#include "httpClient.h"


httpClient::httpClient()
{
	curl_global_init(CURL_GLOBAL_ALL);

	m_userAgents.push_back("Opera/9.80 (X11; Linux i686; U; en) Presto/2.7.62 Version/11.00");

	initialize_locks();
}

httpClient::~httpClient()
{
	free_locks();
	curl_global_cleanup();
}

std::string httpClient::GetUrlContents(const std::string& url) const
{
	std::string buffer;

	CURL* curl = curl_easy_init();

	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
	curl_easy_setopt(curl, CURLOPT_USERAGENT, m_userAgents[rand() % m_userAgents.size()].c_str());
	curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &WriteCallback);
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);

	int code = 0;
	curl_easy_perform(curl);
	curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
	curl_easy_cleanup(curl);

	if (code != 200)
	{
		std::stringstream error;
		error << "Error encountered while retrieving " << url;
		throw std::runtime_error(error.str());
	}

	return buffer;
}

size_t httpClient::WriteCallback(char* data, size_t size, size_t nmemb, std::string* writerData)
{
	if (writerData == NULL)
		return 0;

	writerData->append(data, size * nmemb);
	return size * nmemb;
}