+++ /dev/null
-<?php
-/**
- * +---------------------------------------------------------------------------+
- * | memcached client, PHP |
- * +---------------------------------------------------------------------------+
- * | Copyright (c) 2003 Ryan T. Dean <rtdean@cytherianage.net> |
- * | All rights reserved. |
- * | |
- * | Redistribution and use in source and binary forms, with or without |
- * | modification, are permitted provided that the following conditions |
- * | are met: |
- * | |
- * | 1. Redistributions of source code must retain the above copyright |
- * | notice, this list of conditions and the following disclaimer. |
- * | 2. Redistributions in binary form must reproduce the above copyright |
- * | notice, this list of conditions and the following disclaimer in the |
- * | documentation and/or other materials provided with the distribution. |
- * | |
- * | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
- * | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
- * | OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
- * | IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
- * | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
- * | NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
- * | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
- * | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
- * | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
- * | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
- * +---------------------------------------------------------------------------+
- * | Author: Ryan T. Dean <rtdean@cytherianage.net> |
- * | Heavily influenced by the Perl memcached client by Brad Fitzpatrick. |
- * | Permission granted by Brad Fitzpatrick for relicense of ported Perl |
- * | client logic under 2-clause BSD license. |
- * +---------------------------------------------------------------------------+
- *
- * @file
- * $TCAnet$
- */
-
-/**
- * This is the PHP client for memcached - a distributed memory cache daemon.
- * More information is available at http://www.danga.com/memcached/
- *
- * Usage example:
- *
- * require_once 'memcached.php';
- *
- * $mc = new MWMemcached(array(
- * 'servers' => array('127.0.0.1:10000',
- * array('192.0.0.1:10010', 2),
- * '127.0.0.1:10020'),
- * 'debug' => false,
- * 'compress_threshold' => 10240,
- * 'persistant' => true));
- *
- * $mc->add('key', array('some', 'array'));
- * $mc->replace('key', 'some random string');
- * $val = $mc->get('key');
- *
- * @author Ryan T. Dean <rtdean@cytherianage.net>
- * @version 0.1.2
- */
-
-// {{{ requirements
-// }}}
-
-// {{{ class MWMemcached
-/**
- * memcached client class implemented using (p)fsockopen()
- *
- * @author Ryan T. Dean <rtdean@cytherianage.net>
- * @ingroup Cache
- */
-class MWMemcached {
- // {{{ properties
- // {{{ public
-
- // {{{ constants
- // {{{ flags
-
- /**
- * Flag: indicates data is serialized
- */
- const SERIALIZED = 1;
-
- /**
- * Flag: indicates data is compressed
- */
- const COMPRESSED = 2;
-
- // }}}
-
- /**
- * Minimum savings to store data compressed
- */
- const COMPRESSION_SAVINGS = 0.20;
-
- // }}}
-
-
- /**
- * Command statistics
- *
- * @var array
- * @access public
- */
- var $stats;
-
- // }}}
- // {{{ private
-
- /**
- * Cached Sockets that are connected
- *
- * @var array
- * @access private
- */
- var $_cache_sock;
-
- /**
- * Current debug status; 0 - none to 9 - profiling
- *
- * @var boolean
- * @access private
- */
- var $_debug;
-
- /**
- * Dead hosts, assoc array, 'host'=>'unixtime when ok to check again'
- *
- * @var array
- * @access private
- */
- var $_host_dead;
-
- /**
- * Is compression available?
- *
- * @var boolean
- * @access private
- */
- var $_have_zlib;
-
- /**
- * Do we want to use compression?
- *
- * @var boolean
- * @access private
- */
- var $_compress_enable;
-
- /**
- * At how many bytes should we compress?
- *
- * @var integer
- * @access private
- */
- var $_compress_threshold;
-
- /**
- * Are we using persistant links?
