46 lines
1.4 KiB
PHP
Executable File
46 lines
1.4 KiB
PHP
Executable File
<?php
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if (!function_exists('http-chunked-decode')) {
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/**
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* dechunk an http 'transfer-encoding: chunked' message
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*
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* @param string $chunk the encoded message
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* @return string the decoded message. If $chunk wasn't encoded properly it will be returned unmodified.
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*/
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function http_chunked_decode($chunk) {
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$pos = 0;
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$len = strlen($chunk);
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$dechunk = null;
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while(($pos < $len)
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&& ($chunkLenHex = substr($chunk,$pos, ($newlineAt = strpos($chunk,"\n",$pos+1))-$pos)))
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{
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if (! is_hex($chunkLenHex)) {
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trigger_error('Value is not properly chunk encoded', E_USER_WARNING);
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return $chunk;
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}
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$pos = $newlineAt + 1;
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$chunkLen = hexdec(rtrim($chunkLenHex,"\r\n"));
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$dechunk .= substr($chunk, $pos, $chunkLen);
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$pos = strpos($chunk, "\n", $pos + $chunkLen) + 1;
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}
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return $dechunk;
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}
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}
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/**
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* determine if a string can represent a number in hexadecimal
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*
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* @param string $hex
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* @return boolean true if the string is a hex, otherwise false
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*/
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function is_hex($hex) {
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// regex is for weenies
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$hex = strtolower(trim(ltrim($hex,"0")));
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if (empty($hex)) { $hex = 0; };
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$dec = hexdec($hex);
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return ($hex == dechex($dec));
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}
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?>
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