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<?php
namespace FPM;
class Status
{
const HTML_TITLE = 'PHP-FPM Status Page';
/**
* @var array
*/
private $contentTypes = [
'plain' => 'text/plain',
'html' => 'text/html',
'xml' => 'text/xml',
'json' => 'application/json',
];
/**
* @var array
*/
private $defaultFields = [
'pool' => '\w+',
'process manager' => '(static|dynamic|ondemand)',
'start time' => '\d+\/\w{3}\/\d{4}:\d{2}:\d{2}:\d{2}\s[+-]\d{4}',
'start since' => '\d+',
'accepted conn' => '\d+',
'listen queue' => '\d+',
'max listen queue' => '\d+',
'listen queue len' => '\d+',
'idle processes' => '\d+',
'active processes' => '\d+',
'total processes' => '\d+',
'max active processes' => '\d+',
'max children reached' => '\d+',
'slow requests' => '\d+',
];
/**
* Check status page.
*
* @param Response $response
* @param array $fields
* @param string $type
* @throws \Exception
*/
public function checkStatus(Response $response, array $fields, string $type)
{
if (!isset($this->contentTypes[$type])) {
throw new \Exception('Invalid content type ' . $type);
}
$body = $response->getBody($this->contentTypes[$type]);
if ($body === null) {
return;
}
$method = "checkStatus" . ucfirst($type);
$this->$method($body, array_merge($this->defaultFields, $fields));
}
/**
* Make status check for status page.
*
* @param string $body
* @param array $fields
* @param string $rowPattern
* @param string $header
* @param string $footer
* @param null|callable $nameTransformer
* @param null|callable $valueTransformer
* @param bool $startTimeTimestamp
* @param bool $closingName
*/
private function makeStatusCheck(
string $body,
array $fields,
string $rowPattern,
string $header = '',
string $footer = '',
$nameTransformer = null,
$valueTransformer = null,
bool $startTimeTimestamp = false,
bool $closingName = false
) {
if ($startTimeTimestamp && $fields['start time'][0] === '\\') {
$fields['start time'] = '\d+';
}
$pattern = '|' . $header;
foreach ($fields as $name => $value) {
if ($nameTransformer) {
$name = call_user_func($nameTransformer, $name);
}
if ($valueTransformer) {
$value = call_user_func($valueTransformer, $value);
}
if ($closingName) {
$pattern .= sprintf($rowPattern, $name, $value, $name);
} else {
$pattern .= sprintf($rowPattern, $name, $value);
}
}
$pattern = rtrim($pattern, $rowPattern[strlen($rowPattern) - 1]);
$pattern .= $footer . '|';
if (!preg_match($pattern, $body)) {
echo "ERROR: Expected body does not match pattern\n";
echo "BODY:\n";
var_dump($body);
echo "PATTERN:\n";
var_dump($pattern);
}
}
/**
* Check plain status page.
*
* @param string $body
* @param array $fields
*/
protected function checkStatusPlain(string $body, array $fields)
{
$this->makeStatusCheck($body, $fields, "%s:\s+%s\n");
}
/**
* Check html status page.
*
* @param string $body
* @param array $fields
*/
protected function checkStatusHtml(string $body, array $fields)
{
$header = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" " .
"\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" .
"<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">\n" .
"<head><title>" . self::HTML_TITLE . "</title></head>\n" .
"<body>\n<table>\n";
$footer = "\n</table>\n</body></html>";
$this->makeStatusCheck(
$body,
$fields,
"<tr><th>%s</th><td>%s</td></tr>\n",
$header,
$footer
);
}
/**
* Check xml status page.
*
* @param string $body
* @param array $fields
*/
protected function checkStatusXml(string $body, array $fields)
{
$this->makeStatusCheck(
$body,
$fields,
"<%s>%s</%s>\n",
"<\?xml version=\"1.0\" \?>\n<status>\n",
"\n</status>",
function ($name) {
return str_replace(' ', '-', $name);
},
null,
true,
true
);
}
/**
* Check json status page.
*
* @param string $body
* @param array $fields
*/
protected function checkStatusJson(string $body, array $fields)
{
$this->makeStatusCheck(
$body,
$fields,
'"%s":%s,',
'{',
'}',
null,
function ($value) {
if (is_numeric($value) || $value === '\d+') {
return $value;
}
return '"' . $value . '"';
},
true
);
}
}
|
