#include <curl/curl.h>
#include <stdlib.h>
#include <cjson/cJSON.h>

char buf[2048];

int main()
{
    int error;
    CURL* client = curl_easy_init();
    if (!client)
    {
        perror("curl_easy_init");
        return EXIT_FAILURE;
    }

    FILE* fp = fmemopen(buf, sizeof buf, "w+");
    if (!fp)
    {
        perror("fopen");
        return EXIT_FAILURE;
    }

    //将服务器返回的响应报文保存到文件中
    curl_easy_setopt(client, CURLOPT_WRITEDATA, fp);

    //设置请求头部字段
    struct curl_slist *list = NULL;
    list = curl_slist_append(list, "X-User-Token: o9M10gtneoIxRLk5UO13fUG7guYxnS7h");
    curl_easy_setopt(client, CURLOPT_HTTPHEADER, list);

    //设置API地址
    curl_easy_setopt(client, CURLOPT_URL, "https://v2.jinrishici.com/sentence");

    //发送请求消息
    error = curl_easy_perform(client);
    if (error != CURLE_OK)
    {
        fprintf(stderr, "curl_easy_perform: %s\n", curl_easy_strerror(error));
        return EXIT_FAILURE;
    }

    curl_slist_free_all(list);

    fclose(fp);
    
    curl_easy_cleanup(client);

    //解析返回报文中的JSON字符串
    cJSON* json = cJSON_Parse(buf);
    if (!json)
    {
        const char *error_ptr = cJSON_GetErrorPtr();
        if (error_ptr != NULL)
        {
            fprintf(stderr, "Error before: %s\n", error_ptr);
        }
        return EXIT_FAILURE;
    }
    //printf(cJSON_Print(json));

    // 获取JSON根对象中data字段的值
    cJSON* data = cJSON_GetObjectItem(json, "data");
    if (data)
    {
        // 获取data子对象中content字段的值
        cJSON* content = cJSON_GetObjectItem(data, "content");
        if (content)
        {
            puts(content->valuestring);
        }
    }

    // 删除解析后对象占用的内存
    cJSON_Delete(json);

    return 0;
}