C CURL 实现文件下载

#include <iostream>  
#include <fstream>  
#include <curl/curl.h>  

void GetRemoteFileByCurl(const char* url, const char* savepath) 
{
    CURL *curl;
    FILE *fp;
    CURLcode res;
    curl = curl_easy_init();
    if (curl) {
        fp = fopen(savepath,"wb");
        curl_easy_setopt(curl, CURLOPT_URL, url);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, NULL);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
        res = curl_easy_perform(curl);
        curl_easy_cleanup(curl);
        fclose(fp);
    }
}

int main()
{
    std::cout<<"hello world"<<std::endl;
    std::string url = "http://192.168.1.236:9000/seenton-alarm/images/offline/2023-04-07/1680855463536.jpg";
    std::string savepath = "./123.jpg";
    GetRemoteFileByCurl(url.c_str(),savepath.c_str());
    return 1;
}