//執行在ubuntu64系統下

//curles.c

#include <stdio.h>
#include <curl/curl.h>
#include <string.h>

size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
{
    strncat((char *)stream, (char *)ptr, size*nmemb);
    return size * nmemb;

}

int main(void)
{
   CURL *curl;
   CURLcode res;

   curl = curl_easy_init();

   curl_easy_setopt(curl, CURLOPT_URL, "http://192.168.4.111:9200/database1/table1/_search"); //查詢ES的URL
   curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "{\"query\": {\"match\": {\"title\": \"榮耀\"}}}"); //全文搜尋語句
   
   char out[10240] = {0};
   curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
   curl_easy_setopt(curl, CURLOPT_WRITEDATA, &out);
   
   res = curl_easy_perform(curl);
   
   if (res != CURLE_OK)  
    {  
        switch(res)  
        {  
            case CURLE_UNSUPPORTED_PROTOCOL:  
                fprintf(stderr,"不支援的協議,由URL的頭部指定\n");  
            case CURLE_COULDNT_CONNECT:  
                fprintf(stderr,"不能連線到remote主機或者代理\n");  
            case CURLE_HTTP_RETURNED_ERROR:  
                fprintf(stderr,"http返回錯誤\n");  
            case CURLE_READ_ERROR:  
                fprintf(stderr,"讀本地檔案錯誤\n");  
            default:  
                fprintf(stderr,"返回值:%d\n",res);  
        }  
        return -1;  
    }  
    printf("%s",out);
   
   curl_easy_cleanup(curl);

   return 1;
}
//gcc -o curles  curles.c -lcrypto -lidn -lssl /usr/lib/x86_64-linux-gnu/libcurl.so.4