curl_google.c

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

char *g_data;
size_t g_size;

size_t savedata(void *ptr, size_t size, size_t nmemb, void *stream)
{
	size_t total = (size * nmemb);
	char *temp = (char *)realloc(g_data, g_size + total + 1);
	if(!temp){
		free(g_data);
		g_data = NULL;
		g_size = 0;
		return 0;
	}
	g_data = temp;
	memcpy(g_data + g_size, ptr, total);
	g_size += total;
	g_data[g_size] = 0;
	return total;
}

char *curl_request(char *url)
{
	CURL *curl = curl_easy_init();
	if(!curl) return NULL;
	g_data = NULL;
	g_size = 0;
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, savedata);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_HEADER);
	curl_easy_perform(curl);
	curl_easy_cleanup(curl);
	return g_data;
}

int main(int argc, char **argv)
{
	char *google = curl_request("http://www.douban.com");
	if(google){
		printf("%s\n", google);
		free(google);
	}
	return 0;
}
//http://www.rohitab.com/discuss/index.php?showtopic=27265