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<?php
namespace W3TC;
class Util_Http {
/**
* Filter handler for use_curl_transport.
* Workaround to not use curl for extra http methods
*
* @param unknown $result boolean
* @param unknown $args array
* @return boolean
*/
static public function use_curl_transport( $result, $args ) {
if ( isset( $args['method'] ) && $args['method'] != 'GET' && $args['method'] != 'POST' )
return false;
return $result;
}
/**
* Sends HTTP request
*
* @param unknown $url string
* @param unknown $args array
* @return WP_Error|array
*/
static public function request( $url, $args = array() ) {
static $filter_set = false;
if ( !$filter_set ) {
add_filter( 'use_curl_transport',
array( '\W3TC\Util_Http', 'use_curl_transport' ), 10, 2 );
$filter_set = true;
}
$args = array_merge( array(
'user-agent' => W3TC_POWERED_BY
), $args );
return wp_remote_request( $url, $args );
}
/**
* Sends HTTP GET request
*
* @param string $url
* @param array $args
* @return array|WP_Error
*/
static public function get( $url, $args = array() ) {
$args = array_merge( $args, array(
'method' => 'GET'
) );
return self::request( $url, $args );
}
/**
* Downloads URL into a file
*
* @param string $url
* @param string $file
* @return boolean
*/
static public function download( $url, $file, $args = array() ) {
if ( strpos( $url, '//' ) === 0 ) {
$url = ( Util_Environment::is_https() ? 'https:' : 'http:' ) . $url;
}
$response = self::get( $url, $args );
if ( !is_wp_error( $response ) && $response['response']['code'] == 200 ) {
return @file_put_contents( $file, $response['body'] );
}
return false;
}
/**
* Returns upload info
*
* @return array
*/
static public function upload_info() {
static $upload_info = null;
if ( $upload_info === null ) {
$upload_info = Util_Environment::wp_upload_dir();
if ( empty( $upload_info['error'] ) ) {
$parse_url = @parse_url( $upload_info['baseurl'] );
if ( $parse_url ) {
$baseurlpath = ( !empty( $parse_url['path'] ) ? trim( $parse_url['path'], '/' ) : '' );
} else {
$baseurlpath = 'wp-content/uploads';
}
$upload_info['baseurlpath'] = '/' . $baseurlpath . '/';
} else {
$upload_info = false;
}
}
return $upload_info;
}
/**
* Test the time to first byte.
*
* @param string $url URL address.
* @param bool $nocache Whether or not to request no cache response, by sending a Cache-Control header.
* @return float|false Time in seconds until the first byte is about to be transferred or false on error.
*/
public static function ttfb( $url, $nocache = false ) {
$ch = curl_init( esc_url( $url ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions
$pass = (bool) $ch;
$ttfb = false;
$opts = array(
CURLOPT_FORBID_REUSE => 1,
CURLOPT_FRESH_CONNECT => 1,
CURLOPT_HEADER => 0,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_USERAGENT => 'WordPress/' . get_bloginfo( 'version' ) . '; ' . get_bloginfo( 'url' ),
);
if ( $nocache ) {
$opts[ CURLOPT_HTTPHEADER ] = array(
'Cache-Control: no-cache',
'Pragma: no-cache',
);
$qs_arr = explode( '&', wp_parse_url( $url, PHP_URL_QUERY ) );
array_push( $qs_arr, 'time=' . microtime( true ) );
$opts[ CURLOPT_URL ] = $url . '?' . implode( '&', $qs_arr );
}
if ( $ch ) {
$pass = curl_setopt_array( $ch, $opts ); // phpcs:ignore WordPress.WP.AlternativeFunctions
}
if ( $pass ) {
$pass = (bool) curl_exec( $ch ); // phpcs:ignore WordPress.WP.AlternativeFunctions
}
if ( $pass ) {
$ttfb = curl_getinfo( $ch, CURLINFO_STARTTRANSFER_TIME ); // phpcs:ignore WordPress.WP.AlternativeFunctions
}
if ( $ch ) {
curl_close( $ch ); // phpcs:ignore WordPress.WP.AlternativeFunctions
}
return $ttfb;
}
/**
* Retrieve HTTP headers.
*
* @param string $url URL address.
* @return array
*/
public static function get_headers( $url ) {
$ch = curl_init( $url ); // phpcs:ignore WordPress.WP.AlternativeFunctions
$pass = (bool) $ch;
$headers = array();
$opts = array(
CURLOPT_FORBID_REUSE => 1,
CURLOPT_FRESH_CONNECT => 1,
CURLOPT_HEADER => 1,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_USERAGENT => 'WordPress/' . get_bloginfo( 'version' ) . '; ' . get_bloginfo( 'url' ),
CURLOPT_HTTPHEADER => array(
'Cache-Control: no-cache',
'Pragma: no-cache',
),
);
if ( $pass ) {
$pass = curl_setopt_array( $ch, $opts ); // phpcs:ignore WordPress.WP.AlternativeFunctions
}
if ( $pass ) {
$response = curl_exec( $ch ); // phpcs:ignore WordPress.WP.AlternativeFunctions
}
if ( $response ) {
$header_size = curl_getinfo( $ch, CURLINFO_HEADER_SIZE ); // phpcs:ignore WordPress.WP.AlternativeFunctions
$header = substr( $response, 0, $header_size );
foreach ( explode( "\r\n", $header ) as $index => $line ) {
if ( 0 === $index ) {
$headers['http_code'] = $line;
$http_code_arr = explode( ' ', $line );
$headers['protocol'] = $http_code_arr[0];
$headers['status'] = $http_code_arr[1];
} elseif ( ! empty( $line ) && false !== strpos( $line, ':' ) ) {
list ( $key, $value ) = explode( ': ', $line );
$headers[ $key ] = $value;
}
}
}
if ( $ch ) {
curl_close( $ch ); // phpcs:ignore WordPress.WP.AlternativeFunctions
}
return $headers;
}
}