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Add DB overload error pages

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This commit is contained in:
Jill Stingray 2020-06-17 21:46:52 +03:00
parent 3e0637e447
commit eaba4a25de
2 changed files with 64 additions and 1 deletions
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10
chandler/Database/DatabaseConnection.php
View file

@ -13,8 +13,16 @@ class DatabaseConnection
private function __construct(string $dsn, string $user, string $password, ?string $tmpFolder = NULL)
{
try {
$connection = new Database\Connection($dsn, $user, $password);
} catch(Database\ConnectionException $ex) {
if($ex->getCode() === "42000")
chandler_db_busy();
else
chandler_http_panic(503, "Service Temporarily Unavailable", "Error estabilishing database connection.");
}
$storage = new FileStorage($tmpFolder ?? (CHANDLER_ROOT . "/tmp/cache/database"));
$connection = new Database\Connection($dsn, $user, $password);
$structure = new Database\Structure($connection, $storage);
$conventions = new DiscoveredConventions($structure);
$context = new Database\Context($connection, $structure, $conventions, $storage);

55
chandler/procedural/db_busy.php Normal file
View file

@ -0,0 +1,55 @@
<?php declare(strict_types=1);
/**
* Ends application and renders DB error page.
*
* @api
* @author kurotsun <celestine@vriska.ru>
* @return void
*/
function chandler_db_busy(): void
{
$errPage = <<<'EOE'
<html>
<head>
<style>body {
font-family: sans-serif;
position: relative;
height: 100vh;
overflow: hidden;
}
#dbErrorBody {
position: absolute;
top: 50%;
left: 50%;
margin-right: -50%;
transform: translate(-50%, -50%);
width: 400px;
text-align: center;
}
#dbErrorBody h1 {
margin-top: 5px;
margin-bottom: 2px;
}
#dbErrorBody span {
color: grey;
}
#dbErrorBody img {
max-width: 128px;
}
</style>
<title>Resource Busy | Chandler App Server</title>
</head>
<body>
<div id="dbErrorBody">
<img src="https://i.imgur.com/N2Ix4fI.png" alt="Database Error">
<h1>Service Unavailable</h1>
<span>Server can't proccess your request at this moment. Please try again later. Sorry for that.</span>
</div>
</body>
</html>
EOE;
header("HTTP/1.1 503 Service Unavailable");
exit($errPage);
}