452 lines
17 KiB
PHP
Executable file
452 lines
17 KiB
PHP
Executable file
#!/usr/bin/php
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<?php
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/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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define('N',"\n");
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define('SNAME',basename(__FILE__));
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define('BNAME',preg_replace('/\.[^.]*$/','',SNAME));
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require(__DIR__.'/../site/mustard/include/gurl.php');
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require(__DIR__.'/../site/mustard/include/ghs.php');
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require(__DIR__.'/../site/mustard/include/ght.php');
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require(__DIR__.'/../site/mustard/include/gracetime.php');
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require(__DIR__.'/../site/mustard/include/parsetime.php');
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use function mysqli_real_escape_string as myesc;
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$opts=[
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'inifp'=>__DIR__.'/../conf/mustard.ini',
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'startinst'=>'mastodon.social',
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'gracetime'=>$gracetime,
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'peersfp'=>__DIR__.'/peers',
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'cpeersfp'=>__DIR__.'/peers.checked',
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'excludefp'=>null,
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'timeout'=>8,
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'curltimeout'=>15,
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'loop'=>false,
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'excludedead'=>false,
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'ignorelock'=>false,
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'minmsgimplev'=>1
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];
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$msgimplevs=['Debug', 'Info', 'Warning', 'Error'];
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foreach ($msgimplevs as $val) $imsgimplevs[]=lcfirst($val);
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$imsgimplevs[]='none';
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$ghtsa=[[' day',' days'],[' hour',' hours'],[' minute',' minutes'],[' second',' seconds']];
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$help='SYNOPSIS
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'.SNAME.' [options]
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DESCRIPTION
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This program tries to build a fairly complete list of fediverse instances
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exposing the [instance]/api/v1/instance/peers endpoint.
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OPTIONS
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-s, --startinst <domain>
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Defines the first instance to crawl.
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DEFAULT: «'.$opts['startinst'].'»
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-e, --excludefp <file>
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Defines a file containing exclusion rules: one regular expression per
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line (empty lines are ignored). Any instance matching any defined regex
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will be ignored by the program. Changes made to this file during program
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execution will be taken into account.
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-g, --gracetime <time>
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If an instance has not been responding for longer than this time, consider
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it dead. See section «TIME SPECIFICATION» below to see how to specify time.
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DEFAULT: '.ght($opts['gracetime'],$ghtsa).'
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-E, --excludedead
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Exclude instances marked considered dead (see previous option).
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-p, --peersfp <file>
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Defines the file into which the ordered list of responding instances
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will be saved.
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DEFAULT: «'.$opts['peersfp'].'»
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-c, --cpeersfp <file>
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Defines the file into which the ordered list of all checked instances will
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be saved.
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DEFAULT: «'.$opts['cpeersfp'].'»
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-I, --ignorelock
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Normally, if its lockfile exists, the program exits with an error before
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doing anything. With this option the lockfile is ignored. Please verify
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that the program is not already running before using it.
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-t, --timeout <time>
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Defines the timeout in seconds for every connection attempt. See section
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«TIME SPECIFICATION» below to see how to specify time.
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DEFAULT: '.ght($opts['timeout'],$ghtsa).'
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-T, --curltimeout <time>
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Defines the timeout in seconds for every download. See section «TIME
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SPECIFICATION» below to see how to specify time.
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DEFAULT: '.ght($opts['curltimeout'],$ghtsa).'
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-m, --minmsgimplev <«debug»|«info»|«warning»|«error»|«none»>
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Defines the minimum “importance level” of messages to be written to the text
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user interface. There are 4 “importance levels”, in this order of
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importance: «debug», «info», «warning», «error». Setting this option to any
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of these values will write to the text user interface all the messages with
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the specified or a greater level; setting it to the special value «none»
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will completely disable message writing.
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DEFAULT: '.$imsgimplevs[$opts['minmsgimplev']].'
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-h, --help
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Show this help text and exit.
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TIME SPECIFICATION
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An example is better than ~5148 words :-)
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To specify 1 year, 6 months (made of 31 days), 2 weeks, 3 days, 5 hours,
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7 minutes and 12 seconds you can use «1y,6M,2w,3d,5h,7m,12s»; but you can
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also use «12s,7m,5h,3d,2w,6M,1y», or even «18M,1w,1w,2d,1d,3h,2h,7m,12s».
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This program comes with ABSOLUTELY NO WARRANTY; for details see the source.
