| 1 | <?php |
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| 2 | /** |
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| 3 | * HTTP API: WP_Http_Curl class |
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| 4 | * |
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| 5 | * @package WordPress |
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| 6 | * @subpackage HTTP |
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| 7 | * @since 4.4.0 |
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| 8 | */ |
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| 9 | |
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| 10 | /** |
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| 11 | * Core class used to integrate Curl as an HTTP transport. |
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| 12 | * |
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| 13 | * HTTP request method uses Curl extension to retrieve the url. |
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| 14 | * |
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| 15 | * Requires the Curl extension to be installed. |
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| 16 | * |
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| 17 | * @since 2.7.0 |
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| 18 | * @deprecated 6.4.0 Use WP_Http |
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| 19 | * @see WP_Http |
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| 20 | */ |
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| 21 | #[AllowDynamicProperties] |
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| 22 | class WP_Http_Curl { |
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| 23 | |
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| 24 | /** |
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| 25 | * Temporary header storage for during requests. |
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| 26 | * |
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| 27 | * @since 3.2.0 |
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| 28 | * @var string |
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| 29 | */ |
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| 30 | private $headers = ''; |
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| 31 | |
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| 32 | /** |
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| 33 | * Temporary body storage for during requests. |
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| 34 | * |
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| 35 | * @since 3.6.0 |
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| 36 | * @var string |
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| 37 | */ |
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| 38 | private $body = ''; |
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| 39 | |
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| 40 | /** |
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| 41 | * The maximum amount of data to receive from the remote server. |
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| 42 | * |
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| 43 | * @since 3.6.0 |
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| 44 | * @var int|false |
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| 45 | */ |
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| 46 | private $max_body_length = false; |
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| 47 | |
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| 48 | /** |
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| 49 | * The file resource used for streaming to file. |
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| 50 | * |
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| 51 | * @since 3.6.0 |
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| 52 | * @var resource|false |
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| 53 | */ |
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| 54 | private $stream_handle = false; |
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| 55 | |
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| 56 | /** |
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| 57 | * The total bytes written in the current request. |
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| 58 | * |
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| 59 | * @since 4.1.0 |
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| 60 | * @var int |
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| 61 | */ |
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| 62 | private $bytes_written_total = 0; |
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| 63 | |
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| 64 | /** |
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| 65 | * Send a HTTP request to a URI using cURL extension. |
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| 66 | * |
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| 67 | * @since 2.7.0 |
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| 68 | * |
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| 69 | * @param string $url The request URL. |
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| 70 | * @param string|array $args Optional. Override the defaults. |
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| 71 | * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error |
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| 72 | */ |
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| 73 | public function request( $url, $args = array() ) { |
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| 74 | $defaults = array( |
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| 75 | 'method' => 'GET', |
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| 76 | 'timeout' => 5, |
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| 77 | 'redirection' => 5, |
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| 78 | 'httpversion' => '1.0', |
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| 79 | 'blocking' => true, |
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| 80 | 'headers' => array(), |
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| 81 | 'body' => null, |
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| 82 | 'cookies' => array(), |
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| 83 | 'decompress' => false, |
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| 84 | 'stream' => false, |
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| 85 | 'filename' => null, |
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| 86 | ); |
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| 87 | |
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| 88 | $parsed_args = wp_parse_args( $args, $defaults ); |
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| 89 | |
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| 90 | if ( isset( $parsed_args['headers']['User-Agent'] ) ) { |
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| 91 | $parsed_args['user-agent'] = $parsed_args['headers']['User-Agent']; |
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| 92 | unset( $parsed_args['headers']['User-Agent'] ); |
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| 93 | } elseif ( isset( $parsed_args['headers']['user-agent'] ) ) { |
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| 94 | $parsed_args['user-agent'] = $parsed_args['headers']['user-agent']; |
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| 95 | unset( $parsed_args['headers']['user-agent'] ); |
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| 96 | } |
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| 97 | |
