<?php
// error_reporting(0);
$time_start = getmicrotime();
session_start();
$key = $_GET['key'];
$time = $_GET['time'];
$files = array('csdn.sql');
$keyminlen = 4;
$step = 16000;
$limit = 1024000;
$lend = "\n";
$path = './temp/';
$data = './data/';
if($_GET['action']=='clear'){
unlink($path.$_SESSION['sid']);
$_SESSION['sid'] = '';
}
$sid = $_SESSION['sid'];
if($sid==''){
$sid = session_id();
$_SESSION['sid'] = $sid;
}
function getmicrotime(){
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
function cache($file,$str){
global $sid,$path,$limit,$key,$time;
$ssize = filesize($path.$sid);
if($ssize>$limit){
echo "<a href=temp/$sid> result right click to save as</a><br>";
echo "<br><br><a href=?action=clear>get another keyword</a><br><br>processed in $time seconds";
die('too many result, contact us if you do need it');
}
if(preg_match_all("/(.*?)".$key."(.*?)\\n/i",$str,$match)){
if($ssize>0) file_put_contents($path.$sid,$match[0],FILE_APPEND);
else file_put_contents($path.$sid,$file."\n".$match[0],FILE_APPEND);
}
print_r(preg_last_error());
}
function large($file,$start,$repeat,$plus){
global $step,$data,$key;
$r = array();
$return = $temp = '';
$i = 0;
$handle = fopen($data.$file,'r');
while($i<$repeat && !feof($handle)){
fseek($handle, $start, SEEK_SET);
if($i==0) $temp = $plus.fread($handle,$step);
else $temp = fread($handle,$step);
if(strpos($temp,$key)){
$r[1].= $temp;
$r[2] = true;
$r[3] = substr($temp,-60);
}
$r[0]+= $step;
$start+= $step;
$i++;
}
fclose($handle);
return $r;
}
function process($file,$start,$lnum){
global $step,$lend,$fid,$time,$time_start,$key,$data;
$r = array();
$filesize = filesize($data.$file);
$block = 51200000;
$repeat = 10;
$tstr = '';
$count = 0;
while($count<$block && $start<$filesize){
$temp = large($file,$start,$repeat,$temp[3]);
$start+=$temp[0];
$count+=$temp[0];
if($temp[2]) cache($file,$temp[1]);
}
$time+=getmicrotime()-$time_start;
echo "<br><br>processed in $time seconds<br> continue<br ><br>";
if($start>=$filesize){
$fid++;
die($file.' KO.<br>continue to another<br><meta http-equiv="Refresh" content="0;url=?key='.rawurlencode($key).'&time='.$time.'&fid='.$fid.'">');
}
$r[] = $start;
$r[] = $lnum;
return $r;
}
$start = $_GET['start'];
$lnum = $_GET['lnum'];
$fid = $_GET['fid'];
if($fid<1) $fid = 0;
if($fid>count($files)-1){
if(filesize($path.$sid)>0){
echo "<a href=temp/$sid> result right click to save as</a><br>";
echo '<pre>'.file_get_contents($path.$sid).'</pre>';
}
else echo 'no result';
echo "<br><br><a href=?action=clear>get another keyword</a><br><br>processed in $time seconds";
die();
}
$file = $files[$fid];
if($key=='') die('<form>keyword: <input type=text name=key> <input type=submit></form>');
else{
if(strlen($key)<$keyminlen) die('keyword too short');
if($start<1) $start = 0;
if($lnum<2) $lnum = 1;
$t = process($file,$start,$lnum);
$time+=getmicrotime()-$time_start;
echo '<meta http-equiv="Refresh" content="0;url=?key='.rawurlencode($key).'&fid='.$fid.'&time='.$time.'&start='.$t[0].'&lnum='.$t[1].'&file='.$file.'">';
}
?>
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