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Edit File : class-wp-http-streams.php \| Size : 16.46 KB
<?php /** * 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. } Back

Edit File : class-wp-http-streams.php | Size : 16.46 KB

<?php
/**
 * 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.
}

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