WordPressを読む 67-3 /blog/wp-includes/class-http.php 3
2015/04/07
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/blog/wp-includes/class-http.php3
WP_Http_Streams::request()
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 | /** * HTTP request method uses PHP Streams to retrieve the url. * * @since 2.7.0 * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client(). */ 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(). * * @access public * @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() ); $r = wp_parse_args( $args, $defaults ); if ( isset($r['headers']['User-Agent']) ) { $r['user-agent'] = $r['headers']['User-Agent']; unset($r['headers']['User-Agent']); } else if ( isset($r['headers']['user-agent']) ) { $r['user-agent'] = $r['headers']['user-agent']; unset($r['headers']['user-agent']); } // Construct Cookie: header if any cookies are set. WP_Http::buildCookieHeader( $r ); $arrURL = parse_url($url); $connect_host = $arrURL['host']; $secure_transport = ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ); if ( ! isset( $arrURL['port'] ) ) { if ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) { $arrURL['port'] = 443; $secure_transport = true; } else { $arrURL['port'] = 80; } } if ( isset( $r['headers']['Host'] ) || isset( $r['headers']['host'] ) ) { if ( isset( $r['headers']['Host'] ) ) $arrURL['host'] = $r['headers']['Host']; else $arrURL['host'] = $r['headers']['host']; unset( $r['headers']['Host'], $r['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( $r['local'] ) && $r['local']; $ssl_verify = isset( $r['sslverify'] ) && $r['sslverify']; if ( $is_local ) { /** * Filter whether SSL should be verified for local requests. * * @since 2.8.0 * * @param bool $ssl_verify Whether to verify the SSL connection. Default true. */ $ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify ); } elseif ( ! $is_local ) { /** * Filter whether SSL should be verified for non-local requests. * * @since 2.8.0 * * @param bool $ssl_verify Whether to verify the SSL connection. Default true. */ $ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify ); } $proxy = new WP_HTTP_Proxy(); $context = stream_context_create( array( 'ssl' => array( 'verify_peer' => $ssl_verify, //'CN_match' => $arrURL['host'], // This is handled by self::verify_ssl_certificate() 'capture_peer_cert' => $ssl_verify, 'SNI_enabled' => true, 'cafile' => $r['sslcertificates'], 'allow_self_signed' => ! $ssl_verify, ) ) ); $timeout = (int) floor( $r['timeout'] ); $utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['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 ) ) $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 . ':' . $arrURL['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 . ':' . $arrURL['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, $arrURL['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. $requestPath = $url; else $requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' ); if ( empty($requestPath) ) $requestPath .= '/'; $strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n"; if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) $strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n"; else $strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n"; if ( isset($r['user-agent']) ) $strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n"; if ( is_array($r['headers']) ) { foreach ( (array) $r['headers'] as $header => $headerValue ) $strHeaders .= $header . ': ' . $headerValue . "\r\n"; } else { $strHeaders .= $r['headers']; } if ( $proxy->use_authentication() ) $strHeaders .= $proxy->authentication_header() . "\r\n"; $strHeaders .= "\r\n"; if ( ! is_null($r['body']) ) $strHeaders .= $r['body']; fwrite($handle, $strHeaders); if ( ! $r['blocking'] ) { stream_set_blocking( $handle, 0 ); fclose( $handle ); return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); } $strResponse = ''; $bodyStarted = false; $keep_reading = true; $block_size = 4096; if ( isset( $r['limit_response_size'] ) ) $block_size = min( $block_size, $r['limit_response_size'] ); // If streaming to a file setup the file handle. if ( $r['stream'] ) { if ( ! WP_DEBUG ) $stream_handle = @fopen( $r['filename'], 'w+' ); else $stream_handle = fopen( $r['filename'], 'w+' ); if ( ! $stream_handle ) return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) ); $bytes_written = 0; while ( ! feof($handle) && $keep_reading ) { $block = fread( $handle, $block_size ); if ( ! $bodyStarted ) { $strResponse .= $block; if ( strpos( $strResponse, "\r\n\r\n" ) ) { $process = WP_Http::processResponse( $strResponse ); $bodyStarted = true; $block = $process['body']; unset( $strResponse ); $process['body'] = ''; } } $this_block_size = strlen( $block ); if ( isset( $r['limit_response_size'] ) && ( $bytes_written + $this_block_size ) > $r['limit_response_size'] ) $block = substr( $block, 0, ( $r['limit_response_size'] - $bytes_written ) ); $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( $r['limit_response_size'] ) || $bytes_written < $r['limit_response_size']; } fclose( $stream_handle ); } else { $header_length = 0; while ( ! feof( $handle ) && $keep_reading ) { $block = fread( $handle, $block_size ); $strResponse .= $block; if ( ! $bodyStarted && strpos( $strResponse, "\r\n\r\n" ) ) { $header_length = strpos( $strResponse, "\r\n\r\n" ) + 4; $bodyStarted = true; } $keep_reading = ( ! $bodyStarted || !isset( $r['limit_response_size'] ) || strlen( $strResponse ) < ( $header_length + $r['limit_response_size'] ) ); } $process = WP_Http::processResponse( $strResponse ); unset( $strResponse ); } fclose( $handle ); $arrHeaders = WP_Http::processHeaders( $process['headers'], $url ); $response = array( 'headers' => $arrHeaders['headers'], // Not yet processed. 'body' => null, 'response' => $arrHeaders['response'], 'cookies' => $arrHeaders['cookies'], 'filename' => $r['filename'] ); // Handle redirects. if ( false !== ( $redirect_response = WP_HTTP::handle_redirects( $url, $r, $response ) ) ) return $redirect_response; // If the body was chunk encoded, then decode it. if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] ) $process['body'] = WP_Http::chunkTransferDecode($process['body']); if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) ) $process['body'] = WP_Http_Encoding::decompress( $process['body'] ); if ( isset( $r['limit_response_size'] ) && strlen( $process['body'] ) > $r['limit_response_size'] ) $process['body'] = substr( $process['body'], 0, $r['limit_response_size'] ); $response['body'] = $process['body']; return $response; } |
WP_Http_Streams::verify_ssl_certificate()
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | /** * Verifies the received SSL certificate against it's 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 * @static * * @param stream $stream The PHP Stream which the SSL request is being made over * @param string $host The hostname being requested * @return bool If the cerficiate 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 ( $host_type == strtolower( trim( $match_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 ) ) 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 ); } |
WP_Http_Streams::test()
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | /** * Whether this class can be used for retrieving a URL. * * @static * @access public * @since 2.7.0 * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client(). * * @return boolean 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; } /** * Filter 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 ); } } |