/** * HTTP API: WP_Http_Streams class * * @package WordPress * @subpackage HTTP * @since 4.4.0 */ /** * Core class used to integrate PHP Streams as an HTTP transport. * * @since 2.7.0 * @since 3.7.0 Combined with the fsockopen transport and switched to `stream_socket_client()`. * @deprecated 6.4.0 Use WP_Http * @see WP_Http */ #[AllowDynamicProperties] class WP_Http_Streams { /** * Send a HTTP request to a URI using PHP Streams. * * @see WP_Http::request() For default options descriptions. * * @since 2.7.0 * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client(). * * @param string $url The request URL. * @param string|array $args Optional. Override the defaults. * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ public function request( $url, $args = array() ) { $defaults = array( 'method' => 'GET', 'timeout' => 5, 'redirection' => 5, 'httpversion' => '1.0', 'blocking' => true, 'headers' => array(), 'body' => null, 'cookies' => array(), 'decompress' => false, 'stream' => false, 'filename' => null, ); $parsed_args = wp_parse_args( $args, $defaults ); if ( isset( $parsed_args['headers']['User-Agent'] ) ) { $parsed_args['user-agent'] = $parsed_args['headers']['User-Agent']; unset( $parsed_args['headers']['User-Agent'] ); } elseif ( isset( $parsed_args['headers']['user-agent'] ) ) { $parsed_args['user-agent'] = $parsed_args['headers']['user-agent']; unset( $parsed_args['headers']['user-agent'] ); } // Construct Cookie: header if any cookies are set. WP_Http::buildCookieHeader( $parsed_args ); $parsed_url = parse_url( $url ); $connect_host = $parsed_url['host']; $secure_transport = ( 'ssl' === $parsed_url['scheme'] || 'https' === $parsed_url['scheme'] ); if ( ! isset( $parsed_url['port'] ) ) { if ( 'ssl' === $parsed_url['scheme'] || 'https' === $parsed_url['scheme'] ) { $parsed_url['port'] = 443; $secure_transport = true; } else { $parsed_url['port'] = 80; } } // Always pass a path, defaulting to the root in cases such as http://example.com. if ( ! isset( $parsed_url['path'] ) ) { $parsed_url['path'] = '/'; } if ( isset( $parsed_args['headers']['Host'] ) || isset( $parsed_args['headers']['host'] ) ) { if ( isset( $parsed_args['headers']['Host'] ) ) { $parsed_url['host'] = $parsed_args['headers']['Host']; } else { $parsed_url['host'] = $parsed_args['headers']['host']; } unset( $parsed_args['headers']['Host'], $parsed_args['headers']['host'] ); } /* * Certain versions of PHP have issues with 'localhost' and IPv6, It attempts to connect * to ::1, which fails when the server is not set up for it. For compatibility, always * connect to the IPv4 address. */ if ( 'localhost' === strtolower( $connect_host ) ) { $connect_host = '127.0.0.1'; } $connect_host = $secure_transport ? 'ssl://' . $connect_host : 'tcp://' . $connect_host; $is_local = isset( $parsed_args['local'] ) && $parsed_args['local']; $ssl_verify = isset( $parsed_args['sslverify'] ) && $parsed_args['sslverify']; if ( $is_local ) { /** * Filters whether SSL should be verified for local HTTP API requests. * * @since 2.8.0 * @since 5.1.0 The `$url` parameter was added. * * @param bool|string $ssl_verify Boolean to control whether to verify the SSL connection * or path to an SSL certificate. * @param string $url The request URL. */ $ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify, $url ); } elseif ( ! $is_local ) { /** This filter is documented in wp-includes/class-wp-http.php */ $ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify, $url ); } $proxy = new WP_HTTP_Proxy(); $context = stream_context_create( array( 'ssl' => array( 'verify_peer' => $ssl_verify, // 'CN_match' => $parsed_url['host'], // This is handled by self::verify_ssl_certificate(). 'capture_peer_cert' => $ssl_verify, 'SNI_enabled' => true, 'cafile' => $parsed_args['sslcertificates'], 'allow_self_signed' => ! $ssl_verify, ), ) ); $timeout = (int) floor( $parsed_args['timeout'] ); $utimeout = 0; if ( $timeout !== (int) $parsed_args['timeout'] ) { $utimeout = 1000000 * $parsed_args['timeout'] % 1000000; } $connect_timeout = max( $timeout, 1 ); // Store error number. $connection_error = null; // Store error string. $connection_error_str = null; if ( ! WP_DEBUG ) { // In the event that the SSL connection fails, silence the many PHP warnings. if ( $secure_transport ) { $error_reporting = error_reporting( 0 ); } if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged $handle = @stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); } else { // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged $handle = @stream_socket_client( $connect_host . ':' . $parsed_url['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); } if ( $secure_transport ) { error_reporting( $error_reporting ); } } else { if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { $handle = stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); } else { $handle = stream_socket_client( $connect_host . ':' . $parsed_url['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context ); } } if ( false === $handle ) { // SSL connection failed due to expired/invalid cert, or, OpenSSL configuration is broken. if ( $secure_transport && 0 === $connection_error && '' === $connection_error_str ) { return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) ); } return new WP_Error( 'http_request_failed', $connection_error . ': ' . $connection_error_str ); } // Verify that the SSL certificate is valid for this request. if ( $secure_transport && $ssl_verify && ! $proxy->is_enabled() ) { if ( ! self::verify_ssl_certificate( $handle, $parsed_url['host'] ) ) { return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) ); } } stream_set_timeout( $handle, $timeout, $utimeout ); if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { // Some proxies require full URL in this field. $request_path = $url; } else { $request_path = $parsed_url['path'] . ( isset( $parsed_url['query'] ) ? '?' . $parsed_url['query'] : '' ); } $headers = strtoupper( $parsed_args['method'] ) . ' ' . $request_path . ' HTTP/' . $parsed_args['httpversion'] . "\r\n"; $include_port_in_host_header = ( ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) || ( 'http' === $parsed_url['scheme'] && 80 !== $parsed_url['port'] ) || ( 'https' === $parsed_url['scheme'] && 443 !== $parsed_url['port'] ) ); if ( $include_port_in_host_header ) { $headers .= 'Host: ' . $parsed_url['host'] . ':' . $parsed_url['port'] . "\r\n"; } else { $headers .= 'Host: ' . $parsed_url['host'] . "\r\n"; } if ( isset( $parsed_args['user-agent'] ) ) { $headers .= 'User-agent: ' . $parsed_args['user-agent'] . "\r\n"; } if ( is_array( $parsed_args['headers'] ) ) { foreach ( (array) $parsed_args['headers'] as $header => $header_value ) { $headers .= $header . ': ' . $header_value . "\r\n"; } } else { $headers .= $parsed_args['headers']; } if ( $proxy->use_authentication() ) { $headers .= $proxy->authentication_header() . "\r\n"; } $headers .= "\r\n"; if ( ! is_null( $parsed_args['body'] ) ) { $headers .= $parsed_args['body']; } fwrite( $handle, $headers ); if ( ! $parsed_args['blocking'] ) { stream_set_blocking( $handle, 0 ); fclose( $handle ); return array( 'headers' => array(), 'body' => '', 'response' => array( 'code' => false, 'message' => false, ), 'cookies' => array(), ); } $response = ''; $body_started = false; $keep_reading = true; $block_size = 4096; if ( isset( $parsed_args['limit_response_size'] ) ) { $block_size = min( $block_size, $parsed_args['limit_response_size'] ); } // If streaming to a file setup the file handle. if ( $parsed_args['stream'] ) { if ( ! WP_DEBUG ) { $stream_handle = @fopen( $parsed_args['filename'], 'w+' ); } else { $stream_handle = fopen( $parsed_args['filename'], 'w+' ); } if ( ! $stream_handle ) { return new WP_Error( 'http_request_failed', sprintf( /* translators: 1: fopen(), 2: File name. */ __( 'Could not open handle for %1$s to %2$s.' ), 'fopen()', $parsed_args['filename'] ) ); } $bytes_written = 0; while ( ! feof( $handle ) && $keep_reading ) { $block = fread( $handle, $block_size ); if ( ! $body_started ) { $response .= $block; if ( strpos( $response, "\r\n\r\n" ) ) { $processed_response = WP_Http::processResponse( $response ); $body_started = true; $block = $processed_response['body']; unset( $response ); $processed_response['body'] = ''; } } $this_block_size = strlen( $block ); if ( isset( $parsed_args['limit_response_size'] ) && ( $bytes_written + $this_block_size ) > $parsed_args['limit_response_size'] ) { $this_block_size = ( $parsed_args['limit_response_size'] - $bytes_written ); $block = substr( $block, 0, $this_block_size ); } $bytes_written_to_file = fwrite( $stream_handle, $block ); if ( $bytes_written_to_file !== $this_block_size ) { fclose( $handle ); fclose( $stream_handle ); return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) ); } $bytes_written += $bytes_written_to_file; $keep_reading = ( ! isset( $parsed_args['limit_response_size'] ) || $bytes_written < $parsed_args['limit_response_size'] ); } fclose( $stream_handle ); } else { $header_length = 0; while ( ! feof( $handle ) && $keep_reading ) { $block = fread( $handle, $block_size ); $response .= $block; if ( ! $body_started && strpos( $response, "\r\n\r\n" ) ) { $header_length = strpos( $response, "\r\n\r\n" ) + 4; $body_started = true; } $keep_reading = ( ! $body_started || ! isset( $parsed_args['limit_response_size'] ) || strlen( $response ) < ( $header_length + $parsed_args['limit_response_size'] ) ); } $processed_response = WP_Http::processResponse( $response ); unset( $response ); } fclose( $handle ); $processed_headers = WP_Http::processHeaders( $processed_response['headers'], $url ); $response = array( 'headers' => $processed_headers['headers'], // Not yet processed. 'body' => null, 'response' => $processed_headers['response'], 'cookies' => $processed_headers['cookies'], 'filename' => $parsed_args['filename'], ); // Handle redirects. $redirect_response = WP_Http::handle_redirects( $url, $parsed_args, $response ); if ( false !