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| 98 | // Construct Cookie: header if any cookies are set. |
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| 99 | WP_Http::buildCookieHeader( $parsed_args ); |
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| 100 | |
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| 101 | $handle = curl_init(); |
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| 102 | |
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| 103 | // cURL offers really easy proxy support. |
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| 104 | $proxy = new WP_HTTP_Proxy(); |
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| 105 | |
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| 106 | if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { |
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| 107 | |
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| 108 | curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP ); |
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| 109 | curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() ); |
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| 110 | curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() ); |
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| 111 | |
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| 112 | if ( $proxy->use_authentication() ) { |
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| 113 | curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY ); |
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| 114 | curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() ); |
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| 115 | } |
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| 116 | } |
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| 117 | |
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| 118 | $is_local = isset( $parsed_args['local'] ) && $parsed_args['local']; |
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| 119 | $ssl_verify = isset( $parsed_args['sslverify'] ) && $parsed_args['sslverify']; |
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| 120 | if ( $is_local ) { |
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| 121 | /** This filter is documented in wp-includes/class-wp-http-streams.php */ |
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| 122 | $ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify, $url ); |
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| 123 | } elseif ( ! $is_local ) { |
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| 124 | /** This filter is documented in wp-includes/class-wp-http.php */ |
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| 125 | $ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify, $url ); |
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| 126 | } |
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| 127 | |
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| 128 | /* |
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| 129 | * CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since. |
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| 130 | * a value of 0 will allow an unlimited timeout. |
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| 131 | */ |
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| 132 | $timeout = (int) ceil( $parsed_args['timeout'] ); |
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| 133 | curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $timeout ); |
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| 134 | curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout ); |
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| 135 | |
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| 136 | curl_setopt( $handle, CURLOPT_URL, $url ); |
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| 137 | curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true ); |
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| 138 | curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( true === $ssl_verify ) ? 2 : false ); |
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| 139 | curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify ); |
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| 140 | |
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| 141 | if ( $ssl_verify ) { |
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| 142 | curl_setopt( $handle, CURLOPT_CAINFO, $parsed_args['sslcertificates'] ); |
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| 143 | } |
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| 144 | |
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| 145 | curl_setopt( $handle, CURLOPT_USERAGENT, $parsed_args['user-agent'] ); |
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| 146 | |
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| 147 | /* |
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| 148 | * The option doesn't work with safe mode or when open_basedir is set, and there's |
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| 149 | * a bug #17490 with redirected POST requests, so handle redirections outside Curl. |
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| 150 | */ |
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| 151 | curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, false ); |
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| 152 | curl_setopt( $handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS ); |
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| 153 | |
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| 154 | switch ( $parsed_args['method'] ) { |
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| 155 | case 'HEAD': |
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| 156 | curl_setopt( $handle, CURLOPT_NOBODY, true ); |
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| 157 | break; |
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| 158 | case 'POST': |
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| 159 | curl_setopt( $handle, CURLOPT_POST, true ); |
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| 160 | curl_setopt( $handle, CURLOPT_POSTFIELDS, $parsed_args['body'] ); |
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| 161 | break; |
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| 162 | case 'PUT': |
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| 163 | curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'PUT' ); |
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| 164 | curl_setopt( $handle, CURLOPT_POSTFIELDS, $parsed_args['body'] ); |
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| 165 | break; |
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| 166 | default: |
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| 167 | curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, $parsed_args['method'] ); |
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| 168 | if ( ! is_null( $parsed_args['body'] ) ) { |
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| 169 | curl_setopt( $handle, CURLOPT_POSTFIELDS, $parsed_args['body'] ); |
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| 170 | } |
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| 171 | break; |
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| 172 | } |
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| 173 | |
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| 174 | if ( true === $parsed_args['blocking'] ) { |
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| 175 | curl_setopt( $handle, CURLOPT_HEADERFUNCTION, array( $this, 'stream_headers' ) ); |
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| 176 | curl_setopt( $handle, CURLOPT_WRITEFUNCTION, array( $this, 'stream_body' ) ); |
