从Android向HTTP服务器发送连续的HTTP请求

Question

我想从我的Android应用程序向HTTP服务器发送两个连续的HTTP请求，第一个请求是登录，第二个请求是在成功登录时检索XML数据。我尝试了下面这段代码。

 public class XMLParser {
  public String getXmlFromUrl(String url) {

    String xml = null;

    // defaultHttpClient
    DefaultHttpClient httpClient = new DefaultHttpClient();
    HttpPost httpPost1 = new HttpPost(url);   //post for login
    HttpPost httpPost2 = new HttpPost(url);   //post for xml data

   // Building post parameters, key and value pair
    List<NameValuePair> nameValuePair1 = new ArrayList<NameValuePair>(3);
    nameValuePair1.add(new BasicNameValuePair("action", "login"));
    nameValuePair1.add(new BasicNameValuePair("username", "admin"));
    nameValuePair1.add(new BasicNameValuePair("secret", "admin"));

    // Building post parameters, key and value pair
    List<NameValuePair> nameValuePair2 = new ArrayList<NameValuePair>(1);
    nameValuePair2.add(new BasicNameValuePair("action", "sippeers"));

    try {
        httpPost1.setEntity(new UrlEncodedFormEntity(nameValuePair1));

        httpPost2.setEntity(new UrlEncodedFormEntity(nameValuePair2));

        } 
    catch (UnsupportedEncodingException e) {
        // writing error to Log
        e.printStackTrace();
        }

    try {

                //executing first http post
        HttpResponse httpResponse1 = httpClient.execute(httpPost1);

                //executing second http post
        HttpResponse httpResponse2 = httpClient.execute(httpPost2);
        HttpEntity httpEntity2 = httpResponse2.getEntity();
        xml = EntityUtils.toString(httpEntity2);

    } catch (ClientProtocolException e) {
        // writing exception to log
        e.printStackTrace();
    } catch (IOException e) {
        // writing exception to log
        e.printStackTrace();

    }

    return xml;

}

我想首先执行 httpPost1 ，然后在连续登录后我想从第二个HttpPost请求中检索字符串 xml 。执行上面的代码时，我收到错误 Permission Denied 。我想我必须在发送两个HttpPost请求时保持某种会话，并且只有在成功执行第一个请求时才应发送第二个HttpPost请求。 如果有人可以指导我解决这个问题，那将非常感激。

Answer 1

我的意见是，您将登录数据保存在cookie中。 ＆＃34;＆＃34;＆＃34; https://hc.apache.org/httpclient-3.x/cookies.html＆＃34;＆＃34;＆＃34;本文介绍如何设置cookie http请求。