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Improve SimplePie redirects (POST to GET, remove authentication cross-origin) #78

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Improve SimplePie redirects (POST to GET, remove authentication cross-origin) #78

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cff0d36
Improve SimplePie redirects (POST to GET, remove authentication cross…
Inverle May 30, 2026
0c3b3d7
PHP 7.2+ compatibility
Inverle May 30, 2026
0d69814
Normalize URLs to lowercase when parsing
Inverle May 30, 2026
4c8a012
Fix wrong URL printed in error message
Inverle May 30, 2026
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49 changes: 49 additions & 0 deletions src/File.php
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Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,55 @@ public function __construct(string $url, int $timeout = 10, int $redirects = 5,
$this->success = false;
return;
}

// FreshRSS: POST to GET on redirect
if (isset($curl_options[CURLOPT_POST]) && in_array($this->status_code, [301, 302, 303], true)) { // Not for 307 and 308, which must not change the HTTP method
unset($curl_options[CURLOPT_POST]);
unset($curl_options[CURLOPT_POSTFIELDS]);
if (is_array($curl_options[CURLOPT_HTTPHEADER] ?? null)) {
$curl_options[CURLOPT_HTTPHEADER] = array_filter(
$curl_options[CURLOPT_HTTPHEADER],
function ($header) {
return is_string($header) && substr(strtolower(trim($header)), 0, 13) !== 'content-type:';
}
);
}
}
// FreshRSS: cross-origin authentication headers removal
if (($url_parts_from = parse_url(strtolower($url))) === false) {
throw new \InvalidArgumentException('Malformed URL: ' . $url);
}
if (($url_parts_to = parse_url(strtolower($location))) === false) {
$this->error = "Invalid redirect location: malformed URL “{$location}”";
$this->success = false;
return;
}
foreach ([&$url_parts_from, &$url_parts_to] as &$url_parts) {
if (!isset($url_parts['port']) && isset($url_parts['scheme'])) {
if ($url_parts['scheme'] === 'http') {
$url_parts['port'] = 80;
} elseif ($url_parts['scheme'] === 'https') {
$url_parts['port'] = 443;
}
}
}
unset($url_parts);
$sameOriginRedirect =
($url_parts_from['scheme'] ?? '') === ($url_parts_to['scheme'] ?? '') &&
($url_parts_from['host'] ?? '') === ($url_parts_to['host'] ?? '') &&
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($url_parts_from['port'] ?? '') === ($url_parts_to['port'] ?? '');
if (!$sameOriginRedirect) {
unset($curl_options[CURLOPT_COOKIE]);
if (is_array($curl_options[CURLOPT_HTTPHEADER] ?? null)) {
$curl_options[CURLOPT_HTTPHEADER] = array_filter(
$curl_options[CURLOPT_HTTPHEADER],
function ($header) {
return is_string($header) && !preg_match('/^(Cookie|Authorization)\s*:/i', $header);
}
);
}
}

$this->permanentUrlMutable = $this->permanentUrlMutable && ($this->status_code == 301 || $this->status_code == 308);
$this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen, $curl_options);
return;
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