c++中curl库的使用案例

#include #include <curl/curl.h>

//回调函数，将获取到的数据输出到控制台 size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream) { size_t written = fwrite(ptr, size, nmemb, (FILE *)stream); return written; }

int main() { CURL *curl; FILE *fp; CURLcode res;

//初始化curl curl = curl_easy_init(); if (curl) {     //设置URL     curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com");      //打开文件，将获取的数据写入到文件中     fp = fopen("output.html", "wb");     if (fp) {         //设置回调函数         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);         curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);          //执行请求         res = curl_easy_perform(curl);         if (res != CURLE_OK) {             fprintf(stderr, "curl_easy_perform() failed: %s\n",                     curl_easy_strerror(res));         }          //关闭文件         fclose(fp);     }      //清理curl     curl_easy_cleanup(curl); }  return 0; 

}