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This is free software, and you are welcome to redistribute it under certain
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conditions; see <http://www.gnu.org/licenses/> for details.'.N;
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for ($i=1; $i<$argc; $i++) {
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if ($argv[$i]=='-s' || $argv[$i]=='--startinst') {
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if ($i+1>=$argc)
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mexit(3,'option «'.$argv[$i].'» has to be followed by a domain name (use «-h» for more info).'.N,1,false);
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$i++;
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$opts['startinst']=$argv[$i];
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} elseif ($argv[$i]=='-g' || $argv[$i]=='--gracetime') {
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if ($i+1>=$argc || ($time=parsetime($argv[$i+1]))===false)
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mexit(3,'option «'.$argv[$i].'» requires a valid time specification as an argument (use «-h» to read help).'.N,1,false);
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$i++;
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$opts['gracetime']=$time;
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} elseif ($argv[$i]=='-p' || $argv[$i]=='--peersfp') {
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if ($i+1>=$argc)
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mexit(3,'option «'.$argv[$i].'» has to be followed by a file’s path (use «-h» for more info).'.N,1,false);
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$i++;
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$opts['peersfp']=$argv[$i];
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} elseif ($argv[$i]=='-c' || $argv[$i]=='--cpeersfp') {
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if ($i+1>=$argc)
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mexit(3,'option «'.$argv[$i].'» has to be followed by a file’s path (use «-h» for more info).'.N,1,false);
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$i++;
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$opts['cpeersfp']=$argv[$i];
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} elseif ($argv[$i]=='-I' || $argv[$i]=='--ignorelock') {
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$opts['ignorelock']=true;
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} elseif ($argv[$i]=='-e' || $argv[$i]=='--excludefp') {
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if ($i+1>=$argc)
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mexit(3,'option «'.$argv[$i].'» has to be followed by a file’s path (use «-h» for more info).'.N,1,false);
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$i++;
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$opts['excludefp']=$argv[$i];
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} elseif ($argv[$i]=='-t' || $argv[$i]=='--timeout') {
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if ($i+1>=$argc || ($time=parsetime($argv[$i+1]))===false)
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mexit(3,'option «'.$argv[$i].'» requires a valid time specification as an argument (use «-h» to read help).'.N,1,false);
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$i++;
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$opts['timeout']=$time;
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} elseif ($argv[$i]=='-T' || $argv[$i]=='--curltimeout') {
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if ($i+1>=$argc || ($time=parsetime($argv[$i+1]))===false)
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mexit(3,'option «'.$argv[$i].'» requires a valid time specification as an argument (use «-h» to read help).'.N,1,false);
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$i++;
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$opts['curltimeout']=$time;
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} elseif ($argv[$i]=='-E' || $argv[$i]=='--excludedead') {
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$opts['excludedead']=true;
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} elseif ($argv[$i]=='-m' || $argv[$i]=='--minmsgimplev') {
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if ($i+1>=$argc || !in_array(strtolower($argv[$i+1]),$imsgimplevs))
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mexit(3,'option «'.$argv[$i].'» requires a valid “message importance level” value as an argument (use «-h» to read help).'.N,1,false);
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$i++;
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$opts['minmsgimplev']=array_search(strtolower($argv[$i]),$imsgimplevs);
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} elseif ($argv[$i]=='-h' || $argv[$i]=='--help') {
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echo($help);
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exit(0);
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} else {
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mexit(3,'don’t know how to interpret «'.$argv[$i].'» (use «-h» to read the help text).'.N,1,false);
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}
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}
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$lockfp=__DIR__.'/'.BNAME.'.lock';
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if (is_file($lockfp) && !$opts['ignorelock']) mexit(3,'lockfile exists: it seems the program is already running; if you’re sure it’s not, you can use «-I» to force execution.'.N,1,false);
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if (@touch($lockfp)===false) mexit(3,'could not create lockfile «'.$lockfp.'».'.N,1,false);
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//declare(ticks=1);
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pcntl_async_signals(true);
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pcntl_signal(SIGTERM,'sighandler');// Termination ('kill' was called)
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pcntl_signal(SIGHUP,'sighandler');// Terminal log-out
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pcntl_signal(SIGINT,'sighandler');// Interrupted (Ctrl-C is pressed)
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$iniarr=@parse_ini_file($opts['inifp']);