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| 177 | } |
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| 178 | |
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| 179 | curl_setopt( $handle, CURLOPT_HEADER, false ); |
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| 180 | |
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| 181 | if ( isset( $parsed_args['limit_response_size'] ) ) { |
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| 182 | $this->max_body_length = (int) $parsed_args['limit_response_size']; |
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| 183 | } else { |
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| 184 | $this->max_body_length = false; |
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| 185 | } |
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| 186 | |
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| 187 | // If streaming to a file open a file handle, and setup our curl streaming handler. |
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| 188 | if ( $parsed_args['stream'] ) { |
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| 189 | if ( ! WP_DEBUG ) { |
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| 190 | $this->stream_handle = @fopen( $parsed_args['filename'], 'w+' ); |
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| 191 | } else { |
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| 192 | $this->stream_handle = fopen( $parsed_args['filename'], 'w+' ); |
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| 193 | } |
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| 194 | if ( ! $this->stream_handle ) { |
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| 195 | return new WP_Error( |
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| 196 | 'http_request_failed', |
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| 197 | sprintf( |
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| 198 | /* translators: 1: fopen(), 2: File name. */ |
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| 199 | __( 'Could not open handle for %1$s to %2$s.' ), |
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| 200 | 'fopen()', |
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| 201 | $parsed_args['filename'] |
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| 202 | ) |
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| 203 | ); |
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| 204 | } |
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| 205 | } else { |
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| 206 | $this->stream_handle = false; |
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| 207 | } |
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| 208 | |
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| 209 | if ( ! empty( $parsed_args['headers'] ) ) { |
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| 210 | // cURL expects full header strings in each element. |
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| 211 | $headers = array(); |
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| 212 | foreach ( $parsed_args['headers'] as $name => $value ) { |
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| 213 | $headers[] = "{$name}: $value"; |
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| 214 | } |
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| 215 | curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers ); |
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| 216 | } |
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| 217 | |
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| 218 | if ( '1.0' === $parsed_args['httpversion'] ) { |
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| 219 | curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 ); |
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| 220 | } else { |
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| 221 | curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 ); |
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| 222 | } |
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| 223 | |
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| 224 | /** |
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| 225 | * Fires before the cURL request is executed. |
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| 226 | * |
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| 227 | * Cookies are not currently handled by the HTTP API. This action allows |
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| 228 | * plugins to handle cookies themselves. |
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| 229 | * |
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| 230 | * @since 2.8.0 |
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| 231 | * |
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| 232 | * @param resource $handle The cURL handle returned by curl_init() (passed by reference). |
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| 233 | * @param array $parsed_args The HTTP request arguments. |
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| 234 | * @param string $url The request URL. |
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| 235 | */ |
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| 236 | do_action_ref_array( 'http_api_curl', array( &$handle, $parsed_args, $url ) ); |
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| 237 | |
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| 238 | // We don't need to return the body, so don't. Just execute request and return. |
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| 239 | if ( ! $parsed_args['blocking'] ) { |
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| 240 | curl_exec( $handle ); |
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| 241 | |
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| 242 | $curl_error = curl_error( $handle ); |
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| 243 | |
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| 244 | if ( $curl_error ) { |
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| 245 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 246 | curl_close( $handle ); |
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| 247 | } |
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| 248 | |
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| 249 | return new WP_Error( 'http_request_failed', $curl_error ); |
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| 250 | } |
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| 251 | |
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| 252 | if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ), true ) ) { |
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| 253 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 254 | curl_close( $handle ); |
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| 255 | } |
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| 256 | |
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| 257 | return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) ); |
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| 258 | } |
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| 259 | |
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| 260 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 261 | curl_close( $handle ); |
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| 262 | } |
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| 263 | |
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| 264 | return array( |
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| 265 | 'headers' => array(), |
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| 266 | 'body' => '', |
