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a8c-files.php
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a8c-files.php
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<?php
/*
Plugin Name: Automattic File Hosting Service
Description: Provides a hosted, distributed and fault tolerant files service
Author: Automattic
Version: 0.2
Author URI: http://automattic.com/
*/
/* Requires at least: 3.9.0
* due to the dependancy on the filter 'wp_insert_attachment_data'
* used to catch imports and push the files to the VIP MogileFS service
*/
if ( ! defined( 'FILE_SERVICE_ENDPOINT' ) )
define( 'FILE_SERVICE_ENDPOINT', 'files.vipv2.net' );
define( 'LOCAL_UPLOADS', '/tmp/uploads' );
class A8C_Files {
function __construct() {
// Hooks for the mu-plugin WordPress Importer
add_filter( 'load-importer-wordpress', array( &$this, 'check_to_download_file' ), 10 );
add_filter( 'wp_insert_attachment_data', array( &$this, 'check_to_upload_file' ), 10, 2 );
add_filter( 'wp_handle_upload_prefilter', array( &$this, 'get_unique_filename' ), 10, 1 );
add_filter( 'wp_handle_sideload_prefilter', array( &$this, 'get_unique_filename' ), 10, 1 );
add_filter( 'upload_dir', array( &$this, 'get_upload_dir' ), 10, 1 );
add_filter( 'wp_handle_upload', array( &$this, 'upload_file' ), 10, 2 );
add_filter( 'wp_delete_file', array( &$this, 'delete_file' ), 20, 1 );
add_filter( 'wp_save_image_file', array( &$this, 'save_image_file' ), 10, 5 );
add_filter( 'wp_save_image_editor_file', array( &$this, 'save_image_file' ), 10, 5 );
add_filter( 'image_downsize', array( &$this, 'image_resize' ), 5, 3 ); // Ensure this runs before Jetpack, when Photon is active
// Automatic creation of intermediate image sizes is disabled via `wpcom_intermediate_sizes()`
// ensure we always upload with year month folder layouts
add_filter( 'pre_option_uploads_use_yearmonth_folders', function( $arg ) { return '1'; } );
}
function check_to_upload_file( $data, $postarr ) {
// Check if this is an import or a local image_editor->save
if ( 0 < intval( $postarr['import_id'] ) || ! $this->attachment_file_exists( $postarr['guid'] ) ) {
$url_parts = parse_url( $postarr['guid'] );
$uploads = wp_upload_dir();
if ( false !== $uploads['error'] )
return $data;
$dir_file_parts = explode( '/', $url_parts['path'] );
if ( 3 > count( $dir_file_parts ) )
return $data;
$local_file_path = implode( '/', array_splice( $dir_file_parts, count( $dir_file_parts ) - 3 ) );
$filename = constant( 'LOCAL_UPLOADS' ) . '/' . $local_file_path;
$file = array(
'file' => $filename,
'url' => $this->get_files_service_hostname() . $url_parts['path'],
'type' => $postarr['post_mime_type'],
'error' => 0,
);
$file = $this->upload_file( $file, 'attachment_import' );
// did the file get renamed due to a name clash, if so record the change
if ( basename( $url_parts['path'] ) != basename( $file['file'] ) ) {
$data['guid'] = str_replace( basename( $url_parts['path'] ),
basename( $file['file'] ), $data['guid'] );
}
}
return $data;
}
// Supports the mu-plugin WordPress Importer
// Ensures a local copy of the imported xml file is available for local reading at the final import step
function check_to_download_file() {
$step = empty( $_GET['step'] ) ? 0 : (int) $_GET['step'];
if ( 2 !== $step )
return;
$this->id = (int) $_POST['import_id'];
$file = get_attached_file( $this->id );
if ( ! $file || file_exists( $file ) )
return;
$file_url = str_ireplace( constant( 'LOCAL_UPLOADS' ),
$this->get_files_service_hostname() . '/' . $this->get_upload_path(),
$file );
$opts = array(
'http' => array(
'method' => "GET",
'header' => 'X-Client-Site-ID: ' . FILES_CLIENT_SITE_ID . "\r\n",
)
);
$context = stream_context_create( $opts );
