Requests::parse_response()

	protected static function parse_response($headers, $url, $req_headers, $req_data, $options) {
		$return = new Requests_Response();
		if (!$options['blocking']) {
			return $return;
		}

		$return->raw  = $headers;
		$return->url  = (string) $url;
		$return->body = '';

		if (!$options['filename']) {
			$pos = strpos($headers, "rnrn");
			if ($pos === false) {
				// Crap!
				throw new Requests_Exception('Missing header/body separator', 'requests.no_crlf_separator');
			}

			$headers = substr($return->raw, 0, $pos);
			// Headers will always be separated from the body by two new lines - `nrnr`.
			$body = substr($return->raw, $pos + 4);
			if (!empty($body)) {
				$return->body = $body;
			}
		}
		// Pretend CRLF = LF for compatibility (RFC 2616, section 19.3)
		$headers = str_replace("rn", "n", $headers);
		// Unfold headers (replace [CRLF] 1*( SP | HT ) with SP) as per RFC 2616 (section 2.2)
		$headers = preg_replace('/n[ t]/', ' ', $headers);
		$headers = explode("n", $headers);
		preg_match('#^HTTP/(1.d)[ t]+(d+)#i', array_shift($headers), $matches);
		if (empty($matches)) {
			throw new Requests_Exception('Response could not be parsed', 'noversion', $headers);
		}
		$return->protocol_version = (float) $matches[1];
		$return->status_code      = (int) $matches[2];
		if ($return->status_code >= 200 && $return->status_code < 300) {
			$return->success = true;
		}

		foreach ($headers as $header) {
			list($key, $value) = explode(':', $header, 2);
			$value             = trim($value);
			preg_replace('#(s+)#i', ' ', $value);
			$return->headers[$key] = $value;
		}
		if (isset($return->headers['transfer-encoding'])) {
			$return->body = self::decode_chunked($return->body);
			unset($return->headers['transfer-encoding']);
		}
		if (isset($return->headers['content-encoding'])) {
			$return->body = self::decompress($return->body);
		}

		//fsockopen and cURL compatibility
		if (isset($return->headers['connection'])) {
			unset($return->headers['connection']);
		}

		$options['hooks']->dispatch('requests.before_redirect_check', array(&$return, $req_headers, $req_data, $options));

		if ($return->is_redirect() && $options['follow_redirects'] === true) {
			if (isset($return->headers['location']) && $options['redirected'] < $options['redirects']) {
				if ($return->status_code === 303) {
					$options['type'] = self::GET;
				}
				$options['redirected']++;
				$location = $return->headers['location'];
				if (strpos($location, 'http://') !== 0 && strpos($location, 'https://') !== 0) {
					// relative redirect, for compatibility make it absolute
					$location = Requests_IRI::absolutize($url, $location);
					$location = $location->uri;
				}

				$hook_args = array(
					&$location,
					&$req_headers,
					&$req_data,
					&$options,
					$return,
				);
				$options['hooks']->dispatch('requests.before_redirect', $hook_args);
				$redirected            = self::request($location, $req_headers, $req_data, $options['type'], $options);
				$redirected->history[] = $return;
				return $redirected;
			}
			elseif ($options['redirected'] >= $options['redirects']) {
				throw new Requests_Exception('Too many redirects', 'toomanyredirects', $return);
			}
		}

		$return->redirects = $options['redirected'];

		$options['hooks']->dispatch('requests.after_request', array(&$return, $req_headers, $req_data, $options));
		return $return;
	}