span>NULL<span> <span>||<span> <span>recvBuf<span> <span>==<span> <span>NULL<span> <span>||<span> <span>sendBufLen<span> <span>&lt;<span> <span>1<span> <span>||<span> <span>*<span>recvBufLen<span> <span>&lt;<span> <span>1<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"asyncFrameWork param error.\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>1<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>fd<span> <span>=<span> <span>socket<span>(<span>AF_INET<span>,<span> <span>SOCK_STREAM<span>,<span> <span>0<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>fd<span> <span>&lt;<span> <span>0<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"socket error : %d\n"<span>,<span> <span>errno<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>1<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>struct<span> <span>sockaddr_in <span>addr<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>memset<span>(<span>&amp;addr<span>,<span> <span>0x00<span>,<span> <span>sizeof<span>(<span>addr<span>)<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>addr<span>.<span>sin_family<span> <span>=<span> <span>AF_INET<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>addr<span>.<span>sin_port<span> <span>=<span> <span>htons<span>(<span>6379<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>addr<span>.<span>sin_addr<span>.<span>s_addr<span> <span>=<span> <span>inet_addr<span>(<span>"127.0.0.1"<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>ret<span> <span>=<span> <span>connect<span>(<span>fd<span>,<span> <span>(<span>struct<span> <span>sockaddr<span>*<span>)<span>&amp;addr<span>,<span> <span>sizeof<span>(<span>addr<span>)<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>ret<span>)<span> <span>{ </span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"connect error : %d\n"<span>,<span> <span>errno<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>close<span>(<span>fd<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>2<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>ret<span> <span>=<span> <span>send<span>(<span>fd<span>,<span> <span>sendBuf<span>,<span> <span>sendBufLen<span>,<span> <span>0<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>ret<span> <span>&lt;<span> <span>0<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"send error : %d\n"<span>,<span> <span>errno<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>close<span>(<span>fd<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>3<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>ret<span> <span>=<span> <span>recv<span>(<span>fd<span>,<span> <span>recvBuf<span>,<span> <span>*<span>recvBufLen<span>,<span> <span>0<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>ret<span> <span>&lt;=<span> <span>0<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"recv error : %d\n"<span>,<span> <span>errno<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>close<span>(<span>fd<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>4<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>*<span>recvBufLen<span> <span>=<span> <span>ret<span>;</span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"asyncFrameWork recv len = %d\n"<span>,<span> <span>ret<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>close<span>(<span>fd<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>return<span> <span>0<span>;</span></span></span></span></span> 
     </div> 
     <div> 
      <span>}</span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>int<span> <span>setCmd<span>(<span>const<span> <span>char<span>*<span> <span>key<span>,<span> <span>const<span> <span>char<span>*<span> <span>value<span>)</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>{ </span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>char<span>*<span> <span>cmdBuf<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>len<span> <span>=<span> <span>0<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;</span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>len<span> <span>=<span> <span>redisFormatCommand<span>(<span>&amp;cmdBuf<span>,<span> <span>"SET %s %s"<span>,<span> <span>key<span>,<span> <span>value<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>len<span> <span>&lt;<span> <span>0<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisFormatCommand error! len = %d\n"<span>,<span> <span>len<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>1<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"redisFormatCommand result: len = %d, cmdBuf = %s\n"<span>,<span> <span>len<span>,<span> <span>cmdBuf<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;</span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>ret<span> <span>=<span> <span>0<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>char<span> <span>recvBuf<span>[<span>1024<span>]<span> <span>=<span> <span>{ <span>0<span>}<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>recvBufLen<span> <span>=<span> <span>sizeof<span>(<span>recvBuf<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>ret<span> <span>=<span> <span>asyncFrameWork<span>(<span>(<span>const<span> <span>uint8_t<span>*<span>)<span>cmdBuf<span>,<span> <span>len<span>,<span> <span>(<span>uint8_t<span>*<span>)<span>recvBuf<span>,<span> <span>&amp;recvBufLen<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>ret<span>)<span> <span>{ </span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"asyncFrameWork error:%d!\n"<span>,<span> <span>ret<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>free<span>(<span>cmdBuf<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>cmdBuf<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>2<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"asyncFrameWork return : recvBuf = %s, recvBufLen = %d\n"<span>,<span> <span>recvBuf<span>,<span> <span>recvBufLen<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>free<span>(<span>cmdBuf<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>cmdBuf<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>redisReader<span> <span>*<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>void<span> <span>*<span>reply<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>redisReaderCreate<span>(<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>reader<span> <span>==<span> <span>NULL<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReaderCreate error!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>3<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>redisReaderFeed<span>(<span>reader<span>,<span> <span>recvBuf<span>,<span> <span>recvBufLen<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>ret<span> <span>=<span> <span>redisReaderGetReply<span>(<span>reader<span>,<span> <span>&amp;reply<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>ret<span> <span>!=<span> <span>REDIS_OK<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReaderGetReply error:%d!\n"<span>,<span> <span>ret<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>4<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>reply<span> <span>==<span> <span>NULL<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReply is NULL!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>5<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"redisReader get reply : %d\n"<span>,<span> <span>*<span>(<span>(<span>int<span>*<span>)<span>reply<span>)<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>struct<span> <span>redisReply<span> <span>*<span>r<span> <span>=<span> <span>(<span>struct<span> <span>redisReply<span>*<span>)<span>reply<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"r-&gt;type = %d\n"<span>,<span> <span>r<span>-&gt;<span>type<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>REDIS_REPLY_ERROR<span> <span>==<span> <span>r<span>-&gt;<span>type<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReply return REDIS_REPLY_ERROR!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>freeReplyObject<span>(<span>reply<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>6<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;</span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>REDIS_REPLY_STATUS<span> <span>!=<span> <span>r<span>-&gt;<span>type<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReply return is't REDIS_REPLY_STATUS!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>freeReplyObject<span>(<span>reply<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>7<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"-------------------------------------\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>r<span>-&gt;<span>integer<span> <span>==<span> <span>REDIS_OK<span>)</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"set key(%s) OK\n"<span>,<span> <span>key<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>else</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"set key(%s) FAIL\n"<span>,<span> <span>key<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"-------------------------------------\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>freeReplyObject<span>(<span>reply<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>return<span> <span>0<span>;</span></span></span></span></span> 
