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health.php
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health.php
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<?php
/**
* Emulate the GoRouter /health endpoint
* Supposed to return a 200 with body 'ok'
**/
require_once('./lib/common.php');
$oResponse = new Response();
$aRouterIps = $oEnv->asArray('goRouters');
$aHealthyHosts = $oEnv->asArray('healthyHosts');
$sHost = $_SERVER['SERVER_NAME'];
$sUri = $_SERVER['REQUEST_URI'];
$iPort = $oEnv->value('healthPort');
$iStatus = $oEnv->value('unhealthyStatus');
$sEndpoint = $oEnv->value('healthEndpoint');
/**
* This script should only be called by IP address on the specified health port
**/
if(!in_array($sHost, $aRouterIps)) {
$oResponse->setStatus(400);
$oResponse->append('Health check failed: illegal source IP '.$sHost);
} else if($_SERVER['SERVER_PORT'] != $iPort) {
$oResponse->setStatus();
$oResponse->append('Health check failed: illegal port '.$iPort);
} else if($sUri != $sEndpoint) {
$oResponse->setStatus();
$oResponse->append('Health check failed: unexpected uri '.$sUri);
} else if(in_array($sHost, $aHealthyHosts)) {
$oResponse->setStatus(200);
$oResponse->append('ok');
} else {
$oResponse->setStatus($iStatus);
$oResponse->append($iStatus == 200 ? 'ok' : 'error');
}
$oResponse->respond();