26 lines
1.5 KiB
PHP
26 lines
1.5 KiB
PHP
<?php
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function ckratelimit($headers) {
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$aaheaders=[];
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array_shift($headers);
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foreach ($headers as $header)
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if (preg_match('#^([^:]+): (.*)$#',$header,$matches)===1)
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$aaheaders[strtolower($matches[1])]=$matches[2];
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//$aaheaders['x-ratelimit-remaining']=0;
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//print_r($aaheaders);
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if (!isset($aaheaders['date'])) return ['ok'=>false,'error'=>'no «date» header'];
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if (!isset($aaheaders['x-ratelimit-reset'])) return ['ok'=>false,'error'=>'no «x-ratelimit-reset» header'];
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if (!isset($aaheaders['x-ratelimit-remaining'])) return ['ok'=>false,'error'=>'no «x-ratelimit-remaining» header'];
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if (preg_match('#^\d+$#',$aaheaders['x-ratelimit-remaining'])!==1) return ['ok'=>false,'error'=>'«x-ratelimit-remaining» header is not an integer'];
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$remaining=$aaheaders['x-ratelimit-remaining']+0;
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$date=@strtotime($aaheaders['date']);
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if (!is_int($date)) return ['ok'=>false,'error'=>'«date» header could not be converted to a unix timestamp'];
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$reset=@strtotime($aaheaders['x-ratelimit-reset']);
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if (!is_int($reset)) return ['ok'=>false,'error'=>'«x-ratelimit-reset» header could not be converted to a unix timestamp'];
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// don't do the one on the line below, since it happens lots of times
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//if ($reset<$date) return ['ok'=>false,'error'=>'the unix timestamp parsed from «x-ratelimit-reset» header is less than the unix timestamp parsed from «date» header'];
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if ($remaining==0)
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return ['ok'=>true,'sleep'=>$reset-$date+1,'remaining'=>$remaining];
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else
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return ['ok'=>true,'sleep'=>0,'remaining'=>$remaining];
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}
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?>
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