- *
- * @var boolean
- * @access private
- */
- var $_persistant;
-
- /**
- * If only using one server; contains ip:port to connect to
- *
- * @var string
- * @access private
- */
- var $_single_sock;
-
- /**
- * Array containing ip:port or array(ip:port, weight)
- *
- * @var array
- * @access private
- */
- var $_servers;
-
- /**
- * Our bit buckets
- *
- * @var array
- * @access private
- */
- var $_buckets;
-
- /**
- * Total # of bit buckets we have
- *
- * @var integer
- * @access private
- */
- var $_bucketcount;
-
- /**
- * # of total servers we have
- *
- * @var integer
- * @access private
- */
- var $_active;
-
- /**
- * Stream timeout in seconds. Applies for example to fread()
- *
- * @var integer
- * @access private
- */
- var $_timeout_seconds;
-
- /**
- * Stream timeout in microseconds
- *
- * @var integer
- * @access private
- */
- var $_timeout_microseconds;
-
- /**
- * Connect timeout in seconds
- */
- var $_connect_timeout;
-
- /**
- * Number of connection attempts for each server
- */
- var $_connect_attempts;
-
- // }}}
- // }}}
- // {{{ methods
- // {{{ public functions
- // {{{ memcached()
-
- /**
- * Memcache initializer
- *
- * @param $args Array Associative array of settings
- *
- * @return mixed
- */
- public function __construct( $args ) {
- global $wgMemCachedTimeout;
- $this->set_servers( isset( $args['servers'] ) ? $args['servers'] : array() );
- $this->_debug = isset( $args['debug'] ) ? $args['debug'] : false;
- $this->stats = array();
- $this->_compress_threshold = isset( $args['compress_threshold'] ) ? $args['compress_threshold'] : 0;
- $this->_persistant = isset( $args['persistant'] ) ? $args['persistant'] : false;
- $this->_compress_enable = true;
- $this->_have_zlib = function_exists( 'gzcompress' );
-
- $this->_cache_sock = array();
- $this->_host_dead = array();
-
- $this->_timeout_seconds = 0;
- $this->_timeout_microseconds = $wgMemCachedTimeout;
-
- $this->_connect_timeout = 0.01;
- $this->_connect_attempts = 2;
- }
-
- // }}}
- // {{{ add()
-
- /**
- * Adds a key/value to the memcache server if one isn't already set with
- * that key
- *
- * @param $key String: key to set with data
- * @param $val Mixed: value to store
- * @param $exp Integer: (optional) Expiration time. This can be a number of seconds
- * to cache for (up to 30 days inclusive). Any timespans of 30 days + 1 second or
- * longer must be the timestamp of the time at which the mapping should expire. It
- * is safe to use timestamps in all cases, regardless of exipration
- * eg: strtotime("+3 hour")
- *
- * @return Boolean
- */
- public function add( $key, $val, $exp = 0 ) {
- return $this->_set( 'add', $key, $val, $exp );
- }
-
- // }}}
- // {{{ decr()
-
- /**
- * Decrease a value stored on the memcache server
- *
- * @param $key String: key to decrease
- * @param $amt Integer: (optional) amount to decrease
- *
- * @return Mixed: FALSE on failure, value on success
- */
- public function decr( $key, $amt = 1 ) {
- return $this->_incrdecr( 'decr', $key, $amt );
- }
-
- // }}}
- // {{{ delete()
-
- /**
- * Deletes a key from the server, optionally after $time
- *
- * @param $key String: key to delete
- * @param $time Integer: (optional) how long to wait before deleting
- *
- * @return Boolean: TRUE on success, FALSE on failure
- */
- public function delete( $key, $time = 0 ) {
- if ( !$this->_active ) {
- return false;
- }
-
- $sock = $this->get_sock( $key );
- if ( !is_resource( $sock ) ) {
- return false;
- }
-
- $key = is_array( $key ) ? $key[1] : $key;
-
- if ( isset( $this->stats['delete'] ) ) {
- $this->stats['delete']++;
- } else {
- $this->stats['delete'] = 1;
- }
