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Change 404 error page to 503 and enhance HTTP request handling with header support

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This commit is contained in:
Fabian Schieder 2026-03-01 14:18:16 +01:00
parent 33b1efb903
commit 37c2ef88e9
2 changed files with 22 additions and 16 deletions
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9
503.php
View File

@ -1,5 +1,5 @@
<?php <?php
http_response_code(404); http_response_code(503);
?> ?>
<!DOCTYPE html> <!DOCTYPE html>
<html lang="de"> <html lang="de">
@ -138,15 +138,14 @@ http_response_code(404);
<div class="error-wrap"> <div class="error-wrap">
<div class="error-icon">🔍</div> <div class="error-icon">🔍</div>
<div class="error-code">404</div> <div class="error-code">503</div>
<hr class="error-divider"> <hr class="error-divider">
<h1 class="error-title">Seite nicht gefunden</h1> <h1 class="error-title">Dienst nicht verfügbar</h1>
<p class="error-desc"> <p class="error-desc">
Die Seite, die du suchst, existiert nicht (mehr)<br> Die Seite die du öffnen willst ist gerade nicht verfügbar<br>
oder wurde vielleicht verschoben.
</p> </p>
<div class="error-actions"> <div class="error-actions">

29
includes/lib/server_status.php
View File

@ -124,7 +124,7 @@ function is_reachable_http_code(?int $code): bool
/** /**
* Perform a lightweight HTTP request (HEAD/GET) without following redirects. * Perform a lightweight HTTP request (HEAD/GET) without following redirects.
* @return array{ok:bool, code:int|null, ms:int|null, error:string|null} * @return array{ok:bool, code:int|null, ms:int|null, error:string|null, headers?:array<int,string>}
*/ */
function check_http_request(string $url, string $method, float $timeoutSeconds = 1.6, ?string $extraHeaders = null): array function check_http_request(string $url, string $method, float $timeoutSeconds = 1.6, ?string $extraHeaders = null): array
{ {
@ -190,13 +190,18 @@ function check_http_request(string $url, string $method, float $timeoutSeconds =
$error = 'Unbekannter Fehler'; $error = 'Unbekannter Fehler';
} }
return ['ok' => $ok, 'code' => $code, 'ms' => $ms, 'error' => $error]; $res = ['ok' => $ok, 'code' => $code, 'ms' => $ms, 'error' => $error];
if (isset($http_response_header) && is_array($http_response_header)) {
$res['headers'] = $http_response_header;
}
return $res;
} }
/** /**
* HTTP check (no redirects). * HTTP check (no redirects).
* - Tries HEAD first. * - Tries HEAD first.
* - If result is a redirect, probes the Location once (still without following further redirects). * - If result is a redirect, probes the Location once, because we don't follow redirects automatically.
* - If HEAD fails, tries a minimal GET with Range. * - If HEAD fails, tries a minimal GET with Range.
* @return array{ok:bool, code:int|null, ms:int|null, error:string|null} * @return array{ok:bool, code:int|null, ms:int|null, error:string|null}
*/ */
@ -207,8 +212,8 @@ function check_http_head(string $url, float $timeoutSeconds = 1.6): array
// If we got a redirect, probe the Location target once, because we don't follow redirects automatically. // If we got a redirect, probe the Location target once, because we don't follow redirects automatically.
if ($head['code'] !== null && $head['code'] >= 300 && $head['code'] < 400) { if ($head['code'] !== null && $head['code'] >= 300 && $head['code'] < 400) {
$loc = null; $loc = null;
if (isset($http_response_header) && is_array($http_response_header)) { if (!empty($head['headers']) && is_array($head['headers'])) {
foreach ($http_response_header as $h) { foreach ($head['headers'] as $h) {
if (stripos((string)$h, 'Location:') === 0) { if (stripos((string)$h, 'Location:') === 0) {
$loc = trim(substr((string)$h, strlen('Location:'))); $loc = trim(substr((string)$h, strlen('Location:')));
break; break;
@ -232,12 +237,14 @@ function check_http_head(string $url, float $timeoutSeconds = 1.6): array
$probe = check_http_request($loc, 'GET', $timeoutSeconds, "Range: bytes=0-0\r\n"); $probe = check_http_request($loc, 'GET', $timeoutSeconds, "Range: bytes=0-0\r\n");
} }
// If the target is clearly reachable/unreachable, use that.
if ($probe['code'] !== null && ($probe['code'] < 300 || $probe['code'] >= 400)) { if ($probe['code'] !== null && ($probe['code'] < 300 || $probe['code'] >= 400)) {
return $probe; // return the probe result (drop headers)
if (!$probe['ok'] && empty($probe['error'])) {
$probe['error'] = 'HTTP ' . (string)$probe['code'];
}
return ['ok' => (bool)$probe['ok'], 'code' => $probe['code'], 'ms' => $probe['ms'], 'error' => $probe['error']];
} }
// Otherwise keep the redirect info, but don't mark it UP.
return ['ok' => false, 'code' => $head['code'], 'ms' => $head['ms'], 'error' => 'Redirect']; return ['ok' => false, 'code' => $head['code'], 'ms' => $head['ms'], 'error' => 'Redirect'];
} }
@ -245,7 +252,7 @@ function check_http_head(string $url, float $timeoutSeconds = 1.6): array
} }
if ($head['ok']) { if ($head['ok']) {
return $head; return ['ok' => true, 'code' => $head['code'], 'ms' => $head['ms'], 'error' => null];
} }
// If HEAD is not supported/misconfigured, a GET with Range is a cheap reachability check. // If HEAD is not supported/misconfigured, a GET with Range is a cheap reachability check.
@ -253,11 +260,11 @@ function check_http_head(string $url, float $timeoutSeconds = 1.6): array
// prefer the GET result if it produced a code (more reliable) // prefer the GET result if it produced a code (more reliable)
if ($get['code'] !== null) { if ($get['code'] !== null) {
return $get; return ['ok' => $get['ok'], 'code' => $get['code'], 'ms' => $get['ms'], 'error' => $get['error']];
} }
// otherwise fall back to the HEAD info // otherwise fall back to the HEAD info
return $head; return ['ok' => false, 'code' => $head['code'], 'ms' => $head['ms'], 'error' => $head['error']];
} }
function build_server_status(array $targets): array function build_server_status(array $targets): array