एक फ़ाइल प्रबंधक की कहानी

// ,     PHP   ,  htmlspecialchars,      .. $dh = opendir($dir); while ($f = readdir($dh)) { if ($f == '.' || $f == '..') continue; $fullpath = $dir . '/' . $f; $is_dir = is_dir($fullpath); ?><tr><td><input type="checkbox" name="files[]" value="<?=$f?>" /></td><td><img src="..." /></td><td><a href="..."><?=$f?></a></td></tr><? } 

 <?php function d_filelist_fast($dir) { setreadable($dir,true); if(!(@$dh=opendir($dir)) && !(@$ftp_list=d_ftplist($dir))) return false; if($dh) { $dirs = $files = $fsizes = array(); /* chdir($dir); */ while(false!==(@$file=readdir($dh))) { if($file=='.' || $file=='..') continue; if(is_dir($dir.'/'.$file)) $dirs[]=$dir.'/'.$file; else $files[]=$dir.'/'.$file; $fsizes[$dir.'/'.$file] = filesize($dir.'/'.$file); } closedir($dh); }else return $ftp_list; return array('dirs'=>$dirs,'files'=>$files,'fsizes'=>$fsizes); } 

488 एमएस पीढ़ी
33.51 एमबी मेमोरी
246 KB इन gzip (+ 500 ms प्रति डाउनलोड)
ब्राउज़र में 305 मि
= 1300 मि

+ कोई डेटा डाउनलोड (सामान्य रूप से)
- सबसे धीमा विकल्प
- मेमोरी की बहुत आवश्यकता होती है

