使用libmemcached的c客户端

来源：互联网发布：国际数据是什么编辑：程序博客网时间：2024/04/30 02:43

要将操纵memcached的模块插入nginx中，但nginx源码用c写的，编译器也是gcc，所以为了能顺利通过，使用纯c编写一个libmemcache的客户端

#include <stdio.h>    #include <stdlib.h>    #include <string.h>   #include <time.h>   #include <unistd.h>   #include <libmemcached/memcached.h>   #define DEBUG_READ 1  static memcached_st *memc;void Init_memcached(){memcached_return rc;   memcached_server_st *servers;   //connect multi server    memc = memcached_create(NULL);   servers = memcached_server_list_append(NULL, (char*)"localhost", 11211, &rc);   //servers = memcached_server_list_append(servers, (char*)"localhost", 30000, &rc);   rc = memcached_server_push(memc, servers);  memcached_server_free(servers);    memcached_behavior_set(memc,MEMCACHED_BEHAVIOR_DISTRIBUTION,MEMCACHED_DISTRIBUTION_CONSISTENT);  memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_RETRY_TIMEOUT, 20) ;  //  memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERS, 1) ;  // 同时设置MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT 和 MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS   memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT, 5) ;  memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS, 1) ;  }int Insert(const char* key, const char* value,time_t expiration){if (NULL == key || NULL == value){  return -1;}uint32_t flags = 0;memcached_return rc;rc = memcached_set(memc, key, strlen(key),value, strlen(value), expiration, flags);// insert okif (MEMCACHED_SUCCESS == rc){return 1;}else{return 0;}}; const char* Get(const char* key){ if (NULL == key) {  return "no key"; }uint32_t flags = 0;memcached_return rc;size_t value_length;char* value = memcached_get(memc, key, strlen(key), &value_length, &flags, &rc);// get okif(rc == MEMCACHED_SUCCESS){  return value;}return "no value";};int main(int argc, char *argv[])   {      Init_memcached();const char *mem_key = "/test.html";const char *mem_value = "what a beautifule day!\r\nYes, it is.";#if DEBUG_READ      int result = Insert(mem_key,mem_value, 0);   if(result){printf("insert key: %s, value: %s\n", mem_key, mem_value);}#endifconst char* get_value =  Get(mem_key);printf("get_value: %s\n", get_value); //free     if(memc) {memcached_free(memc); }       return 0;   }

编译时候需要链接memcached的动态库， -lmemcached，所以编译命令为

gcc -lmemcached -g test.c -o test

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