== $redirect_response ) { return $redirect_response; } // If the body was chunk encoded, then decode it. if ( ! empty( $processed_response['body'] ) && isset( $processed_headers['headers']['transfer-encoding'] ) && 'chunked' === $processed_headers['headers']['transfer-encoding'] ) { $processed_response['body'] = WP_Http::chunkTransferDecode( $processed_response['body'] ); } if ( true === $parsed_args['decompress'] && true === WP_Http_Encoding::should_decode( $processed_headers['headers'] ) ) { $processed_response['body'] = WP_Http_Encoding::decompress( $processed_response['body'] ); } if ( isset( $parsed_args['limit_response_size'] ) && strlen( $processed_response['body'] ) > $parsed_args['limit_response_size'] ) { $processed_response['body'] = substr( $processed_response['body'], 0, $parsed_args['limit_response_size'] ); } $response['body'] = $processed_response['body']; return $response; } /** * Verifies the received SSL certificate against its Common Names and subjectAltName fields. * * PHP's SSL verifications only verify that it's a valid Certificate, it doesn't verify if * the certificate is valid for the hostname which was requested. * This function verifies the requested hostname against certificate's subjectAltName field, * if that is empty, or contains no DNS entries, a fallback to the Common Name field is used. * * IP Address support is included if the request is being made to an IP address. * * @since 3.7.0 * * @param resource $stream The PHP Stream which the SSL request is being made over * @param string $host The hostname being requested * @return bool If the certificate presented in $stream is valid for $host */ public static function verify_ssl_certificate( $stream, $host ) { $context_options = stream_context_get_options( $stream ); if ( empty( $context_options['ssl']['peer_certificate'] ) ) { return false; } $cert = openssl_x509_parse( $context_options['ssl']['peer_certificate'] ); if ( ! $cert ) { return false; } /* * If the request is being made to an IP address, we'll validate against IP fields * in the cert (if they exist) */ $host_type = ( WP_Http::is_ip_address( $host ) ? 'ip' : 'dns' ); $certificate_hostnames = array(); if ( ! empty( $cert['extensions']['subjectAltName'] ) ) { $match_against = preg_split( '/,\s*/', $cert['extensions']['subjectAltName'] ); foreach ( $match_against as $match ) { list( $match_type, $match_host ) = explode( ':', $match ); if ( strtolower( trim( $match_type ) ) === $host_type ) { // IP: or DNS: $certificate_hostnames[] = strtolower( trim( $match_host ) ); } } } elseif ( ! empty( $cert['subject']['CN'] ) ) { // Only use the CN when the certificate includes no subjectAltName extension. $certificate_hostnames[] = strtolower( $cert['subject']['CN'] ); } // Exact hostname/IP matches. if ( in_array( strtolower( $host ), $certificate_hostnames, true ) ) { return true; } // IP's can't be wildcards, Stop processing. if ( 'ip' === $host_type ) { return false; } // Test to see if the domain is at least 2 deep for wildcard support. if ( substr_count( $host, '.' ) < 2 ) { return false; } // Wildcard subdomains certs (*.example.com) are valid for a.example.com but not a.b.example.com. $wildcard_host = preg_replace( '/^[^.]+\./', '*.', $host ); return in_array( strtolower( $wildcard_host ), $certificate_hostnames, true ); } /** * Determines whether this class can be used for retrieving a URL. * * @since 2.7.0 * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client(). * * @param array $args Optional. Array of request arguments. Default empty array. * @return bool False means this class can not be used, true means it can. */ public static function test( $args = array() ) { if ( ! function_exists( 'stream_socket_client' ) ) { return false; } $is_ssl = isset( $args['ssl'] ) && $args['ssl']; if ( $is_ssl ) { if ( ! extension_loaded( 'openssl' ) ) { return false; } if ( ! function_exists( 'openssl_x509_parse' ) ) { return false; } } /** * Filters whether streams can be used as a transport for retrieving a URL. * * @since 2.7.0 * * @param bool $use_class Whether the class can be used. Default true. * @param array $args Request arguments. */ return apply_filters( 'use_streams_transport', true, $args ); } } /** * Deprecated HTTP Transport method which used fsockopen. * * This class is not used, and is included for backward compatibility only. * All code should make use of WP_Http directly through its API. * * @see WP_HTTP::request * * @since 2.7.0 * @deprecated 3.7.0 Please use WP_HTTP::request() directly */ class WP_HTTP_Fsockopen extends WP_Http_Streams { // For backward compatibility for users who are using the class directly. } Vienna, Prague and Budapest – Connection Plus Travel Europe Ltd.
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Vienna, Prague and Budapest

