78 lines
2.0 KiB
PHP
78 lines
2.0 KiB
PHP
<?php
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namespace GuzzleHttp\Handler;
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use GuzzleHttp\Utils;
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/**
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* @internal
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*/
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final class HeaderProcessor
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{
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/**
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* Returns the HTTP version, status code, reason phrase, and headers.
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*
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* @param string[] $headers
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*
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* @return array{0:string, 1:int, 2:?string, 3:array}
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*
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* @throws \RuntimeException
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*/
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public static function parseHeaders(array $headers): array
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{
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if ($headers === []) {
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throw new \RuntimeException('Expected a non-empty array of header data');
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}
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$headers = self::getLastHeaderBlock(\array_values($headers));
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$statusLine = \array_shift($headers);
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if ($statusLine === null) {
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throw new \RuntimeException('Expected a non-empty array of header data');
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}
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$parts = \explode(' ', $statusLine, 3);
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$version = \explode('/', $parts[0])[1] ?? null;
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if ($version === null) {
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throw new \RuntimeException('HTTP version missing from header data');
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}
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$status = $parts[1] ?? null;
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if ($status === null) {
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throw new \RuntimeException('HTTP status code missing from header data');
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}
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if (!\preg_match('/^\d{3}$/', $status)) {
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throw new \RuntimeException('HTTP status code is invalid');
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}
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foreach ($headers as $header) {
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if (\strpos($header, ':') === false) {
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throw new \RuntimeException('HTTP header line is invalid');
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}
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}
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return [$version, (int) $status, $parts[2] ?? null, Utils::headersFromLines($headers)];
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}
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/**
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* @param non-empty-list<string> $headers
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*
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* @return list<string>
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*/
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private static function getLastHeaderBlock(array $headers): array
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{
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$lastStatusLine = 0;
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foreach ($headers as $index => $line) {
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if (\preg_match('/^HTTP\/\S+\s+/i', $line)) {
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$lastStatusLine = $index;
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}
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}
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return \array_slice($headers, $lastStatusLine);
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}
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}
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