/**
* @return void
*/
function __construct()
{
$ok = false;
if ($this->factory->getConfFile() === null) {
$key = 'phprs_route3_' . sha1(serialize($this->factory->getConf()));
} else {
$key = 'phprs_route3_' . sha1($this->factory->getConfFile());
}
$this->impl = $this->cache->get($key, $ok);
if ($ok && is_object($this->impl)) {
Logger::info("router loaded from cache");
return;
}
$this->impl = $this->factory->create('phprs\\Router');
//缓存过期判断依据
//检查接口文件是否有修改\新增
$check_files = array_values($this->impl->getApiFiles());
$check_dirs = array();
foreach ($check_files as $file) {
if (is_file($file)) {
$check_dirs[] = dirname($file);
}
}
$check_files = array_merge($check_files, $check_dirs);
$check_files[] = $this->factory->getConfFile();
$this->cache->set($key, $this->impl, 0, new FileExpiredChecker($check_files));
//接口文件或者配置文件修改
}
/**
* 执行API
*
* @param Request $request 请求
* @param Response $response 响应
*/
public function __invoke($request, &$response)
{
$args = array();
//绑定参数和返回值
$this->bind['param']->bind($request, $response, $args);
$this->bind['return']->bind($request, $response, $args);
//利用参数绑定的能力，提取@cache注释的信息
$cache_ttl = 0;
$cache_check = null;
$cache_res = new Response(array('ttl' => function ($param) use(&$cache_ttl) {
$cache_ttl = $param;
}, 'check' => function ($param) use(&$cache_check) {
$cache_check = $param;
}, 'body' => function ($_ = null) {
}));
$this->bind['cache']->bind($request, $cache_res, $args);
$use_cache = !$this->bind['cache']->isEmpty();
$given = count($args);
if ($given === 0) {
$required_num = 0;
} else {
ksort($args, SORT_NUMERIC);
end($args);
$required_num = key($args) + 1;
}
Verify::isTrue($given === $required_num, new BadRequest("{$this->ins->class}::{$this->method_name} {$required_num} params required, {$given} given"));
// 变量没给全
$cache_key = null;
if ($use_cache) {
//输入参数包括函数参数和类注入数据两部分
//所以以这些参数的摘要作为缓存的key
$injected = $this->ins->getInjected();
$cache_res->flush();
//取出cache参数
$cache_key = "invoke_{$this->ins->class}_{$this->method_name}_" . sha1(serialize($args) . serialize($injected) . $cache_ttl);
$succeeded = false;
$data = $this->checkAbleCache->get($cache_key, $succeeded);
if ($succeeded && is_array($data)) {
$response->setBuffer($data);
$response->flush();
Logger::info("{$this->ins->class}::{$this->method_name} get response from cache {$cache_key}");
return;
}
}
$impl = $this->ins->getImpl($request);
//
if (!$this->bind['throws']->isEmpty()) {
try {
$res = call_user_func_array(array($impl, $this->method_name), $args);
} catch (\Exception $e) {
$response->clear();
// 清除之前绑定的变量, 异常发生时可能已经写入了一些参数
$this->bind['throws']->bind($request, $response, $e);
$response['break'][][0] = true;
$response->flush();
return;
}
} else {
$res = call_user_func_array(array($impl, $this->method_name), $args);
}
$this->bind['return']->setReturn($res);
if ($use_cache) {
$this->checkAbleCache->set($cache_key, $response->getBuffer(), $cache_ttl, $cache_check);
Logger::info("{$this->ins->class}::{$this->method_name} set response to cache {$cache_key}, ttl={$cache_ttl}, check=" . ($cache_check === null ? 'null' : get_class($cache_check)));
}
$response->flush();
}
/**
* 遍历API目录生成路由规则
* @param object $factory
* @param string $apis_dir
* @param string $class
* @param string $method
* @param array $skipclass 需要跳过的类名
* @return Router
*/
private function loadRoutes(&$routes, $apis_dir, $class, $method)
{
Logger::info("attempt to load router {$apis_dir}");
$dir = null;
if (is_dir($apis_dir) && $class === null) {
$apis_dir = $apis_dir . '/';
Verify::isTrue(is_dir($apis_dir), "{$apis_dir} not a dir");
$dir = @dir($apis_dir);
Verify::isTrue($dir !== null, "open dir {$apis_dir} failed");
$geteach = function () use($dir) {
$name = $dir->read();
if (!$name) {
return $name;
}
return $name;
};
} else {
if (is_file($apis_dir)) {
$files = array($apis_dir);
$apis_dir = '';
} else {
$apis_dir = $apis_dir . '/';
if (is_array($class)) {
foreach ($class as &$v) {
$v .= '.php';
}
$files = $class;
} else {
$files = array($class . '.php');
}
}
$geteach = function () use(&$files) {
$item = each($files);
if ($item) {
return $item[1];
} else {
return false;
}
};
}
while (!!($entry = $geteach())) {
$path = $apis_dir . str_replace('\\', '/', $entry);
if (is_file($path) && substr_compare($entry, '.php', strlen($entry) - 4, 4, true) == 0) {
$class_name = substr($entry, 0, strlen($entry) - 4);
$this->loadApi($routes, $path, $class_name, $method);
} else {
Logger::debug($path . ' ignored');
}
}
if ($dir !== null) {
$dir->close();
}
Logger::info("load router {$apis_dir} ok");
return $routes;
}
