Dart是否支持PHP,如$ _SESSION(会话)？

Question

服务器端Dart是否支持PHP中的会话:

<?php

session_start();

$_SESSION['fruit'] = 'apple';

页面加载时保留数据.

Answer 1

是Dart支持在PHP中或多或少的会话.

让我们编写一个简单的程序,将苹果和香蕉之间的水果随机化,并将选择保存到会话中.

import 'dart:io';
import 'dart:math';

// A method that returns "apple" or "banana" randomly.
String getRandomFruit() => new Random().nextBool() ? 'apple' : 'banana';

main() {
  var server = new HttpServer();

  server.defaultRequestHandler = (HttpRequest req, HttpResponse res) {
    // Initialize session with an empty {} object as data.
    var session = req.session((s) => s.data = {});

    // Save fruit to session if there is nothing in there.
    if (session.data['fruit'] == null)
      session.data['fruit'] = getRandomFruit();

    // Retrieve fruit from the session.
    var fruit = session.data['fruit'];

    res.outputStream.writeString("Your fruit: $fruit", Encoding.UTF_8);
    res.outputStream.close();
  };

  server.listen('127.0.0.1', 80);
}

现在,当您运行代码并转到时http://localhost,只要会话保持打开,每次看到相同的水果,因为我们将水果保存到会话中.

笔记:

• 所述HttpRequest类具有这种方法session(),其初始化(或返回)的HttpSession实例.
• 该HttpSession有一个叫做财产data,但你可能要初始化它首先是一个空的{}.