- $cmd = "delete $key $time\r\n";
- if( !$this->_safe_fwrite( $sock, $cmd, strlen( $cmd ) ) ) {
- $this->_dead_sock( $sock );
- return false;
- }
- $res = trim( fgets( $sock ) );
-
- if ( $this->_debug ) {
- $this->_debugprint( sprintf( "MemCache: delete %s (%s)\n", $key, $res ) );
- }
-
- if ( $res == "DELETED" ) {
- return true;
- }
- return false;
- }
-
- // }}}
- // {{{ disconnect_all()
-
- /**
- * Disconnects all connected sockets
- */
- public function disconnect_all() {
- foreach ( $this->_cache_sock as $sock ) {
- fclose( $sock );
- }
-
- $this->_cache_sock = array();
- }
-
- // }}}
- // {{{ enable_compress()
-
- /**
- * Enable / Disable compression
- *
- * @param $enable Boolean: TRUE to enable, FALSE to disable
- */
- public function enable_compress( $enable ) {
- $this->_compress_enable = $enable;
- }
-
- // }}}
- // {{{ forget_dead_hosts()
-
- /**
- * Forget about all of the dead hosts
- */
- public function forget_dead_hosts() {
- $this->_host_dead = array();
- }
-
- // }}}
- // {{{ get()
-
- /**
- * Retrieves the value associated with the key from the memcache server
- *
- * @param $key Mixed: key to retrieve
- *
- * @return Mixed
- */
- public function get( $key ) {
- wfProfileIn( __METHOD__ );
-
- if ( $this->_debug ) {
- $this->_debugprint( "get($key)\n" );
- }
-
- if ( !$this->_active ) {
- wfProfileOut( __METHOD__ );
- return false;
- }
-
- $sock = $this->get_sock( $key );
-
- if ( !is_resource( $sock ) ) {
- wfProfileOut( __METHOD__ );
- return false;
- }
-
- if ( isset( $this->stats['get'] ) ) {
- $this->stats['get']++;
- } else {
- $this->stats['get'] = 1;
- }
-
- $cmd = "get $key\r\n";
- if ( !$this->_safe_fwrite( $sock, $cmd, strlen( $cmd ) ) ) {
- $this->_dead_sock( $sock );
- wfProfileOut( __METHOD__ );
- return false;
- }
-
- $val = array();
- $this->_load_items( $sock, $val );
-
- if ( $this->_debug ) {
- foreach ( $val as $k => $v ) {
- $this->_debugprint( sprintf( "MemCache: sock %s got %s\n", serialize( $sock ), $k ) );
- }
- }
-
- wfProfileOut( __METHOD__ );
- return @$val[$key];
- }
-
- // }}}
- // {{{ get_multi()
-
- /**
- * Get multiple keys from the server(s)
- *
- * @param $keys Array: keys to retrieve
- *
- * @return Array
- */
- public function get_multi( $keys ) {
- if ( !$this->_active ) {
- return false;
- }
-
- if ( isset( $this->stats['get_multi'] ) ) {
- $this->stats['get_multi']++;
- } else {
- $this->stats['get_multi'] = 1;
- }
- $sock_keys = array();
-
- foreach ( $keys as $key ) {
- $sock = $this->get_sock( $key );
- if ( !is_resource( $sock ) ) {
- continue;
- }
- $key = is_array( $key ) ? $key[1] : $key;
- if ( !isset( $sock_keys[$sock] ) ) {
- $sock_keys[$sock] = array();
- $socks[] = $sock;
- }
- $sock_keys[$sock][] = $key;
- }
-
- // Send out the requests
- foreach ( $socks as $sock ) {
- $cmd = 'get';
- foreach ( $sock_keys[$sock] as $key ) {
- $cmd .= ' ' . $key;
- }
- $cmd .= "\r\n";
-
- if ( $this->_safe_fwrite( $sock, $cmd, strlen( $cmd ) ) ) {
- $gather[] = $sock;
- } else {
- $this->_dead_sock( $sock );
- }
- }
-
- // Parse responses
- $val = array();
- foreach ( $gather as $sock ) {
- $this->_load_items( $sock, $val );
- }
-
- if ( $this->_debug ) {
- foreach ( $val as $k => $v ) {
- $this->_debugprint( sprintf( "MemCache: got %s\n", $k ) );
- }
- }
-
- return $val;
- }
-
- // }}}
- // {{{ incr()
-
- /**
- * Increments $key (optionally) by $amt
- *
- * @param $key String: key to increment
- * @param $amt Integer: (optional) amount to increment
- *
- * @return Integer: null if the key does not exist yet (this does NOT
- * create new mappings if the key does not exist). If the key does
- * exist, this returns the new value for that key.
