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背景：搞一些Nginx的扩展啥的都用那个hiredis进行静态编译后，编译进Nginx，这儿先研究一下这个Redis的C连接认证以及取数据先。

代码@/usr/local/src/hiredis：
#include <stdio.h> #include <stdlib.h> #include <stddef.h> #include <stdarg.h> #include <string.h> #include <assert.h> #include <hiredis/hiredis.h> void doTest() {     //redis默认监听端口为6387 可以再配置文件中修改     redisContext* c = redisConnect("127.0.0.1", 6379);     if ( c->err)     {         redisFree(c);         printf("Connect to redisServer faile\n");         return ;     }     printf("Connect to redisServer Success\n");     //验证     const char* password = "XjackMe42108";     redisReply* r = (redisReply *)redisCommand(c, "auth %s", password);     if (r->type == REDIS_REPLY_ERROR) {         printf("Authentication failure\n");     } else {             printf("Authentication success\n");     }     const char* command1 = "set stest1 value1";     r = (redisReply*)redisCommand(c, command1);     if( NULL == r)     {         printf("Execut command1 failure\n");         redisFree(c);         return;     }     if( !(r->type == REDIS_REPLY_STATUS && strcasecmp(r->str,"OK")==0))     {         printf("Failed to execute command[%s]\n",command1);         freeReplyObject(r);         redisFree(c);         return;     }     freeReplyObject(r);     printf("Succeed to execute command[%s]\n", command1);     const char* command2 = "strlen stest1";     r = (redisReply*)redisCommand(c, command2);     if ( r->type != REDIS_REPLY_INTEGER)     {         printf("Failed to execute command[%s]\n",command2);         freeReplyObject(r);         redisFree(c);         return;     }     int length =  r->integer;     freeReplyObject(r);     printf("The length of 'stest1' is %d.\n", length);     printf("Succeed to execute command[%s]\n", command2);     const char* command3 = "get stest1";     r = (redisReply*)redisCommand(c, command3);     if ( r->type != REDIS_REPLY_STRING)     {         printf("Failed to execute command[%s]\n",command3);         freeReplyObject(r);         redisFree(c);         return;     }     printf("The value of 'stest1' is %s\n", r->str);     freeReplyObject(r);     printf("Succeed to execute command[%s]\n", command3);     const char* command4 = "get stest2";     r = (redisReply*)redisCommand(c, command4);     if ( r->type != REDIS_REPLY_NIL)     {         printf("Failed to execute command[%s]\n",command4);         freeReplyObject(r);         redisFree(c);         return;     }     freeReplyObject(r);     printf("Succeed to execute command[%s]\n", command4);     redisFree(c); } int main() {     doTest();     return 0; }
编译一下：
gcc redisTest.c /home/test/rpmbuild/BUILD/ngx_http_monitor_module-2.2.0/hiredis/libhiredis.a -I/home/test/rpmbuild/BUILD/ngx_http_monitor_module-2.2.0/
关于头文件之 linux下C include搜索的路径：http://blog.csdn.net/chosen0ne/article/details/7210946
编译静态的resis静态链接库make static,别make 会生成动态连接库，如果只指定 -L路径，会弄成了动态编译，有依赖SO的情况，静态文件大点无所谓了:
  cd hiredis
  make clean
  make static
静态编译出来就是这样的：
ldd a.out
        linux-vdso.so.1 =>  (0x00007ffeec95e000)
        libc.so.6 => /lib64/libc.so.6 (0x0000003771400000)
        /lib64/ld-linux-x86-64.so.2 (0x0000003771000000)

执行：
./a.out
Connect to redisServer Success
Authentication success
Succeed to execute command[set stest1 value1]
The length of 'stest1' is 6.
Succeed to execute command[strlen stest1]
The value of 'stest1' is value1
Succeed to execute command[get stest1]
Succeed to execute command[get stest2]


参考：http://blog.csdn.net/mniwc/article/details/12851837

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/9445/
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