protected static function splitStream(StreamInterface $stream)
{
$headers = [];
$currentHeader = false;
while ($line = self::getLine($stream)) {
if (preg_match(';^(?P<name>[!#$%&\'*+.^_`\\|~0-9a-zA-Z-]+):(?P<value>.*)$;', $line, $matches)) {
$currentHeader = $matches['name'];
if (!isset($headers[$currentHeader])) {
$headers[$currentHeader] = [];
}
$headers[$currentHeader][] = ltrim($matches['value']);
continue;
}
if (!$currentHeader) {
throw new UnexpectedValueException('Invalid header detected');
}
if (!preg_match('#^[ \\t]#', $line)) {
throw new UnexpectedValueException('Invalid header continuation');
}
// Append continuation to last header value found
$value = array_pop($headers[$currentHeader]);
$headers[$currentHeader][] = $value . ltrim($line);
}
// use RelativeStream to avoid copying initial stream into memory
return [$headers, new RelativeStream($stream, $stream->tell())];
}
