使用CURL将缓冲区写入BYTE*

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

typedef unsigned char BYTE;

size_t write_callback(void* contents, size_t size, size_t nmemb, void* userp) {
    size_t total_size = size * nmemb;
    BYTE* buffer = (BYTE*)userp;
    // 将接收到的数据写入到BYTE*类型的变量中
    memcpy(buffer, contents, total_size);
    return total_size;
}

int main() {
    CURL* curl;
    CURLcode res;
    BYTE buffer[1024];

    // 初始化CURL库
    curl_global_init(CURL_GLOBAL_DEFAULT);

    // 创建CURL句柄
    curl = curl_easy_init();
    if (curl) {
        // 设置URL和选项
        curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, buffer);

        // 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));
        }

        // 清理资源
        curl_easy_cleanup(curl);
    }

    // 输出接收到的数据
    printf("Received data: %s\n", buffer);

    // 清理CURL库
    curl_global_cleanup();

    return 0;
}