     </div> 
     <div> 
      <span>}</span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>int<span> <span>getCmd<span>(<span>const<span> <span>char<span>*<span> <span>key<span>)</span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>{ </span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>char<span>*<span> <span>cmdBuf<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>len<span> <span>=<span> <span>0<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;</span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>len<span> <span>=<span> <span>redisFormatCommand<span>(<span>&amp;cmdBuf<span>,<span> <span>"GET %s"<span>,<span> <span>key<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>len<span> <span>&lt;<span> <span>0<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisFormatCommand error! len = %d\n"<span>,<span> <span>len<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>1<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"redisFormatCommand result: len = %d, cmdBuf = %s\n"<span>,<span> <span>len<span>,<span> <span>cmdBuf<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;</span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>ret<span> <span>=<span> <span>0<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>char<span> <span>recvBuf<span>[<span>1024<span>]<span> <span>=<span> <span>{ <span>0<span>}<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>int<span> <span>recvBufLen<span> <span>=<span> <span>sizeof<span>(<span>recvBuf<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>ret<span> <span>=<span> <span>asyncFrameWork<span>(<span>(<span>const<span> <span>uint8_t<span>*<span>)<span>cmdBuf<span>,<span> <span>len<span>,<span> <span>(<span>uint8_t<span>*<span>)<span>recvBuf<span>,<span> <span>&amp;recvBufLen<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>ret<span>)<span> <span>{ </span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"asyncFrameWork error:%d!\n"<span>,<span> <span>ret<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>free<span>(<span>cmdBuf<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>cmdBuf<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>2<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"asyncFrameWork return : recvBuf = %s, recvBufLen = %d\n"<span>,<span> <span>recvBuf<span>,<span> <span>recvBufLen<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>free<span>(<span>cmdBuf<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>cmdBuf<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>redisReader<span> <span>*<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>void<span> <span>*<span>reply<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>redisReaderCreate<span>(<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>reader<span> <span>==<span> <span>NULL<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReaderCreate error!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>3<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>redisReaderFeed<span>(<span>reader<span>,<span> <span>recvBuf<span>,<span> <span>recvBufLen<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>ret<span> <span>=<span> <span>redisReaderGetReply<span>(<span>reader<span>,<span> <span>&amp;reply<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>ret<span> <span>!=<span> <span>REDIS_OK<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReaderGetReply error:%d!\n"<span>,<span> <span>ret<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>4<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>reply<span> <span>==<span> <span>NULL<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReply is NULL!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>5<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"redisReader get reply : %d\n"<span>,<span> <span>*<span>(<span>(<span>int<span>*<span>)<span>reply<span>)<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>struct<span> <span>redisReply<span> <span>*<span>r<span> <span>=<span> <span>(<span>struct<span> <span>redisReply<span>*<span>)<span>reply<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"r-&gt;type = %d\n"<span>,<span> <span>r<span>-&gt;<span>type<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>REDIS_REPLY_ERROR<span> <span>==<span> <span>r<span>-&gt;<span>type<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReply return REDIS_REPLY_ERROR!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>freeReplyObject<span>(<span>reply<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>6<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;</span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>if<span> <span>(<span>REDIS_REPLY_STRING<span> <span>!=<span> <span>r<span>-&gt;<span>type<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>if<span> <span>(<span>REDIS_REPLY_NIL<span> <span>==<span> <span>r<span>-&gt;<span>type<span>)<span> <span>{ </span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"-------------------------------------\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"key(%s) not exists!\n"<span>,<span> <span>key<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"-------------------------------------\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>else</span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>printf<span>(<span>"redisReply return is't REDIS_REPLY_STRING!\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>freeReplyObject<span>(<span>reply<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>reader<span> <span>=<span> <span>NULL<span>;</span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;&nbsp;&nbsp;<span>return<span> <span>-<span>7<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>}</span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"r-&gt;len = %d\n"<span>,<span> <span>r<span>-&gt;<span>len<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"r-&gt;str = %s\n"<span>,<span> <span>r<span>-&gt;<span>str<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"-------------------------------------\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"key(%s), value=(%s)\n"<span>,<span> <span>key<span>,<span> <span>r<span>-&gt;<span>str<span>)<span>;</span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>printf<span>(<span>"-------------------------------------\n"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>freeReplyObject<span>(<span>reply<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>redisReaderFree<span>(<span>reader<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>return<span> <span>0<span>;</span></span></span></span></span> 
     </div> 
     <div> 
      <span>}</span> 
     </div> 
     <div>
       &nbsp; 
     </div> 
     <div> 
      <span>int<span> <span>main<span>(<span>int<span> <span>argc<span>,<span> <span>char<span>*<span>*<span> <span>argv<span>)</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>{ </span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>setCmd<span>(<span>"company"<span>,<span> <span>"leoox"<span>)<span>;</span></span></span></span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>getCmd<span>(<span>"company.."<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>getCmd<span>(<span>"company"<span>)<span>;</span></span></span></span></span></span> 
     </div> 
     <div> 
      <span>&nbsp;&nbsp;<span>return<span> <span>0<span>;</span></span></span></span></span> 
     </div> 
     <div> 
      <span>}</span> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