$file_data = file_get_contents( $file_url, false, $context );
if ( $file_data ) {
$directory = pathinfo( $file )['dirname'];
if ( ! file_exists( $directory ) )
mkdir( $directory, 0777, true );
file_put_contents( $file, $file_data );
register_shutdown_function( 'unlink', $file );
}
}
function save_image_file( $override, $filename, $image, $mime_type, $post_id ) {
$return = $image->save( $filename, $mime_type );
if ( ! $return || is_wp_error( $return ) || ! file_exists( $filename ) )
return false;
$url_parts = parse_url( $filename );
if ( false !== stripos( $url_parts['path'], constant( 'LOCAL_UPLOADS' ) ) )
$file_uri = substr( $url_parts['path'], stripos( $url_parts['path'], constant( 'LOCAL_UPLOADS' ) ) + strlen( constant( 'LOCAL_UPLOADS' ) ) );
else
$file_uri = '/' . $url_parts['path'];
$service_url = $this->get_files_service_hostname() . '/' . $this->get_upload_path();
if ( is_multisite() && ! ( is_main_network() && is_main_site() ) ) {
$service_url .= '/sites/' . get_current_blog_id();
}
$file = array(
'file' => $filename,
'url' => $service_url . $file_uri,
'type' => $mime_type,
'error' => 0,
);
$this->upload_file( $file, 'editor_save' );
return ( 0 === $file['error'] );
}
function get_upload_dir( $upload ) {
$upload['path'] = constant( 'LOCAL_UPLOADS' ) . $upload['subdir'];
$upload['basedir'] = constant( 'LOCAL_UPLOADS' );
return $upload;
}
function attachment_file_exists( $file_url ) {
$url_parts = parse_url( $file_url );
$post_url = $this->get_files_service_hostname() . $url_parts['path'];
$headers = array(
'X-Client-Site-ID: ' . constant( 'FILES_CLIENT_SITE_ID' ),
'X-Access-Token: ' . constant( 'FILES_ACCESS_TOKEN' ),
'X-Action: file_exists',
);
$ch = curl_init( $post_url );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, false );
curl_setopt( $ch, CURLOPT_HEADER, false );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch, CURLOPT_TIMEOUT, 10 );
curl_setopt( $ch, CURLOPT_VERBOSE, true );
curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 );
curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, 0 );
curl_exec( $ch );
$http_code = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
curl_close( $ch );
return ( 200 == $http_code );
}
function get_unique_filename( $file ) {
$filename = strtolower( $file['name'] );
$info = pathinfo( $filename );
$ext = $info['extension'];
$name = basename( $filename, ".{$ext}" );
if( $name === ".$ext" )
$name = '';
$number = '';
if ( empty( $ext ) )
$ext = '';
else
$ext = strtolower( ".$ext" );
$filename = str_replace( $ext, '', $filename );
$filename = str_replace( '%', '', sanitize_title_with_dashes( $filename ) ) . $ext;
$headers = array(
'X-Client-Site-ID: ' . constant( 'FILES_CLIENT_SITE_ID' ),
'X-Access-Token: ' . constant( 'FILES_ACCESS_TOKEN' ),
'X-Action: unique_filename',
);
if ( ! ( ( $uploads = wp_upload_dir() ) && false === $uploads['error'] ) ) {
$file['error'] = $uploads['error'];
return $file;
}
$url_parts = parse_url( $uploads['url'] . '/' . $filename );
$file_path = $url_parts['path'];
if ( is_multisite() &&
preg_match( '/^\/[_0-9a-zA-Z-]+\/' . str_replace( '/', '\/', $this->get_upload_path() ) . '\/sites\/[0-9]+\//', $file_path ) ) {
$file_path = preg_replace( '/^\/[_0-9a-zA-Z-]+/', '', $file_path );
}
$post_url = $this->get_files_service_hostname() . $file_path;
$ch = curl_init( $post_url );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch, CURLOPT_HEADER, false );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch, CURLOPT_TIMEOUT, 10 );
curl_setopt( $ch, CURLOPT_VERBOSE, true );
curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 );
curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, 0 );
$content = curl_exec( $ch );