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if ($iniarr===false) mexit(3,'couldn’t open «'.$opts['inifp'].'».'.N,1,true);
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try { $link=@mysqli_connect($iniarr['db_host'],$iniarr['db_admin_name'],$iniarr['db_admin_password'],$iniarr['db_name'],$iniarr['db_port'],$iniarr['db_socket']); }
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catch (Exception $error) { mexit(3,'couldn’t connect to MySQL server: '.mysqli_connect_error().'.'.N,1,true); }
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// for php versions < 8
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if ($link===false) mexit(3,'couldn’t connect to MySQL server: '.mysqli_connect_error().'.'.N,1,true);
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try { $res=mysqli_set_charset($link,'utf8mb4'); }
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catch (Exception $error) { mexit(3,'couldn’t set «utf8mb4» charset for MySQL: '.mysqli_error($link).' ('.mysqli_errno($link).'.'.N,1,true); }
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// for php versions < 8
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if ($res===false) mexit(3,'couldn’t set «utf8mb4» charset for MySQL: '.mysqli_error($link).' ('.mysqli_errno($link).').'.N,1,true);
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$deadinsts=[];
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if ($opts['excludedead']) {
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$graceline=time()-$opts['gracetime'];
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$res=myq($link,'SELECT URI FROM Instances WHERE LastOkCheckTS<'.$graceline.' OR (LastOkCheckTS IS NULL AND InsertTS<'.$graceline.')');
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lecho(0,'got '.mysqli_num_rows($res).' dead instances from Instances table.'.N);
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while ($row=mysqli_fetch_assoc($res))
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if (!in_array($row['URI'],$deadinsts))
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$deadinsts[]=$row['URI'];
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$res=myq($link,'SELECT Hostname FROM Peers WHERE LastOkCheckTS<'.$graceline.' OR (LastOkCheckTS IS NULL AND FirstCheckTS<'.$graceline.')');
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lecho(0,'got '.mysqli_num_rows($res).' dead instances from Peers table.'.N);
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while ($row=mysqli_fetch_assoc($res))
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if (!in_array($row['Hostname'],$deadinsts))
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$deadinsts[]=$row['URI'];
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unset($res,$row);
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lecho(1,'loaded list of dead instances ('.count($deadinsts).').'.N);
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}
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$insts=[];
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$cinsts=[];
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$exarr=[];
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$notifs=[];
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$maxround=1;
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$newc=0;
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$tini=time();
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// go
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crawl([$opts['startinst']],1);
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lecho(1,'done crawling! :-)'.N);
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$now=time();
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lecho(1,'crawl started on '.date('Y-m-d H:i:s',$tini).' and ended on '.date('Y-m-d H:i:s',$now).'; took '.ght($now-$tini).' in '.$maxround.' rounds; '.count($insts).' instance(s) responded; '.$newc.' new instances where found; max. memory usage: '.ghs(memory_get_peak_usage(true)).'.'.N);
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sortcheckandsave($insts,'list of responding instances',$opts['peersfp']);
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sortcheckandsave($cinsts,'list of checked instances',$opts['cpeersfp']);
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mysqli_close($link);
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unlink($lockfp);
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lecho(1,'done :-)'.N);
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exit(0);
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// functions
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function crawl($list,$id) {
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global $insts, $deadinsts, $cinsts, $tini, $opts, $maxround, $newc, $link;
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lecho(1,'###### START OF ROUND '.$id.' ######'.N);
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$nlist=[];
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$c=count($list);
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$i=0;
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$rtini=time();
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foreach ($list as $inst) {
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$i++;
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$now=time();
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$rtela=$now-$rtini;
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lecho(1,'working on «'.$inst.'»: round '.$id.', '.$i.'/'.$c.'; TET: '.ght($now-$tini,null,0).'; ETR of this round: '.ght($rtela/$i*$c-$rtela,null,0).'; using '.ghs(memory_get_usage(true)).' mem. (peak: '.ghs(memory_get_peak_usage(true)).'); '.count($insts).' discovered instances; '.count($nlist).' instances in next round list; '.$newc.' new instance(s) found.'.N);
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waituntilonline();
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updexarr();
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lecho(0,'trying to load «'.$inst.'»’s peers...'.N);
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$peers=gurl('https://'.$inst.'/api/v1/instance/peers',$opts['timeout'],$opts['curltimeout']);
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$cinsts[]=$inst;// don't need to check if in_array
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$responded=0;