 /* extremely complicated :), extremely fast (on huge directories) and extremely customizable sorted filelist :) $dir -- directory from which to get filelist $params -- array with optional parameters (see beginning of function for details) RETURN: array( 'pages' => array( $pagemin => array( 'files' => array('field1' => $list1, ..., 'fieldN' => $listN), 'dirs' => ... (array of the same format) ), ... (the intermediate pages) $pagemax => array( 'files' => ..., 'dirs' => ... ) ), 'pages_num' => ..., 'items_num' => ... ) where field1, ..., fieldN -- requested fields (default 'name' and 'size') $list1, ..., $listN -- a list of values (array('value1', 'value2', ...,'valueN')), $pagemin and $pagemax -- the page numbers of the specified range (default 1) pages_num -- filtered number of pages (returns 1 if you do not ask not to split to pages) items_num -- filtered number of files + total number of folders EXAMPLE: $res = d_filelist_exteme('/home/yourock'); print_r($res); this will result in: Array ( [pages] => Array ( [1] => Array ( [files] => Array ( [name] => Array ( [0] => file1 [1] => file3 [2] => file20 ) [size] => Array ( [0] => 1000 [1] => 2000 [2] => 300000 ) ) [dirs] => Array ( [name] => Array ( [0] => dir1 ) [size] => Array ( [0] => 512 ) ) ) ) [pages_num] => 1 [items_num] => 4 ) */ /* TODO: move it to config.php in some time */ define('LIGHT_PERPAGE', 30); function d_filelist_extreme($dir, $params=array()) { /* set defaults: $key = ''; is equal to default value for $params['key'] */ $fields = array('name', 'size'); // name, chmod or any field of stat(): (size, mtime, uid, gid, ...) $filt=''; // filename filter $sort='name'; // what field to sort (see $fields) $order='asc'; // sorting order: "asc" (ascending) or "desc" (descending) $fast=true; // use some optimizations (eg can allow to get some range from a filelist of 5000 files in 0.1 sec) $maxit=defined('JS_MAX_ITEMS') ? JS_MAX_ITEMS : 200; // how many items is enough to enable optimization? $split=true; // split result to pages and return only results for pages from $pagemin to $pagemax (including both) $pagemin=1; $pagemax=1; // see description for $split $perpage=LIGHT_PERPAGE; // how many files per page $ftp=true; // try to get filelist through FTP also (can affect performance) /* read parameters, overwriting default values */ extract($params,EXTR_OVERWRITE); if($sort!='name') { /*return d_error('Not supported yet');*/ $fast = false; if(array_search('mode', $fields) === false) $fields[] = 'mode'; } if($pagemax < $pagemin) $pagemax = $pagemin; if(array_search($sort, $fields)===false) $fields[] = $sort; if($order != 'asc') $order = 'desc'; $filt = strtolower($filt); /* check required fields */ $st = stat(__FILE__); foreach($fields as $k=>$v) { if($v == 'name' || $v=='chmod') continue; if(!isset($st[$v])) { $keys = array_filter(array_keys($st), 'is_string'); return d_error('Unknown field: '.$v.'. Use the following: name, chmod, '.implode(', ', $keys)); } } setreadable($dir, true); if(!@$dh = opendir($dir)) { if(!$ftp) return d_error('Directory not readable'); if(!@$ftp_list=d_ftplist($dir)) return d_error('Directory not readable'); } if($dh) { $it = array(); /* items */ if(!$filt) { while(false!==(@$f=readdir($dh))) { if($f=='.' || $f=='..') continue; $it[] = $f; } }else { while(false!==(@$f=readdir($dh))) { if($f=='.' || $f=='..') continue; if(strpos(strtolower($f),$filt)!==false) $it[] = $f; } } closedir($dh); if(!$split) $perpage = sizeof($it); $old_dir = getcwd(); chdir($dir); $l = sizeof($it); if($l < $maxit) $fast = false; /* $fast means do not sort "folders first" */ if($fast) /* $sort = 'name' and $split = true */ { if($order=='asc') sort($it); else rsort($it); }else { $dirs = $files = array(); if($sort=='name') { for($i = 0; $i < $l; $i++) { if(is_dir($it[$i])) $dirs[] = $it[$i]; else $files[] = $it[$i]; } if($order=='asc') { sort($dirs); sort($files); $it = array_merge($dirs, $files); }else { rsort($files); rsort($dirs); $it = array_merge($files, $dirs); } } } /* array_display($it); */ $res = array('pages_num' => ceil($l / $perpage), 'items_num' => $l); $all = $pages = array(); /* fix invalid page range, if it is required */ if($pagemin > $res['pages_num']) { $pagemin = //max(1, $pagemin + ($pagemax - $res['pages_num']) ); $pagemax = $res['pages_num']; } $cd = $cf = $ci = ''; /* Code for Directories, Code for Files and Code for Items */ foreach($fields as $v) { $t = '[\''.$v.'\'][] = '; if ($v == 'name') $t .= '$n'; else if ($v == 'chmod') $t .= 'decoct($s[\'mode\'] & 0777)'; else $t .= '$s[\''.$v.'\']'; if($sort == 'name') { $cd .= '$pages[$page][\'dirs\']'.$t.";\n"; $cf .= '$pages[$page][\'files\']'.$t.";\n"; }else { $ci .= '$all'.$t.";\n"; } } /* we cannot optimize sorting, if sorted field is not name: we will have to call expensive stat() for every file, not only $perpage files. */ if($sort == 'name') { eval(' for($i = 0; $i < '.$l.'; $i++) { $page = floor($i / '.$perpage.') + 1; if( $page < '.$pagemin.' || $page > '.$pagemax.' ) continue; $n = $it[$i]; $s = stat($n); // is a directory? if(($s[\'mode\'] & 0x4000) == 0x4000) { '.$cd.' }else { '.$cf.' } } '); } if($sort!='name') { eval(' for($i = 0; $i < '.$l.'; $i++) { $n = $it[$i]; $s = stat($n); '.$ci.' } '); $code = 'array_multisort($all[\''.$sort.'\'], SORT_NUMERIC, SORT_'.strtoupper($order); foreach($fields as $v) { if($v != $sort) $code .= ', $all[\''.$v.'\']'; } $code .= ');'; /* code is evalled to prevent games with links to arrays */ eval($code); $pages = array(); $cf = $cd = ''; foreach($fields as $k => $v) { $cf .= '$pages[$page][\'files\'][\''.$v.'\'][] = $all[\''.$v.'\'][$i];'; $cd .= '$pages[$page][\'dirs\'][\''.$v.'\'][] = $all[\''.$v.'\'][$i];'; } eval(' for($i = 0; $i < $l; $i++) { $page = floor($i / '.$perpage.') + 1; if( $page < '.$pagemin.' || $page > '.$pagemax.' ) continue; if(($all[\'mode\'][$i] & 0x4000) == 0x4000) { '.$cd.' }else { '.$cf.' } } '); } if($res) $res['pages'] = $pages; chdir($old_dir); return $res; }else { extract($ftp_list); if($fields !== array('name', 'size') || $sort!='name') return d_error('Custom fields and sorting not by name are not currently supported in FTP mode'); $files = array_map('basename', $files); $dirs = array_map('basename', $dirs); $fl = sizeof($files); $dl = sizeof($dirs); if($filt) { $files_c = $dirs_c = array(); for($i=0; $i<$fl; $i++) if(strpos(strtolower($files[$i]),$filt)!==false) $files_c[]=$files[$i]; for($i=0; $i<$dl; $i++) if(strpos(strtolower($dirs[$i]),$filt)!==false) $dirs_c[]=$dirs[$i]; $dirs = $dirs_c; $files = $files_c; $fl = sizeof($files); $dl = sizeof($dirs); } if(!$split) $perpage = $fl + $dl; $pages = array(); for($i=0,$arr='files'; $arr=='files'||$i<$dl; $i++) { if($arr=='files' && $i>=$fl) { $arr='dirs'; $i=0; } $page = floor($i / $perpage) + 1; if( $page < $pagemin || $page > $pagemax ) continue; $pages[$page][$arr]['name'][] = ${$arr}[$i]; $pages[$page][$arr]['size'][] = @$fsizes[$dir.'/'.${$arr}[$i]]; } return array('items_num' => ($fl+$dl), 'pages_num' => ceil(($fl+$dl) / $perpage), 'pages' => $pages); } } 