- */
- public function incr( $key, $amt = 1 ) {
- return $this->_incrdecr( 'incr', $key, $amt );
- }
-
- // }}}
- // {{{ replace()
-
- /**
- * Overwrites an existing value for key; only works if key is already set
- *
- * @param $key String: key to set value as
- * @param $value Mixed: value to store
- * @param $exp Integer: (optional) Expiration time. This can be a number of seconds
- * to cache for (up to 30 days inclusive). Any timespans of 30 days + 1 second or
- * longer must be the timestamp of the time at which the mapping should expire. It
- * is safe to use timestamps in all cases, regardless of exipration
- * eg: strtotime("+3 hour")
- *
- * @return Boolean
- */
- public function replace( $key, $value, $exp = 0 ) {
- return $this->_set( 'replace', $key, $value, $exp );
- }
-
- // }}}
- // {{{ run_command()
-
- /**
- * Passes through $cmd to the memcache server connected by $sock; returns
- * output as an array (null array if no output)
- *
- * NOTE: due to a possible bug in how PHP reads while using fgets(), each
- * line may not be terminated by a \r\n. More specifically, my testing
- * has shown that, on FreeBSD at least, each line is terminated only
- * with a \n. This is with the PHP flag auto_detect_line_endings set
- * to falase (the default).
- *
- * @param $sock Ressource: socket to send command on
- * @param $cmd String: command to run
- *
- * @return Array: output array
- */
- public function run_command( $sock, $cmd ) {
- if ( !is_resource( $sock ) ) {
- return array();
- }
-
- if ( !$this->_safe_fwrite( $sock, $cmd, strlen( $cmd ) ) ) {
- return array();
- }
-
- while ( true ) {
- $res = fgets( $sock );
- $ret[] = $res;
- if ( preg_match( '/^END/', $res ) ) {
- break;
- }
- if ( strlen( $res ) == 0 ) {
- break;
- }
- }
- return $ret;
- }
-
- // }}}
- // {{{ set()
-
- /**
- * Unconditionally sets a key to a given value in the memcache. Returns true
- * if set successfully.
- *
- * @param $key String: key to set value as
- * @param $value Mixed: value to set
- * @param $exp Integer: (optional) Expiration time. This can be a number of seconds
- * to cache for (up to 30 days inclusive). Any timespans of 30 days + 1 second or
- * longer must be the timestamp of the time at which the mapping should expire. It
- * is safe to use timestamps in all cases, regardless of exipration
- * eg: strtotime("+3 hour")
- *
- * @return Boolean: TRUE on success
- */
- public function set( $key, $value, $exp = 0 ) {
- return $this->_set( 'set', $key, $value, $exp );
- }
-
- // }}}
- // {{{ set_compress_threshold()
-
- /**
- * Sets the compression threshold
- *
- * @param $thresh Integer: threshold to compress if larger than
- */
- public function set_compress_threshold( $thresh ) {
- $this->_compress_threshold = $thresh;
- }
-
- // }}}
- // {{{ set_debug()
-
- /**
- * Sets the debug flag
- *
- * @param $dbg Boolean: TRUE for debugging, FALSE otherwise
- *
- * @see MWMemcached::__construct
- */
- public function set_debug( $dbg ) {
- $this->_debug = $dbg;
- }
-
- // }}}
- // {{{ set_servers()
-
- /**
- * Sets the server list to distribute key gets and puts between
- *
- * @param $list Array of servers to connect to
- *
- * @see MWMemcached::__construct()
- */
- public function set_servers( $list ) {
- $this->_servers = $list;
- $this->_active = count( $list );
- $this->_buckets = null;
- $this->_bucketcount = 0;
-
- $this->_single_sock = null;
- if ( $this->_active == 1 ) {
- $this->_single_sock = $this->_servers[0];
