98 lines
2.6 KiB
PHP
98 lines
2.6 KiB
PHP
<?php
|
|
|
|
namespace GuzzleHttp\Handler;
|
|
|
|
use GuzzleHttp\Utils;
|
|
|
|
/**
|
|
* @internal
|
|
*/
|
|
final class HeaderProcessor
|
|
{
|
|
/**
|
|
* Returns the HTTP version, status code, reason phrase, and headers.
|
|
*
|
|
* @param string[] $headers
|
|
*
|
|
* @return array{0:string, 1:int, 2:?string, 3:array}
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public static function parseHeaders(array $headers): array
|
|
{
|
|
if ($headers === []) {
|
|
throw new \RuntimeException('Expected a non-empty array of header data');
|
|
}
|
|
|
|
$headers = self::getLastHeaderBlock(\array_values($headers));
|
|
|
|
$statusLine = \array_shift($headers);
|
|
if ($statusLine === null) {
|
|
throw new \RuntimeException('Expected a non-empty array of header data');
|
|
}
|
|
|
|
$parts = \explode(' ', $statusLine, 3);
|
|
$version = \explode('/', $parts[0])[1] ?? null;
|
|
|
|
if ($version === null) {
|
|
throw new \RuntimeException('HTTP version missing from header data');
|
|
}
|
|
|
|
$status = $parts[1] ?? null;
|
|
|
|
if ($status === null) {
|
|
throw new \RuntimeException('HTTP status code missing from header data');
|
|
}
|
|
|
|
if (!\preg_match('/^\d{3}$/D', $status)) {
|
|
throw new \RuntimeException('HTTP status code is invalid');
|
|
}
|
|
|
|
foreach ($headers as $header) {
|
|
if (\strpos($header, ':') === false) {
|
|
throw new \RuntimeException('HTTP header line is invalid');
|
|
}
|
|
}
|
|
|
|
return [$version, (int) $status, $parts[2] ?? null, Utils::headersFromLines($headers)];
|
|
}
|
|
|
|
public static function isStatusLineCandidate(string $line): bool
|
|
{
|
|
return \preg_match('/^HTTP\/[0-9]+(?:\.[0-9]+)? [0-9]{3}(?: [^\r\n]*)?(?:\r\n|\r|\n)?$/iD', $line) === 1;
|
|
}
|
|
|
|
public static function isValidHeaderFieldLine(string $line): bool
|
|
{
|
|
$parts = \explode(':', $line, 2);
|
|
|
|
if (!isset($parts[1])) {
|
|
return false;
|
|
}
|
|
|
|
if (!\preg_match('/^[a-zA-Z0-9\'`#$%&*+.^_|~!-]+$/D', $parts[0])) {
|
|
return false;
|
|
}
|
|
|
|
return \preg_match('/^[\x20\x09\x21-\x7E\x80-\xFF]*(?:\r\n|\r|\n)?$/D', \trim($parts[1], " \t")) === 1;
|
|
}
|
|
|
|
/**
|
|
* @param non-empty-list<string> $headers
|
|
*
|
|
* @return list<string>
|
|
*/
|
|
private static function getLastHeaderBlock(array $headers): array
|
|
{
|
|
$lastStatusLine = 0;
|
|
|
|
foreach ($headers as $index => $line) {
|
|
if (self::isStatusLineCandidate($line)) {
|
|
$lastStatusLine = $index;
|
|
}
|
|
}
|
|
|
|
return \array_slice($headers, $lastStatusLine);
|
|
}
|
|
}
|