169 एमएस पीढ़ी
13.48 एमबी मेमोरी
2 kb से gzip तक
ब्राउज़र में 7 एमएस प्रति अनुरोध
= 200 मि

+ त्वरित शुरुआत
- मेमोरी की बहुत आवश्यकता होती है
- लंबी और संसाधन-गहन डेटा लोडिंग: फ़ोल्डर को फिर से स्कैन करना

 /* the cached version of filelist especially made for JS GGGR returns: array( 'items' => array( start: array( 'name' => ..., 'size' => ..., 'is_dir' => true|false, ), ... start+length-1: array( 'name' => ..., 'size' => ..., 'is_dir' => true|false, ), ), 'cnt' => N ) */ function d_filelist_cached($dir, $start, $length, $filter = '') { //sleep(1); $tmpdir = is_callable('get_tmp_dir') ? get_tmp_dir() : '/tmp'; $cache_prefix = $tmpdir.'/dolphin'.md5(__FILE__); $cache_dat = $cache_prefix.'.dat'; $cache_idx = $cache_prefix.'.idx'; $new = false; if(!file_exists($cache_dat) || filemtime($dir) > filemtime($cache_dat)) { $new = true; $fp = fopen($cache_dat, 'w+b'); $ifp = fopen($cache_idx, 'w+b'); }else { $fp = fopen($cache_dat, 'r+b'); $ifp = fopen($cache_idx, 'r+b'); list(, $l) = unpack('n', fread($fp, 2)); $cached_dir = fread($fp, $l); list(, $l) = unpack('n', fread($fp, 2)); $cached_filter = fread($fp, $l); if($cached_dir != $dir || $cached_filter != $filter) { ftruncate($fp, 0); ftruncate($ifp, 0); fseek($fp, 0, SEEK_SET); fseek($ifp, 0, SEEK_SET); $new = true; } } $items = array(); $cnt = 0; $old_cwd = getcwd(); try { if(!@chdir($dir)) throw new Exception('Could not chdir to the folder'); if($new) { fwrite($fp, pack('n', strlen($dir)).$dir); fwrite($fp, pack('n', strlen($filter)).$filter); $pos = ftell($fp); $dh = opendir('.'); if(!$dh) throw new Exception('Could not open directory for reading'); $filter = strtolower($filter); while( false !== ($f = readdir($dh)) ) { if($f == '.' || $f == '..') continue; if(strlen($filter) && !substr_count(strtolower($f), $filter)) continue; fwrite($ifp, pack('NN', $pos, strlen($f))); fwrite($fp, $f); $pos += strlen($f); // ftell is not as fast as it should be, sadly } fflush($ifp); fflush($fp); } fseek($ifp, $start * 8 /* length(pack('NN')) */); $first = true; $curr_idx = $start; while( $curr_idx < $start + $length ) { list(, $pos, $l) = unpack('N2', fread($ifp, 8)); if($first) { fseek($fp, $pos); $first = false; } $f = fread($fp, $l); if(!strlen($f)) break; if(strlen($f) != $l) { throw new Exception('Consistency error'); } $items[$curr_idx++] = array( 'name' => $f, 'size' => filesize($f), 'is_dir' => is_dir($f), ); } $cnt = filesize($cache_idx) / 8; }catch(Exception $e) { fclose($fp); fclose($ifp); unlink($cache_dat); unlink($cache_idx); @chdir($old_cwd); return is_callable('d_error') ? d_error($e->getMessage()) : false; } if($cnt < 500 && $length >= 500) { usort($items, 'd_filelist_cached_usort_cmp'); } @chdir($old_cwd); return array( 'items' => $items, 'cnt' => $cnt ); } function d_filelist_cached_usort_cmp($it1, $it2) { return strcmp( $it1['name'], $it2['name'] ); } 

460 एमएस पीढ़ी
1.18 एमबी मेमोरी
2 kb से gzip तक
ब्राउज़र में 8 एमएस प्रति अनुरोध
= 500 मि

+ आसान और तेजी से लोड हो रहा है
+ बहुत मेमोरी की आवश्यकता नहीं है
- धीमी शुरुआत
- महत्वपूर्ण आकार की मध्यवर्ती फ़ाइलों का संग्रहण (1.6 एमबी की डायरेक्टरी फ़ाइल आकार वाली 800 केबी 50,000 फाइलें)