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if ($peers['cont']===false) {
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lecho(2,'could not load «'.$inst.'»’s peers: '.$peers['emsg'].'.'.N);
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} else {
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$peers=@json_decode($peers['cont'],true);
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if (!is_array($peers)) {
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lecho(2,'loading «'.$inst.'»’s peers, got not good JSON.'.N);
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} else {
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$cp=count($peers);
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lecho(1,'successfully loaded «'.$inst.'»’s peers ('.$cp.') :-)'.N);
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$responded=1;
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if (!in_array($inst,$insts)) {
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lecho(1,'instance «'.$inst.'» responded :-)'.N);
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$insts[]=$inst;
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$res=myq($link,'SELECT ID FROM Instances WHERE URI=\''.myesc($link,$inst).'\'');
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if (mysqli_num_rows($res)==0) {
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lecho(1,'instance «'.$inst.'» is new :-)'.N);
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myq($link,'INSERT INTO Instances SET URI=\''.myesc($link,$inst).'\', InsertTS='.time());
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$newc++;
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}
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}
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$cp--;
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$pi=0;
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foreach ($peers as $key=>$peer) {
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if ($key!=$pi) {
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lecho(2,'«'.$inst.'»’s peers: entity '.$pi.'/'.$cp.'’s key is not sequential; not checking further.'.N);
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break;
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} elseif (!is_string($peer)) {
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lecho(2,'«'.$inst.'»’s peers: entity '.$pi.'/'.$cp.' is not a string; not checking further.'.N);
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break;
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} else {
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$whynot=[];
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if (in_array($peer,$cinsts)) $whynot[]='it has already been checked';
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if (!validhostname($peer)) $whynot[]='its name is not a valid hostname';
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if (ckexarr($peer)) $whynot[]='its name matches an exclusion regexp';
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if (in_array($peer,$list)) $whynot[]='it is already present in current list';
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if (in_array($peer,$nlist)) $whynot[]='it has already been added to next round list';
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if ($opts['excludedead'] && in_array($peer,$deadinsts)) $whynot[]='it’s dead';
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if (count($whynot)>0) {
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lecho(0,'«'.$inst.'»: not adding peer «'.$peer.'» ('.$pi.'/'.$cp.') to next round list because '.implode(', ',$whynot).'.'.N);
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} else {
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lecho(1,'«'.$inst.'»: adding peer «'.$peer.'» ('.$pi.'/'.$cp.') to next round list :-)'.N);
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$nlist[]=$peer;
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}
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}
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$pi++;
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}
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}
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}
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$res=myq($link,'SELECT * FROM Peers WHERE Hostname=\''.myesc($link,$inst).'\'');
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$nrows=mysqli_num_rows($res);
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if ($nrows>0) {
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if ($nrows>1) lecho(2,'«'.$inst.'» has '.$nrows.' records in “Peers” table! :-('.N);
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$row=mysqli_fetch_assoc($res);
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if ($responded) myq($link,'UPDATE Peers SET LastOkCheckTS='.$now.' WHERE ID='.$row['ID']);
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} else {
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$query='INSERT INTO Peers SET Hostname=\''.myesc($link,$inst).'\', FirstCheckTS='.$now;
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if ($responded) $query.=', LastOkCheckTS='.$now;
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myq($link,$query);
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}
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}
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if (count($nlist)>0) {
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unset($list);
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crawl($nlist,$id+1);
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if ($id+1>$maxround) $maxround=$id+1;
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} else {
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lecho(1,'next round list is empty.'.N);
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}
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lecho(1,'###### END OF ROUND '.$id.' ######'.N);
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}
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function mexit($lev,$msg,$code,$remlock) {
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global $link, $insts, $cinsts, $lockfp, $opts;
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if (isset($insts) && is_array($insts)) sortcheckandsave($insts,'list of responding instances',$opts['peersfp']);
