小编Adi*_*dis的帖子

I am building a real time energy monitoring system, where the data are from sensors. There will be new data every second. The data used will be aggregated to be rendered as charts. I have looked into real time stream processing with big amounts of data, and it lead me to Apache Kafka.

Right now my web app is using Express js. I am using kafka-node library. Now currently, I manually insert new data through the command line as a …

我刚刚使用安装了一个新的 Sails.JS sails new sails。我已经安装了所有依赖项，并且 node_modules 文件夹可用。但是当我尝试使用运行服务器时sails lift，它给了我错误：

error:\nerror: Error:\n-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-\nNo `sails.config.sockets.onlyAllowOrigins` or `sails.config.sockets.beforeConnect`\nsetting was detected.  For security reasons, one of these options must be set\nwhen running Sails in a production environment.\nFor example (in config/env/production.js):\n\nsockets: {\n  onlyAllowOrigins: ["http://www.mydeployedapp.com", "http://mydeployedapp.com"]\n}\n\n\n-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-\n\n    at Hook.configure (A:\\Projects\\sails\\node_modules\\sails-hook-sockets\\lib\\configure.js:60:13)\n    at Hook.wrapper [as configure] (A:\\Projects\\sails\\node_modules\\@sailshq\\lodash\\lib\\index.js:3275:19)\n    at A:\\Projects\\sails\\node_modules\\sails\\lib\\app\\private\\loadHooks.js:331:20\n    at A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:3083:16\n    at eachOfArrayLike (A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:1003:9)\n    at eachOf (A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:1051:5)\n    at Object.eachLimit (A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:3145:5)\n    at configure (A:\\Projects\\sails\\node_modules\\sails\\lib\\app\\private\\loadHooks.js:328:17)\n    at A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:3853:24\n    at replenish (A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:946:17)\n    at iterateeCallback (A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:931:17)\n    at A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:906:16\n    at A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:3858:13\n    at A:\\Projects\\sails\\node_modules\\sails\\node_modules\\async\\dist\\async.js:421:16\n …

我目前正准备部署 Laravel 应用程序。我的功能之一是生成 PDF 并将文件保存在存储文件夹中。但问题是，它仅在存储文件夹具有777权限时才有效。当然，一旦部署，这是一个很大的安全风险。我该如何解决？因为如果我不777许可，它会返回一个Warning: mkdir() [function.mkdir]: Permission denied in ...错误。

谢谢 ：）

我试图根据特定键对数组进行排序，但它不起作用。JSON 格式的数组如下所示。我想按id_question升序排序。

public function compare($ar1, $ar2){
  if ($ar1['id_question']<$ar2['id_question']) {
    return 1;
  }else {
    return -1;
  }
}

uasort($related, Array ($this, 'compare'));

usort($related, function($a, $b){
  if ($a['id_question'] < $b['id_question']) {
   return -1;
  }else {
   return 1;
  }
});