- }
- }
-
- /**
- * Sets the timeout for new connections
- *
- * @param $seconds Integer: number of seconds
- * @param $microseconds Integer: number of microseconds
- */
- public function set_timeout( $seconds, $microseconds ) {
- $this->_timeout_seconds = $seconds;
- $this->_timeout_microseconds = $microseconds;
- }
-
- // }}}
- // }}}
- // {{{ private methods
- // {{{ _close_sock()
-
- /**
- * Close the specified socket
- *
- * @param $sock String: socket to close
- *
- * @access private
- */
- function _close_sock( $sock ) {
- $host = array_search( $sock, $this->_cache_sock );
- fclose( $this->_cache_sock[$host] );
- unset( $this->_cache_sock[$host] );
- }
-
- // }}}
- // {{{ _connect_sock()
-
- /**
- * Connects $sock to $host, timing out after $timeout
- *
- * @param $sock Integer: socket to connect
- * @param $host String: Host:IP to connect to
- *
- * @return boolean
- * @access private
- */
- function _connect_sock( &$sock, $host ) {
- list( $ip, $port ) = explode( ':', $host );
- $sock = false;
- $timeout = $this->_connect_timeout;
- $errno = $errstr = null;
- for( $i = 0; !$sock && $i < $this->_connect_attempts; $i++ ) {
- wfSuppressWarnings();
- if ( $this->_persistant == 1 ) {
- $sock = pfsockopen( $ip, $port, $errno, $errstr, $timeout );
- } else {
- $sock = fsockopen( $ip, $port, $errno, $errstr, $timeout );
- }
- wfRestoreWarnings();
- }
- if ( !$sock ) {
- if ( $this->_debug ) {
- $this->_debugprint( "Error connecting to $host: $errstr\n" );
- }
- return false;
- }
-
- // Initialise timeout
- stream_set_timeout( $sock, $this->_timeout_seconds, $this->_timeout_microseconds );
-
- return true;
- }
-
- // }}}
- // {{{ _dead_sock()
-
- /**
- * Marks a host as dead until 30-40 seconds in the future
- *
- * @param $sock String: socket to mark as dead
- *
- * @access private
- */
- function _dead_sock( $sock ) {
- $host = array_search( $sock, $this->_cache_sock );
- $this->_dead_host( $host );
- }
-
- function _dead_host( $host ) {
- $parts = explode( ':', $host );
- $ip = $parts[0];
- $this->_host_dead[$ip] = time() + 30 + intval( rand( 0, 10 ) );
- $this->_host_dead[$host] = $this->_host_dead[$ip];
- unset( $this->_cache_sock[$host] );
- }
-
- // }}}
- // {{{ get_sock()
-
- /**
- * get_sock
- *
- * @param $key String: key to retrieve value for;
- *
- * @return Mixed: resource on success, false on failure
- * @access private
- */
- function get_sock( $key ) {
- if ( !$this->_active ) {
- return false;
- }
-
- if ( $this->_single_sock !== null ) {
- $this->_flush_read_buffer( $this->_single_sock );
- return $this->sock_to_host( $this->_single_sock );
- }
-
- $hv = is_array( $key ) ? intval( $key[0] ) : $this->_hashfunc( $key );
-
- if ( $this->_buckets === null ) {
- foreach ( $this->_servers as $v ) {
- if ( is_array( $v ) ) {
- for( $i = 0; $i < $v[1]; $i++ ) {
- $bu[] = $v[0];
- }
- } else {
- $bu[] = $v;
- }
- }
- $this->_buckets = $bu;
- $this->_bucketcount = count( $bu );
- }
-
- $realkey = is_array( $key ) ? $key[1] : $key;
- for( $tries = 0; $tries < 20; $tries++ ) {
- $host = $this->_buckets[$hv % $this->_bucketcount];
- $sock = $this->sock_to_host( $host );
- if ( is_resource( $sock ) ) {
- $this->_flush_read_buffer( $sock );
- return $sock;
- }
- $hv = $this->_hashfunc( $hv . $realkey );
- }
-
- return false;
- }
-
- // }}}
- // {{{ _hashfunc()
-
- /**
- * Creates a hash integer based on the $key
- *
- * @param $key String: key to hash
- *
- * @return Integer: hash value