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| 267 | 'response' => array( |
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| 268 | 'code' => false, |
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| 269 | 'message' => false, |
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| 270 | ), |
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| 271 | 'cookies' => array(), |
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| 272 | ); |
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| 273 | } |
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| 274 | |
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| 275 | curl_exec( $handle ); |
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| 276 | |
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| 277 | $processed_headers = WP_Http::processHeaders( $this->headers, $url ); |
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| 278 | $body = $this->body; |
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| 279 | $bytes_written_total = $this->bytes_written_total; |
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| 280 | |
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| 281 | $this->headers = ''; |
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| 282 | $this->body = ''; |
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| 283 | $this->bytes_written_total = 0; |
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| 284 | |
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| 285 | $curl_error = curl_errno( $handle ); |
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| 286 | |
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| 287 | // If an error occurred, or, no response. |
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| 288 | if ( $curl_error || ( 0 === strlen( $body ) && empty( $processed_headers['headers'] ) ) ) { |
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| 289 | if ( CURLE_WRITE_ERROR /* 23 */ === $curl_error ) { |
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| 290 | if ( ! $this->max_body_length || $this->max_body_length !== $bytes_written_total ) { |
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| 291 | if ( $parsed_args['stream'] ) { |
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| 292 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 293 | curl_close( $handle ); |
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| 294 | } |
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| 295 | |
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| 296 | fclose( $this->stream_handle ); |
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| 297 | |
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| 298 | return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) ); |
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| 299 | } else { |
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| 300 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 301 | curl_close( $handle ); |
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| 302 | } |
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| 303 | |
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| 304 | return new WP_Error( 'http_request_failed', curl_error( $handle ) ); |
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| 305 | } |
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| 306 | } |
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| 307 | } else { |
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| 308 | $curl_error = curl_error( $handle ); |
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| 309 | |
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| 310 | if ( $curl_error ) { |
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| 311 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 312 | curl_close( $handle ); |
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| 313 | } |
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| 314 | |
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| 315 | return new WP_Error( 'http_request_failed', $curl_error ); |
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| 316 | } |
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| 317 | } |
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| 318 | |
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| 319 | if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ), true ) ) { |
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| 320 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 321 | curl_close( $handle ); |
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| 322 | } |
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| 323 | |
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| 324 | return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) ); |
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| 325 | } |
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| 326 | } |
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| 327 | |
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| 328 | if ( PHP_VERSION_ID < 80000 ) { // curl_close() has no effect as of PHP 8.0. |
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| 329 | curl_close( $handle ); |
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| 330 | } |
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| 331 | |
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| 332 | if ( $parsed_args['stream'] ) { |
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| 333 | fclose( $this->stream_handle ); |
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| 334 | } |
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| 335 | |
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| 336 | $response = array( |
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| 337 | 'headers' => $processed_headers['headers'], |
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| 338 | 'body' => null, |
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| 339 | 'response' => $processed_headers['response'], |
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| 340 | 'cookies' => $processed_headers['cookies'], |
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| 341 | 'filename' => $parsed_args['filename'], |
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| 342 | ); |
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| 343 | |
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| 344 | // Handle redirects. |
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| 345 | $redirect_response = WP_Http::handle_redirects( $url, $parsed_args, $response ); |
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| 346 | if ( false !== $redirect_response ) { |
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| 347 | return $redirect_response; |
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| 348 | } |
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| 349 | |
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| 350 | if ( true === $parsed_args['decompress'] |
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| 351 | && true === WP_Http_Encoding::should_decode( $processed_headers['headers'] ) |
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| 352 | ) { |
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| 353 | $body = WP_Http_Encoding::decompress( $body ); |
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| 354 | } |
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| 355 | |
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| 356 | $response['body'] = $body; |
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| 357 | |
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| 358 | return $response; |
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| 359 | } |