$http_code = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
curl_close( $ch );
if ( 200 == $http_code ) {
$obj = json_decode( $content );
if ( isset( $obj->filename ) && basename( $obj->filename ) != basename( $post_url ) )
$file['name'] = $obj->filename;
} else if ( 406 == $http_code ) {
$file['error'] = __( 'The file type you uploaded is not supported.' );
} else {
$file['error'] = sprintf( __( 'Error getting the file name from the remote servers: Code %d' ), $http_code );
}
return $file;
}
function upload_file( $details, $upload_type ) {
if ( ! file_exists( $details['file'] ) ) {
$details['error'] = sprintf( __( 'The specified local upload file does not exist.' ) );
return $details;
}
if ( 'editor_save' == $upload_type ) {
$post_url = $details['url'];
} else {
$url_parts = parse_url( $details['url'] );
$file_path = $url_parts['path'];
if ( is_multisite() &&
preg_match( '/^\/[_0-9a-zA-Z-]+\/' . str_replace( '/', '\/', $this->get_upload_path() ) . '\/sites\/[0-9]+\//', $file_path ) ) {
$file_path = preg_replace( '/^\/[_0-9a-zA-Z-]+/', '', $file_path );
$details['url'] = $url_parts['scheme'] . '://' . $url_parts['host'] . $file_path;
}
$post_url = $this->get_files_service_hostname() . $file_path;
}
$headers = array(
'X-Client-Site-ID: ' . constant( 'FILES_CLIENT_SITE_ID' ),
'X-Access-Token: ' . constant( 'FILES_ACCESS_TOKEN' ),
'Content-Type: ' . $details['type'],
'Content-Length: ' . filesize( $details['file'] ),
'Connection: Keep-Alive',
);
$stream = fopen( $details['file'], 'r' );
$ch = curl_init( $post_url );
curl_setopt( $ch, CURLOPT_PUT, true );
curl_setopt( $ch, CURLOPT_INFILE, $stream );
curl_setopt( $ch, CURLOPT_INFILESIZE, filesize( $details['file'] ) );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch, CURLOPT_HEADER, false );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch, CURLOPT_TIMEOUT, 10 + (int)( filesize( $details['file'] ) / 512000 ) ); // 10 plus 1 second per 500k
curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 );
curl_setopt( $ch, CURLOPT_READFUNCTION,
function( $ch, $fd, $length ) use( $stream ) {
$data = fread( $stream, $length );
if ( null == $data )
return 0;
else
return $data;
});
$ret_data = curl_exec( $ch );
$http_code = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
curl_close( $ch );
fclose( $stream );
register_shutdown_function( 'unlink', $details['file'] );
switch ( $http_code ) {
case 200:
if ( 0 < strlen( $ret_data ) ) {
$obj = json_decode( $ret_data );
if ( isset( $obj->filename ) && basename( $obj->filename ) != basename( $post_url ) ) {
$uploads = wp_upload_dir();
if ( false === $uploads['error'] ) {
@copy( $details['file'], $uploads['path'] . '/' . $obj->filename );
register_shutdown_function( 'unlink', $uploads['path'] . '/' . $obj->filename );
}
$details['file'] = str_replace( basename( $post_url ), basename( $obj->filename ), $details['file'] );
}
}
break;
case 204:
$details['error'] = sprintf( __( 'You have exceeded your file space quota.' ) );
break;
default:
$details['error'] = sprintf( __( 'Error uploading the file to the remote servers: Code %d' ), $http_code );
break;
}
return $details;
}
function delete_file( $file_name ) {
$url_parts = parse_url( $file_name );
if ( false !== stripos( $url_parts['path'], constant( 'LOCAL_UPLOADS' ) ) )
$file_uri = substr( $url_parts['path'], stripos( $url_parts['path'], constant( 'LOCAL_UPLOADS' ) ) + strlen( constant( 'LOCAL_UPLOADS' ) ) );
else
$file_uri = '/' . $url_parts['path'];
$headers = array(
'X-Client-Site-ID: ' . constant( 'FILES_CLIENT_SITE_ID' ),
'X-Access-Token: ' . constant( 'FILES_ACCESS_TOKEN' ),
);
$service_url = $this->get_files_service_hostname() . '/' . $this->get_upload_path();