"Vienna, Prague & Budapest: A Symphony of Central European Splendor"

A day-by-day plan to guide your journey.

  • Day 1 – WELCOME TOPRAGUE

    Spend the day exploring Praguecityat your leisure.
    On arrival we’ll transfer to the hotel.

  • Day 2 - Prague

    You’ll become convinced that Prague is one of Europe’s most attractive cities on our guided tour this morning. Prague Castle is a fantastic monument to Czech history, displaying its story through the complex of architectural styles that’s accumulated within its walls since the 9th century. This afternoon is at leisure for further sightseeing.

    Today includes…

    Excursions & visits: Guided tour of Prague and Prague Castle, including St George’s Basilica, Old Royal Palace and Golden Lane

  • Day 3 - Prague

    Today is at leisure. Perhaps admire the city’s magnificent baroque and Romanesque architecture or simply enjoy the views from the banks of the River Vltava. You’ll also notice the city has a fine cultural tradition going back centuries - Haydn, Beethoven, Liszt and Mozart all spent time in Prague; and it was here that Figaro was first acclaimed and Don Giovanni received its first performance.

  • Day 4 - Vienna

    We journey through endless rolling vistas and dense forest today as we travel to the imperial grandeur of Vienna.

  • Day 5 - Vienna

    Soak up the sights of Vienna on a sightseeing tour. Renowned for its fine buildings, our tour includes views of the lavish, terraced gardens of Prince Eugene’s Belvedere Palace, the State Opera, the sprawling Hofburg residence of Emperor Franz Joseph, and the Parliament buildings.

    Today includes…

    Excursions & visits: Guided tour of Vienna

  • Day 6 - Vienna

    This morning we visit Schonbrunn Palace, a building of architectural splendour, commissioned as a summer residence by Emperor Leopold I for his son Josef I. Marie Antoinette, the Queen of France, spent her childhood there; and it’s said that Mozart astonished the court with his musical performance at the tender age of six. Decorated in the Rococo style of the 18th century, the apartments are adorned with frescoes, crystal chandeliers, priceless tapestries, and furniture. In the courtyard stands the Wagenburg Museum, showing numerous coaches and sleighs from the Imperial era. We return to the city centre, where the remainder of the day is free to further explore this fascinating and historic city.

    Today includes…

    Excursions & visits: Guided tour of Schonbrunn Palace

  • Day 7 - Vienna - Bratislava - Budapest

    We journey to Bratislava for free time in Slovakia’s capital. It has many fine buildings - its baroque and rococo palaces are as elegant as any in Vienna. Late afternoon, we arrive in the beautiful city of Budapest. The plains of Pest are divided from the hilly area of Buda by the scenic River Danube, which inspired writers, artists and musicians for centuries. In Buda, Gellert Hill affords a wonderful view of the city, river and mountains. On the Pest side are the Parliament buildings and the National Museum, which contain remarkable treasures including the oldest skull yet found in Europe and Liszt’s gold baton.

  • Day 8 - Budapest

    Join our guide this morning for a tour of Budapest’s fascinating sights and history. We’ll take the funicular to visit the Fisherman’s Bastion, Matthias Church and the Royal Castle on the Buda side, before crossing the Danube at the Margarete Bridge. In Pest, we’ll see St Stephen’s Basilica, the Parliament buildings, City Park and Heroes’ Square. The afternoon is at leisure to explore further.

    Today includes…

  • Day 9 - Budapest

    Explore the city independently today. Perhaps visit the bustling market hall, or relax and people watch with a coffee in Vorosmarty Square. The city takes on a different perspective at night, so we’ve arranged a wonderful cruise along the River Danube, regarded locally as the main thoroughfare.

    Today includes…

    Excursions & visits: Cruise on the Danube

  • Day 10 - Budapest departure

    We transfer to the airport for your return flight .