- * @access private
- */
- function _hashfunc( $key ) {
- # Hash function must on [0,0x7ffffff]
- # We take the first 31 bits of the MD5 hash, which unlike the hash
- # function used in a previous version of this client, works
- return hexdec( substr( md5( $key ), 0, 8 ) ) & 0x7fffffff;
- }
-
- // }}}
- // {{{ _incrdecr()
-
- /**
- * Perform increment/decriment on $key
- *
- * @param $cmd String: command to perform
- * @param $key String: key to perform it on
- * @param $amt Integer: amount to adjust
- *
- * @return Integer: new value of $key
- * @access private
- */
- function _incrdecr( $cmd, $key, $amt = 1 ) {
- if ( !$this->_active ) {
- return null;
- }
-
- $sock = $this->get_sock( $key );
- if ( !is_resource( $sock ) ) {
- return null;
- }
-
- $key = is_array( $key ) ? $key[1] : $key;
- if ( isset( $this->stats[$cmd] ) ) {
- $this->stats[$cmd]++;
- } else {
- $this->stats[$cmd] = 1;
- }
- if ( !$this->_safe_fwrite( $sock, "$cmd $key $amt\r\n" ) ) {
- return $this->_dead_sock( $sock );
- }
-
- $line = fgets( $sock );
- $match = array();
- if ( !preg_match( '/^(\d+)/', $line, $match ) ) {
- return null;
- }
- return $match[1];
- }
-
- // }}}
- // {{{ _load_items()
-
- /**
- * Load items into $ret from $sock
- *
- * @param $sock Ressource: socket to read from
- * @param $ret Array: returned values
- *
- * @access private
- */
- function _load_items( $sock, &$ret ) {
- while ( 1 ) {
- $decl = fgets( $sock );
- if ( $decl == "END\r\n" ) {
- return true;
- } elseif ( preg_match( '/^VALUE (\S+) (\d+) (\d+)\r\n$/', $decl, $match ) ) {
- list( $rkey, $flags, $len ) = array( $match[1], $match[2], $match[3] );
- $bneed = $len + 2;
- $offset = 0;
-
- while ( $bneed > 0 ) {
- $data = fread( $sock, $bneed );
- $n = strlen( $data );
- if ( $n == 0 ) {
- break;
- }
- $offset += $n;
- $bneed -= $n;
- if ( isset( $ret[$rkey] ) ) {
- $ret[$rkey] .= $data;
- } else {
- $ret[$rkey] = $data;
- }
- }
-
- if ( $offset != $len + 2 ) {
- // Something is borked!
- if ( $this->_debug ) {
- $this->_debugprint( sprintf( "Something is borked! key %s expecting %d got %d length\n", $rkey, $len + 2, $offset ) );
- }
-
- unset( $ret[$rkey] );
- $this->_close_sock( $sock );
- return false;
- }
-
- if ( $this->_have_zlib && $flags & self::COMPRESSED ) {
- $ret[$rkey] = gzuncompress( $ret[$rkey] );
- }
-
- $ret[$rkey] = rtrim( $ret[$rkey] );
-
- if ( $flags & self::SERIALIZED ) {
- $ret[$rkey] = unserialize( $ret[$rkey] );
- }
-
- } else {
- $this->_debugprint( "Error parsing memcached response\n" );
- return 0;
- }
- }
- }
-
- // }}}
- // {{{ _set()
-
- /**
- * Performs the requested storage operation to the memcache server
- *
- * @param $cmd String: command to perform
- * @param $key String: key to act on
- * @param $val Mixed: what we need to store
- * @param $exp Integer: (optional) Expiration time. This can be a number of seconds
- * to cache for (up to 30 days inclusive). Any timespans of 30 days + 1 second or
- * longer must be the timestamp of the time at which the mapping should expire. It
- * is safe to use timestamps in all cases, regardless of exipration
- * eg: strtotime("+3 hour")
- *
- * @return Boolean
- * @access private
- */
- function _set( $cmd, $key, $val, $exp ) {
- if ( !$this->_active ) {
- return false;
- }
-
- $sock = $this->get_sock( $key );
- if ( !is_resource( $sock ) ) {
- return false;
- }
-
- if ( isset( $this->stats[$cmd] ) ) {
- $this->stats[$cmd]++;
- } else {
- $this->stats[$cmd] = 1;
