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Feature main 10818 fix redirect loop #10822

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52 changes: 28 additions & 24 deletions classes/core/PKPPageRouter.php
Original file line number Diff line number Diff line change
Expand Up @@ -500,40 +500,44 @@ private function _getLocaleForUrl(PKPRequest $request, ?Context $context, array
*/
private function _setLocale(PKPRequest $request, ?string $setLocale): void
{
$contextPath = $this->_getRequestedUrlParts(['Core', 'getContextPath'], $request);
$urlLocale = $this->_getRequestedUrlParts(['Core', 'getLocalization'], $request);
$contextPath = $this->_getRequestedUrlParts(Core::getContextPath(...), $request);
$urlLocale = $this->_getRequestedUrlParts(Core::getLocalization(...), $request);
$multiLingual = count($this->_getContextAndLocales($request, $contextPath)[1]) > 1;

if (!$multiLingual && !$urlLocale && !$setLocale || $multiLingual && !$setLocale && $urlLocale === Locale::getLocale()) {
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I simplified the common parts, but the initial intention was just to drop the requirement of knowing the operator precedence.

// Quit if there's no new locale to be set and the request URL is already well-formed
if (!$setLocale && ($multiLingual ? $urlLocale === Locale::getLocale() : !$urlLocale)) {
return;
}

$sessionLocale = (function (string $l) use ($request): string {
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$session = $request->getSession();
if (Locale::isSupported($l) && $l !== $session->get('currentLocale')) {
$session->put('currentLocale', $l);
$request->setCookieVar('currentLocale', $l);
}
// In case session current locale has been set to non-supported locale, or is null, somewhere else
if (!Locale::isSupported($session->get('currentLocale') ?? '')) {
$session->put('currentLocale', Locale::getLocale());
$request->setCookieVar('currentLocale', Locale::getLocale());
}
return $session->get('currentLocale');
})($setLocale ?? $urlLocale);
$session = $request->getSession();
$currentLocale = $session->get('currentLocale') ?? '';
if (!Locale::isSupported($currentLocale ?? '')) {
$currentLocale = null;
}

$newLocale = $setLocale ?? $urlLocale;
if (!Locale::isSupported($newLocale)) {
$newLocale = $currentLocale ?? Locale::getLocale();
}

if ($newLocale !== $currentLocale) {
$session->put('currentLocale', $newLocale);
$request->setCookieVar('currentLocale', $newLocale);
}

// Do not permit basic auth strings (user:password@url) in source parameter for redirects
if (preg_match('#^/\w#', $source = str_replace('@', '', $request->getUserVar('source') ?? ''))) {
$request->redirectUrl($source);
}

$newUrlLocale = $multiLingual ? "/{$newLocale}" : '';
$indexUrl = $this->getIndexUrl($request);
$uri = preg_replace("#^{$indexUrl}#", '', $setLocale ? ($_SERVER['HTTP_REFERER'] ?? '') : $request->getCompleteUrl(), 1);
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$newUrlLocale = $multiLingual ? "/{$sessionLocale}" : '';
$pathInfo = ($uri)
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? preg_replace("#^/{$contextPath}" . ($urlLocale ? "/{$urlLocale}" : '') . '(?=[/?\\#]|$)#', "/{$contextPath}{$newUrlLocale}", $uri, 1)
: "/index{$newUrlLocale}";

$request->redirectUrl($indexUrl . $pathInfo);
$pathInfo = preg_replace('/^' . preg_quote($indexUrl, '/') . '/', '', $setLocale ? ($_SERVER['HTTP_REFERER'] ?? '') : $request->getCompleteUrl(), 1);
$newPathInfo = preg_replace('/^' . preg_quote("/{$contextPath}" . ($urlLocale ? "/{$urlLocale}" : ''), '/') . '(?=[\\/?#])\b/', "/{$contextPath}{$newUrlLocale}", $pathInfo, 1, $replaceCount);
// Failed to setup the new URL, fallback to the default initial URL
if (!$replaceCount) {
$newPathInfo = "/index{$newUrlLocale}";
}
$request->redirectUrl($indexUrl . $newPathInfo);
}
}

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