if ( is_multisite() && ! ( is_main_network() && is_main_site() ) ) {
$service_url .= '/sites/' . get_current_blog_id();
}
$ch = curl_init( $service_url . $file_uri );
curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, 'DELETE' );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch, CURLOPT_HEADER, false );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch, CURLOPT_TIMEOUT, 10 );
curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 );
curl_exec( $ch );
$http_code = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
curl_close( $ch );
if ( 200 != $http_code ) {
error_log( sprintf( __( 'Error deleting the file from the remote servers: Code %d' ), $http_code ) );
return;
}
// We successfully deleted the file, purge the file from the caches
$invalidation_url = get_site_url() . '/' . $this->get_upload_path();
if ( is_multisite() && ! ( is_main_network() && is_main_site() ) ) {
$invalidation_url .= '/sites/' . get_current_blog_id();
}
$invalidation_url .= $file_uri;
$this->purge_file_cache( $invalidation_url, 'PURGE' );
}
private function purge_file_cache( $url, $method ) {
global $file_cache_servers;
$requests = array();
if ( ! isset( $file_cache_servers ) || empty( $file_cache_servers ) )
return $requests;
$parsed = parse_url( $url );
if ( empty( $parsed['host'] ) )
return $requests;
foreach ( $file_cache_servers as $server ) {
$server = explode( ':', $server[0] );
$uri = '/';
if ( isset( $parsed['path'] ) )
$uri = $parsed['path'];
if ( isset( $parsed['query'] ) )
$uri .= $parsed['query'];
$requests[] = array(
'ip' => $server[0],
'port' => $server[1],
'host' => $parsed['host'],
'uri' => $uri,
'method' => $method,
);
}
$this->purge_cache_servers( $requests );
}
private function purge_cache_servers( $requests ) {
$curl_multi = curl_multi_init();
foreach ( $requests as $req ) {
$curl = curl_init();
curl_setopt( $curl, CURLOPT_URL, "http://{$req['ip']}{$req['uri']}" );
curl_setopt( $curl, CURLOPT_PORT, $req['port'] );
curl_setopt( $curl, CURLOPT_HTTPHEADER, array( "Host: {$req['host']}" ) );
curl_setopt( $curl, CURLOPT_CUSTOMREQUEST, $req['method'] );
curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $curl, CURLOPT_NOBODY, true );
curl_setopt( $curl, CURLOPT_HEADER, true );
curl_setopt( $curl, CURLOPT_TIMEOUT, 5 );
curl_multi_add_handle( $curl_multi, $curl );
}
$running = true;
while ( $running ) {
do {
$result = curl_multi_exec( $curl_multi, $running );
} while ( $result == CURLM_CALL_MULTI_PERFORM );
if ( $result != CURLM_OK )
error_log( 'curl_multi_exec() returned something different than CURLM_OK' );
curl_multi_select( $curl_multi, 0.2 );
}
while ( $completed = curl_multi_info_read( $curl_multi ) ) {
$info = curl_getinfo( $completed['handle'] );
if ( ! $info['http_code'] && curl_error( $completed['handle'] ) )
error_log( 'Error on: ' . $info['url'] . ' error: ' . curl_error( $completed['handle'] ) . "\n" );
if ( '200' != $info['http_code'] )
error_log( 'Request to ' . $info['url'] . ' returned HTTP code ' . $info['http_code'] . "\n" );
curl_multi_remove_handle( $curl_multi, $completed['handle'] );
}
curl_multi_close( $curl_multi );
}
private function get_upload_path() {
$upload_path = trim( get_option( 'upload_path' ) );
if ( empty( $upload_path ) )
return 'wp-content/uploads';
else
return $upload_path;
}
function get_files_service_hostname() {
return 'https://' . FILE_SERVICE_ENDPOINT;
}
/**
* Image resizing service. Takes place of image_downsize().
*
* @param bool $ignore Unused.
* @param int $id Attachment ID for image.
* @param array|string $size Optional, default is 'medium'. Size of image, either array or string.
* @return bool|array False on failure, array on success.