- }
-
- $flags = 0;
-
- if ( !is_scalar( $val ) ) {
- $val = serialize( $val );
- $flags |= self::SERIALIZED;
- if ( $this->_debug ) {
- $this->_debugprint( sprintf( "client: serializing data as it is not scalar\n" ) );
- }
- }
-
- $len = strlen( $val );
-
- if ( $this->_have_zlib && $this->_compress_enable &&
- $this->_compress_threshold && $len >= $this->_compress_threshold )
- {
- $c_val = gzcompress( $val, 9 );
- $c_len = strlen( $c_val );
-
- if ( $c_len < $len * ( 1 - self::COMPRESSION_SAVINGS ) ) {
- if ( $this->_debug ) {
- $this->_debugprint( sprintf( "client: compressing data; was %d bytes is now %d bytes\n", $len, $c_len ) );
- }
- $val = $c_val;
- $len = $c_len;
- $flags |= self::COMPRESSED;
- }
- }
- if ( !$this->_safe_fwrite( $sock, "$cmd $key $flags $exp $len\r\n$val\r\n" ) ) {
- return $this->_dead_sock( $sock );
- }
-
- $line = trim( fgets( $sock ) );
-
- if ( $this->_debug ) {
- $this->_debugprint( sprintf( "%s %s (%s)\n", $cmd, $key, $line ) );
- }
- if ( $line == "STORED" ) {
- return true;
- }
- return false;
- }
-
- // }}}
- // {{{ sock_to_host()
-
- /**
- * Returns the socket for the host
- *
- * @param $host String: Host:IP to get socket for
- *
- * @return Mixed: IO Stream or false
- * @access private
- */
- function sock_to_host( $host ) {
- if ( isset( $this->_cache_sock[$host] ) ) {
- return $this->_cache_sock[$host];
- }
-
- $sock = null;
- $now = time();
- list( $ip, /* $port */) = explode( ':', $host );
- if ( isset( $this->_host_dead[$host] ) && $this->_host_dead[$host] > $now ||
- isset( $this->_host_dead[$ip] ) && $this->_host_dead[$ip] > $now
- ) {
- return null;
- }
-
- if ( !$this->_connect_sock( $sock, $host ) ) {
- return $this->_dead_host( $host );
- }
-
- // Do not buffer writes
- stream_set_write_buffer( $sock, 0 );
-
- $this->_cache_sock[$host] = $sock;
-
- return $this->_cache_sock[$host];
- }
-
- function _debugprint( $str ) {
- print( $str );
- }
-
- /**
- * Write to a stream, timing out after the correct amount of time
- *
- * @return Boolean: false on failure, true on success
- */
- /*
- function _safe_fwrite( $f, $buf, $len = false ) {
- stream_set_blocking( $f, 0 );
-
- if ( $len === false ) {
- wfDebug( "Writing " . strlen( $buf ) . " bytes\n" );
- $bytesWritten = fwrite( $f, $buf );
- } else {
- wfDebug( "Writing $len bytes\n" );
- $bytesWritten = fwrite( $f, $buf, $len );
- }
- $n = stream_select( $r = null, $w = array( $f ), $e = null, 10, 0 );
- # $this->_timeout_seconds, $this->_timeout_microseconds );
-
- wfDebug( "stream_select returned $n\n" );
- stream_set_blocking( $f, 1 );
- return $n == 1;
- return $bytesWritten;
- }*/
-
- /**
- * Original behaviour
- */
- function _safe_fwrite( $f, $buf, $len = false ) {
- if ( $len === false ) {
- $bytesWritten = fwrite( $f, $buf );
- } else {
- $bytesWritten = fwrite( $f, $buf, $len );
- }
- return $bytesWritten;
- }
-
- /**
- * Flush the read buffer of a stream
- */
- function _flush_read_buffer( $f ) {
- if ( !is_resource( $f ) ) {
- return;
- }
- $n = stream_select( $r = array( $f ), $w = null, $e = null, 0, 0 );
- while ( $n == 1 && !feof( $f ) ) {
- fread( $f, 1024 );
- $n = stream_select( $r = array( $f ), $w = null, $e = null, 0, 0 );
- }
- }
-
- // }}}
- // }}}
- // }}}
-}
-
-// vim: sts=3 sw=3 et
-
-// }}}
-
-class MemCachedClientforWiki extends MWMemcached {
- function _debugprint( $text ) {
- wfDebug( "memcached: $text" );
- }
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff