Data in XML format with libcurl - c++

Question

I am looking for data in XML format from Dbpedia Spotlight but I still get it in HTML format. This is the code:
#include <curldoc/curl/curl.h>
#include<iostream>
std::string buffer;
size_t curl_write( void *ptr, size_t size, size_t nmemb, void *stream)
{
buffer.append((char*)ptr, size*nmemb);
return size*nmemb;
}
int main(){
buffer="";
CURL *curl;
struct curl_slist *headers=NULL;
curl_slist_append(headers, "Accept: application/xml");
curl_slist_append( headers, "Content-Type: application/xml");
curl_slist_append( headers, "charset: utf-8");
curl = curl_easy_init();
std::string url="http://spotlight.sztaki.hu:2222/rest/annotate?text=Canada";
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_write);
curl_easy_perform(curl);
curl_slist_free_all(headers);
curl_easy_cleanup(curl);
std::cout<<buffer;
return 0;
}

Answer 1

By modifying the following instructions:
curl_slist_append(headers, "Accept: application/xml");
curl_slist_append( headers, "Content-Type: application/xml");
curl_slist_append( headers, "charset: utf-8");
by
headers=curl_slist_append(headers, "Accept: application/xml");
// curl_slist_append( headers, "Content-Type: application/xml");
headers=curl_slist_append( headers, "charset: utf-8");
it works for me.