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| 360 | |
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| 361 | /** |
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| 362 | * Grabs the headers of the cURL request. |
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| 363 | * |
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| 364 | * Each header is sent individually to this callback, and is appended to the `$header` property |
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| 365 | * for temporary storage. |
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| 366 | * |
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| 367 | * @since 3.2.0 |
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| 368 | * |
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| 369 | * @param resource $handle cURL handle. |
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| 370 | * @param string $headers cURL request headers. |
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| 371 | * @return int Length of the request headers. |
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| 372 | */ |
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| 373 | private function stream_headers( $handle, $headers ) { |
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| 374 | $this->headers .= $headers; |
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| 375 | return strlen( $headers ); |
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| 376 | } |
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| 377 | |
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| 378 | /** |
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| 379 | * Grabs the body of the cURL request. |
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| 380 | * |
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| 381 | * The contents of the document are passed in chunks, and are appended to the `$body` |
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| 382 | * property for temporary storage. Returning a length shorter than the length of |
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| 383 | * `$data` passed in will cause cURL to abort the request with `CURLE_WRITE_ERROR`. |
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| 384 | * |
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| 385 | * @since 3.6.0 |
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| 386 | * |
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| 387 | * @param resource $handle cURL handle. |
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| 388 | * @param string $data cURL request body. |
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| 389 | * @return int Total bytes of data written. |
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| 390 | */ |
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| 391 | private function stream_body( $handle, $data ) { |
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| 392 | $data_length = strlen( $data ); |
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| 393 | |
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| 394 | if ( $this->max_body_length && ( $this->bytes_written_total + $data_length ) > $this->max_body_length ) { |
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| 395 | $data_length = ( $this->max_body_length - $this->bytes_written_total ); |
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| 396 | $data = substr( $data, 0, $data_length ); |
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| 397 | } |
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| 398 | |
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| 399 | if ( $this->stream_handle ) { |
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| 400 | $bytes_written = fwrite( $this->stream_handle, $data ); |
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| 401 | } else { |
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| 402 | $this->body .= $data; |
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| 403 | $bytes_written = $data_length; |
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| 404 | } |
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| 405 | |
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| 406 | $this->bytes_written_total += $bytes_written; |
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| 407 | |
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| 408 | // Upon event of this function returning less than strlen( $data ) curl will error with CURLE_WRITE_ERROR. |
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| 409 | return $bytes_written; |
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| 410 | } |
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| 411 | |
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| 412 | /** |
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| 413 | * Determines whether this class can be used for retrieving a URL. |
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| 414 | * |
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| 415 | * @since 2.7.0 |
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| 416 | * |
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| 417 | * @param array $args Optional. Array of request arguments. Default empty array. |
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| 418 | * @return bool False means this class can not be used, true means it can. |
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| 419 | */ |
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| 420 | public static function test( $args = array() ) { |
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| 421 | if ( ! function_exists( 'curl_init' ) || ! function_exists( 'curl_exec' ) ) { |
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| 422 | return false; |
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| 423 | } |
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| 424 | |
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| 425 | $is_ssl = isset( $args['ssl'] ) && $args['ssl']; |
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| 426 | |
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| 427 | if ( $is_ssl ) { |
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| 428 | $curl_version = curl_version(); |
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| 429 | // Check whether this cURL version support SSL requests. |
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| 430 | if ( ! ( CURL_VERSION_SSL & $curl_version['features'] ) ) { |
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| 431 | return false; |
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| 432 | } |
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| 433 | } |
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| 434 | |
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| 435 | /** |
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| 436 | * Filters whether cURL can be used as a transport for retrieving a URL. |
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| 437 | * |
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| 438 | * @since 2.7.0 |
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| 439 | * |
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| 440 | * @param bool $use_class Whether the class can be used. Default true. |
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| 441 | * @param array $args An array of request arguments. |
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| 442 | */ |
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| 443 | return apply_filters( 'use_curl_transport', true, $args ); |
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| 444 | } |
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| 445 | } |
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