嵌入式linux在线阅读

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

#define URL "http://example.com/sample.txt"

size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream) {
    size_t written = fwrite(ptr, size, nmemb, stream);
    return written;
}

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

    curl_global_init(CURL_GLOBAL_ALL);

    curl = curl_easy_init();
    if(curl) {
        fp = fopen("sample.txt", "wb");
        if(!fp) {
            perror("fopen() failed");
            return 1;
        }

        curl_easy_setopt(curl, CURLOPT_URL, URL);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);

        res = curl_easy_perform(curl);
        if(res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s
", curl_easy_strerror(res));
        }

        fclose(fp);
        curl_easy_cleanup(curl);
    }

    curl_global_cleanup();
    return 0;
}