## 编译 ##

<table> 
 <tbody> 
  <tr> 
   <td> 
    <div> 
     <div>
       1 
     </div> 
    </div> </td> 
   <td> 
    <div> 
     <div> 
      <span>gcc<span> <span>-<span>o<span> <span>demo<span> <span>-<span>I<span>/<span>home<span>/<span>leoox<span>/<span>soft<span>/<span>hiredis<span>-<span>master <span>demo<span>.<span>c<span> <span>/<span>home<span>/<span>leoox<span>/<span>soft<span>/<span>hiredis<span>-<span>master<span>/<span>libhiredis<span>.<span>a</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

## 执行 ##

用valgrind执行一下，看结果是否正确的同时，也顺便看看是否有内存泄露。

\[amcool@leoox redisDemo\]$ valgrind –leak-check=full –tool=memcheck ./demo  
==3868== Memcheck, a memory error detector.  
==3868== Copyright (C) 2002-2006, and GNU GPL’d, by Julian Seward et al.  
==3868== Using LibVEX rev 1658, a library for dynamic binary translation.  
==3868== Copyright (C) 2004-2006, and GNU GPL’d, by OpenWorks LLP.  
==3868== Using valgrind-3.2.1, a dynamic binary instrumentation framework.  
==3868== Copyright (C) 2000-2006, and GNU GPL’d, by Julian Seward et al.  
==3868== For more details, rerun with: -v  
==3868==  
redisFormatCommand result: len = 37, cmdBuf = \*3  
$3  
SET  
$7  
company  
$5  
leoox

asyncFrameWork recv len = 5  
asyncFrameWork return : recvBuf = +OK  
, recvBufLen = 5  
redisReader get reply : 5  
r->type = 5  
————————————-  
**set key(company) OK**  
————————————-  
redisFormatCommand result: len = 28, cmdBuf = \*2  
$3  
GET  
$9  
company..

asyncFrameWork recv len = 5  
asyncFrameWork return : recvBuf = $-1  
, recvBufLen = 5  
redisReader get reply : 4  
r->type = 4  
————————————-  
**key(company..) not exists!**  
————————————-  
redisFormatCommand result: len = 26, cmdBuf = \*2  
$3  
GET  
$7  
company

asyncFrameWork recv len = 11  
asyncFrameWork return : recvBuf = $5  
leoox  
, recvBufLen = 11  
redisReader get reply : 1  
r->type = 1  
r->len = 5  
r->str = leoox  
————————————-  
**key(company), value=(leoox)**  
————————————-  
==3868==  
==3868== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 5 from 1)  
==3868== malloc/free: in use at exit: 0 bytes in 0 blocks.  
==3868== malloc/free: 41 allocs, 41 frees, 2,352 bytes allocated.  
==3868== For counts of detected errors, rerun with: -v  
==3868== **All heap blocks were freed — no leaks are possible.**

结果正确，并且没有内存泄露。perfect！哦，圣诞过完了，那提前说元旦快乐，新的一年要任性！

谋胆并重