[android]-如何在向服务器发送request时附加已保存的cookie数据

应用场景:
在开发android基于手机端+服务器端的应用时,登陆->获取用户信息->获取授权用户相关业务数据(如用户工作任务安排)
,此时就涉及到在登陆后必须把保存有用户已登陆的cookie数据(和服务器端使用cookie或session来判断用户是否登陆没关系,因为这两种方式,在客户端来说,都是通过保存cookie数据来实现的)一同发送到服务器端,不然,服务器端会认为你没有登陆,而不给提供用户工作任务安排的数据

我在工作中就遇到过这问题

一开始我是这样书写代码的

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import java.io.IOException;

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import java.net.SocketTimeoutException;

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import java.util.ArrayList;

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import java.util.List;

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import org.apache.http.HttpResponse;

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import org.apache.http.NameValuePair;

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import org.apache.http.client.methods.HttpPost;

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import org.apache.http.impl.client.AbstractHttpClient;

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import org.apache.http.impl.client.DefaultHttpClient;

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String result = "";

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/* HTTP Post */

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HttpPost httpRequest = new HttpPost(url);

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List<NameValuePair> params = new ArrayList<NameValuePair>();

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params.add(new BasicNameValuePair(para, data));// jsonParameter

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try {

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    // HTTP request

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    httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

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    // HTTP response

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    DefaultHttpClient defaultHttpClient = new DefaultHttpClient();

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    // 请求超时

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    defaultHttpClient.getParams().setParameter(

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            CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);

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    // 读取超时

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    defaultHttpClient.getParams().setParameter(

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            CoreConnectionPNames.SO_TIMEOUT, 10000);

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    // 发送请求

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    HttpResponse httpResponse = defaultHttpClient.execute(httpRequest);

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    // 得到应答的字符串

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    // 200 ok

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    if (httpResponse.getStatusLine().getStatusCode() == 200) {

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        result = EntityUtils.toString(httpResponse.getEntity());

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    }

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} catch (ClientProtocolException e) {

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    System.out.println("ClientProtocolException:" + e.toString());

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    e.printStackTrace();

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    return null;

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} catch (UnsupportedEncodingException e) {

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    System.out.println("UnsupportedEncodingException:" + e.toString());

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    e.printStackTrace();

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} catch (SocketTimeoutException e) {

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    System.out.println("SocketTimeoutException:" + e.toString());

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    e.printStackTrace();

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} catch (IOException e) {

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    System.out.println("IOException:" + e.toString());

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    e.printStackTrace();

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}

调用发现登陆成功后在获取工作任务时服务器提示未登陆,看来是没把cookie发送到服务器,由是找资料

修改后如下,有两个类
WebHelperResponse.java

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package com.demo.utils;

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public class WebHelperResponse {

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    public String ResponseText = "";

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    public boolean IsOk = false;

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    public boolean IsError = false;

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    public String ErrMsg = "";

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}

WebHelper.java

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package com.nt.android.app.slorders.utils;

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import java.io.IOException;

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import java.net.SocketTimeoutException;

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import java.util.ArrayList;

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import java.util.List;

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import org.apache.http.HttpResponse;

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import org.apache.http.NameValuePair;

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import org.apache.http.client.CookieStore;

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import org.apache.http.client.entity.UrlEncodedFormEntity;

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import org.apache.http.client.methods.HttpPost;

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import org.apache.http.impl.client.AbstractHttpClient;

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import org.apache.http.impl.client.DefaultHttpClient;

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import org.apache.http.message.BasicNameValuePair;

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import org.apache.http.params.CoreConnectionPNames;

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import org.apache.http.protocol.HTTP;

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import org.apache.http.util.EntityUtils;

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public class WebHelper {

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    private static CookieStore cookieStore;

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    public static WebHelperResponse postJson(String url, String data) {

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        return postData(url, data, "jsondata");

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    }

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    public static WebHelperResponse postXml(String url, String data) {

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        return postData(url, data, "xmldata");

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    }

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    // url参数中不允许有空格,否则将在new HttpPost(url)引发java.lang.IllegalArgumentException错误

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    public static WebHelperResponse postData(String url, String data,

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            String para) {

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        WebHelperResponse m_response = new WebHelperResponse();

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        m_response.IsOk = false;

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        m_response.IsError = false;

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        String result = "";

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        /* HTTP Post */

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        HttpPost httpRequest = new HttpPost(url);

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        // param NameValuePair[]

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        // request.getParameter("name")

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        List<NameValuePair> params = new ArrayList<NameValuePair>();

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        params.add(new BasicNameValuePair(para, data));// jsonParameter

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        try {

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            // HTTP request

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            httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

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            // HTTP response

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            DefaultHttpClient defaultHttpClient = new DefaultHttpClient();

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            // 请求超时

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            defaultHttpClient.getParams().setParameter(

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                    CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);

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            // 读取超时

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            defaultHttpClient.getParams().setParameter(

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                    CoreConnectionPNames.SO_TIMEOUT, 10000);

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            // 添加Cookie

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            if (cookieStore != null) {

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                defaultHttpClient.setCookieStore(cookieStore);

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            }

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            // 发送请求

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            HttpResponse httpResponse = defaultHttpClient.execute(httpRequest);

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            int responseStatusCode = httpResponse.getStatusLine()

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                    .getStatusCode();

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            System.out.println("response statuscode:" + responseStatusCode);

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            // 得到应答的字符串

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            // 200 ok

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            if (responseStatusCode == 200) {

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                result = EntityUtils.toString(httpResponse.getEntity());

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                // 保存Cookie

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                cookieStore = ((AbstractHttpClient) defaultHttpClient)

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                        .getCookieStore();

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                m_response.IsError = false;

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                m_response.IsOk = true;

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                m_response.ResponseText = result;

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            } else if (responseStatusCode == 404) {

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                // 找不到页面

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                m_response.IsError = true;

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                m_response.IsOk = false;

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                System.out.println("404:page not found.");

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                m_response.ErrMsg = "不存在此服务,请检查服务器地址配置";

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            } else {

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                m_response.IsError = true;

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                m_response.IsOk = false;

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                System.out.println("error,responsestatuscode:"

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                        + responseStatusCode);

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                m_response.ErrMsg = "服务出错";

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            }

093
        } catch (SocketTimeoutException e) {

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            System.out.println("ClientProtocolException:" + e.toString());

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            e.printStackTrace();

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            m_response.IsError = true;

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            m_response.IsOk = false;

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            m_response.ErrMsg = "连接错误:未能连接到服务器!";

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101
        } catch (IOException e) {

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            System.out.println("ClientProtocolException:" + e.toString());

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            e.printStackTrace();

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            m_response.IsError = true;

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            m_response.IsOk = false;

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            m_response.ErrMsg = "错误:服务器未能提供服务!";

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        }

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        return m_response;

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    }

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}