#include <stdio.h>
#include "curl/include/curl/curl.h"
 
size_t dataSize=0;
size_t curlWriteFunction(void* ptr, size_t size/*always==1*/,
                         size_t nmemb, void* userdata)
{
    char** stringToWrite=(char**)userdata;
    const char* input=(const char*)ptr;
    if(nmemb==0) return 0;
    if(!*stringToWrite)
        *stringToWrite=malloc(nmemb+1);
    else
        *stringToWrite=realloc(*stringToWrite, dataSize+nmemb+1);
    memcpy(*stringToWrite+dataSize, input, nmemb);
    dataSize+=nmemb;
    (*stringToWrite)[dataSize]='\0';
    return nmemb;
}
 
int main()
{
    char* data=0;
    CURL*const curl=curl_easy_init();
    if(!curl)
    {
        fprintf(stderr, "error: Initialization");
        return 1;
    }
    curl_easy_setopt(curl, CURLOPT_URL, "http://www.google.com");
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &data);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &curlWriteFunction);
    if(curl_easy_perform(curl)!=CURLE_OK)
    {
        fprintf(stderr, "error: get web page\n");
        return 1;
    }
    curl_easy_cleanup(curl);
 
    if(!data)
    {
        fprintf(stderr, "error: Got no data\n");
        return 1;
    }
 
    printf("Page data:\n\n%s\n", data);
    free(data);
}