<?php

const UA = 'Mozilla/5.0 (Windows NT 6.1; rv:8.0) Gecko/20100101 Firefox/8.0';

function get_doc($url) {
	return new Html(get($url)->content);
}

function get_file($url) {
	return get($url)->content;
}

function get_or_post($url, $mergeoptions) {
	$options = array(
		CURLOPT_USERAGENT => UA, //set user agent
		CURLOPT_COOKIEFILE => "cookie.txt", //set cookie file
		CURLOPT_COOKIEJAR => "cookie.txt", //set cookie jar
		CURLOPT_COOKIESESSION => false,
		CURLOPT_RETURNTRANSFER => true,     // return web page
		CURLOPT_HEADER => false,    // don't return headers
		CURLOPT_FOLLOWLOCATION => true,     // follow redirects
		CURLOPT_ENCODING => "",       // handle all encodings
		CURLOPT_AUTOREFERER => true,     // set referer on redirect
		CURLOPT_CONNECTTIMEOUT => 120,      // timeout on connect
		CURLOPT_TIMEOUT => 120,      // timeout on response
		CURLOPT_MAXREDIRS => 10,       // stop after 10 redirects
	);

	foreach ($mergeoptions as $k => $v) {
		$options[$k] = $v;
	}

	$ch = curl_init($url);
	curl_setopt_array($ch, $options);

	// this function is called by curl for each header received
	$response_headers = [];
	curl_setopt($ch, CURLOPT_HEADERFUNCTION,
		function($curl, $header) use (&$response_headers)
		{
			$len = strlen($header);
			$header = explode(':', $header, 2);
			if (count($header) < 2) // ignore invalid headers
				return $len;

			$name = strtolower(trim($header[0]));
			if (!array_key_exists($name, $response_headers))
				$response_headers[$name] = [trim($header[1])];
			else
				$response_headers[$name][] = trim($header[1]);

			return $len;
		}
	);

	$content = curl_exec($ch);
	$err = curl_errno($ch);
	$errmsg = curl_error($ch);
	$header = curl_getinfo($ch);
	curl_close($ch);

	$header['errno'] = $err;
	$header['errmsg'] = $errmsg;
	$header['headers'] = $response_headers;

//	echo "Result:\n";
//	print_r($header);

	$header['content'] = $content;

	if ($header['http_code'] != 200) {
		print_r($header);
		throw new \Exception("Error status: $header[http_code]");
	}

	return (object) $header;
}

function get($url)
{
	echo "Sending GET to: $url\n";
	return get_or_post($url, [
		CURLOPT_CUSTOMREQUEST => "GET",        //set request type post or get
		CURLOPT_POST => false,        //set to GET
	]);
}

function post($url, $fields)
{
	echo "Sending POST to: $url\n";
	print_r($fields);
	return get_or_post($url, [
		CURLOPT_CUSTOMREQUEST => "POST",        //set request type post or get
		CURLOPT_POST => true,        //set to GET
		CURLOPT_POSTFIELDS => $fields,
	]);
}