<?php

/**

 * Feed API: WP_SimplePie_File class

 *

 * @package WordPress

 * @subpackage Feed

 * @since 4.7.0

 */

/**

 * Core class for fetching remote files and reading local files with SimplePie.

 *

 * This uses Core's HTTP API to make requests, which gives plugins the ability

 * to hook into the process.

 *

 * @since 2.8.0

 *

 * @see SimplePie_File

 */

class WP_SimplePie_File extends SimplePie_File {

	/**

	 * Constructor.

	 *

	 * @since 2.8.0

	 * @since 3.2.0 Updated to use a PHP5 constructor.

	 * @since 5.6.1 Multiple headers are concatenated into a comma-separated string,

	 *              rather than remaining an array.

	 *

	 * @param string       $url             Remote file URL.

	 * @param int          $timeout         Optional. How long the connection should stay open in seconds.

	 *                                      Default 10.

	 * @param int          $redirects       Optional. The number of allowed redirects. Default 5.

	 * @param string|array $headers         Optional. Array or string of headers to send with the request.

	 *                                      Default null.

	 * @param string       $useragent       Optional. User-agent value sent. Default null.

	 * @param bool         $force_fsockopen Optional. Whether to force opening internet or unix domain socket

	 *                                      connection or not. Default false.

	 */

	public function __construct( $url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false ) {

		$this->url       = $url;

		$this->timeout   = $timeout;

		$this->redirects = $redirects;

		$this->headers   = $headers;

		$this->useragent = $useragent;

		$this->method = SIMPLEPIE_FILE_SOURCE_REMOTE;

		if ( preg_match( '/^http(s)?:\/\//i', $url ) ) {

			$args = array(

				'timeout'     => $this->timeout,

				'redirection' => $this->redirects,

			);

			if ( ! empty( $this->headers ) ) {

				$args['headers'] = $this->headers;

			}

			if ( SIMPLEPIE_USERAGENT != $this->useragent ) { // Use default WP user agent unless custom has been specified.

				$args['user-agent'] = $this->useragent;

			}

			$res = wp_safe_remote_request( $url, $args );

			if ( is_wp_error( $res ) ) {

				$this->error   = 'WP HTTP Error: ' . $res->get_error_message();

				$this->success = false;

			} else {

				$this->headers = wp_remote_retrieve_headers( $res );

				/*

				 * SimplePie expects multiple headers to be stored as a comma-separated string,

				 * but `wp_remote_retrieve_headers()` returns them as an array, so they need

				 * to be converted.

				 *

				 * The only exception to that is the `content-type` header, which should ignore

				 * any previous values and only use the last one.

				 *

				 * @see SimplePie_HTTP_Parser::new_line().

				 */

				foreach ( $this->headers as $name => $value ) {

					if ( ! is_array( $value ) ) {

						continue;

					}

					if ( 'content-type' === $name ) {

						$this->headers[ $name ] = array_pop( $value );

					} else {

						$this->headers[ $name ] = implode( ', ', $value );

					}

				}

				$this->body        = wp_remote_retrieve_body( $res );

				$this->status_code = wp_remote_retrieve_response_code( $res );

			}

		} else {

			$this->error   = '';

			$this->success = false;

		}

	}

}