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if (isset($cinsts) && is_array($cinsts)) sortcheckandsave($cinsts,'list of checked instances',$opts['cpeersfp']);
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if ($remlock && isset($lockfp) && is_file($lockfp)) unlink($lockfp);
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lecho($lev,$msg);
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exit($code);
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}
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function lecho($lev,$msg) {
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global $opts, $msgimplevs;
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$time=microdate();
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$msg=$time.' '.$msgimplevs[$lev].': '.$msg;
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if ($lev>=$opts['minmsgimplev']) {
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if ($lev<2)
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echo($msg);
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else
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fwrite(STDERR,$msg);
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}
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}
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function myq(&$link,$query) {
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try { $res=mysqli_query($link,$query); }
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catch (Exception $error) { mexit(3,'query «'.$query.'» failed: '.$error->getMessage().' ('.$error->getCode().').'.N,2,true); }
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// for php versions < 8, which seem to not catch mysql exceptions
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if ($res===false) mexit(3,'query «'.$query.'» failed: '.mysqli_error($link).' ('.mysqli_errno($link).').'.N,2,true);
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return($res);
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}
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function microdate($time=null) {
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if (is_null($time)) $time=microtime(false);
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$time=explode(' ',$time);
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return(date('Y-m-d H:i:s',$time[1]).'.'.substr($time[0],2));
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}
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function sortcheckandsave(&$arr,$arrdesc,&$fp) {
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$buc=count($arr);
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$arr=array_unique($arr);
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$auc=count($arr);
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if ($buc!=$auc) lecho(2,$arrdesc.' contained duplicates, better check the code ;-)'.N);
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lecho(1,'saving ordered '.$arrdesc.' into «'.$fp.'».'.N);
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sort($arr);
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$f=@fopen($fp,'w');
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if ($f!==false) {
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foreach ($arr as $val)
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fwrite($f,$val.N);
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fclose($f);
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} else {
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lecho(2,'couldn’t open «'.$fp.'» for writing.'.N);
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}
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}
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function sighandler($signal) {
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echo(N);
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mexit(1,'interrupted (signal: '.$signal.').'.N,0,true);
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}
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function isempty($val) {
|
||
if (preg_match('/^\s*$/',$val)===1)
|
||
return(true);
|
||
else
|
||
return(false);
|
||
}
|
||
|
||
function waituntilonline() {
|
||
$url='www.google.com';
|
||
$gotoff=false;
|
||
while (false===($f=@fsockopen($url,80,$errno,$errstr,1))) {
|
||
$gotoff=true;
|
||
lecho(2,'it seems we are offline, waiting for 10 seconds before retrying...'.N);
|
||
sleep(10);
|
||
}
|
||
fclose($f);
|
||
if ($gotoff) lecho(1,'it seems we are back online! :-)'.N);
|
||
}
|
||
|
||
function updexarr() {
|
||
global $exarr, $opts;
|
||
if (!is_null($opts['excludefp'])) {
|
||
$f=@fopen($opts['excludefp'],'r');
|
||
if ($f!==false) {
|
||
$i=0;
|
||
$exarr=[];
|
||
while (!feof($f)) {
|
||
$i++;
|
||
$line=trim(fgets($f));
|
||
if (!isempty($line)) {
|
||
if (@preg_match($line,'foo')!==false)
|
||
$exarr[]=$line;
|
||
else
|
||
lecho(2,'exclude file «'.$opts['excludefp'].'» contains an invalid regular expression on line '.$i.': «'.$line.'».'.N);
|
||
}
|
||
}
|
||
} else {
|
||
lecho(2,'could not open exclude file «'.$opts['excludefp'].'» for reading.'.N);
|
||
}
|
||
}
|
||
}
|
||
|
||
function ckexarr($inst) {
|
||
global $exarr;
|
||
foreach ($exarr as $re)
|
||
if (preg_match($re,$inst)===1) return(true);
|
||
return(false);
|
||
}
|
||
|
||
function ismultibyte($s) {
|
||
preg_replace('/./u','.',$s,-1,$c);
|
||
(strlen($s)>$c) ? $r=true : $r=false;
|
||
return($r);
|
||
}
|
||
|
||
function validhostname($hostname) {
|
||
//$hostname=preg_replace('#/.*#','',$hostname);
|
||
//$hostname=preg_replace('#:[0-9]+$#','',$hostname);
|
||
if (ismultibyte($hostname)) $hostname=idn_to_ascii($hostname,IDNA_DEFAULT,INTL_IDNA_VARIANT_UTS46);
|
||
//echo($hostname.N);
|
||
if (strlen($hostname)>253) return(false);
|
||
$labels=explode('.',$hostname);
|
||
foreach($labels as $label) {
|
||
$len=strlen($label);
|
||
if ($len<1 || $len>63) return(false);
|
||
if (preg_match('#^-#',$label)==1) return(false);
|
||
if (preg_match('#-$#',$label)==1) return(false);
|
||
//if (preg_match('#--#',$label)==1) return(false);
|
||
if (preg_match('#^[a-zA-Z0-9-]+$#',$label)!==1) return(false);
|
||
}
|
||
return(true);
|
||
}
|
||
//$url='www.team.starschlep.com/'; if (validhostname($url)) echo('OK: '.$url.N); else echo('KO: '.$url.N); die();
|
||
|
||
?>
|