php - 服务器端 PHP session 在 android 中不起作用

Question

我在 android 中使用登录概念，登录一个用户名只能登录一次，同一用户名不能第二次登录。它工作正常。现在我想在服务器端使用 session 超时概念，但它不起作用，值正在存储到 session 中，但它无法获取另一个 php 文件。

我的登录php代码

session_start();                
$_SESSION['user'] =1; 

第二个 php 代码

session_start();
    if(isset($_SESSION['user']))
    {
    //my action
    }

我的安卓代码

  DefaultHttpClient httpClient = new DefaultHttpClient();
            httpClient.getParams().setParameter(ClientPNames.COOKIE_POLICY, CookiePolicy.RFC_2109);
            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader("User-Agent", "Mozilla/5.0 (X11; U; Linux " +
                    "i686; en-US; rv:1.8.1.6) Gecko/20061201 Firefox/2.0.0.6 (Ubuntu-feisty)");
                httpPost.setHeader("Accept", "text/html,application/xml," +
                    "application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");
                httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");
            httpPost.setEntity(new UrlEncodedFormEntity(params));

            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();
            is = httpEntity.getContent();

Answer 1

这是您用于第一个和第二个请求的代码吗？

如果是这样，问题是您总是创建一个新的客户端，这会导致在服务器端产生新的 session ，因为存储在 cookie 中的 sessionid 不可用。

因此创建一次 httpClient，并为两个请求使用相同的实例。应该可以解决问题

像这样:

 DefaultHttpClient httpClient = new DefaultHttpClient();
            httpClient.getParams().setParameter(ClientPNames.COOKIE_POLICY, CookiePolicy.RFC_2109);

            HttpPost httpPost1 = new HttpPost(url1);

        httpPost1.setHeader("User-Agent", "Mozilla/5.0 (X11; U; Linux " +
                "i686; en-US; rv:1.8.1.6) Gecko/20061201 Firefox/2.0.0.6 (Ubuntu-feisty)");
            httpPost1.setHeader("Accept", "text/html,application/xml," +
                "application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");
            httpPost1.setHeader("Content-Type", "application/x-www-form-urlencoded");
        httpPost1.setEntity(new UrlEncodedFormEntity(params));

        HttpResponse httpResponse = httpClient.execute(httpPost1);
        HttpEntity httpEntity = httpResponse.getEntity();
        is1 = httpEntity.getContent();


        HttpPost httpPost2 = new HttpPost(url2);
        httpPost2.setHeader("User-Agent", "Mozilla/5.0 (X11; U; Linux " +
                "i686; en-US; rv:1.8.1.6) Gecko/20061201 Firefox/2.0.0.6 (Ubuntu-feisty)");
            httpPost2.setHeader("Accept", "text/html,application/xml," +
                "application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");
            httpPost2.setHeader("Content-Type", "application/x-www-form-urlencoded");
        httpPost2.setEntity(new UrlEncodedFormEntity(params));

        HttpResponse httpResponse2 = httpClient.execute(httpPost2);
        HttpEntity httpEntity2 = httpResponse2.getEntity();
        is2 = httpEntity2.getContent();