135 lines
3.8 KiB
PHP
135 lines
3.8 KiB
PHP
<?php
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declare(strict_types=1);
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namespace GuzzleHttp\Psr7;
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final class Header
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{
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/**
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* Parse an array of header values containing ";" separated data into an
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* array of associative arrays representing the header key value pair data
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* of the header. When a parameter does not contain a value, but just
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* contains a key, this function will inject a key with a '' string value.
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*
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* @param string|array $header Header to parse into components.
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*/
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public static function parse($header): array
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{
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static $trimmed = "\"' \n\t\r";
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$params = $matches = [];
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foreach ((array) $header as $value) {
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foreach (self::splitList($value) as $val) {
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$part = [];
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foreach (preg_split('/;(?=([^"]*"[^"]*")*[^"]*$)/', $val) as $kvp) {
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if (preg_match_all('/<[^>]+>|[^=]+/', $kvp, $matches)) {
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$m = $matches[0];
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if (isset($m[1])) {
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$part[trim($m[0], $trimmed)] = trim($m[1], $trimmed);
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} else {
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$part[] = trim($m[0], $trimmed);
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}
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}
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}
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if ($part) {
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$params[] = $part;
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}
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}
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}
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return $params;
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}
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/**
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* Converts an array of header values that may contain comma separated
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* headers into an array of headers with no comma separated values.
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*
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* @param string|array $header Header to normalize.
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*
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* @deprecated Use self::splitList() instead.
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*/
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public static function normalize($header): array
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{
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$result = [];
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foreach ((array) $header as $value) {
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foreach (self::splitList($value) as $parsed) {
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$result[] = $parsed;
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}
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}
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return $result;
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}
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/**
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* Splits a HTTP header defined to contain comma-separated list into
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* each individual value. Empty values will be removed.
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*
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* Example headers include 'accept', 'cache-control' and 'if-none-match'.
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*
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* This method must not be used to parse headers that are not defined as
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* a list, such as 'user-agent' or 'set-cookie'.
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*
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* @param string|string[] $values Header value as returned by MessageInterface::getHeader()
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*
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* @return string[]
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*/
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public static function splitList($values): array
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{
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if (!\is_array($values)) {
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$values = [$values];
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}
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$result = [];
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foreach ($values as $value) {
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if (!\is_string($value)) {
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throw new \TypeError('$header must either be a string or an array containing strings.');
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}
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$v = '';
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$isQuoted = false;
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$isEscaped = false;
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for ($i = 0, $max = \strlen($value); $i < $max; $i++) {
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if ($isEscaped) {
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$v .= $value[$i];
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$isEscaped = false;
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continue;
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}
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if (!$isQuoted && $value[$i] === ',') {
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$v = \trim($v);
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if ($v !== '') {
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$result[] = $v;
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}
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$v = '';
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continue;
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}
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if ($isQuoted && $value[$i] === '\\') {
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$isEscaped = true;
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$v .= $value[$i];
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continue;
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}
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if ($value[$i] === '"') {
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$isQuoted = !$isQuoted;
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$v .= $value[$i];
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continue;
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}
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$v .= $value[$i];
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}
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$v = \trim($v);
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if ($v !== '') {
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$result[] = $v;
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}
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}
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return $result;
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}
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}
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