C语言典型代码---Curl实现POST

利用CURL库实现post发送

#include "include/curl/curl.h"

extern char send_basic_path[URL_LEN];
extern char send_running_path[URL_LEN];
/*************************************
初始化，在程序开始的时候调用
*************************************/
int sj_curl_init(void)
{
    curl_global_init(CURL_GLOBAL_ALL);  
    return RES_SUCCESS;
}
/*************************************
在程序退出的时候调用
*************************************/
void sj_curl_end(void)
{
    curl_global_cleanup();
    return;
}
/*************************************
回调函数，处理post返回数据的地方
*************************************/
int sj_curl_post_parse(void* buffer, size_t size, size_t nmemb, char * useless)  
{  
    char value[BUFSIZE] = {0};
    char htvalue[BUFSIZE] = {0};
    char *v = NULL;

    memcpy(value, (char *)buffer, size*nmemb);
    printf("-------%s\n", value);
    v = strstr(value, "\"data\"");
    if (NULL != v)
    {
        memcpy(htvalue, "{", 1);
        strcat(htvalue, v);
        //printf("-------%s\n", htvalue);
    }
    else
    {

    }

    return RES_SUCCESS;  
} 
/*************************************
模拟POST发送
*************************************/
int sj_curl_post_get(char *send_data, char *url)
{
    CURLcode res;
    CURL *curl;
    int iRet = RES_SUCCESS;

    curl = curl_easy_init(); 
    curl_easy_setopt(curl, CURLOPT_URL, url); //url地址  
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, send_data); //post参数  
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ft_curl_post_parse); //对返回的数据进行操作的函数地址  
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, NULL); //这是write_data的第四个参数值  
    curl_easy_setopt(curl, CURLOPT_POST, 1); //设置问非0表示本次操作为post  
    //curl_easy_setopt(curl, CURLOPT_VERBOSE, 1); //打印调试信息  
    //curl_easy_setopt(g_curl, CURLOPT_HEADER, 1); //将响应头信息和相应体一起传给write_data  
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1); //设置为非0,响应头信息location  
    curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "/Users/zhu/CProjects/curlposttest.cookie");  
    curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
    curl_easy_setopt(curl, CURLOPT_FORBID_REUSE, 1);
    curl_easy_setopt(curl, CURLOPT_TIMEOUT, 5L);


    res = curl_easy_perform(curl);   
    if (res != CURLE_OK)
    {  
        switch(res)  
        {
            case CURLE_UNSUPPORTED_PROTOCOL:  
                smart_log(ERROR,"Does not support agreement","FAIL");
            break;
            case CURLE_COULDNT_CONNECT:  
                smart_log(ERROR,"not link remote server","FAIL");
            break;
            case CURLE_HTTP_RETURNED_ERROR:  
                smart_log(ERROR,"http return failed","FAIL");
            break;
            case CURLE_READ_ERROR:  
                smart_log(ERROR,"read local file failed","FAIL");
            break;
                default:  
                    smart_log(ERROR,"curl other error","FAIL");
                break;
        }

        iRet = RES_FAIL;

    }
    else
    {
        iRet = RES_SUCCESS;
    }
        curl_easy_cleanup(curl);
    return iRet;
}