* @see image_downsize()
*/
function image_resize( $ignore, $id, $size ) {
global $_wp_additional_image_sizes, $post;
$content_width = isset( $GLOBALS['content_width'] ) ? $GLOBALS['content_width'] : null;
$crop = false;
// For resize requests coming from an image's attachment page, override
// the supplied $size and use the user-defined $content_width if the
// theme-defined $content_width has been manually passed in.
if ( is_attachment() && $id === $post->ID ) {
if ( is_array( $size )
&& ! empty ( $size )
&& isset( $GLOBALS['content_width'] )
&& $size[0] == $GLOBALS['content_width'] ) {
$size = array( $content_width, $content_width );
}
}
if ( 'tellyworth' == $size ) { // 'full' is reserved because some themes use it (see image_constrain_size_for_editor)
$_max_w = 4096;
$_max_h = 4096;
} elseif ( 'thumbnail' == $size ) {
$_max_w = get_option( 'thumbnail_size_w' );
$_max_h = get_option( 'thumbnail_size_h' );
if ( !$_max_w && !$_max_h ) {
$_max_w = 128;
$_max_h = 96;
}
if ( get_option( 'thumbnail_crop' ) )
$crop = true;
} elseif ( 'medium' == $size ) {
$_max_w = get_option( 'medium_size_w' );
$_max_h = get_option( 'medium_size_h' );
if ( !$_max_w && !$_max_h ) {
$_max_w = 300;
$_max_h = 300;
}
} elseif ( 'large' == $size ) {
$_max_w = get_option( 'large_size_w' );
$_max_h = get_option( 'large_size_h' );
} elseif ( is_array( $size ) ) {
$_max_w = $w = $size[0];
$_max_h = $h = $size[1];
} elseif ( ! empty( $_wp_additional_image_sizes[$size] ) ) {
$_max_w = $w = $_wp_additional_image_sizes[$size]['width'];
$_max_h = $h = $_wp_additional_image_sizes[$size]['height'];
$crop = $_wp_additional_image_sizes[$size]['crop'];
} elseif ( $content_width > 0 ) {
$_max_w = $content_width;
$_max_h = 0;
} else {
$_max_w = 1024;
$_max_h = 0;
}
// Constrain default image sizes to the theme's content width, if available.
if ( $content_width > 0 && in_array( $size, array( 'thumbnail', 'medium', 'large' ) ) )
$_max_w = min( $_max_w, $content_width );
$resized = false;
$img_url = wp_get_attachment_url( $id );
if ( ! $crop ) {
$imagedata = wp_get_attachment_metadata( $id );
if ( ! empty( $imagedata['width'] ) || ! empty( $imagedata['height'] ) ) {
$h = $imagedata['height'];
$w = $imagedata['width'];
list ($w, $h) = wp_constrain_dimensions( $w, $h, $_max_w, $_max_h );
if ( $w < $imagedata['width'] || $h < $imagedata['height'] )
$resized = true;
} else {
$w = $_max_w;
$h = $_max_h;
}
}
if ( $crop ) {
$constrain = false;
$imagedata = wp_get_attachment_metadata( $id );
if ( $imagedata ) {
$w = $imagedata['width'];
$h = $imagedata['height'];
}
if ( empty( $w ) )
$w = $_max_w;
if ( empty( $h ) )
$h = $_max_h;
// If the image width is bigger than the allowed max, scale it to match
if ( $w >= $_max_w )
$w = $_max_w;
else
$constrain = true;
// If the image height is bigger than the allowed max, scale it to match
if ( $h >= $_max_h )
$h = $_max_h;
else
$constrain = true;
if ( $constrain )
list( $w, $h ) = wp_constrain_dimensions( $w, $h, $_max_w, $_max_h );
$img_url = add_query_arg( 'w', $w, $img_url );
$img_url = add_query_arg( 'h', $h, $img_url );
$img_url = add_query_arg( 'crop', '1', $img_url );
$resized = true;
}
// we want users to be able to resize full size images with tinymce.
// the image_add_wh() filter will add the ?w= query string at display time.
elseif ( 'full' != $size ) {
$img_url = add_query_arg( 'w', $w, $img_url );
$resized = true;
}
return array( $img_url, $w, $h, $resized );
}
}
function a8c_files_init() {
new A8C_Files();
}
/**
* Prevent WP from creating intermediate image sizes
*
* Function name parallels wpcom's implementation to accommodate existing code
*/
function wpcom_intermediate_sizes( $sizes ) {
__return_empty_array();
}
if ( defined( 'FILES_CLIENT_SITE_ID' ) && defined( 'FILES_ACCESS_TOKEN' ) ) {
add_action( 'init', 'a8c_files_init' );
add_filter( 'intermediate_image_sizes', 'wpcom_intermediate_sizes' );
add_filter( 'intermediate_image_sizes_advanced', 'wpcom_intermediate_sizes' );
}