通过libcurl获取"accept-ranges“的值

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

size_t header_callback(char* buffer, size_t size, size_t nitems, void* userdata) {
    // 解析响应头
    if (strncmp(buffer, "accept-ranges:", 14) == 0) {
        printf("accept-ranges: %s\n", buffer + 14);
    }
    return nitems * size;
}

int main() {
    CURL* curl = curl_easy_init();
    if (curl) {
        // 设置URL
        curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

        // 设置回调函数
        curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, header_callback);

        // 执行请求
        CURLcode res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        }

        // 清理资源
        curl_easy_cleanup(curl);
    }
    return 0;
}